L431VB 查看數據表（PDF） - Niko Semiconductor

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L431VB

2.5V Low-Voltage Adjustable Precision Shunt Regulator

Niko Semiconductor 

NIKO-SEM

2.5V Low-Voltage Adjustable

Precision Shunt Regulator

L431

TEST CIRCUITS

VIN

VKA VIN

VKA VIN

I REF

IK

R1 I REF

IK

V REF

R2

VKA

I K (OFF)

- TEST CIRCUIT 1 -

(VKA = VREF)

- TEST CIRCUIT 2 -

(VKA > VREF)

- TEST CIRCUIT 3 -

(OFF STATE CURRENT)

Stability Boundary Condition For Shunt Regulation

VS. Cathode Current and Load Capacitance

01

2

3

4

56

The areas under the curves represent conditions that may

cause the device to oscillate. For curves B, C and D, R1 and

VBATT were adjusted to establish the initial VKA and IKA

conditions with CL = 0. VBATT and CL then were adjusted

to determine the ranges of stability.

Test Circuit for Vka > Vref

150

Ik

VBATT

R1

CL

1

L431

R2

10K

Test Circuit for Vka = Vref

150

Ik

1

CL

L431

3

JAN-08-Y02

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