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MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
General Description
The Himalaya series of voltage regulator ICs and power
modules enable cooler, smaller, and simpler power-supply
solutions. The MAXM15065/MAXM15066/MAXM15067
are a family of high-efficiency, synchronous step-down
DC-DC modules with integrated controller, MOSFETs,
compensation components, and inductor that operate
over a wide input-voltage range. The modules operate from 4.5V to 60V input and deliver up to 300mA
output current. The MAXM15065 and MAXM15066
are fixed 3.3V and 5V output modules respectively.
The MAXM15067 is an adjustable output (0.9V to
6.3V) module. The modules significantly reduce design
complexity, manufacturing risks, and offer a true plug and
play power/supply solution, reducing time-to-market.
The MAXM15065/MAXM15066/MAXM15067 modules
employ peak-current-mode control architecture. To reduce
input inrush current, the modules offer a fixed 3.75ms
soft-start time.
The MAXM15065/MAXM15066/MAXM15067 modules
are available in a low profile, compact 10-pin, 2.6mm x
3mm x 1.5mm, uSLIC™ package.
Industrial Sensors and Encoders
4-20mA Current-Loop Powered Sensors
LDO Replacement
HVAC and Building Control
Battery-Powered Equipment
General Purpose Point-of-Load
USB Type-C Powered Loads
● High Efficiency
• Selectable PWM- or PFM-Mode of Operation
• Shutdown Current as Low as 2.2μA (typ)
● Flexible Design
• Internal Soft-Start and Prebias Startup
• Open-Drain Power Good Output (RESET Pin)
• Programmable EN/UVLO Threshold
● Robust Operation
• Hiccup Overcurrent Protection
• Overtemperature Protection
• -40°C to +125°C Ambient Operating Temperature/
-40°C to +150°C Junction Temperature
Ordering Information appears at end of data sheet.
uSLIC is a trademark of Maxim Integrated Products, Inc.
Typical Application Circuit 2.5V
Typical Application Circuit 5V
VOUT
2.5V, 300mA
VIN
24V
CIN
1µF
● Easy to Use
• Wide 4.5V to 60V Input
• Adjustable 0.9V to 6.3V Output
• Fixed 3.3V and 5V Output
(MAXM15065 and MAXM15066)
• ±1.5% Feedback Accuracy
• Up to 300mA Output-Current
• Internally Compensated
• All Ceramic Capacitors
● Rugged
• Complies with CISPR22(EN55022) Class B
Conducted and Radiated Emissions
• Passes Drop, Shock, and Vibration Standards:
JESD22-B103, B104, B111
Applications
●
●
●
●
●
●
●
Benefits and Features
VIN
R1
2.2MΩ
R2
825kΩ
OUT
RESET
GND
COUT
10µF
R3
133kΩ
VIN
24V
CIN
1µF
MAXM15067
C1
1µF
19-100508: Rev 0; 3/19
EN/UVLO
FB
VCC
LX
MODE
VOUT
5V, 300mA
VIN
OUT
EN/UVLO
GND
MAXM15066
R4
75kΩ
C1
1µF
RESET
FB
VCC
LX
MODE
COUT
10µF
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
Absolute Maximum Ratings
VIN, EN/UVLO to GND.............................................-0.3V to 70V
LX, OUT and GND......................................-0.3V to (VIN + 0.3V)
VCC, FB, RESET to GND...........................................-0.3V to 6V
MODE to GND........................................... -0.3V to (VCC + 0.3V)
Output Short-Circuit Duration.....................................Continuous
Junction Temperature (Note 1).........................................+150°C
Storage Temperature Range............................. -55°C to +125°C
Lead temperature (soldering,10s)....................................+260°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: 10-PIN uSLIC
Package Code
M102A3+2
Outline Number
21-100094
Land Pattern Number
90-100027
THERMAL RESISTANCE, FOUR-LAYER BOARD (Note 2)
Junction to Ambient (θJA)
41.56 ºC/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 resistance is measured on an evaluation board with natural convection.
Electrical Characteristics
(VIN = VEN/UVLO = 24V, VGND = 0V, CVCC = 1μF, FB = 1V (MAXM15067), FB = 3.6V (MAXM15065) FB = 5.5V (MAXM15066),
LX = MODE = RESET = OUT = unconnected; TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.
All voltages are referenced to GND, unless otherwise noted.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
60
V
2.2
4
μA
160
INPUT SUPPLY (VIN)
Input-Voltage Range
Input-Shutdown Current
Input-Supply Current
VIN
4.5
IIN-SH
VEN/UVLO = 0V, shutdown mode
IQ-PFM
MODE = unconnected, FB = 1.03 × VFB-REG
95
IQ-PWM
Normal switching mode, VIN = 24V, MODE=0
3.2
μA
mA
ENABLE/UVLO (EN/UVLO)
EN/UVLO Threshold
VENR
VEN/UVLO rising
1.19
1.215
1.28
VENF
VEN/UVLO falling
1.06
1.09
1.16
V
+100
nA
VEN-TRUESD VEN/UVLO falling, true shutdown
EN/UVLO Input-Leakage Current
IEN/UVLO
0.75
TA = +25°C
-100
6V < VIN < 60V, 0mA < IVCC < 10mA
4.75
5
5.25
V
13
30
50
mA
LDO (VCC)
VCC Output-Voltage Range
VCC Current Limit
www.maximintegrated.com
VCC
IVCC-MAX
VCC = 4.3V
Maxim Integrated │ 2
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
Electrical Characteristics (continued)
(VIN = VEN/UVLO = 24V, VGND = 0V, CVCC = 1μF, FB = 1V (MAXM15067), FB = 3.6V (MAXM15065) FB = 5.5V (MAXM15066),
LX = MODE = RESET = OUT = unconnected; TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.
All voltages are referenced to GND, unless otherwise noted.) (Note 3)
PARAMETER
VCC Dropout
VCC UVLO
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
0.15
0.3
V
VCC-DO
VIN = 4.5V, IVCC = 5mA
VCC-UVR
VCC rising
4.05
4.18
4.3
VCC-UVF
VCC falling
3.7
3.8
3.95
3.5
3.75
4
V
SOFT-START (SS)
Soft-Start Time
tSS
ms
FEEDBACK (FB)
FB-Regulation Voltage
FB-Leakage Current
VFB-REG
IFB
MODE = GND, MAXM15067
0.887
0.90
0.913
MODE = unconnected, MAXM15067
0.887
0.915
0.936
MODE = GND, MAXM15065
3.25
3.30
3.35
MODE = unconnected, MAXM15065
3.25
3.35
3.42
MODE = GND, MAXM15066
4.93
5.00
5.07
MODE = unconnected, MAXM15066
4.93
5.08
5.18
MAXM15067
-100
-25
515
550
585
kHz
62.5
64.5
66.5
%
V
nA
TIMING
Switching Frequency
fSW
FB Undervoltage Trip Level to
Cause Hiccup
Hiccup Timeout
Minimum On-Time
Maximum Duty Cycle
RESET
120
tON-MIN
DMAX
FB = 0.98 x FBREG
ms
90
120
ns
89
91.4
94
%
FB Threshold for RESET Rising
FB rising
93.5
95.5
97.5
%
FB Threshold for RESET Falling
FB falling
90
92
94
%
RESET Delay After FB Reaches
Rising Threshold
1.9
ms
RESET Output-Level Low
IRESET = 5mA
0.2
V
RESET Output-Leakage Current
VRESET = 5.5V, TA = +25°C
0.1
μA
MODE
MODE Internal Pullup Resistor
500
kΩ
166
°C
10
°C
THERMAL SHUTDOWN
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.
www.maximintegrated.com
Maxim Integrated │ 3
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics
(VIN = VEN/UVLO = 24V, VGND = 0V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are
referenced to GND, unless otherwise noted. The circuit values for different output-voltage applications are as in Table 1, unless otherwise noted.)
