MAX1692

低噪声、5.5V输入、PWM降压型稳压器

微小的开关控制器,提供600mA驱动,性能指标比LDO提高10倍


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说明

The MAX1692 is a low-noise, pulse-width-modulated (PWM), DC-DC step-down converter. It powers logic and transmitters in small wireless systems such as cellular phones, communicating PDAs, and handy-terminals. The device features an internal synchronous rectifier for high efficiency; it requires no external Schottky diode. Excellent noise characteristics and fixed-frequency operation provide easy post-filtering. The MAX1692 is ideally suited for Li-Ion battery applications. It is also useful for +3V or +5V fixed input applications.

The device operates in one of four modes. Forced PWM mode operates at a fixed frequency regardless of the load. Synchronizable PWM mode allows an external switching frequency to control and minimize harmonics. Idle Mode™ (PWM/PFM) extends battery life by switching to a PFM pulse-skipping mode during light loads. Shutdown mode places the device in standby, reducing quiescent supply current to under 0.1µA.

The MAX1692 can deliver over 600mA. The output voltage can be adjusted from 1.25V to VIN with the input range of +2.7V to +5.5V. Other features of the MAX1692 include high efficiency, low dropout voltage, and a 1.2%-accurate 1.25V reference. It is available in a space-saving 10-pin µMAX package with a height of only 1.11mm.
MAX1692:典型工作电路 MAX1692:典型工作电路 放大+

关键特性

  • +2.7V to +5.5V Input Range
  • Adjustable Output from 1.25V to VIN
  • 600mA Guaranteed Output Current
  • 95% Efficiency
  • No Schottky Diode Required
  • 85µA Quiescent Current
  • 100% Duty Cycle in Dropout
  • 750kHz Fixed-Frequency PWM Operation
  • Synchronizable Switching Frequency
  • Accurate Reference: 1.25V (±1.2%)
  • Small 10-Pin µMAX Package

应用

  • 电池供电设备(1节Li+或3节NiMH/NiCd)
  • 蜂窝电话
  • 无绳电话
  • CPU I/O电源
  • 笔记本电脑芯片组电源
  • PDA与手持终端
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeSynchronous SwitchingDC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX1692 2.75.51.255.5
Preset
Resistor
0.6InternalYes1750
UMAX/10
$2.92 @1k
查看所有Step-Down Switching Regulators (389)
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。


MAX1692EVKIT: MAX1692评估板
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

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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