TLVH431ACLP datasheet(9/37 Pages) TI

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REF

ppm

REF(dev)

REF (TA

+25

oC)

106

KA +

∆V

∆I

KA +

∆V

∆I [

1 )

TLVH431A Electrical Characteristics

DVREF

DVKA

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)

TLVH431A

TLVH432A

PARAMETER

TEST CONDITIONS

UNIT

MIN

TYP

MAX

TA = 25°C

1.228

1.24

1.252

TLVH431AC

1.221

1.259

VKA = VREF,

VREF

Reference voltage

TA = full range,

IK = 10 mA

TLVH431AI

1.215

1.265

See Figure 1)(1)

TLVH431AQ

1.209

1.271

TLVH431AC

VREF deviation over full

VREF(dev)

VKA = VREF, IK = 10 mA, See Figure 1(1)

TLVH431AI

temperature range(2)

TLVH431AQ

Ratio of VREF change to

VK = VREF to 18 V, IK = 10 mA, See Figure 2

–1.5

–2.7

mV/V

cathode voltage change

Iref

Reference terminal current

IK = 10 mA, R1 = 10 kΩ, R2 = open, See Figure 2

0.1

0.5

µA

TLVH431AC

0.05

0.3

Iref deviation over full

IK = 10 mA, R1 = 10 kΩ, R2 = open,

Iref(dev)

TLVH431AI

0.1

0.4

µA

temperature range(2)

See Figure 2(1)

TLVH431AQ

0.15

0.5

Minimum cathode current

IK(min)

VKA = VREF, See Figure 1

100

µA

for regulation

IK(off)

Off-state cathode current

VREF = 0, VKA = 18 V, See Figure 3

0.02

0.1

µA

VKA = VREF, f ≤ 1 kHz, IK = 0.1 mA to 80 mA,

|zKA|

Dynamic impedance(3)

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 deviation parameters VREF(dev) and Iref(dev) are defined as the differences between the maximum and minimum values obtained over

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

αV

REF, is defined as:

where

∆T

A is the rated operating free-air temperature range of the device.

αV

REF can be positive or negative, depending on whether minimum VREF or maximum VREF, respectively, occurs at the lower

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:

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