toc01
100
MAXM15067
EFFICIENCY vs. LOAD CURRENT
ADJUSTABLE VOUT = 1.5V, PWM MODE
80
80
70
70
50
40
VIN = 5V
30
VIN = 12V
60
30
10
10
60
VIN = 12V
40
20
30
VIN = 5V
50
20
0
0
90 120 150 180 210 240 270 300
50
10
0
30
60
0
90 120 150 180 210 240 270 300
toc04
MAXM15067
EFFICIENCY vs. LOAD CURRENT
ADJUSTABLE VOUT = 5V, PWM MODE
100
toc05
90
80
70
70
30
VIN = 36V
20
0
40
30
60
VIN = 60V
60
40
0
0
30
60
90 120 150 180 210 240 270 300
MAXM15066
EFFICIENCY vs. LOAD CURRENT
FIXED VOUT = 5V, PWM MODE
100
toc08
70
70
VIN = 24V
VIN = 36V
30
20
VIN = 48V
10
0
0
30
60
90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
www.maximintegrated.com
60
50
VIN = 36V
VIN = 12V
VIN = 24V
40
VIN = 48V
30
20
VIN = 60V
10
0
EFFICIENCY (%)
80
70
EFFICIENCY (%)
90
40
0
30
60
90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
60
90 120 150 180 210 240 270 300
toc09
VIN = 5V
60
50
VIN = 12V
40
30
20
10
0
0
30
100
80
VIN = 12V
VIN = 60V
MAXM15067
EFFICIENCY vs. LOAD CURRENT
ADJUSTABLE VOUT = 0.9V, PFM MODE
90
50
VIN = 12V
LOAD CURRENT (mA)
80
VIN = 5.5V
VIN = 24V
VIN = 48V
20
90
60
VIN = 36V
50
LOAD CURRENT (mA)
toc07
toc06
10
LOAD CURRENT (mA)
100
90 120 150 180 210 240 270 300
30
10
90 120 150 180 210 240 270 300
MAXM15065
EFFICIENCY vs. LOAD CURRENT
FIXED VOUT = 3.3V, PWM MODE
VIN = 12V
VIN = 48V
20
0
0
VIN = 24V
VIN = 36V
50
30
VIN = 48V
10
60
70
60
EFFICIENCY (%)
VIN = 5.5V
VIN = 24V
30
MAXM15067
EFFICIENCY vs. LOAD CURRENT
ADJUSTABLE VOUT = 6.3V, PWM MODE
100
80
40
VIN = 36V
0
LOAD CURRENT (mA)
90
VIN = 12V
VIN = 24V
20
80
50
VIN = 12V
40
90
60
VIN = 5V
60
LOAD CURRENT (mA)
EFFICIENCY (%)
EFFICIENCY (%)
100
70
30
VIN = 20V
LOAD CURRENT (mA)
MAXM15067
EFFICIENCY vs. LOAD CURRENT
ADJUSTABLE VOUT = 3.3V, PWM MODE
EFFICIENCY (%)
90
80
60
MAXM15067
EFFICIENCY vs. LOAD CURRENT
ADJUSTABLE VOUT = 2.5V, PWM MODE toc03
100
90
0
EFFICIENCY (%)
toc02
90
EFFICIENCY (%)
EFFICIENCY (%)
100
MAXM15067
EFFICIENCY vs. LOAD CURRENT
ADJUSTABLE VOUT = 0.9V, PWM MODE
1
10
100
LOAD CURRENT (mA)
Maxim Integrated │ 4
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(VIN = VEN/UVLO = 24V, VGND = 0V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are
referenced to GND, unless otherwise noted. The circuit values for different output-voltage applications are as in Table 1, unless otherwise noted.)
MAXM15067
EFFICIENCY vs. LOAD CURRENT
ADJUSTABLE VOUT = 2.5V, PFM MODE
toc10
100
80
80
80
70
70
70
VIN = 5V
50
VIN =12V
40
VIN = 20V
60
50
VIN = 36V
40
VIN = 12V
VIN = 24V
60
50
30
20
20
20
10
10
10
0
0
10
100
100
toc14
100
80
70
70
70
VIN = 60V
VIN = 36V
VIN = 12V
30
VIN = 48V
60
50
VIN = 60V
VIN = 36V
40
VIN = 24V
VIN = 12V
30
VIN = 48V
EFFICIENCY (%)
90
80
EFFICIENCY (%)
90
80
VIN = 24V
20
10
0
0
10
LOAD CURRENT (mA)
0
100
toc16
0.904
90
MAXM15067
OUTPUT VOLTAGE vs. LOAD CURRENT
ADJUSTABLE VOUT = 0.9V, PWM MODE
VIN = 60V
VIN = 36V
VIN = 24V
VIN = 12V
30
VIN = 48V
20
1.500
toc17
0.900
0.899
0.898
0.897
0.896
1
10
LOAD CURRENT (mA)
www.maximintegrated.com
100
VIN = 5V
0.901
0
toc18
1.498
0.902
10
100
10
MAXM15067
OUTPUT VOLTAGE vs. LOAD CURRENT
ADJUSTABLE VOUT = 1.5V, PWM MODE
VIN = 12V
OUTPUT VOLTAGE (V)
60
OUTPUT VOLTAGE (V)
70
40
1
VIN = 48V
VIN=24V
LOAD CURRENT (mA)
0.903
80
50
VIN = 12V
LOAD CURRENT (mA)
MAXM15066
EFFICIENCY vs. LOAD CURRENT
FIXED VOUT = 5V, PFM MODE
100
VIN = 36V
30
10
1
toc15
VIN = 5.5V
40
20
100
MAXM15065
EFFICIENCY vs. LOAD CURRENT
FIXED VOUT = 3.3V, PFM MODE
50
10
10
100
60
20
1
10
100
90
60
VIN = 48V
VIN = 24V
LOAD CURRENT (mA)
MAXM15067
EFFICIENCY vs. LOAD CURRENT
ADJUSTABLE VOUT = 6.3V, PFM MODE
toc13
40
1
LOAD CURRENT (mA)
100
50
VIN = 12V
30
0
10
1
VIN = 36V
40
30
1
VIN = 5.5V
90
EFFICIENCY (%)
60
toc12
100
VIN = 5V
MAXM15067
EFFICIENCY vs. LOAD CURRENT
ADJUSTABLE VOUT = 5V, PFM MODE
EFFICIENCY (%)
toc11
90
LOAD CURRENT (mA)
EFFICIENCY (%)
MAXM15067
EFFICIENCY vs. LOAD CURRENT
ADJUSTABLE VOUT = 3.3V, PFM MODE
90
EFFICIENCY (%)
EFFICIENCY (%)
100
MAXM15067
EFFICIENCY vs. LOAD CURRENT
ADJUSTABLE VOUT = 1.5V, PFM MODE
VIN = 5V
1.496
VIN = 12V
1.494
1.492
1.490
VIN = 20V
1.488
1.486
1.484
0
30
60
90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
0
30
60
90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
Maxim Integrated │ 5
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(VIN = VEN/UVLO = 24V, VGND = 0V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are
referenced to GND, unless otherwise noted. The circuit values for different output-voltage applications are as in Table 1, unless otherwise noted.)
