NJM2829

- 4 -

Ver.2012-09-07

TYPICALAPPLICATION

ON/OFF control

ON/OFF control can be achieved by applying positive control voltage to CONTROL terminal.

Apply positive Vcont ("H") to make chip to be ON (Enabled), and either Vcont is "L" or open (High Z) to make chip to

be OFF (Disabled).

The relations between Vcont and the state is as follows:

Vcont +1.6V

≤ Vcont ≤ +5V ("H" level):

ON state

Vcont 0V

≤ Vcont ≤ +0.6V ("L" level):

OFF state

Vcont +0.6V < Vcont < +1.6V ("L" level):

Undefined

In case ON/OFF control is not used, keep applying positive Vcont to CONTROL terminal to make chip ON.

Note that negative Vcont does not make the chip enabled.

VIN

VOUT

CONTROL

GND

0.1µF

2.2µF*3

VOUT

VIN

R

CS

CONTROL

CS

0.047µF

NJM2829

*3) Vo>-0.9V version: Co=4.7

µ F(Ceramic)

*In the case of using a resistance "R" to CONTROL terminal.

If this resistor is inserted, it can reduce the control current when the control voltage is high.

The applied voltage to control terminal should set to consider voltage drop through the resistor “R” and the minimum

control voltage for ON-state.

The VCONT(ON)and ICONT have temperature dependence as shown in the "Control Current vs. Temperature" and "

Control Voltage vs. Temperature" characteristics.

Therefore, the resistance "R" should be selected to consider the temperature characteristics.