Features and Benefits
- 1.8V to 5.5V Input Voltage
- Output Voltages Combination from 1.8V to 5.2V
- Peak Efficiency of 95% (5.5VIN, 3.8VOUT)
- 430nA Typical Quiescent current
- 10nA Shutdown Current
- RSEL Configurations
- OUT1 and OUT2
- 1.05A or 0.4A Switch Current Limit
- DVS Function On or Off
- Hiccup or Latch-Off Mode
- Protections Features
- Input Undervoltage Lockout (UVLO)
- Overcurrent protection (OCP)
- Thermal Shutdown
- 1.84mm x 1.03mm, 8-Bump WLP
- 2.5mm x 2.0mm, 8-Lead FC2QFN
The MAX77837 is the industry's smallest nanoPower buck-boost converter optimized for single-cell battery chemistries that are used in wearable and Internet of Things (IoT) applications.
The converter operates on an input supply between 1.8V to 5.5V. Output voltages between 1.8V to 5.2V are set through resistors connected to two hardware control pins. The IC can operate in Continuous Conduction Mode (CCM), Skip Mode, and a Low-Power Mode to ensure high efficiency over a wide load current range. In addition, the IC features an ultra-low quiescent current of 430nA (typical) and a shutdown current of 10nA (typical), making it ideal for battery-powered applications requiring a long standby time.
The MAX77837 offers two unique hardware control pins, SEL1 and SEL2. The resistor connected at SEL1 (RSEL1) selects a predefined combination of two output voltages between 1.8V to 5.2V, OUT1 and OUT2. The resistor connected at SEL2 (RSEL2) allows two different configurations of switch current limit at 1050mA and 400mA to optimize external component size, enable or disable Dynamic Voltage Scaling (DVS) function, and select either hiccup or latch-off mode during a hard short event. RSEL2 can also configure the startup voltage as OUT1 or OUT2, and the DVS function can change the output voltage from a lower VOUT to a higher VOUT as required without powering down the part.
The MAX77837 is available in both a 1.84mm x 1.03mm, 8-bump wafer-level package (WLP) with a bump pitch of 0.4mm and a 2.5mm x 2.0mm, 8-lead Flip Chip QFN package (FC2QFN).
- LPWAN SoC Companion Power Solution
- IoT and Wearable Applications
- Asset Trackers
- Smart Meters
Markets and Technologies
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
The MAX77837 evaluation kit (EV kit) is a fully assembled and tested printed circuit board (PCB) that demonstrating the MAX77837 nano power buck-boost converter. The EV kit has an input range of 1.8V to 5.5V, with a switch current limit of 1.05A.
The MAX77837 IC has two hardware control pins, SEL1 and SEL2. The resistor connected at SEL1 (RSEL1) selects a predefined combination of two output voltages between 1.8V and 5.2V, OUT1 and OUT2. The resistor connected at SEL2 (RSEL2) allows different configurations of switch current limit to optimize external components size, enable or disable DVS function, select either hiccup or latch-off mode, and IC startup voltage.
The EV kit is compatible with MAX77837 WLP IC (MAX77837EWA+T) and equipped with test points and jumpers to test most of the device's functionality. In addition, there are probing sockets on critical nodes (OUT-1, LX1, and LX2) for precise measurements.
Features & Benefits
- 1.8V to 5.5V Input Voltage
- Accessible Test points for INS and OUTS
- Output Voltage (OUT1 and OUT2) adjustable using RSEL1
- Switch current limit, DVS function, and Hiccup or Latchoff mode operation
- Sense sockets for high-accuracy measurements
Documentation & Resources
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.
Support & Discussions
Sample & Buy
See our Ordering FAQs for answers to questions about online orders, payment options and more.
Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Please see the latest communication from our CCO regarding lead times.
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.