TLVH431ACDBVT datasheet(6/54 Pages) TI

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5.5 TLVH43x Electrical Characteristics

at 25°C free-air temperature (unless otherwise noted)

PARAMETER

TEST CONDITIONS

TLVH431

TLVH432

UNIT

MIN

TYP

MAX

VREF

Reference voltage

VKA = VREF,

IK = 10mA

TA = 25°C

1.222

1.24

1.258

TA = full range,

See Figure 6-1 (1)

TLVH431C

1.21

1.27

TLVH431I

1.202

1.278

TLVH431Q

1.194

1.286

VREF(dev)

VREF deviation over full

temperature range(2)

VKA = VREF, IK = 10mA, See Figure 6-1 (1)

TLVH431C

TLVH431I

TLVH431Q

DVREF

DVKA

Ratio of VREF change to

cathode voltage change

IK = 10mA, VK = VREF to 18V, See Figure 6-2

–1.5

–2.7 mV/V

Iref

Reference terminal current

IK = 10mA, R1 = 10kΩ, R2 = open, See Figure 6-2

0.1

0.5

μA

Iref(dev)

Iref deviation over full

temperature range(2)

IK = 10mA, R1 = 10kΩ, R2 = open,

See Figure 6-2 (1)

TLVH431C

0.05

0.3

μA

TLVH431I

0.1

0.4

TLVH431Q

0.15

0.5

IK(min)

Minimum cathode current

for regulation

VKA = VREF, See Figure 6-1

100

μA

IK(off)

Off-state cathode current

VREF = 0, VKA = 18V, See Figure 6-3

0.02

0.1

μA

|zKA|

Dynamic impedance(3)

VKA = VREF, f ≤ 1kHz, IK = 0.1mA to 70mA,

See Figure 6-1

0.25

0.4

Ω

(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, αVREF, is defined as:

(

)

REF(dev )

REF

25 C

ppm

ö è

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

αVREF 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 6-2), the total dynamic impedance of the circuit is defined as:

¢ =

TLVH431, TLVH431A, TLVH431B, TLVH432, TLVH432A, TLVH432B

SLVS555N – NOVEMBER 2004 – REVISED JUNE 2024

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