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MAX38640/1/2/3/A/B
Tiny 1.8V - 5.5V Input, 330nA I , 700mA
Q
nanoPower Buck Converter
General Description
Benefits and Features
The MAX3864xA/B are nanoPower family of ultra-low
330nA quiescent current buck (step-down) DC-DC con-
verters operating from 1.8V to 5.5V input voltage and sup-
porting load currents of up to 175mA, 350mA, 700mA with
peak efficiencies of 96%. While in shutdown, there is only
5nA of shutdown current. The devices offer ultra-low qui-
escent current, small total solution size, and high efficien-
cy throughout the load range. The MAX3864xA/B are ide-
al for battery applications where long battery life is a must.
● Extends Battery Life
• 330nA Ultra-Low Quiescent Supply Current
• 5nA Shutdown Current
• 96% Peak Efficiency and Over 88% at 10µA
● Easy to Use – Addresses Popular Operation
• 1.8V to 5.5V Input Range
• Preprogrammed V
• Single Resistor Adjustable V
• ±1.75% Output Voltage Accuracy
from 0.5V to 5V
OUT
from 0.7V to 3.3V
OUT
The MAX3864xA/B family utilizes a unique control scheme
that allows ultra-low quiescent current and high efficiency
over a wide output current range. MAX38642 excludes ac-
tive discharge resistor in shutdown which allows the out-
put to be regulated or held high by another source or by
the charged output capacitor.
• Up to 175mA/350mA/700mA Load Current
● Protects System in Multiple Use Cases
• Reverse-Current Blocking in Shutdown
• Optional Active Discharge Feature
● Reduces Size and Increases Reliability
• -40°C to +85°C Temperature Range
The MAX3864xA/B devices are offered in a space-saving
1.42mm x 0.89mm 6-pin wafer-level package (WLP) (2
x 3 bumps, 0.4mm pitch), as well as a 2mm x 2mm,
6-pin µDFN package. All parts are specified from -40°C to
+85°C.
• 2mm x 2mm 6-pin µDFN Package
• 1.42mm x 0.89mm, 0.4mm Pitch 6-pin (2 x 3) WLP
Ordering Information appears at end of data sheet.
Applications
● Portable Space-Constrained Consumer Products
● Wearable devices, Ultra-Low-Power IoT, NB IoT, and
BLE
● Single Li-ion and Coin Cell Battery Products
● Wired, Wireless, Industrial Products
Typical Operating Circuit
2.2µH
INPUT 1.8V-5.5V
OUTPUT 1.8V
IN LX
OUT
CIN
COUT
10µF
22µ F
MAX38640A
RSEL
RSEL
EN
GND
768kΩ
19-100410; Rev 0; 10/18