MAX77503

RECOMMENDED FOR NEW DESIGNS

14V Input, 1.5A High-Efficiency Buck Converter with 9μA IQ

1.5A Buck Converter with 94% Efficiency for 2-Cell/3-Cell Battery Applications

Data Sheet (Rev. 2)
Product Selection Table
Part Models
4
1ku List Price
Starting From $0.67
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Part Details

  • 1.5A Single Channel Buck Regulator
  • 3V to 14V Input Voltage Range
  • 0.8V to 99%VSUP Output Voltage Range
    • 0.8V to 5V I2C Programmable in 50mV Steps
    • 1.55V to 99%VSUP with External Feedback Resistors
    • 1.2V, 1.8V, or 3.3V Factory Preset Options
  • High-Efficiency, Low-IQ Extends Battery Life
    • 94% Peak Efficiency at 7.4VSUP, 3.3VOUT (2520 Inductor)
    • 9µA IQ (12VSUP, 1.8VOUT Internal Feedback Version)
    • Selectable Light-Load SKIP and Forced-PWM Modes
  • 1MHz or 550kHz Fixed-Frequency Switching
  • Hardware or Software Control
    • Enable Input and Power-OK Output Pins
    • Optional I2C Full Control Interface
  • Protection Features
    • Cycle-by-Cycle Inductor Peak Current Limit
    • Short-Circuit Hiccup Mode, UVLO, and Thermal Shutdown Protections
    • 1ms Default Soft-Start
  • Small Size
    • 1.85mm x 1.4mm (0.7mm max. height) WLP
    • 12-Bump, 0.4mm Pitch, 3 x 4 Array
MAX77503
14V Input, 1.5A High-Efficiency Buck Converter with 9μA IQ
MAX77503: Simplified Application Circuit
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Documentation

Data Sheet 1

User Guide 1

Design Note 1

Technical Articles 2

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Tools & Simulations

Software Development 1

EE-Sim Power® Tools 1

The EE-Sim DC-DC Converter Tool uses your requirements to quickly create a complete power design including a schematic, BOM with commercially available parts, and time and frequency domain simulations. Your customized schematic can be downloaded for further analysis in the standalone EE-Sim OASIS Simulator, featuring SIMPLIS and SIMetrix SPICE engines.

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SIMPLIS Models 1

Evaluation Kits

eval board
schematic 1
MAX77503EVKIT

Evaluation Kit for the MAX77503

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Features and Benefits

  • Proven PCB Reference Design and Layout
  • Easy to Use
    • Simple Hardware Control: Jumpers and Test Points for EN, BIASEN, and POK
    • GUI Drives I2C Interface for Optional Software Control
    • Fully Assembled and Tested
  • USB to I2C Converter Allows for Easy Communication
    • Windows-Based Software GUI Controls Registers
    • Level Translator (MAX3395) Allows for Adjusting I2C Bus Voltage from 1.8V to 3.3V
  • On-Board Electronic Load Emulates System Loading
    • Steady-State, Transient, and Random Modes

Product Details

The MAX77503 evaluation kit (EV kit) is a fully assembled and tested PCB that demonstrates the MAX77503 synchronous step-down (buck) converter. The EV kit is a step-down voltage regulator circuit using MAX77503 that is capable of 3V to 14V input, 1.5A continuous load, and output voltage adjustable between 0.8V and 5V (internal feedback options) or 1.55V and 99% of the input voltage (external feedback option).

The EV kit features a dual-range electronic load that allows easy evaluation of loading use cases for the buck converter circuit. Steady-state, transient, or random load profiles can be programmed.

A USB-to-I2C translator circuit allows a Windows®-based PC to run a graphical user interface (GUI) for easy control of the MAX77503 registers as well as the on-board electronic load.

Applications

  • 2-cell/3-cell High Power Density Supplies
  • Drones, HD Cameras, and Notebook Computers
  • Portable Li+/Li-ion Battery Powered Devices
  • Space-Constrained Portable Electronics
MAX77503EVKIT
Evaluation Kit for the MAX77503
MAX77503 EV Kit Photo

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