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400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
●● Supercapacitor Backup for RTC/Alarm Buzzers
●● Primary-Cell Portable Systems
●● Tiny, Low-Power IoT Sensors
●● Secondary-Cell Portable Systems
●● Wearable Devices
●● Battery-Powered Medical Equipment
●● Low-Power Wireless Communication Products
●● True Shutdown Mode
• 0.5nA Shutdown Current
• Output Disconnects from Input
• No Reverse Current with VOUT 0V to 5V
●● 95% Peak Efficiency
●● 400mV to 5.5V Input Range
●● 0.88V Minimum Startup Voltage
●● 1.8V to 5V Output Voltage Range
• 100mV/Step
• Single 1% Resistor Selectable Output
●● 225mA, 500mA, and 1A Peak Inductor Current Limit
• MAX17220/MAX17221: 225mA ILIM
• MAX17222/MAX17223: 500mA ILIM
• MAX17224/MAX17225: 1A ILIM
●● MAX17220/MAX17222/MAX17224 Enable Transient
Protection (ETP)
●● 2mm x 2mm 6-Pin μDFN
●● 0.88mm x 1.4mm 6-Bump WLP (2 x 3, 0.4mm Pitch)
Typical Operating Circuit
IN
400mV TO 5.5V
OUT
MAX1722X
GND
SEL
STARTUP
0.88 (TYP)
RSEL
True Shutdown is a trademark of Maxim Integrated Products, Inc.
19-8753; Rev 5; 12/19
2.2µH
EN
CIN
10µF
Ordering Information appears at end of data sheet.
L1
OUT
●● Optical Heart-Rate Monitoring (OHRM) LED Drivers
●● 300nA Quiescent Supply Current Into OUT
GND
Applications
Benefits and Features
LX
The MAX17220–MAX17225 is a family of ultra-low
quiescent current boost (step-up) DC-DC converters with
a 225mA/0.5A/1A peak inductor current limit and True
Shutdown™. True Shutdown disconnects the output from
the input with no forward or reverse current. The output
voltage is selectable using a single standard 1% resistor.
The 225mA (MAX17220/MAX17221), 500mA (MAX17222/
MAX17223), and 1A (MAX17224/MAX17225) peak inductor
current limits allow flexibility when choosing inductors. The
MAX17220/MAX17222/MAX17224 versions have poststartup enable transient protection (ETP), allowing the
output to remain regulated for input voltages down to
400mV, depending on load current. The MAX17220–
MAX17225 offer ultra-low quiescent current, small total
solution size, and high efficiency throughout the entire load
range. The MAX17220–MAX17225 are ideal for battery
applications where long battery life is a must.
IN
General Description
EN
MAX17220‒MAX17225
COUT
10µF
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
Absolute Maximum Ratings
OUT, EN, IN to GND................................................-0.3V to +6V
RSEL to GND................. -0.3V to Lower of (VOUT + 0.3V) or 6V
LX RMS Current WLP.............................-1.6ARMS to +1.6ARMS
LX RMS Current µDFN.................................-1ARMS to +1ARMS
Continuous Power Dissipation (TA = 70°C)
WLP (derate 10.5mW/°C above +70°C).......................840mW
Continuous Power Dissipation (TA = 70°C)
µDFN (derate 4.5mW/°C above +70°C)....................357.8mW
Operating Temperature Range.......................... -40°C to +125°C
Junction Temperature.......................................................+150°C
Storage Temperature Range............................. -40°C to +150°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
µDFN
PACKAGE CODE
L622+1C
Outline Number
21-0164
Land Pattern Number
90-0004
Thermal Resistance, Four-Layer Board:
Junction to Ambient (θJA)
223.6°C/W
Junction to Case (θJC)
122°C/W
WLP
PACKAGE CODE
N60E1+1
Outline Number
21-100128
Land Pattern Number
Refer to Application Note 1891
Thermal Resistance, Four-Layer Board:
Junction to Ambient (θJA)
95.15°C/W
Junction to Case (θJC)
N/A
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.
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board.
For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
www.maximintegrated.com
Maxim Integrated │ 2
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
Electrical Characteristics
(VIN = VEN = 1.5V, VOUT = 3V, TA = -40°C to +125°C, typical values are at TA = +25°C, unless otherwise noted. (Note 1))
PARAMETER
Minimum Input Voltage
Input Voltage Range
SYMBOL
CONDITIONS
VIN_MIN
Runs from output after startup, IOUT = 1mA
VIN
Minimum Startup Input
Voltage
VIN_STARTUP
Output Voltage Range
VOUT
Output Accuracy, LPM
Output Accuracy,
Ultra-Low-Power Mode
Quiescent Supply Current
Into OUT
Guaranteed by LX Maximum On-Time
MIN
Total Quiescent Supply
Current into IN LX EN
Shutdown Current Into IN
Total Shutdown Current
into IN LX
Inductor Peak Current
Limit
RL ≥ 3kΩ, Typical Operating Circuit,
TA = +25°C
0.88
UNITS
mV
5.5
V
0.95
V
See RSEL Selection table.
For VIN < VOUT target (Note 2)
1.8
5
V
ACCLPM
VOUT falling, when LX switching frequency
is > 1MHz (Note 3)
-1.5
+1.5
%
ACCULPM
VOUT falling, when LX switching frequency
is > 1kHz (Note 4)
1
2.5
4
%
IQ_OUT
MAX17220/2/4
EN = open after startup,
MAX17221/3/5 EN = VIN,
not switching, RSEL OPEN,
VOUT = 104% of 1.8V
TA= +25°C.
300
600
MAX17220/2/4
EN = open after startup,
MAX17221/3/5 EN = VIN,
not switching, RSEL OPEN,
VOUT = 104% of 1.8V
TA = +85°C
470
900
1000
2000
IQ_IN
IQ_IN_TOTAL
ISD_IN
ISD_TOTAL
IPEAK
TA = 25°C
0.1
MAX17220/2/4 EN = Open after startup.
