TL1431

PRECISION PROGRAMMABLE REFERENCE

SLVS062F – DECEMBER 1991 – REVISED JANUARY 2000

13

POST OFFICE BOX 655303

TYPICAL CHARACTERISTICS

3

2

1

0

01

2

3

4

4

5

PULSE RESPONSE

6

56

7

TEST CIRCUIT FOR PULSE RESPONSE

TA = 25°C

Input

Output

t – Time –

µs

Pulse

Generator

f = 100 kHz

50

Ω

220

Ω

Output

GND

VI

Figure 14

50

40

10

0

0.001

0.01

0.1

1

70

90

100

10

30

80

60

20

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

Stable

A

B

C

D

IKA = 10 mA

TA = 25°C

CL

CL

150

Ω

150

Ω

IKA

IKA

VBATT

VBATT

R1 =

10 k

Ω

R2

+

–

+

–

VI

VI

† 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

are then adjusted to determine the ranges of stability.

Figure 15