Converters | NCP1597

同步降压转换器，1 MHz，2.0 A

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NCP1597A 系列为 1 MHz 固定频率、高输出电流、同步 PWM 转换器，集成了低电阻、高压侧 P 沟道 MOSFET 以及低压侧 N 沟道 MOSFET。NCP1597A 使用电流模式控制提供而快速瞬变响应和卓越环路稳定性，在轻型负载下支持 PFM 模式，提高了能效。它将 4.0 V 至 5.5 V 的输入电压调节为低至 0.8 V 的输出电压，能够提供高达 2.0 A 的电流。NCP1597A 具有固定内部开关频率 (FSW)、限制涌入电流的内部软启动等特性。 使用 EN 引脚，关断电源电流降至最大 1 µA。其他特性包括按周期电流限制；短路保护、节电模式和高温关断。 NCP1597A 可与 1.5A NCP1595A 实现引脚对引脚兼容。 NCP1597B 在 10 引脚 3x3mm DFN 封装内提供相同性能。

  • USB Powered Devices
  • Hard Disk Drive (HDD)
  • DSP Power
  • Set-Top-Box
  • Input voltage range from 4.0 V to 5.5 V
  • Internal 140m / 90m MOSFETs
  • Fixed 1 MHz Switching Frequency
  • Hiccup Mode Short-Circuit Protection
  • Thermal Shutdown Protection
  • Adjustable Output Voltage Down to 0.8 V
  • PFM Mode at Light Load

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NCP1597AMNTWG

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CAD Model

Pb

A

H

P

DFN-6

506AH

1

260

REEL

3000

N

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4

5.5

0.8 to 4.95

2

90

1000

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