MAX17221/3/5 EN = VIN, not switching,
VOUT = 104% of VOUT target, total current
includes IN, LX, and EN, TA = +25ºC
0.5
MAX17220/1/2/3/4/5, RL= 3kΩ,
VOUT = VEN = 0V, TA = 25ºC
0.1
MAX17220/1/2/3/4/5, RL= 3kΩ, VEN = VIN
= VLX = 3V, includes LX and IN leakage,
TA = +25ºC
0.5
(Note 5)
LX Maximum Duty Cycle
DC
(Note 6)
LX Maximum On-Time
tON
(Note 6)
www.maximintegrated.com
MAX
400
0.95
MAX17220/2/4
EN = open after startup
MAX17221/3/5 EN = VIN,
TA = +125°C
not switching, RSEL OPEN,
VOUT = 104% of 1.8V
Quiescent Supply Current
Into IN
TYP
nA
nA
100
nA
nA
100
nA
mA
MAX17220/1
180
225
270
MAX17222/3
0.4
0.5
0.575
MAX17224/5
0.8
1
1.2
70
75
VOUT = 1.8V
280
365
450
VOUT = 3V
270
300
330
A
%
ns
Maxim Integrated │ 3
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
Electrical Characteristics (continued)
(VIN = VEN = 1.5V, VOUT = 3V, TA = -40°C to +125°C, typical values are at TA = +25°C, unless otherwise noted. (Note 1))
PARAMETER
LX Minimum Off-Time
LX Leakage Current
N-Channel On-Resistance
P-Channel On-Resistance
Synchronous Rectifier
Zero-Crossing as Percent
of Peak Current Limit
SYMBOL
tOFF
ILX_LEAK
RDS(ON)
RDS(ON)
IZX
VIL
Enable Voltage Threshold
VIH
CONDITIONS
(Note 6)
VOUT = VEN = 0V,
MAX17220
VOUT = 3.3V
VOUT = 3.3V
MIN
TYP
MAX
VOUT = 1.8V
90
120
150
VOUT = 3V
80
100
120
VLX = 1.5V,
TA = 25°C
0.3
VLX = 5.5V,
TA= 85°C
30
VLX = 5.5V,
TA= 125°C
400
MAX17220/1
124
270
MAX17222/3
62
135
31
70
MAX17220/1
300
600
MAX17222/3
150
300
MAX17224/5
75
150
7.5
2.5
5
When LX switching stops, EN falling,
TA = -40°C to +85°C
250
500
When LX switching stops, EN falling,
TA = -40°C to +125°C
150
EN rising, TA = -40°C to +85°C
600
EN rising, TA = -40°C to +125°C
mΩ
%
850
900
0.1
MAX17220/2/4, VEN = 0V, TA= +25°C,
0.1
Enable Input Impedance
MAX17220/2/4
100
Required Select Resistor
Accuracy
RSEL
Use the nearest ±1% resistor from
RSEL Selection Table
Select Resistor Detection
Time
tRSEL
VOUT = 1.8V, CRSEL < 2pF (Note 8)
IEN_LK
mΩ
mV
MAX17221/3/5, VEN = 5.5V, TA = +25°C
Enable Input Leakage
ns
nA
MAX17224/5
VOUT = 3.3V (Note 7)
UNITS
-1
360
600
nA
200
kΩ
+1
%
1320
μs
Note 1: Limits are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed through
correlation using statistical quality control (SQC) methods.
Note 2: Guaranteed by the Required Select Resistor Accuracy parameter.
Note 3: Output Accuracy, Low Power mode is the regulation accuracy window expected when IOUT > IOUT_TRANSITION. See PFM
Control Scheme and VOUT ERROR vs ILOAD TOC for more details. This accuracy does not include load, line, or ripple.
Note 4: Output Accuracy, Ultra-Low Power mode is the regulation accuracy window expected when IOUT < IOUT_TRANSITION. See
PFM Control Scheme and VOUT ERROR vs. ILOAD TOC for more details. This accuracy does not include load, line, or ripple.
Note 5: This is a static measurement. See ILIM vs. VIN TOC. The actual peak current limit depends upon VIN and L due to propagation
delays.
Note 6: Guaranteed by measuring LX frequency and duty cycle
Note 7: This is a static measurement.
Note 8: This is the time required to determine RSEL value. This time adds to the startup time. See Output Voltage Selection.
www.maximintegrated.com
Maxim Integrated │ 4
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
Typical Operating Characteristics
(MAX17222ELT+, IN = 1.5V, OUT = 3V, L = 2.2μH Coilcraft XFL4020-222, CIN = 10μF, COUT = 10μF, TA = +25°C, unless otherwise noted.)