MAXM15067
OUTPUT VOLTAGE vs. LOAD CURRENT
ADJUSTABLE VOUT = 3.3V, PWM MODE
3.300
2.498
3.292
2.492
3.284
VIN = 12V
2.486
VIN = 24V
OUTPUT VOLTAGE (V)
VIN = 5V
2.480
2.474
2.468
VIN = 36V
2.462
60
3.260
3.252
90 120 150 180 210 240 270 300
VIN = 48V
VIN = 36V
6.40
VIN = 12V
6.36
VIN = 36V
VIN = 24V
toc22
5.02
5.00
VIN = 48V
VIN = 60V
4.96
0
30
60
90
120 150 180 210 240 270 300
0
30
60
6.34
6.32
6.30
6.28
6.26
6.24
5.002
VIN = 5.5V
3.302
3.300
3.298
VIN = 12V
120 150 180 210 240 270 300
MAXM15066
OUTPUT VOLTAGE vs. LOAD CURRENT
FIXED VOUT = 5V, PWM MODE toc24
5.004
VIN = 48V
VIN = 36V
90
LOAD CURRENT (mA)
MAXM15065
OUTPUT VOLTAGE vs. LOAD CURRENT
FIXED VOUT = 3.3V, PWM MODE toc23
3.304
VIN = 48V
VIN = 60V
4.98
3.306
OUTPUT VOLTAGE (V)
6.38
5.04
LOAD CURRENT (mA)
MAXM15067
OUTPUT VOLTAGE vs. LOAD CURRENT
ADJUSTABLE VOUT = 6.3V, PWM MODE
VIN = 36V
5.06
3.268
3.228
30
toc21
VIN = 24V
3.236
0
VIN = 12V
5.08
3.276
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
5.10
VIN = 24V
VIN = 5.5V
3.244
2.456
2.450
VIN = 12V
toc20
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
2.504
MAXM15067
OUTPUT VOLTAGE vs. LOAD CURRENT
ADJUSTABLE VOUT = 5V, PWM MODE
OUTPUT VOLTAGE (V)
MAXM15067
OUTPUT VOLTAGE vs. LOAD CURRENT
ADJUSTABLE VOUT = 2.5V, PWM MODE toc19
VIN = 24V
3.296
VIN = 48V
VIN = 60V
5.000
4.998
VIN = 12V
4.996
VIN = 24V
VIN = 36V
6.22
0
30
60
3.294
90 120 150 180 210 240 270 300
0
30
60
toc25
1.55
MAXM15067
OUTPUT VOLTAGE vs. LOAD CURRENT
ADJUSTABLE VOUT = 1.5V, PFM MODE
1.54
VIN = 5V
0.925
60
90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
MAXM15067
OUTPUT VOLTAGE vs. LOAD CURRENT
ADJUSTABLE VOUT = 2.5V, PFM MODE
toc26
toc27
VIN =12V
0.916
0.907
0.898
0.889
2.56
VIN = 5V
1.53
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
30
2.58
0.934
0.880
0
LOAD CURRENT (mA)
LOAD CURRENT (mA)
MAXM15067
OUTPUT VOLTAGE vs. LOAD CURRENT
ADJUSTABLE VOUT = 0.9V, PFM MODE
4.994
90 120 150 180 210 240 270 300
VIN = 20V
1.52
VIN =12V
1.51
1.50
1.49
0
30
60
90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
www.maximintegrated.com
1.48
OUTPUT VOLTAGE (V)
6.20
VIN = 36V
2.54
2.52
VIN = 24V
2.50
VIN =12V
VIN = 5V
2.48
2.46
0
30
60
90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
2.44
0
30
60
90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
Maxim Integrated │ 6
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(VIN = VEN/UVLO = 24V, VGND = 0V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are
referenced to GND, unless otherwise noted. The circuit values for different output-voltage applications are as in Table 1, unless otherwise noted.)
MAXM15067
OUTPUT VOLTAGE vs. LOAD CURRENT
ADJUSTABLE VOUT = 3.3V, PFM MODE
MAXM15067
OUTPUT VOLTAGE vs. LOAD CURRENT
ADJUSTABLE VOUT = 5V, PFM MODE
toc28
5.20
MAXM15067
OUTPUT VOLTAGE vs. LOAD CURRENT
ADJUSTABLE VOUT = 6.3V, PFM MODE
toc29
6.50
3.39
VIN = 36V
3.33
VIN = 24V
3.31
VIN = 5.5V
3.29
VIN =12V
VIN = 48V
VIN = 48V
5.12
VIN = 24V
VIN = 36V
VIN = 12V
5.08
5.04
3.27
3.25
0
30
60
90 120 150 180 210 240 270 300
6.41
VIN = 24V
VIN = 12V
6.38
6.35
6.32
6.29
6.26
6.20
0
30
60
5.110
VIN = 24V
OUTPUT VOLTAGE (V)
3.35
VIN = 5.5V
3.33
VIN = 36V
VIN = 48V
3.31
3.29
30
60
90 120 150 180 210 240 270 300
MAXM15067 OUTPUT VOLTAGE RIPPLE
VIN = 12V, ADJUSTABLE VOUT = 1.5V,
FULL LOAD, PWM MODE
toc33
VIN = 24V
5.085
VIN = 12V
0
LOAD CURRENT (mA)
MAXM15066
OUTPUT VOLTAGE vs. LOAD CURRENT
FIXED VOUT = 5V, PFM MODE
toc32
3.39
3.37
90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
MAXM15065
OUTPUT VOLTAGE vs. LOAD CURRENT
FIXED VOUT = 3.3V, PFM MODE toc31
OUTPUT VOLTAGE (V)
VIN = 36V
6.23
5.00
LOAD CURRENT (mA)
VIN = 12V
5.060
VIN = 36V
5.035
10mV/div
VOUT(AC)
VIN = 48V
VIN = 60V
5.010
4.985
3.27
3.25
VIN = 60V
VIN = 48V
6.44
OUTPUT VOLTAGE (V)
3.35
6.47
VIN = 60V
5.16
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
3.37
toc30
4.960
0
30
60
90 120 150 180 210 240 270 300
0
30
60
LOAD CURRENT (mA)
MAXM15067 OUTPUT VOLTAGE RIPPLE
VIN = 24V, ADJUSTABLE VOUT = 3.3V,
FULL LOAD, PWM MODE
toc34
MAXM15067 OUTPUT VOLTAGE RIPPLE
VIN = 24V, ADJUSTABLE VOUT = 5V,
FULL LOAD, PWM MODE
toc35
10mV/div
VOUT(AC)
2µs/div
www.maximintegrated.com
2µs/div
90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
VOUT(AC)
MAXM15065 OUTPUT VOLTAGE RIPPLE
VIN = 24V, FIXED VOUT = 3.3V,
FULL LOAD, PWM MODE
toc36
10mV/div
2µs/div
VOUT(AC)
10mV/div
2µs/div
Maxim Integrated │ 7
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(VIN = VEN/UVLO = 24V, VGND = 0V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are
referenced to GND, unless otherwise noted. The circuit values for different output-voltage applications are as in Table 1, unless otherwise noted.)
MAXM15066 OUTPUT VOLTAGE RIPPLE
VIN = 24V, FIXED VOUT = 5V
FULL LOAD, PWM MODE
toc37
10mV/div
VOUT(AC)
VIN(AC)
2µs/div
50mV/div
2µs/div
MAXM15065 INPUT VOLTAGE RIPPLE
VIN = 24V, FIXED VOUT = 3.3V,
FULL LOAD, PWM MODE
toc41
100mV/div
VIN(AC)
MAXM15066 INPUT VOLTAGE RIPPLE
VIN = 24V, FIXED VOUT = 5V
FULL LOAD, PWM MODE
toc42
50mV/div
VIN(AC)
2µs/div
2µs/div
MAXM15067 LOAD TRANSIENT RESPONSE
VIN = 12V, ADJUSTABLE VOUT = 1.5V, PWM MODE
(LOAD CURRENT STEPPED FROM 150mA TO 300mA)
toc43
100mV/div
VIN(AC)
2µs/div
MAXM15067 LOAD TRANSIENT RESPONSE
VIN = 12V, ADJUSTABLE VOUT = 1.5V, PFM MODE
(LOAD CURRENT STEPPED FROM 5mA to 150mA)
50mV/div
VIN(AC)
2µs/div
MAXM15067 INPUT VOLTAGE RIPPLE
VIN = 24V, ADJUSTABLE VOUT = 5V,
FULL LOAD, PWM MODE
toc40
MAXM15067 LOAD TRANSIENT RESPONSE
VIN = 24V, ADJUSTABLE VOUT = 3.3V, PFM MODE
(LOAD CURRENT STEPPED FROM 5mA TO 150mA)
toc44
VOUT(AC)
VOUT(AC)
MAXM15067 INPUT VOLTAGE RIPPLE
VIN = 24V, ADJUSTABLE VOUT = 3.3V,
FULL LOAD, PWM MODE
toc39
MAXM15067 INPUT VOLTAGE RIPPLE
VIN = 12V, ADJUSTABLE VOUT = 1.5V
FULL LOAD, PWM MODE
toc38
toc45
50mV/div
50mV/div
100mV/div
VOUT(AC)
100mA/div
IOUT
100mA/div
100µs/div
www.maximintegrated.com
IOUT
IOUT
100µs/div
100mA/div
100µs/div
Maxim Integrated │ 8
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(VIN = VEN/UVLO = 24V, VGND = 0V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are
referenced to GND, unless otherwise noted. The circuit values for different output-voltage applications are as in Table 1, unless otherwise noted.)
