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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™

产品详情

主要特征

Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 1
VIN (V) (max) 5.5
VOUT1 (V) (min) 2
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 0.3
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
ICC (mA) (typ) 0.025
Shutdown Mode Supply Current (µA) (typ) 2
# DC-DC Outputs 1
Package/Pins UMAX/8
Budgetary
Price (See Notes)
4.54
缩小

简化框图

Technical Docs

支持和培训

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参量

Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 1
VIN (V) (max) 5.5
VOUT1 (V) (min) 2
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 0.3
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
ICC (mA) (typ) 0.025
Shutdown Mode Supply Current (µA) (typ) 2
# DC-DC Outputs 1
Package/Pins UMAX/8
Budgetary
Price (See Notes)
4.54

主要特征

  • > 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/用途

  • 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

描述

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.

简化框图

MAX1795、MAX1796、MAX1797:典型工作电路 MAX1795、MAX1796、MAX1797:典型工作电路 Zoom icon

Technical Docs

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