TOTAL SYSTEM SUPPLY CURRENT
vs. TEMPERATURE
TOTAL SYSTEM SHUTDOWN CURRENT
vs. TEMPERATURE
toc01
75
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
toc02
1400.0
70
300
VOUT = 3V,
L = 1µH
1200.0
WITH EXTERNAL RESISTOR
FROM IN TO EN
250
1100.0
IOUT MAX (mA)
60
ISUPPLY (nA)
ISUPPLY (nA)
65
EN = OPEN
1000.0
900.0
55
200
150
800.0
50
0
500.0
-25
0
25
50
75
-40
100
-15
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
IOUT MAX (mA)
250.0
VOUT = 5V,
L = 2.2µH
150.0
100.0
VOUT = 3.3V,
L = 2.2µH
50.0
800
INDUCTOR CURRENT LIMIT (mA)
VOUT = 3V,
L = 2.2µH
200.0
60
0.5
85
0.0
VOUT = 5V,
L = 1µH
700
toc05
1.5
2.5
3.5
EFFICIENCY vs. LOAD CURRENT
(VOUT = 3.3V)
VOUT = 3.3V,
L = 2.2µH
400
300
VOUT = 5V,
L = 2.2µH
200
1.50
2.00
2.50
VIN = 2V
VIN = 1V
50
10
100
1000 10000 100000 1000000
LOAD CURRENT (µA)
www.maximintegrated.com
VIN = 0.8V
100
SWITCHING FREQUENCY
vs. LOAD CURRENT
toc08
3
1000
2
1.5
RS = 30Ω
1
RS = 5Ω
0.5
10000
1000000
LOAD CURRENT (µA)
RS = 1Ω
40
1
-2
1
SWITCHING FREQUENCY (KHZ)
60
VIN = 1.5V
VIN = 1.5V
-1
STARTUP VOLTAGE vs. LOAD CURRENT
(VOUT = 3.3V)
OPEN-CIRCUIT VOLTAGE (V)
VIN = 2.5V
VIN = 1V
0
3.00
2.5
70
1
-4
1.00
RS IS THE SOURCE RESISTANCE
80
toc06
VIN = 2V
INPUT VOLTAGE (V)
90
3.0
-3
0.50
toc07
2.5
2
500
4.5
2.0
VIN = 2.5V
3
600
INPUT VOLTAGE (V)
100
1.5
OUTPUT VOLTAGE ERROR
vs. LOAD CURRENT
(VOUT = 3.3V)
4
VOUT = 3.3V,
L = 1µH
100
0.5
1.0
INPUT VOLTAGE (V)
MAX17222ELT+
INDUCTOR CURRENT LIMIT
vs. INPUT VOLTAGE
toc04
400.0
300.0
35
TEMPERATURE (ºC)
TEMPERATURE (ºC)
350.0
10
OUTPUT ERROR (%)
-50
VOUT = 5V,
L = 1µH
50
600.0
40
EFFICIENCY (%)
VOUT = 3.3V,
L = 1µH
100
700.0
45
toc03
350
1300.0
toc09
VIN = 1.5V, VOUT = 3V
100
10
1
VIN = 3.2V, VOUT = 5V
0
0
0
0.1
10
1000
LOAD CURRENT (µA)
100000
1
10
100
1000
10000 100000 1000000
LOAD CURRENT (µA)
Maxim Integrated │ 5
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
Typical Operating Characteristics (continued)
(MAX17222ELT+, IN = 1.5V, OUT = 3V, L = 2.2μH Coilcraft XFL4020-222, CIN = 10μF, COUT = 10μF, TA = +25°C, unless otherwise noted.)
INTO AND OUT OF ULPM
LOAD TRANSIENT
INTO AND OUT OF LPM
LOAD TRANSIENT
toc10
toc11
VLX
2V/div
IOUT
100mA/div
ILX
500mA/div
100mV/div
(AC-COUPLED)
VOUT
VIN = 1.5V, VOUT = 3V, IOUT = 0 TO 180mA
200µs/div
www.maximintegrated.com
VLX
2V/div
IOUT
100mA/div
ILX
500mA/div
VOUT
100mV/
AC-COUPLED)
VIN = 1.5V, VOUT = 3V, IOUT = 10mA TO 180mA
200µs/div
Maxim Integrated │ 6
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
Typical Operating Characteristics (continued)
(MAX17222ELT+, IN = 1.5V, OUT = 3V, L = 2.2μH Coilcraft XFL4020-222, CIN = 10μF, COUT = 10μF, TA = +25°C, unless otherwise noted.)
/div
MAX17220ENT+ INDUCTOR CURRENT LIMIT
vs. INPUT VOLTAGE
toc18
600
INDUCTOR CURRENT LIMIT (mA)
550
VOUT = 5V , L = 1µH
500
VOUT = 3.3V, L = 1µH
450
VOUT = 3.3V,
L = 2.2µH
400
VOUT = 5V,
L = 2.2µH
350
300
250
200
VOUT = 5V, L = 4.7µH
150
VOUT = 3.3V, L = 4.7µH
100
0.50
1.50
2.50
3.50
4.50
INPUT VOLTAGE (V)
www.maximintegrated.com
Maxim Integrated │ 7
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
Bump Configuration
TOP VIEW
TOP VIEW
+
MAX1722x
+
OUT
LX
GND
1
6
MAX1722x
2
3
5
4
EN
A
OUT
LX
GND
B
EN
IN
SEL
1
2
3
IN
SEL
µDFN
WLP
Bump Description
PIN
NAME
FUNCTION
OUT
Output Pin. Connect a 10µF X5R ceramic capacitor (minimum 2µF capacitance) to ground.
6 WLP
µDFN
A1
1
A2
2
LX
A3
3
GND
B1
6
EN
Active-High Enable Input. See Supply Current section for recommended connections.
B2
5
IN
Input Pin. Connect a 10µF X5R ceramic capacitor (minimum 2µF capacitance) to ground.
Depending on the application requirements, more capacitance may be needed (i.e., BLE).
B3
4
SEL
www.maximintegrated.com
Switching Node Pin. Connect the inductor from IN to LX.
Ground Pin.
Output Voltage Select Pin. Connect a resistor from SEL to GND based on the desired
output voltage. See RSEL Selection table.
Maxim Integrated │ 8
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
Functional Diagrams
2.2µH
LX
MAX17220/1/2/3/4/5
TRUE
SHUTDOWN
IN
STARTUP
CIN
10µF
OUT
COUT
10µF
CURRENT
SENSE
MODULATOR
REFERENCE
EN
OPTIONAL
ENABLE PIN
TRANSIENT
PROTECTION
OUTPUT
VOLTAGE
SELECTOR
SEL
RSEL
GND
www.maximintegrated.com
Maxim Integrated │ 9
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
Detailed Description
(Figure 2, Figure 3)
Figure 3 shows a typical connection of the MAX17220/2/4
with a push-button switch to minimize the ISD_TOTAL_
SYSTEM current. ISD_TOTAL_SYSTEM current can be
calculated using the formula above. For example, a
MAX17220/2/4 with EN connected as shown in Figure 3,
with VIN = 1.5V and VOUT = 3V, the ISD_TOTAL_SYSTEM
current is 0.5nA.
www.maximintegrated.com
OUT
LX
IN
EN
GND
OUT
LX
IN
MAX17221/3/5
VIO
GND
µC
Figure 2. Only the MAX17221/3/5’s EN Pin Can Be Driven by a
Push-Pull Microcontroller GPIO.
