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a

V

REF

ppm

+

V

REF(dev)

V

+25

D

T

A

z

KA +

∆V

KA

∆I

K

z

KA +

∆V

∆I [

z

KA

1 )

R1

R2

TLVH431 Electrical Characteristics

TLVH431, TLVH431A, TLVH431B

TLVH432, TLVH432A, TLVH432B

LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS

SLVS555F – NOVEMBER 2004 – REVISED OCTOBER 2005

at 25

°C free-air temperature (unless otherwise noted)

TLVH431

TLVH432

PARAMETER

TEST CONDITIONS

UNIT

MIN

TYP

MAX

1.222

1.24

1.258

TLVH431C

1.21

1.27

Reference voltage

V

TLVH431I

1.202

1.278

See Figure 1(1)

TLVH431Q

1.194

1.286

TLVH431C

4

12

TLVH431I

6

20

mV

TLVH431Q

11

31

–1.5

–2.7

mV/V

cathode voltage change

Reference terminal current

0.1

0.5

µA

TLVH431C

0.05

0.3

TLVH431I

0.1

0.4

µA

See Figure 2(1)

TLVH431Q

0.15

0.5

Minimum cathode current

60

100

µA

for regulation

Off-state cathode current

0.02

0.1

µA

0.25

0.4

Ω

See Figure 1

(1)

Full temperature ranges are –40

°C to 125°C for TLVH431Q, –40°C to 85°C for TLVH431I, and 0°C to 70°C for TLVH431C.

(2)

the rated temperature range. The average full-range temperature coefficient of the reference input voltage,

αV

where

∆T

αV

temperature.

(3)

The dynamic impedance is defined as:

When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is defined as:

8