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MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
General Description
Benefits and Features
The MAX17632 is a high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated
MOSFETs operating over an input-voltage range of 4.5V
to 36V. It can deliver up to 2A current. The MAX17632 is
available in three variants, MAX17632A, MAX17632B,
and MAX17632C. The MAX17632A and MAX17632B are
fixed 3.3V and fixed 5V output parts, respectively. The
MAX17632C is an adjustable output voltage (from 0.9V
up to 90% of VIN) part. Built-in compensation across the
output-voltage range eliminates the need for external
compensation components.
●● Reduces External Components and Total Cost
• No Schottky - Synchronous Operation
• Internal Compensation Components
• All-Ceramic Capacitors, Compact Layout
●● Reduces Number of DC-DC Regulators to Stock
• Wide 4.5V to 36V Input
• Adjustable Output Voltage Range from 0.9V up to
90% of VIN
• Delivers up to 2A Over the Temperature Range
• 400kHz to 2.2MHz Adjustable Frequency with
External Clock Synchronization
• Available in a 16-Pin, 3mm x 3mm TQFN Package
The MAX17632 features peak-current-mode control architecture. The device can be operated in the forced pulsewidth modulation (PWM), or pulse-frequency modulation
(PFM), or discontinuous-conduction mode (DCM) to enable
high efficiency under full-load and light-load conditions. The
MAX17632 offers a low minimum on-time that allows high
switching frequencies and a smaller solution size.
●● Reduces Power Dissipation
• Peak Efficiency of 94%
• PFM and DCM Modes Enable Enhanced LightLoad Efficiency
• Auxiliary Bootstrap Supply (EXTVCC) for Improved
Efficiency
• 2.8μA Shutdown Current
The feedback-voltage regulation accuracy over -40°C to
+125°C for the MAX17632A/MAX17632B/MAX17632C is
±1.2%.The device is available in a 16-pin (3mm x 3mm)
TQFN package. Simulation models are available.
●● Base Station Power Supplies
●● Operates Reliably in Adverse Industrial Environments
• Hiccup-Mode Overload Protection
• Adjustable and Monotonic Startup with Prebiased
Output Voltage
• Built-in Output-Voltage Monitoring with RESET
• Programmable EN/UVLO Threshold
• Overtemperature Protection
• High Industrial -40°C to +125°C Ambient Operating
Temperature Range / -40°C to +150°C Junction
Temperature Range
●● Wall Transformer Regulation
Ordering Information appears at end of data sheet.
Applications
●● Industrial Control Power Supplies
●● General-Purpose Point-of-Load
●● Distributed Supply Regulation
●● High Voltage Single-Board Systems
Typical Application Circuit
RT
EN/UVLO
VIN
MODE/SYNC
C3
2.2µF
C2
5600pF
19-100164; Rev 2; 3/19
VCC
SGND
SS
RESET
MAX17632B
C1
2.2µF
BST
LX
C5
0.1µF
L1
10µH
C4
22µF
FB
EXTVCC
PGND
EP
VIN
6.5V TO 36V
VOUT
5V, 2A
fSW : 400kHz
C1: 2.2µF/50V/X7R/1206 (GRM31CR71H225KA88)
L1: 15µH (XAL5050-103ME)
C4: 22µF/10V/X7R/1210 (GRM32ER71A226K)
MODE: PWM
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Absolute Maximum Ratings
VIN to PGND..........................................................-0.3V to +40V
EN/UVLO to SGND....................................... -0.3V to VIN + 0.3V
LX to PGND.................................................. -0.3V to VIN + 0.3V
EXTVCC to SGND................................................-5.5V to +6.5V
BST to PGND......................................................-0.3V to +46.5V
BST to LX..............................................................-0.3V to +6.5V
BST to VCC............................................................-0.3V to +40V
RESET, SS, MODE/SYNC, VCC, RT to SGND....-0.3V to +6.5V
FB to SGND (MAX17632A & MAX17632B)............-5.5V to 6.5V
FB to SGND (MAX17632C) ...................................-0.3V to 6.5V
PGND to SGND.....................................................-0.3V to +0.3V
LX total RMS current...........................................................±3.5A
Output Short-Circuit Duration.....................................Continuous
Continuous Power Dissipation (Multilayer Board)
(TA = +70°C, derate 20.8mW/°C above +70°C.).....1666.7mW
Operating Temperature Range (Note 1)...............-40°C to 125°C
Junction Temperature.......................................................+150°C
Storage Temperature Range............................. -65°C to +150°C
Lead Temperature (soldering, 10s).................................. +300°C
Soldering Temperature (reflow)........................................+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Package Information
PACKAGE TYPE: 16-PIN TQFN
Package Code
T1633+5C
Outline Number
21-0136
Land Pattern Number
90-0032
THERMAL RESISTANCE, FOUR-LAYER BOARD (Note 2)
Junction to Ambient (θJA)
38ºC/W
Junction to Case (θJC)
10ºC/W
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
Note 1: Junction temperature greater than +125°C degrades operating lifetimes.
Note 2: Package thermal resistances were obtained using the MAX17632 Evaluation Kit.
Electrical Characteristics
(VIN = VEN/UVLO = 24V, RRT = unconnected (fSW = 400 kHz), CVCC = 2.2μF, VMODE/SYNC = VEXTVCC = VSGND = VPGND = 0V,
VFB = 3.67V (MAX17632A), VFB = 5.5V (MAX17632B), VFB = 1V (MAX17632C), LX = SS = RESET = Open, VBST to VLX = 5V,
TA = -40°C to 125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are referenced to SGND, unless otherwise
noted.) (Note 3 )
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
36
V
VEN/UVLO = 0V (Shutdown mode)
2.8
4.5
μA
MODE/SYNC = Open, VEXTVCC = 5V
50
MODE/SYNC = Open, RRT = 50.8kΩ,
VEXTVCC = 5V
60
IQ_DCM
DCM Mode, VLX = 0.1V
1.2
IQ_PWM
Normal Switching Mode, fSW = 400kHz,
VFB = 3V (MAX17632A), VFB = 4.4V
(MAX17632B), VFB = 0.8V (MAX17632C)
INPUT SUPPLY (VIN)
Input-Voltage Range
Input-Shutdown Current
VIN
IIN-SH
IQ_PFM
Input-Quiescent Current
www.maximintegrated.com
4.5
5
μA
1.8
mA
Maxim Integrated │ 2
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Electrical Characteristics (continued)
(VIN = VEN/UVLO = 24V, RRT = unconnected (fSW = 400 kHz), CVCC = 2.2μF, VMODE/SYNC = VEXTVCC = VSGND = VPGND = 0V,
VFB = 3.67V (MAX17632A), VFB = 5.5V (MAX17632B), VFB = 1V (MAX17632C), LX = SS = RESET = Open, VBST to VLX = 5V,
TA = -40°C to 125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are referenced to SGND, unless otherwise
noted.) (Note 3 )
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ENABLE/UVLO (EN/UVLO)
EN/UVLO Threshold
EN Input-Leakage Current
VENR
VEN/UVLO rising
1.19
1.215
1.26
VENF
VEN/UVLO falling
1.068
1.09
1.131
VEN/UVLO = 0V, TA = +25ºC
-50
0
+50
1mA ≤ IVCC ≤ 15mA
4.75
5
5.25
6V ≤ VIN ≤ 36V, IVCC = 1mA
4.75
5
5.25
25
50
IEN
V
nA
VCC (LDO)
VCC Output-Voltage Range
VCC Current Limit
VCC Dropout
VCC UVLO