MAXM15067 LOAD TRANSIENT RESPONSE
VIN=24V, ADJUSTABLE VOUT = 3.3V, PWM MODE
(LOAD CURRENT STEPPED FROM 150mA TO 300mA)
MAXM15067 LOAD TRANSIENT RESPONSE
VIN = 24V, ADJUSTABLE VOUT = 5V, PFM MODE
(LOAD CURRENT STEPPED FROM 5mA TO 150mA)
MAXM15067 LOAD TRANSIENT RESPONSE
VIN = 24V, ADJUSTABLE VOUT = 5V, PWM MODE
(LOAD CURRENT STEPPED FROM 150mA TO 300mA)
toc48
toc47
toc46
VOUT(AC)
100mV/div
VOUT(AC)
200mV/div
IOUT
100mA/div
VOUT(AC)
100mV/div
IOUT
100mA/div
100mA/div
IOUT
100µs/div
100µs/div
MAXM15065 LOAD TRANSIENT RESPONSE
VIN = 24V, FIXED VOUT = 3.3V, PFM MODE
(LOAD CURRENT STEPPED FROM 5mA TO 150mA)
toc49
100mV/div
100µs/div
MAXM15065 LOAD TRANSIENT RESPONSE
VIN = 24V, FIXED VOUT = 3.3V, PWM MODE
(LOAD CURRENT STEPPED FROM 150mA TO 300mA)
toc50
MAXM15066 LOAD TRANSIENT RESPONSE
VIN = 24V, FIXED VOUT = 5V, PFM MODE
(LOAD CURRENT STEPPED FROM 5mA TO 150mA)
toc51
100mV/div
VOUT(AC)
200mV/div
VOUT(AC)
VOUT(AC)
100mA/div
100mA/div
IOUT
IOUT
100µs/div
100µs/div
MAXM15066 LOAD TRANSIENT RESPONSE
VIN = 24V, FIXED VOUT = 5V, PWM MODE
(LOAD CURRENT STEPPED FROM 150mA TO 300mA)
100µs/div
MAXM15067 SHUTDOWN THROUGH ENABLE
VIN = 12V, ADJUSTABLE VOUT = 1.5V,
FULL LOAD, PWM MODE
toc54
MAXM15067 STARTUP THROUGH ENABLE
VIN = 12V, ADJUSTABLE VOUT = 1.5V,
FULL LOAD, PWM MODE
toc53
toc52
100mA/div
IOUT
5V/div
VOUT(AC)
100mV/div
EN/UVLO
5V/div
EN/UVLO
10V/div
LX
LX
10V/div
VOUT
1V/div
RESET
5V/div
1V/div
100mA/div
VOUT
5V/div
RESET
IOUT
100µs/div
www.maximintegrated.com
1ms/div
100µs/div
Maxim Integrated │ 9
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(VIN = VEN/UVLO = 24V, VGND = 0V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are
referenced to GND, unless otherwise noted. The circuit values for different output-voltage applications are as in Table 1, unless otherwise noted.)
MAXM15067 STARTUP THROUGH ENABLE
VIN = 24V, ADJUSTABLE VOUT = 3.3V,
FULL LOAD, PWM MODE
toc55
MAXM15067 SHUTDOWN THROUGH ENABLE
VIN = 24V, ADJUSTABLE VOUT = 3.3V,
FULL LOAD, PWM MODE
toc56
MAXM15067 STARTUP THROUGH ENABLE (2V PREBIAS)
VIN = 24V, ADJUSTABLE VOUT = 3.3V,
NO LOAD, PWM MODE
toc57
5V/div
EN/UVLO
5V/div
EN/UVLO
5V/div
EN/UVLO
LX
LX
20V/div
2V/div
VOUT
5V/div
RESET
LX
2V/div
VOUT
2V/div
VOUT
RESET
5V/div
RESET
1ms/div
5V/div
100µs/div
MAXM15067 STARTUP THROUGH ENABLE (2V PREBIAS)
VIN = 24V, ADJUSTABLE VOUT = 3.3V,
NO LOAD, PFM MODE
toc58
1ms/div
MAXM15067 STARTUP THROUGH ENABLE
VIN = 24V, ADJUSTABLE VOUT = 5V,
FULL LOAD, PWM MODE
toc59
MAXM15067 SHUTDOWN THROUGH ENABLE
VIN = 24V, ADJUSTABLE VOUT = 5V,
FULL LOAD, PWM MODE
toc60
5V/div
5V/div
EN/UVLO
EN/UVLO
LX
20V/div
20V/div
20V/div
EN/UVLO
5V/div
LX
20V/div
2V/div
LX
20V/div
VOUT
5V/div
VOUT
2V/div
RESET
5V/div
2V/div
VOUT
5V/div
RESET
RESET
1ms/div
MAXM15065 STARTUP THROUGH ENABLE
VIN = 24V, FIXED VOUT = 3.3V,
FULL LOAD, PWM MODE
toc61
1ms/div
100µs/div
MAXM15065 SHUTDOWN THROUGH ENABLE
VIN = 24V, FIXED VOUT = 3.3V,
FULL LOAD, PWM MODE
toc62
MAXM15065 STARTUP THROUGH ENABLE (2V PREBIAS)
VIN = 24V, FIXED VOUT = 3.3V,
NO LOAD, PWM MODE
toc63
5V/div
EN/UVLO
5V/div
5V/div
EN/UVLO
20V/div
LX
20V/div
LX
EN/UVLO
LX
20V/div
2V/div
5V/div
VOUT
RESET
1ms/div
www.maximintegrated.com
2V/div
VOUT
2V/div
VOUT
RESET
5V/div
RESET
100µs/div
5V/div
1ms/div
Maxim Integrated │ 10
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(VIN = VEN/UVLO = 24V, VGND = 0V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are
referenced to GND, unless otherwise noted. The circuit values for different output-voltage applications are as in Table 1, unless otherwise noted.)
MAXM15066 STARTUP THROUGH ENABLE
VIN = 24V, FIXED VOUT = 5V,
FULL LOAD, PWM MODE
toc65
MAXM15065 STARTUP THROUGH ENABLE (2V PREBIAS)
VIN = 24V, FIXED VOUT = 3.3V,
NO LOAD, PFM MODE
toc64
MAXM15066 SHUTDOWN THROUGH ENABLE
VIN = 24V, FIXED VOUT = 5V,
FULL LOAD, PWM MODE
toc66
5V/div
5V/div
EN/UVLO
EN/UVLO
LX
20V/div
EN/UVLO
LX
20V/div
2V/div
5V/div
LX
20V/div
2V/div
VOUT
5V/div
VOUT
5V/div
RESET
RESET
MAXM15066 STARTUP THROUGH ENABLE (2.5V PREBIAS)
VIN = 24V, FIXED VOUT = 5V,
toc67
NO LOAD, PWM MODE
5V/div
100µs/div
MAXM15066 STARTUP THROUGH ENABLE (2.5V PREBIAS)
VIN = 24V, FIXED VOUT = 5V,
NO LOAD, PFM MODE
toc68
EN/UVLO
EN/UVLO
20V/div
2V/div
5V/div
10V/div
VIN
20V/div
LX
10V/div
LX
2V/div
VOUT
5V/div
RESET
RESET
MAXM15067 STARTUP THROUGH VIN
VIN = 12V, ADJUSTABLE VOUT = 1.5V,
toc69
FULL LOAD, PWM MODE
5V/div
5V/div
VOUT
2V/div
1ms/div
1ms/div
LX
VOUT
RESET
2V/div
500mV/div
VCC
VOUT
1ms/div
1ms/div
MAXM15067 SHUTDOWN THROUGH VIN
VIN = 12V, ADJUSTABLE VOUT = 1.5V,
FULL LOAD, PWM MODE
toc70
1ms/div
MAXM15067 SHUTDOWN THROUGH VIN
VIN = 24V, ADJUSTABLE VOUT = 3.3V,
FULL LOAD, PWM MODE
toc72
MAXM15067 STARTUP THROUGH VIN
VIN = 24V, ADJUSTABLE VOUT = 3.3V,
toc71
FULL LOAD, PWM MODE
20V/div
VIN
10V/div
VIN
LX
10V/div
LX
20V/div
VIN
20V/div
LX
20V/div
2V/div
2V/div
VCC
VOUT
500mV/div
1ms/div
www.maximintegrated.com
2V/div
VCC
VCC
2V/div
VOUT
VOUT
2V/div
1ms/div
1ms/div
Maxim Integrated │ 11
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(VIN = VEN/UVLO = 24V, VGND = 0V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are
referenced to GND, unless otherwise noted. The circuit values for different output-voltage applications are as in Table 1, unless otherwise noted.)
