LM2717MTX Datasheet

IC型號：
LM2717MTX
PDF描述：
Dual Step-down DC/DC Converter
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672.29KB
PDF頁數(shù)：
12頁
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NSC

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LM2717 Dual Step-down DC/DC Converter

PRELIMINARY

May 2005

LM2717

Dual Step-down DC/DC Converter

General Description

The LM2717 is composed of two PWM DC/DC buck (step-

down) converters. The first converter is used to generate a

fixed output voltage of 3.3V. The second converter is used to

generate an adjustable output voltage. Both converters fea-

ture low R

DSON

(0.16鈩? internal switches for maximum effi-

ciency. Operating frequency can be adjusted anywhere be-

tween 300kHz and 600kHz allowing the use of small external

components. External soft-start pins for each enables the

user to tailor the soft-start times to a specific application.

Each converter may also be shut down independently with

its own shutdown pin. The LM2717 is available in a low

profile 24-lead TSSOP package ensuring a low profile over-

all solution.

Features

Fixed 3.3V output buck converter with a 2.2A, 0.16鈩?

internal switch

Adjustable buck converter with a 3.2A, 0.16鈩? internal

switch

Operating input voltage range of 4V to 20V

Input undervoltage protection

300kHz to 600kHz pin adjustable operating frequency

Over temperature protection

Small 24-Lead TSSOP package

Applications

TFT-LCD Displays

Handheld Devices

Portable Applications

Laptop Computers

Typical Application Circuit

20078501

漏 2005 National Semiconductor Corporation

DS200785

www.national.com

制造商
National Semiconductor (TI)
輸入電壓
20 V
開關(guān)頻率
600 KHz
輸出電壓
1.265 V to 18 V, 3.3 V
輸出電流
3.2 A, 2.2 A
輸出端數(shù)量
2
最大工作溫度
+ 125 C
安裝風(fēng)格
SMD/SMT
封裝 / 箱體
TSSOP-24
最小工作溫度
- 40 C
封裝
Reel
工廠包裝數(shù)量
2500

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