TL431 Datasheet, PDF (10/23 Pages) Motorola, Inc – PROGRAMMABLE PRECISION REFERENCES

NXP Semiconductors
TL431 family
Adjustable precision shunt regulator
5.0
I_ref
(μA)
4.0
3.0
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0
ΔV_ref
(mV)
−20
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2.0
−40
1.0
0.0
−75
−25
25
75
125
T_amb (°C)
Fig 6.
I_K = 10 mA; R1 = 10 kΩ; R2 = open
Reference current as a function of ambient
temperature; typical values
−60
0
10
20
30
40
V_KA (V)
Fig 7.
I_K = 10 mA; T_amb = 25 °C
Reference voltage variation as a function of
cathode-anode voltage; typical values
INPUT
R1
I_ref
V_KA
I_K
R2
V_ref
V_KA = V_ref × _⎝⎛1 + ^RR----¹²--_⎠⎞ + I_ref × R1
Fig 8. Test circuit to Figure 6 and Figure 7
GND
006aab576
TL431_FAM_2
Product data sheet
Rev. 02 — 20 January 2010
© NXP B.V. 2010. All rights reserved.
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