VCC
IVCC-MAX
VCC-DO
VCC = 4.5V, VIN = 7.5V
VIN = 4.5V, IVCC = 10mA
V
mA
0.3
VCC_UVR
VCC rising
4.05
4.2
4.3
VCC_UVF
VCC falling
3.65
3.8
3.9
VEXTVCC rising
4.56
4.7
4.84
VEXTVCC falling
4.3
4.45
4.6
V
V
EXTVCC
EXTVCC Switchover
Threshold
V
POWER MOSFETS
High-Side nMOS OnResistance
RDS-ONH
ILX = 0.3A, sourcing
125
250
mΩ
Low-Side nMOS
On-Resistance
RDS-ONL
ILX = 0.3A, sinking
80
160
mΩ
LX Leakage Current
ILX_LKG
VLX = (VPGND +1V) to (VIN - 1V),
TA = +25°C
-2
+3
μA
VSS = 0.5V
4.7
5
5.3
μA
MODE/SYNC = SGND or MODE/SYNC =
VCC, for MAX17632A
3.26
3.3
3.34
MODE/SYNC = SGND or MODE/SYNC =
VCC, for MAX17632B
4.94
5
5.06
MODE/SYNC = SGND or MODE/SYNC =
VCC, for MAX17632C
0.889
0.9
0.911
MODE/SYNC = Open, for MAX17632A
3.26
3.36
3.43
MODE/SYNC = Open, for MAX17632B
4.94
5.09
5.20
MODE/SYNC = Open, for MAX17632C
0.89
0.915
0.936
SOFT-START (SS)
Charging Current
ISS
FEEDBACK (FB)
FB Regulation Voltage
FB Input-Bias Current
VFB-REG
IFB
For MAX17632A
21
For MAX17632B
17
0 ≤ VFB ≤ 1V, TA = 25ºC, For MAX17632C
www.maximintegrated.com
-50
V
μA
+50
nA
Maxim Integrated │ 3
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Electrical Characteristics (continued)
(VIN = VEN/UVLO = 24V, RRT = unconnected (fSW = 400 kHz), CVCC = 2.2μF, VMODE/SYNC = VEXTVCC = VSGND = VPGND = 0V,
VFB = 3.67V (MAX17632A), VFB = 5.5V (MAX17632B), VFB = 1V (MAX17632C), LX = SS = RESET = Open, VBST to VLX = 5V,
TA = -40°C to 125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are referenced to SGND, unless otherwise
noted.) (Note 3 )
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MODE/SYNC
MODE Threshold
SYNC Frequency-Capture
Range
VM-DCM
MODE/SYNC = VCC (DCM mode)
VM-PFM
MODE/SYNC = Open (PFM mode)
VM-PWM
MODE/SYNC = SGND (PWM mode)
fSYNC
fSW set by RRT
SYNC Pulse Width
SYNC Threshold
VCC 0.65
V
VCC/2
0.75
1.1 x fSW
1.4 x fSW
50
VIH
kHz
ns
2.1
VIL
0.8
V
CURRENT LIMIT
Peak Current-Limit
Threshold
Runaway Peak CurrentLimit Threshold
PFM Peak Current-Limit
Threshold
Valley Current-Limit
Threshold
IPEAKLIMIT
IRUNAWAYLIMIT
IPFM
IVALLEYLIMIT
2.7
3.15
3.6
A
3
3.6
4.1
A
MODE/SYNC = Open
MODE/SYNC = Open or MODE/SYNC =
VCC
0.8
-0.15
MODE/SYNC = SGND, VFB > 0.65
0
A
+0.15
A
-1.8
RT
RRT = 50.8kΩ
Switching Frequency
VFB Undervoltage Trip
Level to Cause Hiccup
fSW
VFB-HICF
HICCUP Timeout
tON-MIN
Minimum Off-Time
tOFF-MIN
www.maximintegrated.com
LXDT
400
420
RRT = 40.2kΩ
475
500
525
RRT = 8.06kΩ
1950
2200
2450
RRT = Open
370
400
430
For MAX17632A
2.05
2.13
2.2
For MAX17632B
3.11
3.22
3.33
For MAX17632C
0.56
0.58
0.6
(Note 4)
Minimum On-Time
LX Dead Time
380
32768
52
140
5
kHz
V
Cycles
80
ns
160
ns
ns
Maxim Integrated │ 4
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Electrical Characteristics (continued)
(VIN = VEN/UVLO = 24V, RRT = unconnected (fSW = 400 kHz), CVCC = 2.2μF, VMODE/SYNC = VEXTVCC = VSGND = VPGND = 0V,
VFB = 3.67V (MAX17632A), VFB = 5.5V (MAX17632B), VFB = 1V (MAX17632C), LX = SS = RESET = Open, VBST to VLX = 5V,
TA = -40°C to 125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are referenced to SGND, unless otherwise
noted.) (Note 3 )
PARAMETER
RESET
RESET Output-Level Low
RESET Output-Leakage
Current
SYMBOL
VRESETL
CONDITIONS
MIN
TYP
IRESET = 10mA
IRESETLKG TA = TJ = 25ºC, VRESET = 5.5V
-100
MAX
UNITS
400
mV
100
nA
FB Threshold for RESET
Deassertion
VFB-OKR
VFB rising
93.8
95
97.8
%
FB Threshold for RESET
Assertion
VFB-OKF
VFB falling
90.5
92
94.6
%
RESET Delay after FB
Reaches 95% Regulation
1024
Cycles
165
°C
10
°C
THERMAL SHUTDOWN (TEMP)
Thermal-Shutdown
Threshold
Thermal-Shutdown
Hysteresis
Temperature rising
Note 3: Electrical specifications are production tested at TA = +25°C. Specifications over the entire operating temperature range are
guaranteed by design and characterization.
Note 4: See the Overcurrent Protection (OCP)/Hiccup Mode section for more details
www.maximintegrated.com
Maxim Integrated │ 5
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Typical Operating Characteristics
(VEN/UVLO = VIN = 24V, VSGND = VPGND = 0V, CVCC = 2.2μF, CBST = 0.1μF, CSS = 5600pF, TA = -40°C to +125°C, unless otherwise
noted. Typical values are at TA = +25°C. All voltages are referenced to SGND, unless otherwise noted.)
100
MAX17632A
EFFICIENCY vs. LOAD CURRENT
FIGURE 3 CIRCUIT
100
toc01
90
70
VIN = 12V
60
VIN = 24V
VIN = 36V
EFFICIENCY (%)
EFFICIENCY (%)
80
VIN = 4.5V
50
40
30
100
toc02
90
90
80
80
70
VIN = 36V
60
VIN = 24V
VIN = 12V
50
40
20
VIN = 24V
VIN = 12V
50
VIN = 4.5V
20
0.001
0.1
1
LOAD CURRENT (A)
CONDITIONS: FIXED 3.3V OUTPUT, DCM MODE, fSW = 400kHz
0.01
0.1
1
LOAD CURRENT (A)
CONDITIONS: FIXED 3.3V OUTPUT, PFM MODE, fSW = 400kHz
MAX17632B
EFFICIENCY vs. LOAD CURRENT
FIGURE 4 CIRCUIT
MAX17632B
EFFICIENCY vs. LOAD CURRENT
FIGURE 4 CIRCUIT
MAX17632B
EFFICIENCY vs. LOAD CURRENT
FIGURE 4 CIRCUIT
0.5
0.01
100
toc04
90
toc05
100
90
90
80
80
VIN = 12V
60
VIN = 24V
VIN = 36V
EFFICIENCY (%)
70
VIN = 6.5V
50
40
30
VIN = 24V
60
VIN = 12V
50
20
VIN = 6.5V
30
0.0
1.0
1.5
2.0
LOAD CURRENT (A)
CONDITIONS: FIXED 5V OUTPUT, PWM MODE, fSW = 400kHz
MAX17632C
EFFICIENCY vs. LOAD CURRENT
FIGURE 7 CIRCUIT
100
100
MAX17632C
EFFICIENCY vs. LOAD CURRENT
FIGURE 7 CIRCUIT
100
toc08
80
80
VIN = 12V
VIN = 24V VIN = 28V
VIN = 5.5V
50
40
30
VIN = 28V
60
VIN = 24V
50
VIN = 12V
40
20
VIN = 5.5V
20
0.0
0.5
1.0
1.5
2.0
LOAD CURRENT (A)
CONDITIONS: ADJUSTABLE 3.3V OUTPUT, PWM MODE, fSW = 1MHz
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0.01
0.1
1
LOAD CURRENT (A)
CONDITIONS: ADJUSTABLE 3.3V OUTPUT, DCM MODE, fSW = 1MHz
toc09
70
VIN = 28V
60
VIN = 12V
50
VIN = 24V
40
30
30
10
0
70
EFFICIENCY (%)
90
EFFICIENCY (%)
90
80
60
VIN = 6.5V
0.01
0.1
1
LOAD CURRENT (A)
CONDITIONS: FIXED 5V OUTPUT, PFM MODE, fSW = 400kHz
90
70
VIN = 12V
50
20
0.001
0.01
MAX17632C
EFFICIENCY vs. LOAD CURRENT
FIGURE 7 CIRCUIT
toc07
VIN = 24V
30
0.1
1
LOAD CURRENT (A)
CONDITIONS: FIXED 5V OUTPUT, DCM MODE, fSW = 400kHz
0.5
60
toc06
VIN = 36V
70
40
40
10
0
VIN = 36V
70
EFFICIENCY (%)
80
EFFICIENCY (%)
VIN = 36V
60
1.0
1.5
2.0
LOAD CURRENT (A)
CONDITIONS: FIXED 3.3V OUTPUT, PWM MODE, fSW = 400kHz
0.0
100
EFFICIENCY (%)
toc03
30
30
10
70
40
VIN = 4.5V
20
0
MAX17632A
EFFICIENCY vs. LOAD CURRENT
FIGURE 3 CIRCUIT
EFFICIENCY (%)
MAX17632A
EFFICIENCY vs. LOAD CURRENT
FIGURE 3 CIRCUIT
VIN = 5.5V
20
0.001
0.01
0.1
1
LOAD CURRENT (A)
CONDITIONS: ADJUSTABLE 3.3V OUTPUT, PFM MODE, fSW = 1MHz
Maxim Integrated │ 6
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Typical Operating Characteristics (continued)
(VEN/UVLO = VIN = 24V, VSGND = VPGND = 0V, CVCC = 2.2μF, CBST = 0.1μF, CSS = 5600pF, TA = -40°C to +125°C, unless otherwise
noted. Typical values are at TA = +25°C. All voltages are referenced to SGND, unless otherwise noted.)