Figure 2 shows a typical connection of the MAX17221/3/5
to a push-pull microcontroller GPIO. ISD_TOTAL_SYSTEM
current can be calculated using the formula below. For
example, a MAX17221/3/5 with EN connected to a pushpull microcontroller GPIO, VIN = 1.5V, and VOUT = 3V,
ISD_TOTAL_SYSTEM current is 0.5nA.
I SD_TOTAL_SYSTEM = I SD_TOTAL = 0.5nA
SEL
OUT
IN
EN
OUT
µC
GPIO
MAX17220/
MAX17222/
MAX17224
OUT
1.5
=0.5nA +
= 45.9nA, (Figure 1)
33MΩ
IN
GND
VIN
R PULLUP
Figure 1. For All Versions, EN Pin Can Be Driven by an OpenDrain Microcontroller GPIO.
LX
I SD_TOTAL_SYSTEM = I SD_TOTAL +
MAX17220/1/2/3/4/5
IN
The total system shutdown current (ISD_TOTAL_SYSTEM)
is made up of the MAX17220/1/2/3/4/5's total shutdown current (ISD_TOTAL) and the current through an
external pullup resistor, as shown in Figure 1. ISD_TOTAL
is listed in the Electrical Characteristics table and is
typically 0.5nA. It is important to note that ISD_TOTAL includes
LX and IN leakage currents. (See the Shutdown Supply
Current vs. Temperature graph in the Typical Operating
Characteristics section.) ISD_TOTAL_SYSTEM current can
be calculated using the formula below. For example, for
the MAX17220/1/2/3/4/5 with EN connected to an opendrain GPIO of a microcontroller, a VIN = 1.5V, VOUT
= 3V, and a 33MΩ pullup resistor, ISD_TOTAL_SYSTEM
current is 45.9nA.
µC
OPEN-DRAIN
GPIO
EN
True Shutdown Current
OUT
SEL
Supply Current
33MΩ
RPULLUP
IN
SEL
The MAX17220/1/2/3/4/5 compact, high-efficiency, stepup DC-DC converters have ultra-low quiescent current,
are guaranteed to start up with voltages as low as 0.95V,
and operate with an input voltage down to 400mV,
depending on load current. True Shutdown disconnects
the input from the output, saving precious battery life.
Every detail of the MAX17220/1/2/3/4/5 was carefully
chosen to allow for the lowest power and smallest solution
size. Such details as switching frequencies up to 2.5MHz,
tiny package options, a single-output setting resistor,
300ns fixed turn-on time, as well as three current limit
options, allow the user to minimize the total solution size.
33MΩ
Figure 3. The MAX17220/2/4’s Total System Shutdown Current
Will Only Be Leakage If Able To Use Push-Button As Shown.
Maxim Integrated │ 10
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
Enable Transient Protection (ETP) Current
The MAX17220/2/4 have internal circuitry that helps
protect against accidental shutdown by transients on the
EN pin. Once the part is started up, these parts allow the
voltage at IN to drop as low as 400mV while still keeping
the part enabled, depending on the load current. This
feature comes at the cost of slightly higher supply
current that is dependent on the pullup resistor resistance.
The extra supply current for this protection option can be
calculated by the equation below. For example, for the
MAX17220/2/4 used in the Figure 1 connection, a VIN
= 1.5V, VOUT = 3V, a 33MΩ pullup resistor and an 85%
efficiency, the IQ_ETP is expected to be 61.3nA.
IQ_ETP =
IQ_ETP =
1 V
(VOUT - VIN )
× × OUT -1,
(R PULLUP + 100k) η
VIN
(Figure1)
(3V-1.5V)
3V
1
×
×
-1 =
61.3nA,
(33M +100k) 0.85 1.5
(Figure1)
Use the efficiency η from the flat portion of the efficiency
typical operating curves while the device is in ultra-lowpower mode (ULPM). See the PFM Control Scheme
section for more info on ULPM. Do not use the efficiency
for your actual load current. If you are using the versions
of the part without enable input transient protection (using
MAX17221/3/5), or if you are using any part version and
the electrical path from the EN pin is opened after startup,
then there is no IQ_ETP current and it will be zero.
IQ_ETP = N/A = 0, (Figure 2)
IQ_ETP =
IQ_ETP =
213.2nA,
=
Quiescent Current
The MAX17221/2/3/4/5 has ultra-low quiescent current
and was designed to operate at low input voltages by
bootstrapping itself from its output by drawing current
from the output. Use the equation below to calculate
www.maximintegrated.com
IQ_TOTAL_SYSTEM = IQ_IN_TOTAL +
IQ_OUT
V
η × IN
V
OUT
(MAX17221/3/5)
300nA
= 706.4nA,
1.5V
0.85 ×
3V
(MAX17221/3/5)
IQ_TOTAL_SYSTEM = 0.5nA +
IQ_TOTAL_SYSTEM = IQ_IN_TOTAL +
IQ_OUT
+ IQ_ETP,
V
η × IN
VOUT
(MAX17220/2/4)
300nA
+ 61.3nA = 767.7nA,
1.5V
0.85 ×
3V
(MAX17220/2/4)
IQ_TOTAL_SYSTEM = 0.5nA +
PFM Control Scheme
1 V
(VOUT )
× × OUT ,
(R PULLUP + 100k) η
VIN
(Figure 3)
(3V)
3V
1
×
×
(33M + 100k) 0.85 1.5V
(Figure 3)
the total system quiescent current IQ_TOTAL_SYSTEM
using the efficiency η from the flat portion of the
efficiency graph in the Typical Operating Characteristics
section while the device is in ULPM. See the PFM control
scheme section for more info on ULPM. Do not use the
efficiency for your actual load current. To calculate the
IQ_ETP for the MAX17220/2/4, see the Enable Transient
Protection (ETP) Current section. If you are using the
versions of the part without enable input transient protection
(using MAX17221/3/5) or if you are using any part version
and the electrical path from the EN pin is opened after startup,
then the IQ_ETP current will be zero. For example, for the
MAX17221/3/5, a VIN = 1.5V, VOUT = 3V, and an 85%
efficiency, the IQ_TOTAL_SYSTEM is 706.4nA.
