NJM2884(2006) Ver la hoja de datos (PDF) - Japan Radio Corporation

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componentes Descripción

Fabricante

NJM2884
(Rev.:2006)

LOW DROPOUT VOLTAGE REGULATOR

Japan Radio Corporation  

NJM2884

2 In use of ON/OFF CONTROL:

VIN

0.33µF

R

VIN

VOUT

NJM2884

CONTROL

GND

(*3)

2.2µF

VOUT

(*3) Vo ≤ 2.6V version: Co=4.7µF

State of control terminal:

•“H”→ output is enabled.

•“L” or “open” → output is disabled.

Input Capacitance CIN

Input Capacitance CIN is required to prevent oscillation and reduce power supply ripple for applications with high

power supply impedance or a long power supply line.

Use the CIN value of 0.33µF greater to avoid the problem.

CIN should connect between GND and VIN as short as possible.

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.

-4-

Ver.2006-12-07

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