MAX17632A
LOAD AND LINE REGULATION
FIGURE 3 CIRCUIT
toc10
3.32
VIN = 12V
OUTPUT VOLTAGE (V)
VIN = 36V
3.30
3.28
VIN = 4.5V
VIN = 24V
3.30
3.28
0.0
1.0
1.5
2.0
LOAD CURRENT (A)
CONDITIONS: FIXED 3.3V OUTPUT, PWM MODE, fSW = 400kHz
5.02
VIN = 4.5V
toc13
0.0
VIN = 24V
0.5
MAX17632B
LOAD AND LINE REGULATION
FIGURE 4 CIRCUIT
5.02
VIN = 24V
VIN = 36V
3.32
3.28
3.24
3.20
1.0
1.5
2.0
LOAD CURRENT (A)
CONDITIONS: FIXED 3.3V OUTPUT, DCM MODE, fSW = 400kHz
0.5
MAX17632B
LOAD AND LINE REGULATION
FIGURE 4 CIRCUIT
VIN = 36V
1.0
1.5
2.0
LOAD CURRENT (A)
CONDITIONS: FIXED 3.3V OUTPUT, PFM MODE, fSW = 400kHz
toc14
0.0
5.20
5.01
VIN = 6.5V
5.00
4.99
VIN = 6.5V
VIN = 24V
VIN = 36V
5.00
VIN = 6.5V
4.99
VIN = 24V
toc15
VIN = 12V
VIN = 24V
5.10
VIN = 12V
OUTPUT VOLTAGE (V)
VIN = 36V
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
VIN = 12V
0.5
MAX17632B
LOAD AND LINE REGULATION
FIGURE 4 CIRCUIT
5.15
5.01
toc12
VIN = 4.5V
VIN = 12V
3.36
VIN = 12V
3.29
MAX17632A
LOAD AND LINE REGULATION
FIGURE 3 CIRCUIT
3.40
3.31
3.31
3.29
toc11
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
3.32
MAX17632A
LOAD AND LINE REGULATION
FIGURE 3 CIRCUIT
VIN = 36V
5.05
5.00
4.95
4.90
4.85
4.98
4.98
0.0
1.0
1.5
2.0
LOAD CURRENT (A)
CONDITIONS: FIXED 5V OUTPUT, PWM MODE, fSW = 400kHz
MAX17632C
LOAD AND LINE REGULATION
FIGURE 7 CIRCUIT
3.32
toc16
0.0
4.80
1.0
1.5
2.0
LOAD CURRENT (A)
CONDITIONS: FIXED 5V OUTPUT, DCM MODE, fSW = 400kHz
0.5
0.5
MAX17632C
LOAD AND LINE REGULATION
FIGURE 7 CIRCUIT
3.32
1.0
1.5
2.0
LOAD CURRENT (A)
CONDITIONS: FIXED 5V OUTPUT, PFM MODE, fSW = 400kHz
toc17
0.0
MAX17632C
LOAD AND LINE REGULATION
FIGURE 7 CIRCUIT
3.40
VIN =
5.5V
3.29
3.28
0.00
VIN = 24V
0.50
VIN = 28V
1.00
1.50
2.00
LOAD CURRENT (A)
CONDITIONS: ADJUSTABLE 3.3V OUTPUT, PWM MODE, fSW = 1MHz
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3.31
VIN = 12V
3.30
3.29
3.28
VIN = 5.5V
VIN = 24V
VIN = 28V
OUTPUT VOLTAGE (V)
3.30
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
VIN = 12V
3.36
0.5
1.0
1.5
2.0
LOAD CURRENT (A)
CONDITIONS: ADJUSTABLE 3.3V OUTPUT, DCM MODE, fSW = 1MHz
VIN = 24V
3.34
3.32
VIN = 28V
3.30
3.28
0.0
toc18
VIN = 5.5V
VIN = 12V
3.38
3.31
0.5
0.0
0.5
1.0
1.5
2.0
LOAD CURRENT (A)
CONDITIONS: ADJUSTABLE 3.3V OUTPUT, PFM MODE, fSW = 1MHz
Maxim Integrated │ 7
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Typical Operating Characteristics (continued)
(VEN/UVLO = VIN = 24V, VSGND = VPGND = 0V, CVCC = 2.2μF, CBST = 0.1μF, CSS = 5600pF, TA = -40°C to +125°C, unless otherwise
noted. Typical values are at TA = +25°C. All voltages are referenced to SGND, unless otherwise noted.)
MAX17632B
SOFT-START/SHUTDOWN THROUGH EN/UVLO
FIGURE 4 CIRCUIT
MAX17632A
SOFT-START/SHUTDOWN THROUGH EN/UVLO
FIGURE 3 CIRCUIT
toc20
toc19
VEN/UVLO
5V/div
VOUT
2V/div
ILX
2A/div
5V/div
VRESET
5V/div
VOUT
2V/div
ILX
2A/div
VOUT
1V/div
5V/div
ILX
2A/div
VRESET
CONDITIONS: FIXED 5V OUTPUT,
PWM MODE, 2A LOAD, fSW = 400kHz
toc22
5V/div
VOUT
1V/div
1A/div
ILX
VRESET
MAX17632B
SOFT-START WITH PRE-BIAS VOLTAGE OF 2.5V
FIGURE 4 CIRCUIT
5V/div
VEN/UVLO
5V/div
VOUT
ILX
2V/div
1A/div
VRESET
CONDITIONS: FIXED 3.3V OUTPUT,
PWM MODE, 20mA LOAD, fSW = 400kHz
MAX17632A
STEADY STATE
FIGURE 3 CIRCUIT
toc25
20V/div
20mV/div
ILX
2A/div
2µs/div
CONDITIONS: FIXED 3.3V OUTPUT,
PWM MODE, 2A LOAD, fSW = 400kHz
www.maximintegrated.com
5V/div
1ms/div
CONDITIONS: FIXED 5V OUTPUT,
PWM MODE, 20mA LOAD, fSW = 400kHz
1ms/div
VLX
1µs/div
toc24
VEN/UVLO
5V/div
VOUT
ILX
1V/div
1A/div
VRESET
5V/div
MAX17632A
STEADY STATE
FIGURE 3 CIRCUIT
toc26
0.5A/div
CONDITIONS: FIXED 3.3V OUTPUT,
DCM MODE, 20mA LOAD, fSW = 400kHz
MAX17632C
SOFT-START WITH PRE-BIAS VOLTAGE OF 1.65V
FIGURE 7 CIRCUIT
CONDITIONS: ADJUSTABLE 3.3V OUTPUT,
PWM MODE, 20mA LOAD, fSW = 1MHz
20mV/div
ILX
5V/div
1ms/div
1ms/div
20V/div
VOUT(AC)
5V/div
CONDITIONS: ADJUSTABLE 3.3V OUTPUT,
PWM MODE, 2A LOAD, fSW = 1MHz
toc23
VEN/UVLO
VOUT(AC)
VEN/UVLO
VRESET
1ms/div
MAX17632A
SOFT-START WITH PRE-BIAS VOLTAGE OF 1.65V
FIGURE 3 CIRCUIT
VLX
toc21
VEN/UVLO
1ms/div
CONDITIONS: FIXED 3.3V OUTPUT,
PWM MODE, 2A LOAD, fSW = 400kHz
MAX17632A
STEADY STATE
FIGURE 3 CIRCUIT
MAX17632C
SOFT-START/SHUTDOWN THROUGH EN/UVLO
FIGURE 7 CIRCUIT
toc27
20V/div
VLX
VOUT(AC)
50mV/div
ILX
0.5A/div
40µs/div
CONDITIONS: FIXED 3.3V OUTPUT,
PFM MODE, 20mA LOAD, fSW = 400kHz
Maxim Integrated │ 8
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Typical Operating Characteristics (continued)
(VEN/UVLO = VIN = 24V, VSGND = VPGND = 0V, CVCC = 2.2μF, CBST = 0.1μF, CSS = 5600pF, TA = -40°C to +125°C, unless otherwise
noted. Typical values are at TA = +25°C. All voltages are referenced to SGND, unless otherwise noted.)