The MAX17221/2/3/4/5 utilizes a fixed on-time, currentlimited, pulse-frequency-modulation (PFM) control
scheme that allows ultra-low quiescent current and high
efficiency over a wide output current range. The inductor
current is limited by the 0.225A/0.5A/1A N-channel
current limit or by the 300ns switch maximum on-time.
During each on cycle, either the maximum on-time or the
maximum current limit is reached before the off-time of
the cycle begins. The MAX17221/2/3/4/5's PFM control
scheme allows for both continuous conduction mode
(CCM) or discontinuous conduction mode (DCM). When
the error comparator senses that the output has fallen
below the regulation threshold, another cycle begins. See
the MAX17221/2/3/4/5 simplified functional diagram.
Maxim Integrated │ 11
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
The MAX17221/2/3/4/5 automatically switches between
the ULPM, low-power mode (LPM) and high-power mode
(HPM), depending on the load current. Figure 4 and
Figure 5 show typical waveforms while in each mode.
The output voltage, by design, is biased 2.5% higher
while in ULPM so that it can more easily weather a future
large load transient. ULPM is used when the system is
in standby or an ultra-low-power state. LPM and HPM
are useful for sensitive sensor measurements or during
wireless communications for medium output currents
and large output currents respectively. The user can
calculate the value of the load current where ULPM transi-
VOUT
ULTRA-LOW POWER MODE (UPLM): LIGHT LOADS
DCM
VOUT TARGET + 2.5%
LOW POWER MODE (LPM): MEDIUM LOADS
DCM
VOUT TARGET
17.5µs
5µs
CCM
VOUT TARGET - LOAD REG
LOAD DEPENDENT
750ns
HIGH POWER MODE (HPM): HEAVY LOADS
TIME
Figure 4. ULPM, LPM, and HPM Waveforms (Part 1).
VOUT
ULTRA LOW POWER MODE (UPLM): LIGHT LOADS
DCM
100ms
VOUT TARGET + 2.5%
LOW POWER MODE (LPM): MEDIUM LOADS
17.5µs
DCM
VOUT TARGET
7µs
CCM
VOUT TARGET - LOAD REG
650ns
LOAD DEPENDENT
HIGH POWER MODE (HPM): HEAVY LOADS
TIME
Figure 5. ULPM, LPM, and HPM Waveforms (Part 2).
www.maximintegrated.com
Maxim Integrated │ 12
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
tions to LPM using the equation below. For example, for
VIN = 1.5V, VOUT = 3V and L = 2.2µH, the UPLM to LPM
transition current happens at approximately 1.49mA and
a no-load frequency of 11.5Hz. The MAX17221/2/3/4/5
enters HPM when the inductor current transitions from
DCM to CCM.
for example, during installation of a fresh battery. While in
regulation if VIN steps abruptly above VOUT for more than
1V (typical), the device will reset. Output voltage droop
in this case will be a function of the load current, output
capacitance and time required for soft start to complete
which is 1.5ms typical.
300ns 2 V
IN × η
×
IOUT_TRANSITION =
2L VOUT 17.5µs
- 1
VIN
Design Procedure
Operation with VIN > VOUT
If the input voltage (VIN) is greater than the output voltage
(VOUT) by a diode drop (VDIODE varies from ~0.2V at
light load to ~0.7V at heavy load), then the output voltage
is clamped to a diode drop below the input voltage (i.e.,
VOUT = VIN - VDIODE).
When the input voltage is closer to the output voltage target
(i.e., VOUT target + VDIODE > VIN > VOUT target) the
MAX17220–MAX17225 operate like a buck converter.
IN
OUT
EN
OUT
1
300nA
×
= 11.5Hz
17.5µs 1.49mA
MAX1722X
GND
GND
f SW(MIN) =
LX
1
IQ
×
17.5µs IOUT_TRANSITION
IN
f SW(MIN)
=
EN
The minimum switching frequency can be calculated by
this equation below:
The MAX17221/2/3/4/5 has a unique single-resistor output
selection method known as RSEL, as shown in Figure 6.
At startup, the MAX17221/2/3/4/5 uses up to 200µA only
during the select resistor detection time, typically for
600µs, to read the RSEL value. RSEL has many benefits,
which include lower cost and smaller size, since only one
resistor is needed versus the two resistors needed in typical
feedback connections. Another benefit is RSEL allows
our customers to stock just one part in their inventory
system and use it in multiple projects with different output
voltages just by changing a single standard 1% resistor.
Lastly, RSEL eliminates wasting current continuously through
feedback resistors for ultra low power battery operated
products. Select the RSEL resistor value by choosing the
desired output voltage in the RSEL Selection Table.
SEL
300ns 2 1.5V 0.85
×
=
×
= 1.49mA
2 × 2.2µH 3V
- 1 17.5µs
1.5V
Output Voltage Selection
RSEL
Hot Plugging
The MAX17221/2/3/4/5 will initiate a controlled soft start
in an event supply voltage is reapplied at high dV/dt rate;
www.maximintegrated.com
Figure 6. Single RSEL Resistor Sets the Output Voltage.
