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3V至5V稳压型电荷泵,用于SIM卡

1MHz电荷泵,可理想用于蜂窝电话

产品详情

主要特征

Parametric specs for Charge Pumps
Topology Doubler
Regulated
VIN (V) (min) 2.7
VIN (V) (max) 4.2
IOUT (A) (typ) 0.012
Unadj. VOUT (V) 5
ICC (mA) (max) 0.1
Switching Frequency (kHz) 1000
Oper. Temp. (°C) -40 to +85
Package/Pins See Data Sheet
缩小

简化框图

Technical Docs

数据资料 3V至5V稳压型电荷泵,用于SIM卡 Dec 01, 1998

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参量

Parametric specs for Charge Pumps
Topology Doubler
Regulated
VIN (V) (min) 2.7
VIN (V) (max) 4.2
IOUT (A) (typ) 0.012
Unadj. VOUT (V) 5
ICC (mA) (max) 0.1
Switching Frequency (kHz) 1000
Oper. Temp. (°C) -40 to +85
Package/Pins See Data Sheet

主要特征

  • 2.7V to 4.2V Input Range
  • 12mA min Charge-Pump Output Current
  • 45µA Quiescent Supply Current
  • 0.1µA Supply Current in Shutdown Mode
  • 5.0V Regulated Charge-Pump Output (MAX1686H)
  • 4.75V Regulated Charge-Pump Output (MAX1686)
  • Input-Output Shorting Switch for 3V Cards
  • Small External Components (Uses a 0.047µF, 0.1µF, and a 2.2µF Capacitor)
  • Output Driven to Ground in Shutdown Mode
  • Super-Small 8-Pin µMAX Package
  • Soft-Start and Short-Circuit Protection
  • Regulated charge pump for SIM cards nominal output voltage of 5.0V (MAX1686H)

应用/用途

  • GSM蜂窝电话
  • PCS电话
  • 个人通信装置
  • 便携式POS终端

描述

The MAX1686 provides power for dual-voltage subscriber ID module (SIM) cards in portable applications such as GSM cellular phones. Designed to reside in the portable unit (cellular phone handset), the 1MHz charge pump converts a 2.7V to 4.2V input to regulated 5V output. The MAX1686H has a nominal output voltage of 5.0V, while the MAX1686 is set to 4.75V to reduce SIM card current drain. The charge pump has only 45µA quiescent supply current, which reduces to 3µA when a 3V-capable SIM card is being powered and the charge pump is disabled. An internal input/output shorting switch provides power for 3V SIM cards.

The MAX1686/MAX1686H require only three external capacitors around their space-saving, thin (1mm) 8-pin µMAX® packages.

简化框图

MAX1686、MAX1686H:典型工作电路 MAX1686、MAX1686H:典型工作电路 Zoom icon

Technical Docs

数据资料 3V至5V稳压型电荷泵,用于SIM卡 Dec 01, 1998

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心