MAX1637：微型、低电压、高精度降压型控制器
低电压、高精度降压控制器，用于便携式CPU供电
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 battery exceeds 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
| MAX1637：典型工作电路 应用
|
数据手册DataSheet
| 语言 | 下载文件 | 备注 |
|---|---|---|
| 英文 | MAX1637.pdf | Rev 2; 09/2005 |
关键参数
| Part Number | VIN (V) | VIN (V) | VOUT1 (V) | VOUT1 (V) | Preset VOUT (V) | Output Adjust. Method | IOUT1 (A) | Switch Type | Synchronous Switching | DC-DC Outputs | Oper. Freq. (kHz) | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | min | max | max | See Notes | ||||||||
| MAX1637 | 6 | 26 | 1.1 | 5.5 |
| Resistor | 0.1 | External | Yes | 1 | 350 | QSOP/16 | $4.57 @1k |
开发工具
技术资料
- Auto-Retry Controller Suits Telecom Applications
- HFAN-08.2.1: PWM Temperature Controller for Thermoelectric Modules Keeps Components within 0.1°C
- A 3.3V Input Step-Down Converter for CPU Cores
- DDR Memory-Termination Supply is Flexible for 2.5V and 1.8V Memory Systems
相关产品
- MAX1636：低电压、高精度降压型控制器，用于便携式CPU电源
订购型号
| 型号 | 状况 | 推荐替代产品 | 封装 | 温度 | RoHS/无铅 |
|---|---|---|---|---|---|
| MAX1637EEE | 停止供货 | MAX1637EEE+ | QSOP,；16引脚；30.9mm² | -40°C至+85°C | RoHS/无铅：否 |
| MAX1637EEE+ | 生产中 | QSOP,；16引脚；30.9mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX1637EEE+T | 生产中 | QSOP,；16引脚；30.9mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX1637EEE-T | 停止供货 | MAX1637EEE+T | QSOP,；16引脚；30.9mm² | -40°C至+85°C | RoHS/无铅：否 |
- MAX1637.pdf MAX1637
- Auto-Retry Controller Suits Telecom Applications MAX6342
- HFAN-08.2.1: PWM Temperature Controller for Thermoelectric Modules Keeps Components within 0.1°C MAX4250
- A 3.3V Input Step-Down Converter for CPU Cores MAX1637
- DDR Memory-Termination Supply is Flexible for 2.5V and 1.8V Memory Systems MAX4130
- 典型工作电路 MAX1637