MAX17632B
STEADY STATE
FIGURE 4 CIRCUIT
MAX17632B
STEADY STATE
FIGURE 4 CIRCUIT
toc28
VLX
20V/div
VOUT(AC)
20mV/div
ILX
2A/div
toc29
VLX
20V/div
VOUT(AC)
20mV/div
ILX
0.5A/div
MAX17632C
STEADY STATE
FIGURE 5 CIRCUIT
toc31
VLX
20V/div
VOUT(AC)
20mV/div
ILX
2A/div
VOUT(AC)
20mV/div
ILX
0.5A/div
CONDITIONS: ADJUSTABLE 3.3V OUTPUT,
PWM MODE, 2A LOAD, fSW = 400kHz
CONDITIONS: ADJUSTABLE 3.3V OUTPUT,
DCM MODE, 20mA LOAD, fSW = 400kHz
toc34
VLX
20V/div
VOUT(AC)
20mV/div
ILX
2A/div
2µs/div
CONDITIONS: ADJUSTABLE 5V OUTPUT,
PWM MODE, 2A LOAD, fSW = 400kHz
0.5A/div
MAX17632C
STEADY STATE
FIGURE 5 CIRCUIT
20V/div
1µs/div
www.maximintegrated.com
ILX
toc32
VLX
MAX17632C
STEADY STATE
FIGURE 6 CIRCUIT
100mV/div
40µs/div
CONDITIONS: FIXED 5V OUTPUT,
PFM MODE, 20mA LOAD, fSW = 400kHz
2µs/div
MAX17632C
STEADY STATE
FIGURE 6 CIRCUIT
20V/div
VOUT(AC)
CONDITIONS: FIXED 5V OUTPUT,
DCM MODE, 20mA LOAD, fSW = 400kHz
CONDITIONS: FIXED 5V OUTPUT,
PWM MODE, 2A LOAD, fSW = 400kHz
toc30
VLX
1µs/div
2µs/div
MAX17632C
STEADY STATE
FIGURE 5 CIRCUIT
MAX17632B
STEADY STATE
FIGURE 4 CIRCUIT
VOUT(AC)
ILX
0.5A/div
1µs/div
CONDITIONS: ADJUSTABLE 5V OUTPUT,
DCM MODE, 20mA LOAD, fSW = 400kHz
0.5A/div
MAX17632C
STEADY STATE
FIGURE 6 CIRCUIT
20mV/div
ILX
50mV/div
40µs/div
CONDITIONS: ADJUSTABLE 3.3V OUTPUT,
PFM MODE, 20mA LOAD, fSW = 400kHz
20V/div
VOUT(AC)
20V/div
VLX
toc35
VLX
toc33
toc36
20V/div
VLX
VOUT(AC)
100mV/div
ILX
0.5A/div
40µs/div
CONDITIONS: ADJUSTABLE 5V OUTPUT,
PFM MODE, 20mA LOAD, fSW = 400kHz
Maxim Integrated │ 9
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Typical Operating Characteristics (continued)
(VEN/UVLO = VIN = 24V, VSGND = VPGND = 0V, CVCC = 2.2μF, CBST = 0.1μF, CSS = 5600pF, TA = -40°C to +125°C, unless otherwise
noted. Typical values are at TA = +25°C. All voltages are referenced to SGND, unless otherwise noted.)
MAX17632C
STEADY STATE
FIGURE 7 CIRCUIT
MAX17632C
STEADY STATE
FIGURE 7 CIRCUIT
toc37
VLX
20V/div
VOUT(AC)
20mV/div
ILX
2A/div
toc38
VLX
20V/div
20mV/div
VOUT(AC)
ILX
0.5A/div
VOUT(AC)
IOUT
0.5A/div
20µs/div
VOUT(AC)
MAX17632A
LOAD TRANSIENT BETWEEN 20mA AND 1A
FIGURE 3 CIRCUIT
100µs/div
CONDITIONS: FIXED 3.3V OUTPUT,
PWM MODE, fSW = 400kHz
toc42
50mV/div
IOUT
1A/div
VOUT(AC)
CONDITIONS: FIXED 3.3V OUTPUT,
DCM MODE, fSW = 400kHz
MAX17632B
LOAD TRANSIENT BETWEEN 0A AND 1A
FIGURE 4 CIRCUIT
MAX17632B
LOAD TRANSIENT BETWEEN 1A AND 2A
FIGURE 4 CIRCUIT
toc44
VOUT(AC)
0.5A/div
200µs/div
100µs/div
toc43
100mV/div
IOUT
CONDITIONS: FIXED 3.3V OUTPUT,
PWM MODE, fSW = 400kHz
MAX17632A
LOAD TRANSIENT BETWEEN 20mA AND 1A
FIGURE 3 CIRCUIT
0.5A/div
CONDITIONS: ADJUSTABLE 3.3V OUTPUT,
PFM MODE, 20mA LOAD, fSW = 1MHz
toc41
50mV/div
50mV/div
ILX
MAX17632A
LOAD TRANSIENT BETWEEN 1A AND 2A
FIGURE 3 CIRCUIT
toc40
20V/div
VOUT(AC)
CONDITIONS: ADJUSTABLE 3.3V OUTPUT,
DCM MODE, 20mA LOAD, fSW = 1MHz
MAX17632A
LOAD TRANSIENT BETWEEN 0A AND 1A
FIGURE 3 CIRCUIT
toc39
VLX
1µs/div
1µs/div
CONDITIONS: ADJUSTABLE 3.3V OUTPUT,
PWM MODE, 2A LOAD, fSW = 1MHz
VOUT(AC)
MAX17632C
STEADY STATE
FIGURE 7 CIRCUIT
toc45
100mV/div
VOUT(AC)
100mV/div
100mV/div
IOUT
0.5A/div
400µs/div
CONDITIONS: FIXED 3.3V OUTPUT,
PFM MODE, fSW = 400kHz
www.maximintegrated.com
IOUT
0.5A/div
100µs/div
CONDITIONS: FIXED 5V OUTPUT,
PWM MODE, fSW = 400kHz
IOUT
1A/div
100µs/div
CONDITIONS: FIXED 5V OUTPUT,
PWM MODE, fSW = 400kHz
Maxim Integrated │ 10
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Typical Operating Characteristics (continued)
(VEN/UVLO = VIN = 24V, VSGND = VPGND = 0V, CVCC = 2.2μF, CBST = 0.1μF, CSS = 5600pF, TA = -40°C to +125°C, unless otherwise
noted. Typical values are at TA = +25°C. All voltages are referenced to SGND, unless otherwise noted.)
MAX17632B
LOAD TRANSIENT BETWEEN 20mA AND 1A
FIGURE 4 CIRCUIT
MAX17632B
LOAD TRANSIENT BETWEEN 20mA AND 1A
FIGURE 4 CIRCUIT
toc46
VOUT(AC)
toc48
toc47
200mV/div
0.5A/div
IOUT
MAX17632C
LOAD TRANSIENT BETWEEN 1A AND 2A
FIGURE 5 CIRCUIT
VOUT(AC)
200mV/div
IOUT
0.5A/div
VOUT(AC)
IOUT
CONDITIONS: FIXED 5V OUTPUT,
DCM MODE, fSW = 400kHz
CONDITIONS: FIXED 5V OUTPUT,
PFM MODE, fSW = 400kHz
MAX17632C
LOAD TRANSIENT BETWEEN 1A AND 2A
FIGURE 6 CIRCUIT
MAX17632C
LOAD TRANSIENT BETWEEN 0A AND 1A
FIGURE 7 CIRCUIT
VOUT(AC)
MAX17632C
LOAD TRANSIENT BETWEEN 1A AND 2A
FIGURE 7 CIRCUIT
toc50
toc49
1A/div
100µs/div
CONDITIONS: ADJUSTABLE 3.3V OUTPUT,
PWM MODE, fSW = 400kHz
400µs/div
200µs/div
50mV/div
toc51
100mV/div
VOUT(AC)
IOUT
50mV/div
VOUT(AC)
50mV/div
1A/div
IOUT
100µs/div
0.5A/div
100µs/div
IOUT
1A/div
100µs/div
CONDITIONS: ADJUSTABLE 5V OUTPUT,
PWM MODE, fSW = 400kHz
CONDITIONS: ADJUSTABLE 3.3V OUTPUT,
PWM MODE, fSW = 1MHz
CONDITIONS: ADJUSTABLE 3.3V OUTPUT,
PWM MODE, fSW = 1MHz
MAX17632C
LOAD TRANSIENT BETWEEN 20mA AND 1A
FIGURE 7 CIRCUIT
MAX17632C
LOAD TRANSIENT BETWEEN 20mA AND 1A
FIGURE 7 CIRCUIT
MAX17632A
OVERLOAD PROTECTION
FIGURE 3 CIRCUIT
toc53
toc52
VOUT(AC)
VOUT(AC)
100mV/div
100mV/div
0.5A/div
IOUT
200µs/div
CONDITIONS: ADJUSTABLE 3.3V OUTPUT,
DCM MODE, fSW = 1MHz
www.maximintegrated.com
toc54
IOUT
0.5A/div
400µs/div
CONDITIONS: ADJUSTABLE 3.3V OUTPUT,
PFM MODE, fSW = 1MHz
VOUT
0.5V/div
ILX
2A/div
20ms/div
CONDITIONS: FIXED 3.3V OUTPUT,
PWM MODE, 4A LOAD, fSW = 400kHz
Maxim Integrated │ 11
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Typical Operating Characteristics (continued)
(VEN/UVLO = VIN = 24V, VSGND = VPGND = 0V, CVCC = 2.2μF, CBST = 0.1μF, CSS = 5600pF, TA = -40°C to +125°C, unless otherwise
noted. Typical values are at TA = +25°C. All voltages are referenced to SGND, unless otherwise noted.)
