MAX38656
RECOMMENDED FOR NEW DESIGNSTiny 1.8V to 5.5V Input, 420nA IQ, 1.5A nanoPower Buck Converter with 100% Duty-Cycle Operation
- Part Models
- 2
- 1ku List Price
- Starting From $1.18
Overview
- Extends Battery Life
- 420nA Ultra-Low Quiescent Supply Current
- 5nA Shutdown Current
- 95% Peak Efficiency and over 85% at 10μA
- Easy to Use—Addresses Popular Operation
- 1.8V to 5.5V Input Range
- Single Resistor-Adjustable VOUT from 0.7V to 3.3V (MAX38656A)
- Preprogrammed VOUT from 0.7V to 5V (MAX38656B) in Steps of 50mV
- 100% Duty-Cycle Mode for Low-Dropout Operation
- ±1.5% Output Voltage Accuracy
- Up to 1.5A Load Current
- Reverse-Current Blocking in Shutdown
- Active Discharge Feature
- 40°C to +125°C Operating Temperature Range
- 1.58mm x 0.89mm, 0.4mm Pitch, 6-Pin (2 x 3) WLP
- 2mm x 2mm 8-pin TDFN Package
The MAX38656 is an ultra-low IQ (420nA) buck converter that steps down from an input voltage range of 1.8V to 5.5V to a wide range of output voltages between 0.7V to 3.3V using a single resistor at the RSEL pin for the MAX38656A or factory-preprogrammed fixed output voltage versions from 0.7V to 5V for the MAX38656B. For the MAX38656B, the RSEL pin can be left floating.
The MAX38656 buck converter offers robust performance features. To optimize efficiency and transient response across the load range, the buck converter automatically switches between ultra-low-power mode (ULPM), low-power mode (LPM) and high-power mode (HPM) to service the load better, depending on the load current. The buck converter overregulates in ULPM to allow the output capacitor to handle the transient load currents. See Figure 1 for the MAX38656 mode transitions. The device supports 100% duty-cycle operation. In applications where the ambient temperature is more than +85°C, make sure that the load current is always more than 10μA at the output of buck converter. The active discharge resistor in the MAX38656A/MAX38656B pulls OUT to ground when the part is in shutdown.
Key Applications- Portable Space-Constrained Consumer Products
- Wearable Devices, Ultra-Low-Power Internet of Things (IoT), Narrowband IoT, and Bluetooth Low Energy
- Single Li-Ion and Coin Cell Battery Products
- Wired, Wireless Industrial Products
Documentation
Data Sheet 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX38656AANT+ | WLCSP | ||
| MAX38656AANT+T | WLCSP |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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ADI Power Studio™ Designer
ADI Power Studio™ Designer is the next-generation tool for IC-level, power supply design, guiding engineers to faster, validated solutions.
Learn MoreSIMPLIS Models 1
Evaluation Kits
Evaluation Kit for MAX38656A
Resources
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