MAX1796

低电源电流、升压型DC-DC转换器,可真正关断

低电源电流、升压型DC-DC转换器,具有True Shutdown™


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说明

The MAX1795/MAX1796/MAX1797 are high-efficiency, step-up DC-DC converters intended for small portable hand-held devices. These devices feature Maxim's True Shutdown™ circuitry, which fully disconnects the output from the input in shutdown, improves efficiency, and eliminates costly external components. All three devices also feature Maxim's proprietary LX-damping circuitry for reduced EMI in noise-sensitive applications. For additional in-system flexibility, a battery monitoring comparator (LBI/LBO) remains active even when the DC-DC converter is in shutdown.

The input voltage range is +0.7V to VOUT, where VOUT can be set from +2V to +5.5V. Startup is guaranteed from +0.85V. The MAX1795/MAX1796/MAX1797 have a preset, pin-selectable 5V or 3.3V output. The output can also be adjusted to other voltages, using two external resistors. The three devices differ only in their current limits, allowing optimization of external components for different loads: the MAX1795, MAX1796, and MAX1797 have current limits of 0.25A, 0.5A, and 1A, respectively. All devices are packaged in a compact, 8-pin µMAX® package that is only 1.09mm tall and half the size of an 8-pin SO.
MAX1795、MAX1796、MAX1797:典型工作电路 MAX1795、MAX1796、MAX1797:典型工作电路 放大+

关键特性

  • > 95% Efficiency
  • True-Shutdown Circuitry
    • Output Disconnects from Input in Shutdown
    • No External Schottky Diode Needed
  • 25µA Quiescent Supply Current
  • Low-Noise Antiringing Feature
  • LBI/LBO Comparator Enabled in Shutdown
  • 2µA Shutdown Current
  • 8-Pin µMAX Package

应用

  • PDA与掌上电脑
  • 便携式数字音频播放器
  • 便携式终端
  • 无线手机
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
IOUT1
(A)
Output Adjust. MethodSwitch TypeSynchronous SwitchingICC
(mA)
Shutdown Mode Supply Current
(µA)
DC-DC OutputsPackage/PinsBudgetary
Price
minmaxminmaxtyptypSee Notes
MAX1795 0.75.525.5
3.3
5
0.18
Preset
Resistor
InternalYes0.02521
UMAX/8
$4.02 @1k
MAX1796 10.3
UMAX/8
$4.28 @1k
MAX1797 10.55
UMAX/8
$2.29 @1k
查看所有Step-Up Switching Regulators (96)
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。


MAX1797EVKIT: MAX1795、MAX1796、MAX1797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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