MAX17632B
OVERLOAD PROTECTION
FIGURE 4 CIRCUIT
MAX17632C
OVERLOAD PROTECTION
FIGURE 7 CIRCUIT
toc55
VOUT
0.5V/div
MAX17632A
EXTERNAL CLOCK SYNCHRONIZATION
FIGURE 3 CIRCUIT
toc57
toc56
VOUT
0.5V/div
VLX
20V/div
VSYNC
5V/div
VOUT(AC)
ILX
2A/div
ILX
2A/div
10ms/div
CONDITIONS: ADJUSTABLE 3.3V OUTPUT,
PWM MODE, 4A LOAD, fSW = 1MHz
MAX17632B
EXTERNAL CLOCK SYNCHRONIZATION
FIGURE 4 CIRCUIT
toc60
toc59
VLX
20V/div
VLX
20V/div
VSYNC
5V/div
VSYNC
5V/div
50mV/div
ILX
2A/div
CONDITIONS: FIXED 3.3V OUTPUT,
PWM MODE, 2A LOAD, fSW = 440kHz
MAX17632B
EXTERNAL CLOCK SYNCHRONIZATION
FIGURE 4 CIRCUIT
toc58
VOUT(AC)
ILX
2µs/div
20ms/div
CONDITIONS: FIXED 5V OUTPUT,
PWM MODE, 4A LOAD, fSW = 400kHz
MAX17632A
EXTERNAL CLOCK SYNCHRONIZATION
FIGURE 3 CIRCUIT
50mV/div
2A/div
VOUT(AC)
50mV/div
ILX
2A/div
2µs/div
CONDITIONS: FIXED 3.3V OUTPUT,
PWM MODE, 2A LOAD, fSW = 560kHz
VLX
20V/div
VSYNC
5V/div
VOUT(AC)
50mV/div
ILX
2A/div
2µs/div
2µs/div
CONDITIONS: FIXED 5V OUTPUT,
PWM MODE, 2A LOAD, fSW = 440kHz
CONDITIONS: FIXED 5V OUTPUT,
PWM MODE, 2A LOAD, fSW = 560kHz
MAX17632C
EXTERNAL CLOCK SYNCHRONIZATION
FIGURE 7 CIRCUIT
MAX17632C
EXTERNAL CLOCK SYNCHRONIZATION
FIGURE 7 CIRCUIT
toc61
toc62
VLX
20V/div
VLX
20V/div
VSYNC
5V/div
VSYNC
5V/div
VOUT(AC)
20mV/div
ILX
2A/div
1µs/div
CONDITIONS: ADJUSTABLE 3.3V OUTPUT,
PWM MODE, 2A LOAD, fSW = 1.1MHz
www.maximintegrated.com
VOUT(AC)
20mV/div
ILX
2A/div
1µs/div
CONDITIONS: ADJUSTABLE 3.3V OUTPUT,
PWM MODE, 2A LOAD, fSW = 1.4MHz
Maxim Integrated │ 12
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Typical Operating Characteristics (continued)
(VEN/UVLO = VIN = 24V, VSGND = VPGND = 0V, CVCC = 2.2μF, CBST = 0.1μF, CSS = 5600pF, TA = -40°C to +125°C, unless otherwise
noted. Typical values are at TA = +25°C. All voltages are referenced to SGND, unless otherwise noted.)
0
0
GAIN
-20
-60
1k
-60
10k
100k
FREQUENCY (Hz)
-90
CONDITIONS: FIXED 3.3V OUTPUT, PWM MODE, 2A LOAD, fSW = 400kHz
GAIN (dB)
60
20
30
0
0
-20
-30
-40
-60
GAIN CROSSOVER FREQUENCY = 46kHz
PHASE MARGIN = 64.8°
-60
-80
toc66
PHASE
120
60
20
30
0
0
GAIN
-40
GAIN CROSSOVER FREQUENCY = 43kHz
PHASE MARGIN = 69.5°
0
GAIN CROSSOVER FREQUENCY = 41kHz
PHASE MARGIN = 64.2°
-40
-60
-30
GAIN
1k
10k
100k
FREQUENCY (Hz)
CONDITIONS: ADJUSTABLE 3.3V OUTPUT,
PWM MODE, 2A LOAD, fSW = 400kHz
MAX17632C
BODE PLOT
FIGURE 7 CIRCUIT
toc67
PHASE
40
1k
10k
100k
FREQUENCY (Hz)
CONDITIONS: ADJUSTABLE 5V OUTPUT,
PWM MODE, 2A LOAD, fSW = 400kHz
-120
-60
-90
-120
120
90
60
20
30
0
0
GAIN
-30
-20
-90
90
30
0
-60
-60
-80
-30
20
-20
-90
60
90
120
60
1k
40
-20
40
-120
10k
100k
FREQUENCY (Hz)
CONDITIONS: FIXED 5V OUTPUT, PWM MODE, 2A LOAD, fSW = 400kHz
MAX17632C
BODE PLOT
FIGURE 6 CIRCUIT
80
60
GAIN
-30
CROSSOVER FREQUENCY = 39.9kHz
PHASE MARGIN = 63.9°
-40
90
40
toc65
PHASE
PHASE (°)
30
60
120
60
MAX17632C
BODE PLOT
FIGURE 5 CIRCUIT
PHASE (°)
20
GAIN (dB)
60
PHASE (°)
GAIN (dB)
40
toc64
PHASE
GAIN (dB)
80
PHASE (°)
90
PHASE
GAIN (dB)
toc63
60
MAX17632B
BODE PLOT
FIGURE 4 CIRCUIT
PHASE (°)
MAX17632A
BODE PLOT
FIGURE 3 CIRCUIT
-60
-40
-60
GAIN CROSSOVER FREQUENCY = 83.5kHz
PHASE MARGIN = 61°
1k
10k
100k
FREQUENCY (Hz)
CONDITIONS: ADJUSTABLE 3.3V OUTPUT,
PWM MODE, 2A LOAD, fSW = 1MHz
-90
-120
TUV Rheinland
Final_ScanV
MaximIC_MAX17632
Final_ScanH
MAX17632C, 5V OUTPUT, 2A LOAD CURRENT
RE 30MHz-1GHz
Limit
RADIATED EMISSIONS PLOT
toc69
70
70.0
Am
p litu d e (d
Bu V /m )
MAGNITUDE
(dBµV/m)
60.0
60
50.0
50
40.0
40
30.0
30
CISPR-22 CLASS B QP LIMIT
20.0
20
HORIZONTAL SCAN
10.0
10
00
-10.0
-10
30.0M
30
VERTICAL SCAN
100.0M
100
FREQUENCY
Frequency
(Hz) (MHz)
MEASURED
ON Height_Quick
MAX17632C5EVKITE#
RE 30MHz-1GHz_0-360deg_90deg step_1-4mtr
Scan_Test3.TIL
1.0G
1000
01:26:38 PM, Wednesday, November 28, 2018
www.maximintegrated.com
Maxim Integrated │ 13
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Pin Configuration
TOP VIEW
VIN
15
VIN
16
EN/UVLO
1
VCC
2
SGND
3
MODE/SYNC
4
PGND PGND
14
13
12 LX
EP
11 LX
MAX17632A
MAX17632B
MAX17632C
10 BST
9 EXTVCC
5
SS
6
FB
7
RT
8
RESET
16-PIN TQFN 3mm × 3mm
Pin Description
PIN
1
NAME
FUNCTION
Enable/Undervoltage Lockout Pin. Drive EN/UVLO high to enable the output. Connect to the center of the
EN/UVLO resistor-divider between VIN and SGND to set the input voltage at which the part turns on. Connect to VIN pins
for always on operation. Pull low (lower than VENF) for disabling the device.
5V LDO Output. Bypass VCC with a 2.2μF ceramic capacitance to SGND. LDO does not support the external
loading on VCC.
2
VCC
3
SGND
Analog Ground
4
MODE/
SYNC
MODE/SYNC Pin Configures the Device to Operate either in PWM, PFM or DCM Modes of Operation. Leave
MODE/SYNC open for PFM operation (pulse skipping at light loads). Connect MODE/SYNC to SGND for
constant-frequency PWM operation at all loads. Connect MODE/SYNC to VCC for DCM operation at light loads.
The device can be synchronized to an external clock using this pin. See the Mode Selection and External Clock
Synchronization (MODE/SYNC) section for more details.
5
SS
Soft-Start Input. Connect a capacitor from SS to SGND to set the soft-start time.
6
FB
Feedback Input. Connect the output voltage node (VOUT) to FB for MAX17632A and MAX17632B. Connect
FB to the center node of an external resistor-divider from the output to SGND to set the output voltage for
MAX17632C. See the Adjusting Output Voltage section for more details.
7
RT
Programmable Switching Frequency Input. Connect a resistor from RT to SGND to set the regulator’s switching
frequency between 400kHz and 2.2MHz. Leave RT open for the default 400kHz frequency. See the Setting the
Switching Frequency (RT) section for more details.
