4

Test Circuit

Typical Application Circuits

Notes for Typical Application Circuits:

1. For the series regulator applications, add a compensation capacitor C1 between

CATHODE and REF is strongly recommended to improve the stability of output

voltage.

2. Set Vo according to the following equation: Vo=VREF(1+R1/R2)+IREFxR1.

3. Choose the Value for RB as below:

B

(1). The maximum limit for RB should be such that the cathode current (I

B

K) is greater

than the minimum operating current (0.5mA) at VIN(MIN).

(2). The minimum limit for RB should be such that the cathode current (I

B

K) does not

exceed 100mA under all load conditions, and the instantaneous turn-on value for

IK does not exceed 120mA.

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