LTC1157CS8 Datasheet

IC型號：
LTC1157CS8
PDF描述：
3.3V Dual Micropower High-Side/Low-Side MOSFET Driver
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223.79KB
PDF頁數(shù)：
8頁
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LTC1157

3.3V Dual Micropower

High-Side/Low-Side MOSFET Driver

FEATURES

DESCRIPTIO

Allows Lowest Drop 3.3V Supply Switching

Operates on 3.3V or 5V Nominal Supplies

3 Microamps Standby Current

80 Microamps ON Current

Drives Low Cost N-Channel Power MOSFETs

No External Charge Pump Components

Controlled Switching ON and OFF Times

Compatible with 3.3V and 5V Logic Families

Available in 8-Pin SOIC

APPLICATI

Notebook Computer Power Management

Palmtop Computer Power Management

P-Channel Switch Replacement

Battery Charging and Management

Mixed 5V and 3.3V Supply Switching

Stepper Motor and DC Motor Control

Cellular Telephones and Beepers

The LTC1157 dual 3.3V micropower MOSFET gate driver

makes it possible to switch either supply or ground

reference loads through a low R

DS(ON)

N-channel switch

(N-channel switches are required at 3.3V because P-

channel MOSFETs do not have guaranteed R

DS(ON)

with

鈮?/div>

3.3V). The LTC1157 internal charge pump boosts

the gate drive voltage 5.4V above the positive rail (8.7V

above ground), fully enhancing a logic level N-channel

switch for 3.3V high-side applications and a standard N-

channel switch for 3.3V low-side applications. The gate

drive voltage at 5V is typically 8.8V above supply (13.8V

above ground), so standard N-channel MOSFET switches

can be used for both high-side and low-side applications.

Micropower operation, with 3碌A(chǔ) standby current and

80碌A(chǔ) operating current, makes the LTC1157 well suited

for battery-powered applications.

The LTC1157 is available in both 8-pin DIP and SOIC.

TYPICAL APPLICATI

Ultra Low Voltage Drop 3.3V Dual High-Side Switch

3.3V

GATE VOLTAGE 鈥?SUPPLY VOLTAGE (V)

10碌F

2.0 2.5

3.3V

LOGIC

IN1

LTC1157

IN2

GND

(8.7V)

IRLR024

3.3V

LOAD

3.3V

LOAD

LTC1157 鈥?TA01

Gate Voltage Above Supply

3.0 3.5 4.0 4.5 5.0 5.5

SUPPLY VOLTAGE (V)

6.0

LTC1157 鈥?TA02

數(shù)據(jù)列表
LTC1157
標準包裝
100
類別
集成電路 (IC)
家庭
PMIC - MOSFET，電橋驅(qū)動器 - 外部開關(guān)
系列
-
配置
高端或低端
輸入類型
非反相
延遲時間
230µs
電流 - 峰
-
配置數(shù)
2
輸出數(shù)
2
高端電壓 - 最大（自引導(dǎo)啟動）
-
電源電壓
3.3 V ~ 5 V
工作溫度
0°C ~ 70°C
安裝類型
表面貼裝
封裝/外殼
8-SOIC（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝
8-SOIC
包裝
管件

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