8
RESET
Open-Drain RESET Output. The RESET output is driven low if FB drops below 92% of its set value. RESET
goes high 1024 cycles after FB rises above 95% of its set value.
9
EXTVCC
10
BST
11, 12
LX
13, 14
PGND
15, 16
VIN
Power-Supply Input Pins. 4.5V to 36V input-supply range. Decouple to PGND with a 2.2μF capacitor; place the
capacitor close to the VIN and PGND pins.
-
EP
Exposed Pad. Always connect EP to the SGND pin of the IC. Also, connect EP to a large SGND plane with
several thermal vias for best thermal performance. Refer to the MAX17632 EVKit data sheet for an example of
the correct method for EP connection and thermal vias.
External Power Supply Input Reduces the Internal-LDO loss. Connect it to buck output when it is programmed
to 5V only. When EXTVCC is not used, connect it to SGND.
Boost Flying Capacitor. Connect a 0.1μF ceramic capacitor between BST and LX.
Switching Node Pins. Connect LX pins to the switching side of the inductor.
Power Ground Pins of the Converter. Connect externally to the power ground plane. Refer to the MAX17632
Evaluation Kit data sheet for a layout example.
www.maximintegrated.com
Maxim Integrated │ 14
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Functional Diagram
MAX17632A/MAX17632B/MAX17632C
EXTVCC
5V
VCC
BST
LDO
VIN
SGND
CURRENT- SENSE
LOGIC
EN/UVLO
1.215V
RT
ENOK
PWM/PFM/
HICCUP
LOGIC
LX
HICCUP
OSCILLATOR
SYNC
PGND
*S1
FB
R1
*S2
*S3
R2
THERMAL
SHUTDOWN
ERROR AMPLIFIER/
LOOP COMPENSATION
MODE
SELECTION
LOGIC
SWITCHOVER LOGIC
VCC
SLOPE
COMPENSATION
SS
5μA
HICCUP
FB
SYNC
MODE/SYNC
RESET
ENOK
RESET
LOGIC
*S1 - CLOSE, *S2, *S3 - OPEN FOR MAX17632C
*S1 - OPEN, *S2, *S3 - CLOSE FOR MAX17632A/MAX17632B
R1 - 246.24kΩ, R2 - 54kΩ FOR MAX17632B
R1 - 115.2kΩ, R2 - 43.2kΩ FOR MAX17632A
www.maximintegrated.com
Maxim Integrated │ 15
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Detailed Description
The MAX17632 is a high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated
MOSFETs operating over an input-voltage range of 4.5V
to 36V. It can deliver up to 2A current. MAX17632A and
MAX17632B are fixed 3.3V and fixed 5V output parts,
respectively. MAX17632C is the adjustable output voltage
(0.9V to 90% of VIN) part. Built-in compensation across
the output-voltage range eliminates the need for external compensation components. The feedback-voltage
regulation accuracy over -40°C to +125°C is ±1.2% for
MAX17632A/MAX17632B/MAX17632C.
The device features a peak-current-mode control architecture. An internal transconductance error amplifier
produces an integrated error voltage at an internal node,
which sets the duty cycle using a PWM comparator, a
high-side current-sense amplifier, and a slope-compensation generator. At each rising edge of the clock, the
high-side MOSFET turns on and remains on until either
the appropriate or maximum duty cycle is reached, or
the peak current limit is detected. During the high-side
MOSFET’s on-time, the inductor current ramps up. During
the second half of the switching cycle, the high-side
MOSFET turns off and the low-side MOSFET turns on.
The inductor releases the stored energy as its current
ramps down and provides current to the output.
The device features a MODE/SYNC pin that can be used
to operate the device in PWM, or PFM, or DCM control
modes. The device also features adjustable-input undervoltage lockout, adjustable soft-start, open-drain RESET,
and external frequency synchronization features. The
MAX17632 offers a low minimum on-time that enables to
design the converter at high switching frequencies and a
small solution size.
Mode Selection and External Clock
Synchronization (MODE/SYNC)
The MAX17632 supports PWM, PFM, and DCM mode
of operation. The device enters the required mode of
operation based on the setting of the MODE/SYNC pin
detected within 1.5ms after VCC and EN/UVLO voltages
exceed their respective UVLO rising thresholds (VCC_
UVR, VENR). If the MODE/SYNC pin is open, the device
operates in PFM mode at light loads. If the state of the
MODE/SYNC pin is low (< VM-PWM), the device operates
in constant-frequency PWM mode at all loads. If the state
of the MODE/ SYNC pin is high (> VM-DCM), the device
operates in DCM mode at light loads.
During external clock synchronization, the device operates in PWM mode irrespective of the detected mode
www.maximintegrated.com
of operation. When 16 external clock rising edges are
detected on the MODE/SYNC pin, the internal oscillator
frequency set by the RT pin (fSW) changes to the external
clock frequency, and the device transitions to PWM mode.
The device remains in PWM mode until EN/UVLO or input
power is cycled. The external clock frequency must be
between 1.1 x fSW and 1.4 x fSW. The minimum external clock pulse width should be greater than 50ns. The
off-time duration of the external clock should be at least
160ns. See the MODE/SYNC section in the Electrical
Characteristics table for details.
PWM Mode Operation
In PWM mode, the inductor current is allowed to go negative. PWM operation provides constant frequency operation at all loads, and is useful in applications sensitive to
switching frequency. However, the PWM mode of operation gives lower efficiency at light loads compared to PFM
and DCM modes of operation.
PFM Mode Operation
PFM mode of operation disables negative inductor current and additionally skips pulses at light loads for high
efficiency. In PFM mode, the inductor current is forced to
a fixed peak of IPFM (800mA (typ)) every clock cycle until
the output rises to 102.3% of the set nominal output voltage. Once the output reaches 102.3% of the set nominal
output voltage, both the high-side and low-side FETs are
turned off and the device enters hibernate operation until
the load discharges the output to 101.1% of the set nominal output voltage. Most of the internal blocks are turned
off in hibernate operation to save quiescent current. After
the output falls below 101.1% of the set nominal output
voltage, the device comes out of hibernate operation,
turns on all internal blocks, and again commences the
process of delivering pulses of energy to the output until
it reaches 102.3% of the set nominal output voltage. The
advantage of the PFM mode is higher efficiency at light
loads because of lower quiescent current drawn from
supply. The disadvantage is that the output-voltage ripple
is higher compared to PWM or DCM modes of operation
and switching frequency is not constant at light loads.
DCM Mode Operation
DCM mode of operation features constant frequency
operation down to lighter loads than PFM mode, not
by skipping pulses, but by disabling negative inductor
current at light loads. DCM operation offers efficiency
performance that lies between PWM and PFM modes.
The output-voltage ripple in DCM mode is comparable to
PWM mode and relatively lower compared to PFM mode.
Maxim Integrated │ 16
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Linear Regulator (VCC and EXTVCC)
The MAX17632 has an internal low dropout (LDO) regulator that powers VCC from VIN. This LDO is enabled during
power-up or when EN/UVLO is recycled. When VCC is
above its UVLO, if EXTVCC is greater than 4.7V (typ),
internal VCC is powered by EXTVCC and LDO is disabled from VIN. Powering VCC from EXTVCC increases
efficiency at higher input voltages. The typical VCC output
voltage is 5V. Bypass VCC to SGND with a 2.2μF lowESR ceramic capacitor. VCC powers the internal blocks
and the low-side MOSFET driver and recharges the external bootstrap capacitor.
The MAX17632 employs an undervoltage-lockout circuit that forces the buck converter off when VCC falls
below VCC_UVF. The buck converter can be immediately
enabled again when VCC > VCC_UVR. The 400mV UVLO
hysteresis prevents chattering on power-up/power-down.
In applications where the buck-converter output is connected to the EXTVCC pin, if the output is shorted to
ground, then the transfer from EXTVCC to internal LDO
happens seamlessly without any impact to the normal
functionality. Connect EXTVCC pin to SGND, when not
in use.
Setting the Switching Frequency (RT)
The switching frequency of the device can be programmed from 400kHz to 2.2MHz by using a resistor connected from the RT pin to SGND. The switching frequency
(fSW) is related to the resistor connected at the RT pin
(RRT) by the following equation:
R RT =
21000
-1.7
f SW
Where RRT is in kΩ and fSW is in kHz. Leaving the RT pin
open makes the device operate at the default switching
frequency of 400kHz. See Table 1 for RT resistor values
for a few common switching frequencies.
