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  • 產品 價格:6.00
  • 品   牌:MAXIM型號:MAX723CSE
  • 最小起訂量:1000
  • 供貨總 量:30000
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產品詳細信息

羽毛球的日语术语: 3.3V/5V掌上電腦及LCD電源穩壓器

電池或墻上適配器供電系統,為邏輯電路及LCD供電

概述

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.

關鍵特性

  • 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

    應用/使用

    • 條碼掃描儀
    • LCD對比度調節
    • 醫療儀表
    • 掌上電腦
    • 便攜式數據通信
    • 便攜式數據收集設備

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深圳市藍信偉業電子有限公司

會員資質:7

會員積分:953

經營品牌:JRC Maxim

聯系方式

聯 系人:陳小姐

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聯系電話:0755-83291586

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