MAXM15067 STARTUP THROUGH VIN
VIN = 24V, ADJUSTABLE VOUT = 5V,
FULL LOAD, PWM MODE
toc73
MAXM15065 STARTUP THROUGH VIN
VIN = 24V, FIXED VOUT = 3.3V,
FULL LOAD, PWM MODE
toc75
MAXM15067 SHUTDOWN THROUGH VIN
VIN = 24V, ADJUSTABLE VOUT = 5V,
FULL LOAD, PWM MODE
toc74
20V/div
20V/div
VIN
20V/div
LX
VIN
20V/div
VIN
LX
20V/div
LX
20V/div
2V/div
2V/div
2V/div
2V/div
VCC
VCC
2V/div
VCC
VOUT
VOUT
2V/div
VOUT
1ms/div
1ms/div
1ms/div
MAXM15065 SHUTDOWN THROUGH VIN
VIN = 24V, FIXED VOUT = 3.3V,
FULL LOAD, PWM MODE
toc76
MAXM15066 SHUTDOWN THROUGH VIN
VIN = 24V, FIXED VOUT = 5V,
FULL LOAD, PWM MODE
toc78
MAXM15066 STARTUP THROUGH VIN
VIN = 24V, FIXED VOUT = 5V,
FULL LOAD, PWM MODE
toc77
20V/div
VIN
20V/div
LX
20V/div
VIN
20V/div
LX
VIN
20V/div
LX
20V/div
VCC
2V/div
VOUT
2V/div
2V/div
2V/div
VCC
2V/div
VCC
VOUT
2V/div
VOUT
1ms/div
1ms/div
MAXM15067 OUTPUT SHORT IN STEADY STATE
VIN = 24V, ADJUSTABLE VOUT = 3.3V,
FULL LOAD, PWM MODE
toc79
1ms/div
MAXM15067 OUTPUT SHORT DURING STARTUP
VIN = 24V, ADJUSTABLE VOUT = 3.3V,
FULL LOAD, PWM MODE
toc80
20V/div
5V/div
VIN
SHORT
VOUT
2V/div
LX
20V/div
IOUT
200mA/div
20ms/div
www.maximintegrated.com
MAXM15065 OUTPUT SHORT IN STEADY STATE
VIN = 24V, FIXED VOUT = 3.3V,
FULL LOAD, PWM MODE
toc81
5V/div
SHORT
VOUT
20mV/div
LX
20V/div
10mA/div
IOUT
20ms/div
VOUT
2V/div
LX
20V/div
IOUT
500mA/div
20ms/div
Maxim Integrated │ 12
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(VIN = VEN/UVLO = 24V, VGND = 0V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are
referenced to GND, unless otherwise noted. The circuit values for different output-voltage applications are as in Table 1, unless otherwise noted.)
MAXM15066 OUTPUT SHORT IN STEADY-STATE
VIN = 24V, FIXED VOUT = 5V,
FULL LOAD, PWM MODE
toc83
MAXM15065 OUTPUT SHORT DURING STARTUP
VIN = 24V, FIXED VOUT = 3.3V,
FULL LOAD, PWM MODE
toc82
20V/div
5V/div
SHORT
VIN
VOUT
20mV/div
VOUT
5V/div
LX
20V/div
LX
20V/div
10mA/div
IOUT
500mA/div
IOUT
20ms/div
20ms/div
MAXM15067 BODE PLOT
VIN = 12V, ADJUSTABLE VOUT = 1.5V,
FULL LOAD, PWM MODE
toc85
100
100
80
20V/div
60
VIN
80
PHASE
60
VOUT
20mV/div
GAIN (dB)
40
40
20
20
0
LX
20V/div
-40
IOUT
10mA/div
-60
-80
20ms/div
0
GAIN
-20
-20
-40
CROSSOVER FREQUENCY = 49.294kHz
PHASE MARGIN = 46.023◦
1k
PHASE MARGIN (◦)
MAXM15066 OUTPUT SHORT DURING STARTUP
VIN = 24V, FIXED VOUT = 5V,
FULL LOAD, PWM MODE
toc84
-60
-80
100k
10k
FREQUENCY (Hz)
100
80
80
60
60
60
60
40
40
40
40
20
20
20
20
0
0
GAIN
-20
-20
-40
CROSSOVER FREQUENCY = 47.638kHz
PHASE MARGIN = 49.468°
-60
-80
1k
10k
FREQUENCY (Hz)
www.maximintegrated.com
GAIN (dB)
100
80
GAIN (dB)
toc86
PHASE
PHASE MARGIN (◦)
100
MAXM15067 BODE PLOT
VIN = 24V, ADJUSTABLE VOUT = 5V,
FULL LOAD, PWM MODE
toc87
PHASE
0
-40
-60
-60
-80
100k
-80
80
0
GAIN
-20
-40
100
-20
PHASE MARGIN (◦)
MAXM15067 BODE PLOT
VIN = 24V, ADJUSTABLE VOUT = 3.3V,
FULL LOAD, PWM MODE
-40
CROSSOVER FREQUENCY = 37.212kHz
PHASE MARGIN = 54.136°
1k
10k
-60
-80
100k
FREQUENCY (Hz)
Maxim Integrated │ 13
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(VIN = VEN/UVLO = 24V, VGND = 0V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are
referenced to GND, unless otherwise noted. The circuit values for different output-voltage applications are as in Table 1, unless otherwise noted.)
100
PHASE
100
100
60
60
60
40
40
40
40
20
20
20
20
0
0
GAIN
-20
-80
1k
10k
0
GAIN
-20
-40
-60
-60
-80
100k
-80
-20
-40
CROSSOVER FREQUENCY = 45.639kHz
PHASE MARGIN = 58.503°
1k
-60
-80
100k
10k
FREQUENCY (Hz)
FREQUENCY (Hz)
MAXM15065/6
OUTPUT CURRENT vs. AMBIENT TEMPERATURE
MAXM15067
OUTPUT CURRENT vs. AMBIENT TEMPERATURE
toc90
350
toc91
350
300
OUTPUT CURRENT (mA)
300
250
ADJUSTABLE VOUT = 2.5V
200
150
100
250
FIXED VOUT = 3.3V
200
FIXED VOUT = 5V
150
100
50
0
80
0
-40
CROSSOVER FREQUENCY = 45.746kHz
PHASE MARGIN = 54.585°
-60
GAIN (dB)
60
-40
OUTPUT CURRENT (mA)
100
80
-20
50
50
70
90
110
0
130
50
AMBIENT TEMPERATURE (°C)
toc92
40.0
40
PEAK
EMISSION
AVERAGE
EMISSION
10
150k
1M
10M
FREQUENCY (Hz)
CONDITIONS : VIN = 24V, VOUT = 5V, IOUT = 0.3A
www.maximintegrated.com
MAGNITUDE (dBµV/m)
30
Am p litu d e (d Bu V /m )
40
20
110
130
toc93
50.0
50
CISPR-22 CLASS B AVG LIMIT
50
90
TUV Rheinland
Final_ScanV
MaximIC_MAXM15067_24VIN_VOUT
FinaL_ScanH
RE 30MHz-1GHz
RADIATED EMISSION PLOT Limit
CISPR-22 CLASS B QP LIMIT
60
70
AMBIENT TEMPERATURE (°C)
CONDUCTED EMISSION PLOT
(WITH FILTER C = 0.1µF + 0.68µF, L = 82µH, C = 1µF)
MAGNITUDE (dBµV)
toc89
PHASE
80
PHASE MARGIN (◦)
80
GAIN (dB)
toc88
MAXM15066 BODE PLOT
VIN = 24V, FIXED VOUT = 5V,
FULL LOAD, PWM MODE
PHASE MARGIN (◦)
MAXM15065 BODE PLOT
VIN = 24V, FIXED VOUT = 3.3V,
FULL LOAD, PWM MODE
CISPR-22 CLASS B QP LIMIT
30.0
30
20
20.0
VERTICAL
SCAN
10
10.0
00
-10.0
-10
30.0M
30M
HORIZONTAL
SCAN
100.0M
100M
FREQUENCY(Hz)
Frequency (Hz)
1.0G
1G
RE 30MHz-1GHz_0-360deg_90deg
Height_Quick
CONDITIONS :step_1-4mtr
VIN = 24V,
VOUT Scan_Test4.TIL
= 5V, IOUT = 0.3A
06:05:37 PM, Monday, November 26, 2018
Maxim Integrated │ 14
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
Pin Configuration
TOP VIEW
LX
1
GND
2
RESET
3
MODE
OUT
+
10
VIN
9
VIN
8
EN/UVLO
4
7
VCC
5
6
FB
MAXM15065
MAXM15066
MAXM15067
‘+’ INDICATES PIN 1 OF THE MODULE
Pin Description
PIN
NAME
1
LX
2
GND
3
RESET
Open-Drain Power-Good Output. Pull up RESET to an external power supply with an external resistor.
