Datasheet > AT1799

AT1799

更新时间： 2024-11-27 04:07:11

品牌	Logo	应用领域
AIMTRON		稳压器
页数	文件大小	规格书
14页	348K
描述
2A Step-Down Voltage Regulator

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技术参数
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AT1799 技术参数

生命周期：	Transferred	包装说明：	,
Reach Compliance Code：	unknown	风险等级：	5.77
Base Number Matches：	1

AT1799 数据手册

AT1799

2A Step-Down Voltage Regulator

Feature

Description

AT1799 is a voltage-mode PWM step-down

DC-DC converter capable of driving up to 2A

loads over a wide input supply range with excellent

line and load regulation characteristics. High

efficiency is obtained through the use of a low

Rds(on) P-channel power switch.

‧ 4.75V to 16V Supply Voltage Operating

Range.

‧ 380KHz ±15% Fixed Switching Frequency.

‧ Voltage-Mode PWM Step-Down Regulator.

‧ Built-in Power MOSFET, Rds(on)≒100mΩ.

‧ 2A Output Current, Up to 91.9% Efficiency

‧ 1.215V±1.5% Internal Reference

‧ Shutdown Current less than 20uA.

‧ Thermal-Shutdown and Built-in Soft-Start.

‧ Cycle-by-Cycle Current-Limit Protection.

‧ Short Circuitry Protection.

It uses a fixed switching frequency up to 380KHz

thus allowing smaller sized components. The

output voltage level is user-programmable via an

external resistive voltage divider. The built-in

soft-start can reduce inrush current on the input

source at turn on.

‧ Under-Voltage Lockout Protection.

‧ Output Voltage Adjustable From 1.215V to

16V.

The device also has built-in cycle-by-cycle

current-limit, thermal shutdown, under-voltage

lockout and an ON/OFF logic-control that can

power down the regulator to a shutdown mode. In

shutdown mode the regulator draws less than 20uA

of supply current. When a short circuit is detected

on the output , the device immediately change

switching frequency to 42 KHz and duty cycle is

limited to 5% to protect IC from damage.

‧ SOP-8 Package.

Application

‧ Distributed Power Systems

‧ Battery Charger.

‧ Palmtop Computers, PDAs.

‧ DSL Modems

AT1799 is available in SOP-8 package.

Block Diagram

Aimtron reserves the right without notice to change this circuitry and specifications.

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878

8/23/2006 REV:1.1

Fax: 886-3-563-0879

WWW: http://www.aimtron.com.tw

Email: service@aimtron.com.tw

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