MAX1673

稳压型、125mA输出、电荷泵DC-DC反相器

灵活的控制结构—固定频率或低静态电流模式


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说明

The MAX1673 charge-pump inverter provides a low-cost, compact means of generating a regulated negative output from a positive input at up to 125mA. It requires only three small capacitors, and only two resistors to set its output voltage. The input range is 2V to 5.5V. The regulated output can be set from 0V to -VIN in Skip regulation mode or -1.5V to -VIN in Linear (LIN) regulation mode.

In Skip mode, the MAX1673 regulates by varying its switching frequency as a function of load current. This On-Demand™ switching gives the MAX1673 two advantages: very small capacitors and very low quiescent supply current. At heavy loads, it transfers energy from the input to the output by switching at up to 350kHz. It switches more slowly at light loads, using only 35µA quiescent supply current.

In Linear mode, the MAX1673 switches at a constant 350kHz at all loads and regulates by controlling the current-path resistance. This provides constant-frequency ripple, which is easily filtered for low-noise applications.

This device also features a 1µA logic-controlled shutdown mode and is available in a standard 8-pin SO package. For a device that delivers about 10mA and fits in a smaller package, refer to the MAX868.
MAX1673:典型工作电路 MAX1673:典型工作电路 放大+

关键特性

  • Regulated Negative Output Voltage (up to -1 x VIN)
  • 125mA Output Current
  • 35µA Quiescent Supply Current (Skip-mode regulation)
  • 350kHz Fixed-Frequency, Low-Noise Output (Linear-mode regulation)
  • 2V to 5.5V Input Range
  • 1µA Logic-Controlled Shutdown

应用

  • 模拟信号处理
  • 便携式摄像机
  • 数码相机
  • 硬盘驱动器
  • 测量仪表
  • 调制解调器

请查看具体的参数规格 Charge Pumps (45)


Part NumberTopologyVIN
(V)
VIN
(V)
ICC
(mA)
Unadj. VOUT
(V)
Adj. VOUT
(V)
Adj. VOUT
(V)
IOUT
(A)
Oper. Freq.
(kHz)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
minmaxmaxminmaxtypSee Notes
MAX1673 
Inverter
Regulated
25.516-VIN-VIN00.125350-40 to +85
SOIC (N)/8
$2.13 @1k

Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。
产品可靠性报告: MAX1673.pdf 
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。

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