Datasheet > LTC1981

LTC1981

更新时间： 2023-12-20 18:46:09

品牌	Logo	应用领域
亚德诺 - ADI		开关控制器
页数	文件大小	规格书
8页	152K
描述
采用 SOT-23 封装的单通道和双通道微功率高端开关控制器

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LTC1981 数据手册

LTC1981/LTC1982

Single and Dual Micropower

High Side Switch Controllers

in SOT-23

FEATURES

DESCRIPTIO

The LTC^®1981/LTC1982 are low-power, self-contained

N-channel MOSFET drivers. An internal voltage tripler

allows gates to be driven without the use of any external

components. Internal regulation circuitry allows quies-

centcurrenttodropto10µAperdriver(20µAforLTC1981)

once the gates are charged.

■

No External Components Required

■

Internal Voltage Triplers Produce High Side

Gate Drive for Logic Level FETs

Ultralow Power:

■

10µA Per Driver ON Current (LTC1982)

20µA ON Current (LTC1981)

<1µA Shutdown Current

Low quiescent current and low shutdown current (under

1µA) make these parts ideal for battery and other power

constrained systems. The wide input voltage range ac-

commodates a variety of battery/input configurations.

■

V_CCRange: 1.8V to 5V

■

Gate Drive Outputs Driven to Ground During

Shutdown

■

Gate Drive Outputs Internally Clamped to 7.5V Max

■

Gate drive is internally clamped to 7.5V providing protec-

tion to the external MOSFET gate. The MOSFETs can be

driven in either high side or low side mode.

“Gate Drive Ready” Output (LTC1981)

Ultrasmall Application Circuit

5-Pin SOT-23 Package (LTC1981)

^{6-Pin SOT-23 Pa}U^{ckage (LTC1982)}

The LTC1981 single driver version also includes a gate

drive ready pin and twice the drive current capacity of the

dual driver LTC1982.

APPLICATIO S

■

Cellular Telephones

Portable POS Terminal

Handheld Battery Powered Equipment

The LTC1981 is available in a 5-pin SOT-23. The LTC1982

is available in a 6-pin SOT-23.

■

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

TYPICAL APPLICATIONS

Single High Side Switch Controller

Dual High Side Switch Controller

1.8V TO 5.0V

Si3442DV

1/2 Si6925DQ

10µF

1/2 Si6925DQ

GATE

GATE 1 GATE 2

LTC1982

LTC1981

GND

100k

LOAD

LOAD 1

LOAD 2

GDR

SHDN

SHDN 1 GND SHDN 2

GATE

DRIVE

READY

SHDN 1

SHDN 2

SHDN

1981/82 TA01

1981/82 TA02

12 3 4 5 6 7 8

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