MAX722

3.3V/5V掌上电脑及LCD电源稳压器

电池或墙上适配器供电系统,为逻辑电路及LCD供电


点击查看特定型号的库存状况。

说明

The MAX722 and MAX723 CMOS power-supply ICs create dual regulated DC outputs for small, battery-operated microprocessor systems. Each device generates a main output (3V or 5V, selectable) and a negative auxiliary output that is adjustable for LCDs. Each device accepts two input voltages. Power can come from a main battery (two or three alkaline or NiCAD), or an unregulated DC source such as an AC-DC wall adapter.

The MAX722/MAX723 provide three improvements over prior-art devices. Physical size is reduced; the high switching frequencies (up to 0.5MHz), made possible by MOSFET power transistors, allow for tiny (< 5mm diameter) surface-mount magnetics. Efficiency is also improved to 87% (10% better than with low-voltage regulators made in bipolar technology). And supply current is reduced to 60µA by CMOS construction and a unique constant-off-time pulse-frequency modulation (PFM) control scheme.

The MAX722 and MAX723 differ only in the lower fixed output voltage of the main regulator, with a 3.3V output for the MAX722 and a 3.0V output for the MAX723.

For flash memory or PCMCIA applications that require a +12V output voltage, refer to the MAX717–721 data sheet.

关键特性

  • Low 0.9V to 5.5V Battery Input Range
  • Unregulated 7V to 20V DC Input Range
  • Dual Regulated Outputs
    • Main Output: 3.3V/5V
    • Auxiliary Output: 0V to -100V
  • 87% Efficiency at 200mA
  • Efficient PRAM Keep-Alive: 80% at 1mA
  • 8W/in³ Power Density
  • 60µA Quiescent Current
  • 20µA Shutdown Mode with VREF Alive
  • 500kHz Maximum Switching Frequency
  • ±1.5% VREF Tolerance (Over Temp.)
  • Detect Output Power Failures
  • 16-Pin Narrow SO Packages

应用

  • 条码扫描仪
  • LCD对比度调节
  • 医疗仪表
  • 掌上电脑
  • 便携式数据通信
  • 便携式数据收集设备

MAX722: 3.3V/5V掌上电脑及LCD电源稳压器
MAX723: 3.3V/5V掌上电脑及LCD电源稳压器
申请可靠性报告: MAX722 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

质量管理体系 >
环境管理体系 >

 
Status:
Package:
Temperature:

相关资料


MAX17783C
4.5V to 60V, 2.5A, High Efficiency, Step-Down DC-DC Converter

  • Reduces External Components and Total Cost
  • Reduces Number of DC-DC Regulators to Stock
  • Reduces Power Dissipation

MAX20028
Step-Down Controller with Dual 2.1MHz Step-Down DC-DC Converters

  • High-Efficiency Voltage DC-DC Controller Saves Power
  • Dual 2.1MHz DC-DC Converters with Integrated FETs Saves Space
  • High Accuracy to Meet ASIL Specification

MAX77533
14V Input, 1.5A High-Efficiency Buck Converter with 9μA IQ

  • 1.5A Single Channel Buck Regulator
  • 3V to 14V Input Voltage Range
  • 0.8V to 99%VSUP Output Voltage Range

MAX20766
Smart Slave IC with Integrated Current and Temperature Sensors

  • Increased Power Density with Fewer External Components
  • Accurate Real-Time Telemetry of Critical Parameters
  • Advanced Self-Protection Features for the System and IC

MAX20796
Dual-Phase Scalable Integrated Voltage Regulator with PMBus Interface

  • Peak Efficiency 92%; Full-Load Efficiency 90% at VIN = 12V, VOUT = 1V
  • Operating Input Voltage Range 4.5V to 16V
  • Output Voltage Range is 0.5V to 5.5V

MAX17227A
400mV to 5.5V Input, 2A nanoPower Boost Converter with Short-Circuit Protection and True Shutdown

  • 350nA Quiescent Supply Current from Output
  • Output Short-Circuit Protection
  • True Shutdown Mode

MAX20030
Dual Buck, Sync Boost and LDO–Complete Front-End Power Supply with 17μA IQ

  • Meets Stringent OEM Module Power Consumption and Performance Specifications
  • Enables Crank-Ready Designs
  • EMI Reduction Features Reduce Interference with Sensitive Radio Bands without Sacrificing Wide Input Voltage Range

MAX20031
Dual Buck, Sync Boost and LDO–Complete Front-End Power Supply with 17μA IQ

  • Meets Stringent OEM Module Power Consumption and Performance Specifications
  • Enables Crank-Ready Designs
  • EMI Reduction Features Reduce Interference with Sensitive Radio Bands without Sacrificing Wide Input Voltage Range

MAX25431
Automotive 40V, 2.2MHz, H-Bridge Buck-Boost Controller

  • Meets Stringent Automotive Quality and Reliability Requirements
  • Efficient Solution in a Small Solutions Size
  • Low Quiescent Current Helps Designers Meet Stringent OEM Current Requirements

MAX20710
Integrated, Step-Down Switching Regulator with PMBus

  • High Power Density and Low Component Count
  • Optimized Component Performance and Efficiency with Reduced Design-In Time
  • Increased Power-Supply Reliability with System and IC Self-Protection Features

MAX17760
4.5V to 76V, 300mA, High-Efficiency, Synchronous Step-Down DC-DC Converter

  • Reduces External Components and Total Cost
  • Reduces Number of DC-DC Regulators to Stock
  • Reduces Power Dissipation

MAX20430
Four-Output Mini PMIC for Safety Applications

  • Multiple Functions for Small Size
  • High-Precision for ASIL Applications
  • Diagnostics and Redundant Circuits

MAX18066
High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches

  • Feature Integration Shrinks Solution Size
  • High Efficiency Conserves Power
  • Safe, Reliable, Accurate Operation

MAX18166
High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches

  • Feature Integration Shrinks Solution Size
  • High Efficiency Conserves Power
  • Safe, Reliable, Accurate Operation

MAX77511
10V输入、四相位、可配置、3A/相位、高效Buck转换器

  • 3A/相配置Buck调节器
  • 2.3V至10V输入电压范围
  • 0.25V至5.2V输出电压范围

MAX77711
10V输入、四相位、可配置、3A/相位、高效Buck转换器

  • 3A/相配置Buck调节器
  • 2.3V至10V输入电压范围
  • 0.25V至5.2V输出电压范围

MAX15158, MAX15158A
High-Voltage Multiphase Boost Controller

  • Wide Operating Range
  • Integration Reduces Design Footprint
  • Robust Fault Protection Improves Quality and Reliability

MAX15158A
High-Voltage Multiphase Boost Controller

  • Wide Operating Range
  • Integration Reduces Design Footprint
  • Robust Fault Protection Improves Quality and Reliability