Table 1. Switching Frequency vs. RT Resistor
SWITCHING FREQUENCY
(KHZ)
RT RESISTOR (KΩ)
400
Open
400
50.8
500
40.2
2200
8.06
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Operating Input-Voltage Range
The minimum and maximum operating input voltages for
a given output voltage setting should be calculated as
follows:
VIN(MIN) =
(
(
VOUT + I OUT(MAX) × R DCR(MAX) +R DS-ONL(MAX)
(
(
1 - f SW(MAX) × t OFF-MIN(MAX)
)
(
+ I OUT(MAX) × R DS-ONH(MAX) - R DS-ONL(MAX)
VIN(MAX) =
))
))
VOUT
f SW(MAX) × t ON-MIN(MAX)
where:
VOUT = Steady-state output voltage
IOUT(MAX) = Maximum load current
RDCR(MAX) = Worst-case DC resistance of the inductor
fSW(MAX) = Maximum switching frequency
tOFF-MIN(MAX) = Worst-case minimum switch off-time
(160ns)
tON-MIN(MAX) = Worst-case minimum switch on-time
(80ns)
RDS-ONL(MAX) and RDS-ONH(MAX) = Worst-case onstate resistances of low-side and high-side internal
MOSFETs, respectively.
Overcurrent Protection (OCP)/Hiccup Mode
The device is provided with a robust overcurrent-protection
(OCP) scheme that protects the device under overload
and output short-circuit conditions. A cycle-by-cycle peak
current limit turns off the high-side MOSFET whenever the
high-side switch current exceeds an internal limit of IPEAKLIMIT (3.15A (typ)). A runaway peak current limit on the
high-side switch current at IRUNAWAY-LIMIT (3.6A (typ))
protects the device under high input voltage, short-circuit
conditions when there is insufficient output voltage available to restore the inductor current that built up during the
on period of the step-down converter. One occurrence of
the runaway current limit triggers a hiccup mode. In addition, if, due to a fault condition, feedback voltage drops to
VFB-HICF any time after soft-start is complete and hiccup
mode is triggered. In hiccup mode, the converter is protected by suspending switching for a hiccup timeout period
of 32,768 clock cycles of half the programmed switching frequency. Once the hiccup timeout period expires,
soft-start is attempted again. Note that when soft-start is
attempted under overload condition, if feedback voltage
Maxim Integrated │ 17
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
does not exceed VFB-HICF, the device continues to switch
at half the programmed switching frequency for the time
duration of the programmed soft-start time and 1024 clock
cycles. Hiccup mode of operation ensures low power dissipation under output short-circuit conditions.
RESET Output
The device includes a RESET comparator to monitor the
status of the output voltage. The open-drain RESET output requires an external pullup resistor. RESET goes high
(high impedance) 1024 switching cycles after the regulator output increases above 95% of the designed nominal
regulated voltage. RESET goes low when the regulator
output voltage drops to below 92% of the set nominal
output voltage. RESET also goes low during thermal
shutdown or when the EN/UVLO pin goes below VENF.
where, IOUT(MAX) is the maximum load current. IRMS has
a maximum value when the input voltage equals twice the
output voltage (VIN = 2 x VOUT), so
IRMS(MAX) =
Thermal-Shutdown Protection
Thermal-shutdown protection limits junction temperature
of the device. When the junction temperature of the device
exceeds +165ºC, an on-chip thermal sensor shuts down
the device, allowing the device to cool. The thermal sensor
turns the device on again after the junction temperature
cools by 10ºC. During thermal shutdown, soft-start deasserts; when the device recovers from thermal shutdown,
soft-start initiates startup operation. Carefully evaluate the
total power dissipation (see the Power Dissipation section)
to avoid unwanted triggering of the thermal shutdown during normal operation.
Applications Information
Input Capacitor Selection
C IN =
I OUT(MAX) × D × (1- D)
IRMS = I OUT(MAX) ×
www.maximintegrated.com
η × f SW × ∆VIN
where:
D = VOUT/VIN is the duty ratio of the converter
fSW = Switching frequency
ΔVIN = Allowable input-voltage ripple
η = Efficiency
In applications where the source is located distant from
the device input, an appropriate electrolytic capacitor
should be added in parallel to the ceramic capacitor
to provide necessary damping for potential oscillations
caused by the inductance of the longer input power path
and input ceramic capacitor.
Inductor Selection
Three key inductor parameters must be specified for
operation with the device: inductance value (L), inductor
saturation current (ISAT) and DC resistance (RDCR). The
switching frequency and output voltage determine the
inductor value as follows:
For PWM/DCM mode, L =
For PFM mode, L =
The input filter capacitor reduces peak currents drawn
from the power source and reduces noise and voltage
ripple on the input caused by the circuit’s switching.
The input capacitor RMS current requirement (IRMS) is
defined by the following equation:
VOUT × (VIN - VOUT )
VIN
2
Choose an input capacitor that exhibits less than +10°C
temperature rise at the RMS input current for optimal
long-term reliability. Use low-ESR ceramic capacitors with
high-ripple-current capability at the input. X7R capacitors
are recommended in industrial applications for their temperature stability. Calculate the input capacitance using
the following equation:
Prebiased Output
When the device starts into a prebiased output, both the
high-side and the low-side switches are turned off so that
the converter does not sink current from the output. Highside and low-side switches do not start switching until
the PWM comparator commands the first PWM pulse, at
which point switching commences. The output voltage is
then smoothly ramped up to the target value in alignment
with the internal reference.
I OUT(MAX)
VOUT
1.25 × f SW
VOUT
0.833 × f SW
where VOUT and fSW are nominal values and fSW is in
Hz. Select an inductor whose value is nearest to the value
calculated by the previous formula. Select a low-loss
inductor closest to the calculated value with acceptable
dimensions and having the lowest possible DC resistance. The saturation current rating (ISAT) of the inductor
must be high enough to ensure that saturation can occur
only above the peak current-limit value of IPEAK-LIMIT.
Maxim Integrated │ 18
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Output-Capacitor Selection
X7R ceramic output capacitors are preferred due to their
stability over temperature in industrial applications. The
output capacitors are usually sized to support a step load
of 50% of the maximum output current in the application,
so the output-voltage deviation is contained to 3% of the
output-voltage change. The minimum required output
capacitance can be calculated as follows:
×t
1 I
C OUT = × STEP RESPONSE
2
∆VOUT
t RESPONSE ≅
0.33
fC
where:
ISTEP = Load current step
tRESPONSE = Response time of the controller
ΔVOUT = Allowable output-voltage deviation
fC = Target closed-loop crossover frequency
VIN
R1
EN/UVLO
R2
SGND
Figure 1. Setting the Input Undervoltage Lockout
Setting the Input Undervoltage-Lockout Level
The device offers an adjustable input undervoltage-lockout level. Set the voltage at which the device turns on with
a resistive voltage-divider connected from VIN to SGND.
Connect the center node of the divider to EN/UVLO.
Choose R1 to be 3.3MΩ and then calculate R2 as follows:
R2 =
fSW = Switching frequency.
Select fC to be 1/10th of fSW if the switching frequency is
less than or equal to 800kHz. If the switching frequency
is more than 800kHz, select fC to be 80kHz. Actual derating of ceramic capacitors with DC-bias voltage must be
considered while selecting the output capacitor. Derating
curves are available from all major ceramic capacitor
manufacturers.
Soft-Start Capacitor Selection
The device implements adjustable soft-start operation to
reduce inrush current. A capacitor connected from the SS
pin to SGND programs the soft-start time. The selected
output capacitance (CSEL) and the output voltage (VOUT)
determine the minimum required soft-start capacitor as
follows:
C SS ≥ 28 × 10 -6 × C SEL × VOUT
The soft-start time (tSS) is related to the capacitor connected at SS (CSS) by the following equation:
t SS =
C SS
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where VINU is the input-voltage level at which the device
is required to turn on. Ensure that VINU is higher than
0.8 x VOUT to avoid hiccup during slow power up (slower
than soft-start) and power down. If the EN/UVLO pin is
driven from an external signal source, a series resistance
of minimum 1kΩ is recommended to be placed between
the output pin of signal source and the EN/UVLO pin, to
reduce voltage ringing on the line.
Adjusting Output Voltage
Set the output voltage with a resistive voltage-divider
connected from the output-voltage node (VOUT) to SGND
(see Figure 2). Connect the center node of the divider to
the FB pin for MAX17632C. Connect output voltage node
(VOUT) to FB pin for MAX17632A and MAX17632B. Use
the following procedure to choose the resistive voltagedivider values:
Calculate resistor R6 from the output to the FB pin as
follows:
R6 =
5.55 × 10 -6
For example, to program a 1ms soft-start time, a 5.6nF
capacitor should be connected from the SS pin to SGND.
Note that during start-up, the device operates at half the
programmed switching frequency until the output voltage
reaches 64.4% of set output nominal voltage.
R1 × 1.215
(VINU - 1.215)
216
(f C × C OUT_SEL )
where:
R6 is in kΩ
fC = Crossover frequency is in Hz
COUT_SEL = Actual capacitance of selected output
capacitor at DC-bias voltage in F.
Maxim Integrated │ 19
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
If the application has a thermal-management system that
ensures that the exposed pad of the device is maintained
at a given temperature (TEP(MAX)) by using proper heat
sinks, then the junction temperature of the device can be
estimated at any given maximum ambient temperature as:
VOUT
R6
FB
TJ(MAX) = TEP(MAX) +(θ JC × PLOSS )
R7
Note: Junction temperatures greater than +125°C
degrades operating lifetimes.
