LTC1478

更新时间： 2024-09-24 22:57:35

品牌	Logo	应用领域
凌特 - Linear		开关
页数	文件大小	规格书
8页	226K
描述
Single and Dual Protected High Side Switches

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中文翻译

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LTC1478 数据手册

LTC1477/LTC1478

Single and Dual Protected

High Side Switches

FEATURES

DESCRIPTION

The LTC^®1477/LTC1478 protected high side switches

provide extremely low R_DS(ON)switching with built-in

protectionagainstshort-circuitandthermaloverloadcon-

ditions. A built-in charge pump generates gate drive

higherthanthesupplyvoltagetofullyenhancetheinternal

NMOSswitch. Thisswitchhasnoparasiticbodydiodeand

therefore no current flows through the switch when it is

turned off and the output is forced above the input supply

voltage. (DMOS switches have parasitic body diodes that

become forward biased under these conditions.)

■

Extremely Low R_DS(ON)Switch: 0.07

Ω

■

No Parasitic Body Diode

■

Built-In Short-Circuit Protection: 2A

■

Built-In Thermal Overload Protection

■

Operates from 2.7V to 5.5V

■

Inrush Current Limited

■

Ultralow Standby Current: 0.01µA

■

Built-In Charge Pump

Controlled Rise and Fall Times: t_R= 1ms

Single Switch in 8-Pin SO Package

■

Dual Switch in Narrow 16-Pin SO Package

Two levels of protection are provided by the

LTC1477/LTC1478. The first level of protection is short-

circuit current limit which is set at 2A. The short-circuit

current can be reduced to as low as 0.85A by disconnect-

ing portions of the power device (see Applications Infor-

mation). The second level of protection is provided by

thermal overload protection which limits the die tempera-

ture to approximately 130°C.

APPLICATIONS

■

Notebook Computer Power Management

■

Power Supply/Load Protection

■

Supply/Battery Switch-Over Circuits

■

Circuit Breaker Function

■

"Hot Swap" Board Protection

The LTC1477 single is available in 8-lead SO packaging.

The LTC1478 dual is available in 16-lead SO packaging.

■

Peripheral Power Protection

, LTC and LT are registered trademarks of Linear Technology Corporation.

SI PLIFIED BLOCK DIAGRAM

IN3

INS

IN1

IN2

Switch Output Voltage

5.20

= 25°C

GATE CHARGE

AND

DISCHARGE

CONTROL LOGIC

= V = V = V = 5V

IN1

IN2 IN3 INS

5.10

5.00

4.90

4.80

4.70

4.60

CURRENT LIMIT

AND THERMAL

SHUTDOWN

CHARGE

PUMP

OUT

0.5

0.75 1.00

1.25 1.50

0.25

OUTPUT CURRENT (A)

*NMOS SWITCHES WITH NO PARASITIC BODY DIODES

LTC1477/1478 • TA01

LTC1477/1478 • TP02

12 3 4 5 6 7 8

中文翻译

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与LTC1478相关器件

型号	品牌	获取价格	描述	数据表
LTC1478CS	Linear	获取价格	Single and Dual Protected High Side Switches
LTC1478CS#PBF	Linear	获取价格	LTC1478 - Single and Dual Protected High Side Switches; Package: SO; Pins: 16; Temperature
LTC1478CS#TR	Linear	获取价格	LTC1478 - Single and Dual Protected High Side Switches; Package: SO; Pins: 16; Temperature
LTC1478CS#TRPBF	Linear	获取价格	暂无描述
LTC1478CS8	Linear	获取价格	IC BUF OR INV BASED PRPHL DRVR, PDSO8, Peripheral Driver
LTC1479	Linear	获取价格	PowerPath Controller for Dual Battery Systems
LTC1479	ADI	获取价格	用于双电池系统的 PowerPath 控制器
LTC1479CG	Linear	获取价格	PowerPath Controller for Dual Battery Systems
LTC1479CG#TR	Linear	获取价格	LTC1479 - PowerPath Controller for Dual Battery Systems; Package: SSOP; Pins: 36; Temperat
LTC1479CG#TRPBF	Linear	获取价格	LTC1479 - PowerPath Controller for Dual Battery Systems; Package: SSOP; Pins: 36; Temperat

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