RESET goes low if FB drops below 92% of its set value. RESET goes high impedance 1.9ms after FB
rises above 95.5% of its set value. See the Electrical Characteristics table for threshold values.
4
MODE
PFM/PWM Mode-Selection Input. Connect MODE to GND to enable fixed-frequency PWM operation
at all loads. Leave MODE unconnected for PFM operation at light load.
5
OUT
Module Output Pin. Connect a capacitor from OUT to GND. See the PCB Layout Guidelines section for
more details.
6
FB
Output Feedback Connection. Connect FB to a resistor-divider between OUT and GND to set the output
voltage for MAXM15067. Connect to output voltage node (VOUT) for MAXM15065 and MAXM15066.
See Output-Voltage Setting section for more details.
7
VCC
8
EN/UVLO
9–10
VIN
www.maximintegrated.com
FUNCTION
Switching Node of the Inductor. No external connection to this pin.
Ground Pin. Connect GND to the ground plane. See the PCB Layout Guidelines section for more details.
Refer to the MAXM15067 EV kit for a sample layout.
Internal LDO Power Output. Bypass VCC to GND with a minimum 1µF ceramic capacitor.
Active-High, Enable/Undervoltage-Detection Input. Pull EN/UVLO to GND to disable the module output.
Connect EN/UVLO to VIN for always-on operation. Connect a resistor-divider between VIN, EN/UVLO,
and GND to program the input voltage at which the module turns on.
Power-Supply Input. Connect the VIN pins together. Decouple to GND with a capacitor;
place the capacitor close to the VIN and GND pins. See Table 1 for more details.
Maxim Integrated │ 15
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
Functional Diagram
Internal Diagram
MAXM15065/MAXM15066/
MAXM15067
VCC
VIN
LDO
HIGH-SIDE
DRIVER
EN/UVLO
LX
1.215V
33µH
PEAK
CURRENT-MODE
CONTROLLER
OSCILLATOR
LOW-SIDE
DRIVER
OUT
SOFT-START
MODE
GND
MODE
SELECTION
LOGIC
SLOPE
COMPENSATION
*S1
FB
*S2
R3
RESET
LOGIC
RESET
R4
*REFER TO TABLE A
Table A
MODULE PART NUMBER
S1
S2
R3 (KΩ)
R4 (KΩ)
MAXM15067
CLOSE
OPEN
OPEN
OPEN
MAXM15065
OPEN
CLOSE
205.33
77
MAXM15066
OPEN
CLOSE
350.80
77
www.maximintegrated.com
Maxim Integrated │ 16
MAXM15065/MAXM15066/
MAXM15067
Detailed Description
The MAXM15065/MAXM15066/MAXM15067 are a
family of high-efficiency, synchronous step-down DC-DC
modules with integrated controller, MOSFETs, compensation components, and inductor that operate over a
wide input-voltage range. The modules deliver an output
current up to 300mA. The MAXM15065 and MAXM15066
are fixed 3.3V and 5V output modules respectively. The
MAXM15067 is an adjustable output (0.9V to 6.3V)
module. When EN/UVLO and VCC UVLO are ascertained,
an internal power-up sequence ramps up the error-amplifier
reference, resulting in an output-voltage soft-start.
The FB pin monitors the output voltage through a resistordivider. The RESET pin transitions to a high-impedance
state 1.9ms after the output voltage reaches 95.5% of regulation. The devices select either PFM or forced-PWM mode
depending on the state of the MODE pin at power-up. By
pulling the EN/UVLO pin to low, the devices enter shutdown
mode and consumes only 2.2μA (typ) of standby current.
The modules use an internally compensated, fixed-fre
quency, current-mode control scheme. On the rising edge
of an internal clock, the high-side pMOSFET turns on.
An internal error amplifier compares the feedback voltage to a fixed internal reference voltage and generates
an error voltage. The error voltage is compared to a sum
of the current-sense voltage and a slope-compensation
voltage by a PWM comparator to set the on-time. During
the on-time of the pMOSFET, the inductor current ramps
up. For the remainder of the switching period (off-time),
the pMOSFET is kept off and the low-side nMOSFET
turns on. During the off-time, the inductor releases the
stored energy as the inductor current ramps down, providing current to the output. Under overload conditions,
the cycle-by-cycle current-limit feature limits the inductor
peak current by turning off the high-side pMOSFET and
turning on the low-side nMOSFET.
Mode Selection (MODE)
The logic state of the MODE pin is latched after VCC
and EN/UVLO voltages exceed respective UVLO rising
thresholds and all internal voltages are ready to allow LX
switching. If the MODE pin is unconnected at power-up,
the part operates in PFM mode at light loads. If the MODE
pin is grounded at power-up, the part operates in constant-frequency PWM mode at all loads. State changes
on the MODE pin are ignored during normal operation.
PWM Operation
In PWM mode, the module output current is allowed to
go negative. PWM operation is useful in frequency sensitive applications and provides fixed switching frequency
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4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
operation at all loads. However, PWM-mode of operation
gives lower efficiency at light loads compared to PFMmode of operation.
PFM Operation
PFM mode operation disables negative output current
from the module, and skips pulses at light loads for better efficiency. In PFM mode, the module output current
is forced to a fixed peak of 130mA in every clock cycle
until the output voltage rises to 102.3% of the nominal
value. Once the output voltage reaches 102.3% of the
nominal value, the high-side switch is turned off and the
low-side switch is turned on. Once the module output current hits zero cross, LX goes to a high-impedance state
and the module enters hibernate operation until the load
current discharges the output voltage to 101.1% of the
nominal value. Most of the internal blocks are turned off in
hibernate operation to save quiescent current. When the
output voltage falls below 101.1% of the nominal value,
the module comes out of hibernate operation, turns on all
internal blocks, and commences the process of delivering
pulses of energy until the output voltage reaches 102.3%
of the nominal value. The module naturally comes out
of PFM mode and serves load requirements when the
module output demands more than 130mA peak. The
advantage of PFM mode is higher efficiency at light loads
because of lower quiescent current drawn from supply.
Internal 5V Regulator
An internal regulator provides a 5V nominal supply to power
the internal functions and to drive the power MOSFETs. The
output of the linear regulator (VCC) should be bypassed
with a 1μF ceramic capacitor to GND. The VCC regulator dropout voltage is typically 150mV. An undervoltage
lockout circuit that disables the buck converter when VCC
falls below 3.8V (typ). The 400mV, VCC-UVLO hysteresis
prevents chattering on power-up and power-down.
