NJM2857 查看數據表（PDF） - Japan Radio Corporation

零件编号

产品描述 (功能)

生产厂家

NJM2857

LOW DROPOUT VOLTAGE REGULATOR

Japan Radio Corporation  

TYPICAL APPLICATIONS

1 In the case where ON/OFF Control is not required:

VIN

VIN

VOUT

1.0µF

R

NJM2857

CONTROL

GND

(*4) 1.7V<Vo≤2.4V version: Co=10µF

Vo≤1.7V version:Co=22µF

Connect control terminal to VIN terminal

2 In use of ON/OFF CONTROL:

VIN

VIN

VOUT

1.0µF

R

NJM2857

CONTROL

GND

NJM2857 www.DataSheet4U.com

(*4)

4.7µF

VOUT

(*4)

4.7µF

VOUT

(*4) 1.7V<Vo≤2.4V version: Co=10µF

Vo≤1.7V version:Co=22µF

State of control terminal:

•“H”→ output is enabled.

•“L” or “open” → output is disabled.

*In the case of using a resistance "R" between VIN and control.

The current flow into the control terminal while the IC is ON state (ICONT) can be reduced when a pull up resistance

"R" is inserted between VIN and the control terminal.

The minimum control voltage for ON state (VCONT (ON)) is increased due to the voltage drop caused by ICONT and the

resistance "R". The ICONT is temperature dependence as shown in the "Control Current vs. Temperature"

characteristics. Therefore, the resistance "R" should be carefully selected to ensure the control voltage exceeds the

VCONT (ON) over the required temperature range.

Ver.2010-02-08

-5-

Share Link: