Datasheet > 10MV5600AX

10MV5600AX

更新时间： 2024-11-25 22:07:55

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器电容器控制器
页数	文件大小	规格书
22页	597K
描述
N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages

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10MV5600AX 数据手册

June 2003

LM2727/LM2737

N-Channel FET Synchronous Buck Regulator Controller

for Low Output Voltages

General Description

Features

n Input power from 2.2V to 16V

The LM2727 and LM2737 are high-speed, synchronous,

switching regulator controllers. They are intended to control

currents of 0.7A to 20A with up to 95% conversion efficien-

cies. The LM2727 employs output over-voltage and under-

voltage latch-off. For applications where latch-off is not de-

sired, the LM2737 can be used. Power up and down

sequencing is achieved with the power-good flag, adjustable

soft-start and output enable features. The LM2737 and

LM2737 operate from a low-current 5V bias and can convert

from a 2.2V to 16V power rail. Both parts utilize a fixed-

frequency, voltage-mode, PWM control architecture and the

switching frequency is adjustable from 50kHz to 2MHz by

adjusting the value of an external resistor. Current limit is

achieved by monitoring the voltage drop across the on-

resistance of the low-side MOSFET, which enhances low

duty-cycle operation. The wide range of operating frequen-

cies gives the power supply designer the flexibility to fine-

tune component size, cost, noise and efficiency. The adap-

tive, non-overlapping MOSFET gate-drivers and high-side

bootstrap structure helps to further maximize efficiency. The

high-side power FET drain voltage can be from 2.2V to 16V

and the output voltage is adjustable down to 0.6V.

n Output voltage adjustable down to 0.6V

n Power Good flag, adjustable soft-start and output enable

for easy power sequencing

n Output over-voltage and under-voltage latch-off

(LM2727)

n Output over-voltage and under-voltage flag (LM2737)

n Reference Accuracy: 1.5% (0˚C - 125˚C)

n Current limit without sense resistor

n Soft start

n Switching frequency from 50 kHz to 2 MHz

n TSSOP-14 package

Applications

n Cable Modems

n Set-Top Boxes/ Home Gateways

n DDR Core Power

n High-Efficiency Distributed Power

n Local Regulation of Core Power

Typical Application

20049410

DS200494

www.national.com

12 3 4 5 6 7...22

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