SGND
PCB Layout Guidelines
Figure 2. Setting the Output Voltage
Calculate resistor R7 from the FB pin to SGND as follows:
R7 =
R6 × 0.9
- 0.9)
(VOUT
R7 is in kΩ.
Power Dissipation
At a particular operating condition, the power losses that
lead to temperature rise of the part are estimated as follows:
(
1
PLOSS = POUT × -1 - I OUT 2 × R DCR
η
)
POUT = VOUT x I OUT
where:
POUT = Output power
η = Efficiency of the converter
RDCR = DC resistance of the inductor (see the Typical
Operating Characteristics for more information on efficiency at typical operating conditions).
For a typical multilayer board, the thermal performance
metrics for the package are given below:
θJA = 38°C/W
θJC = 10°C/W
The junction temperature of the device can be estimated
at any given maximum ambient temperature (TA(MAX))
from the following equation:
All connections carrying pulsed currents must be very
short and as wide as possible. The inductance of these
connections must be kept to an absolute minimum due to
the high di/dt of the currents. Since inductance of a current-carrying loop is proportional to the area enclosed by
the loop, if the loop area is made very small, inductance
is reduced. Additionally, small-current loop areas reduce
radiated EMI.
A ceramic input filter capacitor should be placed close
to the VIN pins of the IC. This eliminates as much trace
inductance effects as possible and gives the IC a cleaner
voltage supply. A bypass capacitor for the VCC pin also
should be placed close to the pin to reduce effects of trace
impedance.
When routing the circuitry around the IC, the analog small
signal ground and the power ground for switching currents must be kept separate. They should be connected
together at a point where switching activity is minimum.
This helps keep the analog ground quiet. The ground
plane should be kept continuous (unbroken) as far as
possible. No trace carrying high switching current should
be placed directly over any ground plane discontinuity.
PCB layout also affects the thermal performance of the
design. A number of thermal throughputs that connect to a
large ground plane should be provided under the exposed
pad of the part, for efficient heat dissipation.
For a sample layout that ensures first pass success, refer
to the MAX17632 evaluation kit layout available at www.
maximintegrated.com.
TJ(MAX) = T A(MAX) +(θ JA × PLOSS )
www.maximintegrated.com
Maxim Integrated │ 20
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Typical Application Circuits
Typical Application Circuit — Fixed 3.3V Output
EN/UVLO
VIN
VIN
RT
BST
C5
0.1μF
MODE/SYNC
LX
VCC
C3
2.2μF
VIN
4.5V TO 36V
C1
2.2μF
MAX17632A
SGND
LX
RESET
FB
SS
PGND
L1
6.8μH
C4
22μF
C5
22μF
VOUT
3.3V, 2A
C1: GRM31CR71H225KA88
L1: XAL5050-682ME FOR PWM/DCM MODE,
XAL5050-103ME FOR PFM MODE
C4,C5: GRM32ER71A226K
fSW : 400kHz
PWM MODE: CONNECT MODE/SYNC WITH SGND
DCM MODE: CONNECT MODE/SYNC WITH VCC
PFM MODE: LEAVE MODE/SYNC OPEN
EXTVCC
PGND
EP
C2
5600pF
Figure 3. Fixed 3.3V Output with 400kHz Switching Frequency
Typical Application Circuit — Fixed 5V Output
EN/UVLO
VIN
VIN
RT
BST
MODE/SYNC
LX
VCC
C3
2.2μF
C5
0.1μF
MAX17632B
SGND
LX
RESET
FB
SS
VIN
6.5V TO 36V
C1
2.2μF
PGND
C2
5600pF
PGND
L1
10μH
C4
22μF
VOUT
5V, 2A
C1: GRM31CR71H225KA88
L1: XAL5050-103ME FOR PWM/DCM MODE,
XAL6060-153ME FOR PFM MODE
C4: GRM32ER71A226K
fSW : 400kHz
PWM MODE: CONNECT MODE/SYNC WITH SGND
DCM MODE: CONNECT MODE/SYNC WITH VCC
PFM MODE: LEAVE MODE/SYNC OPEN
EXTVCC
EP
Figure 4. Fixed 5V Output with 400kHz Switching Frequency
www.maximintegrated.com
Maxim Integrated │ 21
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Typical Application Circuits (continued)
Typical Application Circuit — Adjustable 3.3V Output
VIN
EN/UVLO
VIN
C1
2.2μF
VIN
RT
BST
C5
0.1μF
MODE/SYNC
LX
VCC
C3
2.2μF
4.5V TO 36V
MAX17632C
SGND
LX
RESET
FB
SS
PGND
PGND
L1
6.8μH
C4
22μF
VOUT
3.3V, 2A
C5
22μF
R1
121kΩ
C1: GRM31CR71H225KA88
L1: XAL5050-682ME FOR PWM/DCM MODE,
XAL5050-103ME FOR PFM MODE
C4,C5: GRM32ER71A226K
fSW : 400kHz
PWM MODE: CONNECT MODE/SYNC WITH SGND
DCM MODE: CONNECT MODE/SYNC WITH VCC
PFM MODE: LEAVE MODE/SYNC OPEN
R2
44.2kΩ
EXTVCC
EP
C2
5600pF
Figure 5. Adjustable 3.3V Output with 400kHz Switching Frequency
Typical Application Circuit — Adjustable 5V Output
EN/UVLO
VIN
VIN
RT
BST
MODE/SYNC
LX
VCC
C3
2.2μF
MAX17632C
SGND
LX
RESET
FB
SS
VIN
6.5V TO 36V
C1
2.2μF
PGND
C2
5600pF
PGND
C5
0.1μF
L1
10μH
EXTVCC
C4
22μF
R1
243kΩ
VOUT
5V, 2A
C1: GRM31CR71H225KA88
L1: XAL5050-103ME FOR PWM/DCM MODE,
XAL6060-153ME FOR PFM MODE
C4: GRM32ER71A226K
fSW : 400kHz
PWM MODE: CONNECT MODE/SYNC WITH SGND
DCM MODE: CONNECT MODE/SYNC WITH VCC
PFM MODE: LEAVE MODE/SYNC OPEN
R2
52.3kΩ
EP
Figure 6. Adjustable 5V Output with 400kHz Switching Frequency
www.maximintegrated.com
Maxim Integrated │ 22
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Typical Application Circuit — Adjustable 3.3V Output with High Frequency (1MHz) Design
VIN
EN/UVLO
R1
19.1kΩ
BST
MODE/SYNC
LX
VCC
C3
2.2μF
VIN
RT
C5
0.1μF
MAX17632C
SGND
LX
RESET
FB
SS
VIN
5.5V TO 28V
C1
1μF
PGND
PGND
L1
3.3μH
C4
22μF
EXTVCC
VOUT
3.3V, 2A
R2
121kΩ
C1: GRM21BR71H105KA12
L1: XAL4030-332ME FOR PWM/DCM MODE,
XAL4030-472ME FOR PFM MODE
C4: GRM32ER71A226K
fSW : 1MHz
PWM MODE: CONNECT MODE/SYNC WITH SGND
DCM MODE: CONNECT MODE/SYNC WITH VCC
PFM MODE: LEAVE MODE/SYNC OPEN
R3
45.3kΩ
EP
C2
5600pF
Figure 7. Adjustable 3.3V Output with 1MHz Switching Frequency
Ordering Information
PART NUMBER
OUTPUT
VOLTAGE (V)
PIN-PACKAGE
MAX17632AATE+
3.3
16 TQFN 3mm x 3mm
MAX17632BATE+
5
16 TQFN 3mm x 3mm
MAX17632CATE+
Adjustable
16 TQFN 3mm x 3mm
+Denotes a lead(Pb)-free/RoHS compliant package.
www.maximintegrated.com
Maxim Integrated │ 23
MAX17632
4.5V to 36V, 2A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Revision History
REVISION
NUMBER
REVISION
DATE
0
9/17
Initial release
6/18
Updated the General Description, Pin Description, Detailed Description, Mode
Selection and External Synchronization (MODE/SYNC), Linear Regulator (VCC and
EXTVCC), RESET Output, Thermal Shutdown Protection, Input Capacitor Selection,
Output Capacitor Selection, Setting the Input Undervoltage Lockout Level, and Adjusting
Output Voltage sections; Updated TOCs 57–62.
1, 13, 15
17–20
3/19
Updated the Benefits and Features, Pin Description, Thermal-Shutdown Protection
sections, TOC19–21, TOC63–67; added TOC68–69; corrected typos in the General
Description, Detailed Description, Operating Input-Voltage Range sections, and Figures 3–7; replaced the Typical Application Circuit on page 1, Functional Diagram, and
Mode Selection and External Clock Synchronization section
1, 9, 14–19
22–24
1
2
PAGES
CHANGED
DESCRIPTION
—
For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
© 2019 Maxim Integrated Products, Inc. │ 24
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