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24V Input, 500mA Buck Regulator with Dual-Input Power MUX

Wide VIN Range, Low IQ Buck Integrates Ideal Diode ORing and Optional I2C Programmability

产品详情

The MAX77756 is a synchronous 500mA step-down DC-DC converter with integrated dual-input power multiplexer (MUX). The converter operates on an input supply as low as 3.0V and as high as 24V. Default output voltage is factory-programmed to either 1.8V, 3.3V, or 5.0V. Output voltage is further adjustable through external resistors or an I2C serial interface.

The dual-input power MUX selects the higher voltage from two different input sources to power the step-down converter. Control circuitry ensures that only one channel of the MUX is on at a time to prevent cross-conduction between input sources. For single-input applications, the MUX can be bypassed and the step-down converter can be powered directly from the SUP pin.

The MAX77756 is available in a small 2.33mm × 1.42mm (0.7mm max height), 15-bump wafer-level package (WLP). For a similar buck converter without a power MUX, refer to the MAX77596.

Design Solution: Pack More Power in Your Cool, Small Smart-Home Hub ›

主要特征

  • Wide Input Power Supply
    • 3V to 24V Supply Voltage
    • 500mA (max) Output Current
    • 1.8V, 3.3V, or 5.0V Factory-Set VOUT with Optional I2C Control: 1.5V to 7.5V in 50mV Steps
    • External Feedback Resistor VOUT Option (1V to 99% VSUP)
    • Hardware or Software Enable
  • Dual-Input Power MUX Replaces Common-Cathode Diode Arrays
    • Automatic Ideal-Diode ORing Voltage Selector
    • 250mΩ MOSFETs Minimize Power Consumption, BOM, and Solution Size
  • Low IQ Enables Always-On Rails
    • 1.5µA Quiescent Current (Only SUP Powered)
    • 19µA Quiescent Current (IN1/IN2 Powered)
    • 88% Peak Efficiency (12VSUP, 3.3VOUT)
  • Safe and Easy to Use
    • Short-Circuit and Thermal Protection
    • 8ms Soft-Start
    • Software-Enabled Spread Spectrum
    • Pin-Programmable Inductor Peak Current Level
  • Small Size
    • 2.33mm × 1.42mm (0.7mm max height) Wafer-Level Package (WLP)
    • 15-Bump, 0.4mm Pitch, 3 × 5 Array

应用/用途

  • null
  • null
  • 笔记本电脑和平板电脑
  • null
Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 3
VIN (V) (max) 24
VOUT1 (V) (min) 1.5
VOUT1 (V) (max) 7.5
IOUT1 (A) (max) 0.5
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Digital/VID
Preset
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 1000
Design Tools EE-Sim
Package/Pins WLP/15
Budgetary
Price (See Notes)
$0.49 @1k
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简化框图

MAX77756: Simplified Block Diagram MAX77756: Simplified Block Diagram Zoom icon

技术文档

设计与质量

单击下面的标题以查看详情页面

描述

The MAX77756 evaluation kit (EV kit) is a fully assembled and tested PCB that demonstrates the MAX77756 synchronous 500mA step-down converter. The EV kit allows for easy evaluation of the IC’s input power multiplexer and step-down converter. A dual-range (8mA and 800mA full scale) electronic load is included on the EV kit for easy buck converter load control.

Windows®-based software provides a user-friendly graphical user interface (GUI), as well as a detailed register-based interface to exercise the features of the IC.

查看详情

特征

  • Easy to Use
    • Evaluates Both Fixed-Output and Adjustable- Output Versions (3.3V Version Preinstalled)
    • 3V to 24V Input Voltage Range
    • Demonstrates 1.5µA Quiescent Current at 12VSUP Input
  • GUI Drives I2C Interface
  • Emulates System Loading
    • On-Board Electronic Load
    • Electronic Load has Steady-State, Transient, and Random Modes
    • Optional Ability to Control Electronic Load through Function Generator for Patterned Load Waveforms
  • Proven PCB Layout
  • Fully Assembled and Tested

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工具和模型

EE-Sim: 设计和仿真MAX77756

创建设计

支持和培训

在Maxim的知识库中搜索您所需的答案。

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参量

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 3
VIN (V) (max) 24
VOUT1 (V) (min) 1.5
VOUT1 (V) (max) 7.5
IOUT1 (A) (max) 0.5
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Digital/VID
Preset
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 1000
Design Tools EE-Sim
Package/Pins WLP/15
Budgetary
Price (See Notes)
$0.49 @1k

主要特征

  • Wide Input Power Supply
    • 3V to 24V Supply Voltage
    • 500mA (max) Output Current
    • 1.8V, 3.3V, or 5.0V Factory-Set VOUT with Optional I2C Control: 1.5V to 7.5V in 50mV Steps
    • External Feedback Resistor VOUT Option (1V to 99% VSUP)
    • Hardware or Software Enable
  • Dual-Input Power MUX Replaces Common-Cathode Diode Arrays
    • Automatic Ideal-Diode ORing Voltage Selector
    • 250mΩ MOSFETs Minimize Power Consumption, BOM, and Solution Size
  • Low IQ Enables Always-On Rails
    • 1.5µA Quiescent Current (Only SUP Powered)
    • 19µA Quiescent Current (IN1/IN2 Powered)
    • 88% Peak Efficiency (12VSUP, 3.3VOUT)
  • Safe and Easy to Use
    • Short-Circuit and Thermal Protection
    • 8ms Soft-Start
    • Software-Enabled Spread Spectrum
    • Pin-Programmable Inductor Peak Current Level
  • Small Size
    • 2.33mm × 1.42mm (0.7mm max height) Wafer-Level Package (WLP)
    • 15-Bump, 0.4mm Pitch, 3 × 5 Array

应用/用途

  • null
  • null
  • 笔记本电脑和平板电脑
  • null

描述

The MAX77756 is a synchronous 500mA step-down DC-DC converter with integrated dual-input power multiplexer (MUX). The converter operates on an input supply as low as 3.0V and as high as 24V. Default output voltage is factory-programmed to either 1.8V, 3.3V, or 5.0V. Output voltage is further adjustable through external resistors or an I2C serial interface.

The dual-input power MUX selects the higher voltage from two different input sources to power the step-down converter. Control circuitry ensures that only one channel of the MUX is on at a time to prevent cross-conduction between input sources. For single-input applications, the MUX can be bypassed and the step-down converter can be powered directly from the SUP pin.

The MAX77756 is available in a small 2.33mm × 1.42mm (0.7mm max height), 15-bump wafer-level package (WLP). For a similar buck converter without a power MUX, refer to the MAX77596.

Design Solution: Pack More Power in Your Cool, Small Smart-Home Hub ›

简化框图

MAX77756: Simplified Block Diagram MAX77756: Simplified Block Diagram Zoom icon

技术文档

支持和培训

在Maxim的知识库中搜索您所需的答案。

过滤搜索

Maxim专业的应用工程师团队也可以为您解答技术问题,请 访问Maxim的 支持中心