Maxim Integrated │ 13
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
RSEL Selection Table
Inductor Selection
V OUT
(V)
STD RES
1% (kΩ)
1.8
OPEN
1.9
909
2.0
768
2.1
634
2.2
536
2.3
452
2.4
383
2.5
324
2.6
267
2.7
226
2.8
191
2.9
162
3.0
133
3.1
113
3.2
95.3
3.3
80.6
3.4
66.5
3.5
56.2
3.6
47.5
3.7
40.2
3.8
34
3.9
28
4.0
23.7
4.1
20
4.2
16.9
4.3
14
4.4
11.8
4.5
10
4.6
8.45
4.7
7.15
4.8
5.9
4.9
4.99
5.0
SHORT
www.maximintegrated.com
A 2.2µH inductor value provides the best size and efficiency
tradeoff in most applications. Smaller inductance values
typically allow for the smallest physical size and larger
inductance values allow for more output current assuming
continuous conduction mode (CCM) is achieved. Most
applications are expected to use a 2.2µH, as shown in
the example circuits. For low input voltages, 1µH will
work best. If one of the example application circuits do not
provide Enough output current, use the equations below
to calculate a larger inductance value that meets the
output current requirements, assuming it is possible to
achieve. For the equations below, choose an IIN between
0.9 x ILIM and half ILIM. It is not recommended to use an
inductor value smaller than 1µH or larger than 4.7µH. See
the Typical Operating Characteristics section for choosing
the value of efficiency η using the closest conditions for
your application. An example calculation has been
provided for the MAX17222 that has an ILIM = 500mA,
a VIN (min) = 1.8V, a VOUT = 3V, and a desired IOUT
of 205mA, which is beyond one of the 2.2µH example
circuits. The result shows that the inductor value can be
changed to 3.3µH to achieve a little more output current.
IIN =
VOUT × I OUT 3V × 205mA
=
= 402mA;
η × VIN
0.85 × 1.8V
ILIM< IIN < 0.9 × ILIM
∆I=(ILIM - IIN ) × 2 = (500mA - 402mA) × 2 = 196mA
VIN × t ON(MAX) 1.8V × 300ns
L MIN=
=
= 2.76µH
∆I
196mA
= > 3.3µH closest standard value
Capacitor Selection
Input capacitors reduce current peaks from the battery
and increase efficiency. For the input capacitor, choose a
ceramic capacitor because they have the lowest equivalent
series resistance (ESR), smallest size, and lowest cost.
Choose an acceptable dielectric such as X5R or X7R.
Other capacitor types can be used as well but will have
larger ESR. The biggest down side of ceramic capacitors is
their capacitance drop with higher DC bias and because
of this at minimum a standard 10µF ceramic capacitor
is recommended at the input for most applications. The
minimum recommended capacitance (not capacitor) at
the input is 2µF for most applications. For applications
that use batteries that have a high source impedance
greater than 1Ω, more capacitance may be needed. A
good starting point is to use the same capacitance value at
the input as for the output.
Maxim Integrated │ 14
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
The minimum output capacitance that ensures stability is
2µF. At minimum a standard 10µF X5R (or X7R) ceramic
capacitor is recommended for most applications. Due to
DC bias effects the actual capacitance can be 80% lower
than the nominal capacitor value. The output ripple can be
calculated with the equation below. For example, For the
MAX17220/2/3/4/5 with a VIN = 1.5V, VOUT = 3V, and an
effective capacitance of 5µF, a capacitor ESR of 4mΩ, the
expected ripple is 7mV.
COUT (Effective) = 5µF, ESR_COUT for Murata
GRM155R61A106ME44 is 4mΩ from 200kHz to 2MHz
V_RIPPLE = IL_PEAK × ESR_COUT
Careful PC board layout is especially important in a nanocurrent DC-DC converters. In general, minimize trace
lengths to reduce parasitic capacitance, parasitic resistance
and radiated noise. Remember that every square of 1oz
copper will result in 0.5mΩ of parasitic resistance. The
connection from the bottom of the output capacitor and
the ground pin of the device must be extremely short
as should be that of the input capacitor. Keep the main
power path from IN, LX, OUT, and GND as tight and short
as possible. Minimize the surface area used for LX since
this is the noisiest node. Lastly, the trace used for RSEL
should not be too long nor produce a capacitance of more
than a few pico Farads.
+
1
1
IL_PEAK × t OFF ×
2
C OUT (Effective)
Where,
V
1.5V
IL_PEAK = IN × t ON=
× 300ns = 204mA
L
2.2µH
VIN
1.5V
t OFF = t ON ×
300ns ×
300ns
=
=
V
-V
3V - 1.5V
OUT IN
www.maximintegrated.com
V_RIPPLE = 204mA × 4mΩ +
× 300ns ×
1
204mA
2
1
= 7mV
5µF
PCB Layout Guidelines
Maxim Integrated │ 15
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
Applications Information
Primary Cell Bluetooth Low Energy (BLE) Temperature Sensor Wearable
OPTIONAL LDO
400mV* TO 1.6V
3V
2.75V
MAX1725
MAX30205
MEDICAL GRADE
TEMP SENSOR
LDO
MAX1722X
BOOST
BATTERY
SILVER OXIDE
ZINC AIR
AAAA
AAA
AA
I2C PORT
ARM®
CORTEX®
M4
*LOAD CURRENT DEPENDENT
BLE RADIO
FLASH
LP BLE/NFC µC
WITH INTERNAL BUCK
RAM
3V
DC-DC
BUCK
ARM is a registered trademark and registered service mark and Cortex
is a registered trademark of ARM Limited.
