TL1431MFKB datasheet(11/28 Pages) TI

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PULSE RESPONSE

TEST CIRCUIT FOR PULSE RESPONSE

TA = 25°C

Input

Output

t − Time −

µs

Pulse

Generator

f = 100 kHz

Ω

220

Ω

Output

GND

STABILITY BOUNDARY CONDITIONS

0.001

0.01

0.1

100

TEST CIRCUIT FOR CURVE A

TEST CIRCUIT FOR CURVES B, C, AND D

CL − Load Capacitance − µF

A-VKA = VI(ref)

B-VKA = 5 V

C-VKA = 10 V

D-VKA = 15 V

Stable

IKA = 10 mA

TA = 25°C

150

Ω

150

Ω

IKA

VBATT

R1 =

10 k

Ω

−

TL1431

PRECISION PROGRAMMABLE REFERENCE

SLVS062L – DECEMBER 1991 – REVISED OCTOBER 2007

Figure 14.

The areas under the curves represent conditions that may cause the device to oscillate. For curves B, C, and D, R2 and V+ are

adjusted to establish the initial VKA and IKA conditions, with CL = 0. VBATT and CL then are adjusted to determine the ranges of

stability.

Figure 15.

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