TL431CD View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

TL431CD

Programmable voltage reference

STMicroelectronics 

TL431, TL432

Electrical characteristics

Table 5.

Symbol

TL431IY (Tamb = 25°C unless otherwise specified)

Parameter

TL431IY

TL431AIY

Unit

Min. Typ. Max. Min. Typ. Max.

Reference input voltage

Vref

VKA = Vref, Ik = 10 mA

Tmin ≤ Tamb ≤ Tmax

2.44 2.495 2.55 2.47 2.495 2.52 V

2.41

2.58 2.44

2.55

ΔVref

Reference input voltage deviation over temperature

range (1)

VKA = Vref, Ik = 10 mA, Tmin≤ Tamb ≤ Tmax

7 30

7 30 mV

Δ----V---r--e---f

ΔVka

Ratio of change in reference input voltage to change

in cathode to anode voltage

Ik = 10 mA, ΔVKA = 10 V to Vref

Ik = 10 mA, ΔVKA = 36 V to 10 V

-2.7 -1.4

-2 -1

-2.7 -1.4

-2 -1

mV/V

Reference input current

Iref Ik = 10 mA, R1 = 10 kΩ, R2 = ∞

Tmin ≤ Tamb ≤ Tmax

1.8 4

6.5

1.8 4 µA

6.5

Reference input current deviation over temperature

range

ΔIref

Ik = 10 mA, R1 = 10 kΩ, R2 = ∞, Tmin ≤ Tamb ≤

Tmax

0.8 2.5

0.8 1.2 µA

Minimum cathode current for regulation

Imin

VKA = Vref

0.5 1

0.5 0.6 mA

Ioff

⏐ZKA⏐

Off-state cathode current

Tmin ≤ Tamb ≤ Tmax

Dynamic impedance (2)

VKA = Vref, Δ Ik = 1 to 100 mA, F ≤ 1 kHz

2.6 1000

3000

0.22 0.5

2.6 1000 nA

3000

0.22 0.5 Ω

1. See definition of Section 3.1: Reference input voltage deviation over temperature range below.

2. The dynamic impedance is defined as |ZKA| = Δ----Δ-V---I-K-k---A--

3.1

Reference input voltage deviation over temperature range

ΔVref is defined as the difference between the maximum and minimum values obtained over

the full temperature range.

ΔVref = Vref max - Vref min

Figure 6. Reference input voltage deviation over temperature range

Doc ID 4467 Rev 11

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