1.3V
NFC
GND
Figure 7. MAX1722x/MAX30205 Temperature Sensor Wearable Solution
www.maximintegrated.com
Maxim Integrated │ 16
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
Primary Cell Bluetooth Low Energy (BLE) Optical Heart Rate Monitoring (OHRM) Sensor Wearable
0.8V TO 1.6V
3.3V LED SUPPLY
(OR ADJ TO 5V)
MAX30110
MAX30101
MAX30102
OHRM
MAX1722X
BOOST
BATTERY
SILVER OXIDE
ZINC AIR
AAAA
AAA
AA
I2C PORT
ARM
CORTEX
M4
BLE RADIO
FLASH
LP BLE/NFC µC
WITH INTERNAL BUCK
RAM
3.3V
3.6V MAX
DC-DC
BUCK
1.3V
NFC
GND
Figure 8. MAX1722x/MAX30110/MAX30101/MAX30102 Optical Heart Rate Monitor (OHRM) Sensor Wearable Solution for Primary Cells.
www.maximintegrated.com
Maxim Integrated │ 17
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
Secondary Rechargable Lithium Cell Bluetooth Low Energy (BLE) Optical Heart Rate Monitor
(OHRM) Sensor Wearable
OPTIONAL LDO
2.7V TO 4.2V
4.5V
5V
MAX8880
LDO
MAX1722X
BOOST
BATTERY
Li+
LED SUPPLY
MAX30110
MAX30101
MAX30102
OHRM
OR
ADJ
µC
MAX32625/26
MAX32620/21
I2C
Figure 9. MAX1722x/MAX30110/MAX30101/MAX30102 Optical Heart Rate Monitor (OHRM) Sensor Wearable Solution for
Secondary Cells.
Supercap Backup Solution for Real-Time Clock (RTC) Preservation
REGULATE WITH SUPERCAP DOWN TO 400mV!
2.3V TO 5.5V
SOURCE
VCAP = 400mV TO 5.5V
MAX14575
ADJ CURRENT
LIMIT
MAX1722X
SUPERCAP
REVERSE CURRENT- BLOCKING
3.3V
DS1341
BOOST
RTC
INTERNAL
LOAD
DISCONNECT
VCAP = 5V TO 3.8V ≥ VOUT = VCAP - VDIODE
VCAP = 3.8V TO 400mV ≥ VOUT = 3.3V
Figure 10. MAX1722x/MAX14575/DS1341 RTC Backup Solution.
www.maximintegrated.com
Maxim Integrated │ 18
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
Supercap Backup Solution to Maintain Uniform Sound for Alarm Beeper Buzzers
UNIFORM ALARM WITH SUPERCAP DOWN TO 400mV!*
VCAP = 400mV TO 5.5V
2.3V TO 5.5V
SOURCE
MAX14575
ADJ CURRENT
LIMIT
MAX1722X
SUPERCAP
5V
ALARM
BEEPER
BUZZER
BOOST
INTERNAL
LOAD
DISCONNECT
REVERSE CURRENT- BLOCKING
VCAP = 5.5V TO 400mV* ≥ VOUT = 5V
*LOAD DEPENDENT
Figure 11. MAX1722x/MAX14575 Solution for Alarm Beeper Buzzers.
Zero Reverse Current in True Shutdown for Multisource Applications
ZERO REVERSE CURRENT IN SHUTDOWN
2.7V TO 4.2V
MAX1722X
BOOST
SHUTDOWN
0UA
ILOAD
5V
SOLAR CELLS
MAX1722X
BOOST
ENABLED
0UA
CIRCUIT
(LOAD)
BATTERY
Li+
0UA
SUPERCAP
MAX1722X
BOOST
SHUTDOWN
USB
Figure 12. MAX1722x Has Zero Reverse Current in True Shutdown.
www.maximintegrated.com
Maxim Integrated │ 19
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
Typical Application Circuits
Smallest Solution Size—0603 Inductor—MAX17222/MAX17223 500mA ILIM (Part 1)
EN
COUT
10µF
OUT
MAX17222
MAX17223
GND
OUT
3.3V, 160mA
3V, 185mA
COUT
10µF
GND
SEL
STARTUP
0.88 (TYP)
GND
MAX17222
MAX17223
GND
3.3V,16mA
3V, 20mA
CIN
10µF
LX
OUT
LX
IN
EN
EN
L1 2.2µH
OUT
IN
CIN
10µF
IN
1.8V TO 3V
EN
L1 1µH
SEL
IN
0.8V TO 3V
RSEL
RSEL
L1 1µH/0603 MURATA DFE160808S-1R0M
CIN 10µF/0402/X5R/6.3V MURATA GRM155R60J106ME44
COUT 10µF/0402/X5R/10V MURATA GRM155R61A106ME44
3.3V OUTPUT RSEL 80.6K ±1%
3V OUTPUT RSEL 133K ±1%
L1 2.2µH/0603 MURATA DFM18PAN2R2MG0L
CIN 10µF/0402/X5R/6.3V MURATA GRM155R60J106ME44
COUT 10µF/0402/X5R/10V MURATA GRM155R61A106ME44
3.3V OUTPUT RSEL 80.6K ±1%
3V OUTPUT RSEL 133K ±1%
Smallest Solution Size—0603 Inductor—MAX17222/MAX17223 500mA ILIM (Part 2)
RSEL
COUT
10µF
EN
MAX17222
MAX17223
GND
OUT
5V, 160mA
3.3V*, 250mA
OUT
LX
2V, 90mA
1.8V,100mA
CIN
10µF
COUT
10µF
GND
SEL
STARTUP
0.88 (TYP)
GND
MAX17222
MAX17223
GND
L1 2.2µH
OUT
IN
OUT
LX
IN
EN
EN
IN
2.7V TO 4.2
EN
CIN
10µF
L1 2.2µH
SEL
IN
0.8V TO 1.8V
RSEL
* = IN < OUT
L1 2.2µH/0603 MURATA MFD160810-2R2M
CIN 10µF/0402/X5R/6.3V MURATA GRM155R60J106ME44
COUT 10µF/0402/X5R/10V MURATA GRM155R61A106ME44
2V OUTPUT RSEL 768K ±1%
1.8V OUTPUT RSEL OPEN (NO RESISTOR)
www.maximintegrated.com
L1 2.2µH/0603 MURATA MFD160810-2R2M
