MAX77837
Info : RECOMMENDED FOR NEW DESIGNS
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MAX77837

5.5V Input, 0.4A/1.05A Switching Current Buck-Boost Converter with 400nA IQ

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 2
1ku List Price Starting From $0.64
Features
  • 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
Additional Details
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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).

APPLICATIONS

  • LPWAN SoC Companion Power Solution
  • IoT and Wearable Applications
  • Asset Trackers
  • Smart Meters
Part Models 2
1ku List Price Starting From $0.64

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX77837EWA+
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MAX77837EWA+T
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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MAX77837EVKIT

Evaluation Kit for MAX77837 in WLP Package

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MAX77837EVKIT

Evaluation Kit for MAX77837 in WLP Package

Evaluation Kit for MAX77837 in WLP Package

Features and 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

Product Detail

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.

Resources

Tools & Simulations

Tools & Simulations 1

Reference Designs

Reference Designs 1

EVAL CN0583 CRR1 ANGLE web

Multistandard Micropower Verified Smoke Detection System-on-Module

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CN0583

Multistandard Micropower Verified Smoke Detection System-on-Module

CN0583

Circuits from the lab

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Multistandard Micropower Verified Smoke Detection System-on-Module

Features and Benefits

  • Complete Smoke Detector System on Module
  • Micropower Operation for >10 Year Battery Lifetime
  • UL 217 & UL 268 Verified Smoke Detector Algorithm
  • EN 54-7 & EN 14604 Verified Smoke Detector Algorithm
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Design & Integration Tools

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