MAX1637 - 微型、低电压、高精度降压型控制器

MAX1637是Maxim美信半导体公司的一款DC-DC开关调节器产品，MAX1637是微型、低电压、高精度降压型控制器，本站介绍了MAX1637的封装应用图解、特点和优点、功能等，并给出了与MAX1637相关的Maxim元器件型号供参考。

MAX1637 - 微型、低电压、高精度降压型控制器 - DC-DC开关调节器 - 低电压、高精度降压控制器，用于便携式CPU供电 - 美信半导体

产品概述

The MAX1637 synchronous, buck, switch-mode power-supply controller generates the CPU supply voltage in battery-powered systems. The MAX1637 is a stripped-down version of the MAX1636 in a smaller 16-pin QSOP package. The MAX1637 is intended to be powered separately from the battery by an external bias supply (typically the +5V system supply) in applications where the batteryexceeds 5.5V. The MAX1637 achieves excellent DC and AC output voltage accuracy. This device can operate from a low input voltage (3.15V) and delivers the excellent load-transient response needed by upcoming generations of dynamic-clock CPUs.

Using synchronous rectification, the MAX1637 achieves up to 95% efficiency. Efficiency is greater than 80% over a 1000:1 load-current range, which extends battery life in system-suspend or standby mode. Excellent dynamic response corrects output load transients caused by the latest dynamic-clock CPUs within five 300kHz clock cycles. Powerful 1A on-board gate drivers ensure fast external N-channel MOSFET switching.

The MAX1637 features a logic-controlled and synchronizable, fixed-frequency, pulse-width-modulation (PWM) operating mode. This reduces noise and RF interference in sensitive mobile-communications and pen-entry applications. Asserting the SKIP-bar pin enables fixed-frequency mode, for lowest noise under all load conditions. For a stand-alone device that includes a +5V VL linear regulator and low-dropout capabilities, refer to the MAX1636 data sheet.

关键特性

以下关键特性由Maxim美信半导体提供：

±2% DC Accuracy

0.1% (typ) DC Load Regulation

Adjustable Switching Frequency to 350kHz

Idle Mode™ Pulse-Skipping Operation

1.10V to 5.5V Adjustable Output Voltage

3.15V Minimum IC Supply Voltage (at VCC pin)

Internal Digital Soft-Start

1.1V ±2% Reference Output

1µA Total Shutdown Current

Output Overvoltage Crowbar Protection

Output Undervoltage Shutdown (foldback)

Tiny 16-Pin QSOP Package

热门应用

手持终端、PDA

笔记本电脑

亚笔记本电脑

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