CIN 10µF/0402/X5R/6.3V MURATA GRM155R60J106ME44
COUT 10µF/0402/X5R/10V MURATA GRM155R61A106ME44
5V OUTPUT RSEL SHORT TO GND (NO RESISTOR)
3.3V OUTPUT RSEL 80.6K ±1%
Maxim Integrated │ 20
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
Typical Application Circuits (continued)
Highest Efficiency Solution—4mm x 4mm Inductor—MAX17222/MAX17223 500mA ILIM (Part 1)
CIN
10µF
EN
COUT
10µF
OUT
MAX17222
MAX17223
GND
OUT
3.3V, 185mA
3V, 200mA
COUT
10µF
GND
SEL
STARTUP
0.88 (TYP)
GND
MAX17222
MAX17223
GND
3.3V,18mA
3V, 22mA
L1 2.2µH
LX
OUT
LX
IN
EN
EN
OUT
IN
CIN
10µF
IN
1.8V TO 3V
EN
L1 1µH
SEL
IN
0.8V TO 3V
RSEL
RSEL
L1 1µH/4X4X2.1MM COILCRAFT XFL4020-102
CIN 10µF/0402/X5R/6.3V MURATA GRM155R60J106ME44
COUT 10µF/0402/X5R/10V MURATA GRM155R61A106ME44
3.3V OUTPUT RSEL 80.6K ±1%
3V OUTPUT RSEL 133K ±1%
L1 2.2µH/4X4X2.1MM COILCRAFT XFL4020-222
CIN 10µF/0402/X5R/6.3V MURATA GRM155R60J106ME44
COUT 10µF/0402/X5R/10V MURATA GRM155R61A106ME44
3.3V OUTPUT RSEL 80.6K ±1%
3V OUTPUT RSEL 133K ±1%
Highest Efficiency Solution—4 x 4mm Inductor—MAX17222/MAX17223 500mA ILIM (Part 2)
RSEL
COUT
10µF
EN
MAX17222
MAX17223
GND
OUT
5V, 185mA
3.3V*, 285mA
OUT
LX
2V, 115mA
1.8V,120mA
CIN
10µF
COUT
10µF
GND
SEL
STARTUP
0.88 (TYP)
GND
MAX17222
MAX17223
GND
L1 2.2µH
OUT
IN
OUT
LX
IN
EN
EN
IN
2.7V TO 4.2V
EN
CIN
10µF
L1 2.2µH
SEL
IN
0.8V TO 1.8V
RSEL
* = IN < OUT
L1 2.2µH/4X4X2.1MM COILCRAFT XFL4020-222
CIN 10µF/0402/X5R/6.3V MURATA GRM155R60J106ME44
COUT 10µF/0402/X5R/10V MURATA GRM155R61A106ME44
2V OUTPUT RSEL 768K ±1%
1.8V OUTPUT RSEL OPEN (NO RESISTOR)
www.maximintegrated.com
L1 2.2µH/4X4X3MM WURTH 74438357022CIN
CIN 10µF/0402/X5R/6.3V MURATA GRM155R60J106ME44
COUT 10µF/0402/X5R/10V MURATA GRM155R61A106ME44
5V OUTPUT RSEL SHORT TO GND (NO RESISTOR)
3.3V OUTPUT RSEL 80.6K ±1%
Maxim Integrated │ 21
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
Ordering Information
PART NUMBER
TEMPERATURE
RANGE
PIN-PACKAGE
INPUT PEAK
CURRENT
IPEAK
TRUE
SHUTDOWN
ENABLE TRANSIENT
PROTECTION
(ETP)
MAX17220ENT+
-40°C to +85°C
6 WLP
225mA
Yes
Yes
MAX17222ENT+
-40°C to +85°C
6 WLP
0.5A
Yes
Yes
MAX17223ENT+
-40°C to +85°C
6 WLP
0.5A
Yes
No
MAX17224ENT+
-40°C to +85°C
6 WLP
1A
Yes
Yes
MAX17225ENT+
-40°C to +85°C
6 WLP
1A
Yes
No
MAX17220ELT+
-40°C to +85°C
6 μDFN
225mA
Yes
Yes
MAX17222ELT+
-40°C to +85°C
6 μDFN
0.5A
Yes
Yes
MAX17223ELT+
-40°C to +85°C
6 μDFN
0.5A
Yes
No
MAX17224ELT+
-40°C to +85°C
6 μDFN
1A
Yes
Yes
MAX17225ELT+
-40°C to +85°C
6 μDFN
1A
Yes
No
MAX17220ALT+
-40°C to +125°C
6 μDFN
225mA
Yes
Yes
MAX17222ALT+
-40°C to +125°C
6 μDFN
500mA
Yes
Yes
MAX17223ALT+
-40°C to +125°C
6 μDFN
500mA
Yes
No
MAX17224ALT+
-40°C to +125°C
6 μDFN
1A
Yes
Yes
MAX17225ALT+
-40°C to +125°C
6 μDFN
1A
Yes
No
MAX17221ENT+
-40°C to +85°C
6 WLP
225mA
Yes
No
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
www.maximintegrated.com
Maxim Integrated │ 22
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
Revision History
REVISION
NUMBER
REVISION
DATE
PAGES
CHANGED
0
2/17
Initial release
1
4/17
Updated Electrical Characteristics and Ordering Information tables and added
Operation with VIN > VOUT section
2
5/17
Removed MAX17221 part number, general data sheet updates
3
7/17
Updated Shutdown Current into IN and Total Shutdown Current into IN LX conditions,
Note 5, TOC 5, True Shutdown Current section, Figure 10, added TOC 18, removed
future product references (MAX17220ENT+, MAX17224ENT+, MAX17220ELT+,
MAX17223ELT+, and MAX17224ELT+)
3–5, 7, 10,
18, 22
4
2/19
Updated Abolute Maximum Ratings, Electrical Characteristics, Detailed Description,
and Ordering Information
2–4, 13, 22
5
12/19
Added MAX17221 part number to data sheet
DESCRIPTION
—
3, 8, 13, 19, 21
1–23
1–23
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. │ 23
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