Enable/Undervoltage Lockout (EN/UVLO),
Soft-Start
When EN/UVLO voltage is above 1.215V (typ), the
device’s internal error-amplifier reference voltage starts
to ramp up. The duration of the soft-start ramp is 3.75ms
(typ), allowing a smooth increase of the output voltage.
Driving EN/UVLO low disables both power MOSFETs, as
well as other internal circuitry, and reduces VIN quiescent
current to below 2.2μA. EN/UVLO can be used as an
input-voltage UVLO adjustment input. An external voltage-divider between VIN and EN/UVLO to GND adjusts
the input voltage at which the device turns on or turns off.
If input UVLO programming is not desired, connect EN/
UVLO to VIN (see the Electrical Characteristics table for
EN/UVLO rising and falling threshold voltages).
Maxim Integrated │ 17
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
RESET Output (RESET)
Thermal Overload Protection
Startup into a Prebiased Output
Applications Information
The devices include an open-drain RESET output to
monitor the output voltage. RESET goes high impedance
1.9ms after the output rises above 95.5% of its nominal
set value and pulls low when the output voltage falls
below 92% of the set nominal regulated voltage. RESET
asserts low during the hiccup timeout period.
The devices are capable of soft-start into a prebiased output, without discharging the output capacitor in both the
PFM and forced-PWM modes. Such a feature is useful in
applications where digital integrated circuits with multiple
rails are powered.
Overcurrent Protection (OCP)/Hiccup Mode
The MAXM15065/MAXM15066/MAXM15067 are provided with a robust overcurrent protection (OCP) scheme
that protects the modules under overload and output
short-circuit conditions. The power module measures and
limits peak inductor current. When overcurrent is detected
in the inductor, or if the FB node goes below 64.5% of its
nominal regulation threshold, the module enters hiccup
mode of operation. In hiccup mode, the module is protected by suspending switching for a hiccup timeout period
of 120ms (typ). Once the hiccup timeout period expires,
soft-start is attempted again. Hiccup mode of operation
ensures low power dissipation under output overload or
short-circuit conditions. Once the hiccup timeout period
expires, soft-start is attempted again.
The MAXM15065/6/7 are designed to support a maximum
load current of 300mA. The inductor ripple current is calculated as follows:
∆I
VIN − VOUT − 4.85 × I OUT VOUT + 3.05 × I OUT
×
L × f SW
VIN − 1.8 × I OUT
Where:
VOUT = Steady-state output voltage
VIN = Operating input voltage for given VOUT
fSW = Switching Frequency
L = Power module output inductance (33µH ±30%)
IOUT = Required output (load) current
The following condition should be satisfied at the desired
load current, IOUT.
∆I
I OUT + < 0.49
2
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Thermal overload protection limits the total power dissipation in the device. When the junction temperature
exceeds +166°C, an on-chip thermal sensor shuts down
the device, turns off the internal power MOSFETs, allowing the device to cool down. The thermal sensor turns the
device on after the junction temperature cools by 10°C.
Input-Voltage Range
The minimum and maximum operating input voltages for
a given output voltage should be calculated as follows:
=
VIN(MIN)
VOUT + (I OUT × 3.05)
D MAX
VIN(MAX) =
+ (I OUT × 1.8)
VOUT
t ON(MIN) × f SW
where:
VOUT = Steady-state output voltage,
IOUT = Maximum load current,
fSW = Worst-case switching frequency(585000 Hz),
DMAX = Maximum duty cycle (0.89),
tON(MIN) = Worst-case minimum controllable switch ontime (120ns).
Also, for duty cycle > 0.5;
VIN(MIN) > 2.67 × VOUT + 9.91 × IOUT - 9.8
For MAXM15065, VIN(MIN) = 5.5V, VIN(MAX) = 60V
For MAXM15066, VIN(MIN) = 7.5V, VIN(MAX) = 60V
Selection of Input Capacitor
The input filter capacitor reduces peak currents drawn
from the power source and reduces noise and voltage
ripple on the input caused by the converter’s switching.
The input capacitor RMS current requirement (IRMS) is
defined by the following equation:
=
IRMS I OUT(MAX) ×
VOUT × (VIN − VOUT )
VIN
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,
I OUT(MAX)
IRMS(MAX) =
2
Maxim Integrated │ 18
MAXM15065/MAXM15066/
MAXM15067
Choose an input capacitor that exhibits less than a +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:
C IN =
I OUT(MAX) × D MAX × (1 − D MAX )
f SW × ∆VIN
where:
DMAX = Maximum duty cycle(0.89),
fSW = Switching frequency,
∆VIN = Allowable input-voltage ripple.
Selection of Output Capacitor
Small ceramic X7R-grade capacitors are sufficient and
recommended for output-voltage generation. The output
capacitor has two functions. It provides smooth voltage
and, stores sufficient energy to support the output voltage
under load transient conditions and stabilizes the device’s
internal control loop. Usually the output capacitor is sized
to support a step load of 50% of the maximum output current in the application, such that the output-voltage deviation is less than 3%. Required output capacitance can be
calculated from the following equation:
C OUT =
20
VOUT
where COUT is the output capacitance in μF and VOUT
is the output voltage. Derating of ceramic capacitors with
DC-voltage must be considered while selecting the output
capacitor.
VIN
R1
MAXM15065
MAXM15066
MAXM15067
EN/UVLO
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
Setting the Input Undervoltage-Lockout Level
The devices offer an adjustable input undervoltage lockout level. Set the voltage at which the device turns on with
a resistive voltage-divider connected from VIN to GND
(see Figure 1). Connect the center node of the divider to
EN/UVLO.
Choose R1 to be 3.3MΩ (max), and then calculate R2 as
follows:
R1× 1.215
R2 =
VINU − 1.215
where VINU is the voltage at which the device is required
to turn on.
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 signal source output
and and the EN/UVLO pin, to reduce voltage ringing on
the line.
Output-Voltage Setting
The MAXM15067 output voltage can be programmed
from 0.9V to 6.3V. Set the output voltage by connecting a
resistor-divider from output to FB to GND (see Figure 2).
Choose R4 less than or equal to 75kΩ and calculate R3
with the following equation:
V
R3 =
R4 × OUT − 1
0.9
Connect FB of MAXM15065 and MAXM15066 directly to
VOUT for feedback control.
OUT
MAXM15067
FB
R4
R2
Figure 1. Adjustable EN/UVLO Network
www.maximintegrated.com
R3
Figure 2. Setting the Output Voltage
Maxim Integrated │ 19
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
Table 1. Selection of Components
PART
NUMBER
V IN(MIN) V IN(MAX) V OUT*
(V)
(V)
(V)
C IN
R3
(kΩ)
C OUT
R4
(kΩ)
4.5
12.5
0.9
1 x 1µF 0805 25V
(Murata GRM219R71E105KA88)
1 x 22µF 1206 6.3V
SHORT OPEN
(Murata GRM31CR70J226KE19L)
4.5
14
1
1 x 1µF 0805 25V
(Murata GRM219R71E105KA88)
1 x 22µF 1206 6.3V
(Murata GRM31CR70J226KE19L)
8.33
75
4.5
17
1.2
1 x 1µF 0805 25V
(Murata GRM219R71E105KA88)
1 x 22µF 1206 6.3V
(Murata GRM31CR70J226KE19L)
25
75
4.5
21.5
1.5
1 x 1µF 0805 25V
(Murata GRM219R71E105KA88)
1 x 10µF 1206 6.3V
(Murata GRM31CR70J106KA01)
50
75
4.5
25.5
1.8
1 x 1µF 0805 50V
(Murata GRM21BR71H105KA12)
1 x 10µF 1206 6.3V
(Murata GRM31CR70J106KA01)
75
75
4.5
36
2.5
1 x 1µF 0805 50V
(Murata GRM21BR71H105KA12)
1 x 10µF 0805 16V
(Murata GRM21BZ71C106KE15)
133
75
5.5
48
3.3
1 x 1μF 1206 100V
(Murata GRM31CR72A105KA01L)
1 x 10µF 0805 16V
(Murata GRM21BZ71C106KE15)
200
75
7.5
60
5
1 x 1μF 1206 100V
(Murata GRM31CR72A105KA01L)
1 x 10µF 0805 16V
(Murata GRM21BZ71C106KE15)
348
75
10
60
6.3
1 x 1μF 1206 100V
(Murata GRM31CR72A105KA01L)
1 x 10µF 0805 16V
(Murata GRM21BZ71C106KE15)
450
75
MAXM15065
5.5
48
3.3
1 x 1μF 1206 100V
(Murata GRM31CR72A105KA01L)
1 x 10µF 0805 16V
(Murata GRM21BZ71C106KE15)
N/A
N/A
MAXM15067
7.5
60
5
1 x 1μF 1206 100V
(Murata GRM31CR72A105KA01L)
1 x 10µF 0805 16V
(Murata GRM21BZ71C106KE15)
N/A
N/A
MAXM15067
* The modules have a pulse skip algorithm that allows VOUT to be regulated beyond the VIN(MAX) specified in the above table, up to 60V.
Power Dissipation
The power dissipation inside the module leads to
increase in the junction temperature of the MAXM15065/
MAXM15066/MAXM15067. The power loss inside the
module at full load can be estimated as follows:
1
PLOSS
= POUT × − 1
η
Where η is the efficiency of the power module at the
desired operating conditions. The junction temperature
(TJ) of the module can be estimated at any given maximum
ambient temperature (TA) from the following equation:
T=
J T A + θ JA × PLOSS
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For the MAXM15065/MAXM15066/MAXM15067 evaluation board, the thermal resistance from junction-toambient (θJA) is 41.56°C/W. Operating the module at
junction temperatures greater than +125°C degrades
operating lifetimes. An EESIM model is available for the
MAXM15065/MAXM15066/MAXM15067 to simulate efficiency and power loss for the desired operating conditions.
PCB Layout Guidelines
Use the following guidelines for good PCB layout:
●● Keep the input capacitors as close as possible to the
IN and GND pins.
●● Keep the output capacitors as close as possible to
the OUT and GND pins.
●● Keep the resistive feedback dividers as close as
possible to the FB pin.
●● Keep the power traces and load connections short.
Refer to the EV kit layout for first-pass success.
Maxim Integrated │ 20
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
VIN
VOUT
VIN
CIN
OUT
RESET
R1
COUT
R3
MAXM15067
R2
EN/UVLO
FB
VCC
LX
CVCC
R4
MODE
GND
CIN
VIN PLANE
GND PLANE
1
+
LX
MAXM15067
10
VIN
9
VIN
GND
2
RESET
3
8
EN/UVLO
MODE
4
7
VCC
OUT
5
6
R1
R2
CVCC
FB
VOUT PLANE
COUT
GND PLANE
R3
R4
VIA TO INNER LAYER FOR ROUTING FB
Figure 3. Adjustable Output Layout Guidelines
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Maxim Integrated │ 21
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
VIN
VOUT
VIN
CIN
RESET
R1
R2
OUT
COUT
MAXM15065
MAXM15066
EN/UVLO
FB
VCC
LX
CVCC
MODE
GND
CIN
GND PLANE
1
+
LX
MAXM15065
MAXM15066
VIN PLANE
10
VIN
9
VIN
GND
2
RESET
3
8
EN/UVLO
MODE
4
7
VCC
OUT
5
6
R1
R2
CVCC
FB
VOUT PLANE
COUT
GND PLANE
VIA TO INNER LAYER FOR ROUTING FB
Figure 4. Fixed Output Layout Guidelines
www.maximintegrated.com
Maxim Integrated │ 22
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Application Circuits
Typical Application Circuit for Adjustable 3.3V Output
VIN
5.5V TO 48V
C1
1µF
VOUT
3.3V, 300mA
VIN
OUT
EN/UVLO
GND
C2
10µF
R1
200kΩ
MAXM15067
C3
1µF
RESET
FB
VCC
LX
R2
75kΩ
MODE
MODE = GND FOR PWM
MODE = OPEN FOR PFM
C1 = MURATA 1μF/X7R/100V/1206 (GRM31CR72A105KA01L)
C2 = MURATA 10μF/X7R/16V/0805 (GRM21BZ71C106KE15)
C3 = MURATA 1μF/X7R/6.3V/0603 (GRM188R70J105K)
Typical Application Circuit for Adjustable 2.5V Output
VIN
4.5V TO 36V
C1
1µF
VOUT
2.5V, 300mA
VIN
OUT
EN/UVLO
GND
C2
10µF
R1
133kΩ
MAXM15067
C3
1µF
RESET
FB
VCC
LX
R2
75kΩ
MODE
MODE = GND FOR PWM
MODE = OPEN FOR PFM
C1 = MURATA 1μF/X7R/50V/0805 (GRM21BR71H105KA12L)
C2 = MURATA 10μF/X7R/16V/0805 (GRM21BZ71C106KE15)
C3 = MURATA 1μF/X7R/6.3V/0603 (GRM188R70J105K)
www.maximintegrated.com
Maxim Integrated │ 23
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Application Circuits (continued)
Typical Application Circuit for Adjustable 1.5V Output
VIN
4.5V TO 21.5V
C1
1µF
VOUT
1.5V, 300mA
VIN
OUT
EN/UVLO
GND
C2
10µF
R1
50kΩ
MAXM15067
C3
1µF
RESET
FB
VCC
LX
R2
75kΩ
MODE
MODE = GND FOR PWM
MODE = OPEN FOR PFM
C1 = MURATA 1μ F/X7R/25V/0805 (GRM219R71E105KA88D)
C2 = MURATA 10μ F/X7R/6.3V/1206 (GRM31CR70J106KA01)
C3 = MURATA 1μ F/X7R/6.3V/0603 (GRM188R70J105K)
Typical Application Circuit for Fixed 3.3V Output
VIN
5.5V TO 48V
C1
1µF
VOUT
3.3V, 300mA
VIN
OUT
EN/UVLO
C2
10µF
GND
MAXM15065
C3
1µF
RESET
FB
VCC
LX
MODE
MODE = GND FOR PWM
MODE = OPEN FOR PFM
C1 = MURATA 1μF/X7R/100V/1206 (GRM31CR72A105KA01L)
C2 = MURATA 10μF/X7R/16V/0805 (GRM21BZ71C106KE15)
C3 = MURATA 1μF/X7R/6.3V/0603 (GRM188R70J105K)
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Maxim Integrated │ 24
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Application Circuits (continued)
Typical Application Circuit for Fixed 5V Output
VIN
8.5V TO 60V
C1
1µF
VOUT
5V, 300mA
VIN
OUT
EN/UVLO
GND
C2
10µF
MAXM15066
C3
1µF
RESET
FB
VCC
LX
MODE
MODE = GND FOR PWM
MODE = OPEN FOR PFM
C1 = MURATA 1μF/X7R/100V/1206 (GRM31CR72A105KA01L)
C2 = MURATA 10μF/X7R/16V/0805 (GRM21BZ71C106KE15)
C3 = MURATA 1μF/X7R/6.3V/0603 (GRM188R70J105K)
Ordering Information
PART
NUMBER
TEMP
RANGE
PIN-PACKAGE
MAXM15065AMB+
-40°C to +125°C
10-pin uSLIC
MAXM15065AMB+T
-40°C to +125°C
10-pin uSLIC
MAXM15066AMB+
-40°C to +125°C
10-pin uSLIC
MAXM15066AMB+T
-40°C to +125°C
10-pin uSLIC
MAXM15067AMB+
-40°C to +125°C
10-pin uSLIC
MAXM15067AMB+T
-40°C to +125°C
10-pin uSLIC
+ Denotes a lead(Pb)-free/RoHS-compliant package.
T Denotes tape-and-reel.
www.maximintegrated.com
Maxim Integrated │ 25
MAXM15065/MAXM15066/
MAXM15067
4.5V to 60V, 300mA Himalaya uSLIC
Step-Down Power Module
Revision History
REVISION
NUMBER
REVISION
DATE
0
3/19
DESCRIPTION
Initial release
PAGES
CHANGED
—
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. │ 26
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