TL431 Datasheet, PDF (15/23 Pages) Motorola, Inc – PROGRAMMABLE PRECISION REFERENCES

NXP Semiconductors
TL431 family
Adjustable precision shunt regulator
100
I_K
(mA)
80
60
40
(1)
(1)
Stable
Oscillation
Stable
006aab588
20
0
1
10
10²
10³
10⁴
C_L (nF)
T_amb = 25 °C
(1) V_KA = V_ref
V_KA = 5 V: no oscillation
V_KA = 10 V: no oscillation
V_KA = 15 V: no oscillation
Fig 20. All types except TL431XSDT: Cathode current as a function of load capacitance; typical values
150 Ω
I_K
CL
VBATT
R1 = 10 kΩ
I_K
CL
R2
150 Ω
VBATT
GND
006aab589
V_KA = V_ref
T_amb = 25 °C
Fig 21. Test circuit (1) to Figure 20
GND
006aab590
V_KA > 5 V: stable operation
T_amb = 25 °C
Fig 22. Test circuit (2) to Figure 20
TL431_FAM_2
Product data sheet
Rev. 02 — 20 January 2010
© NXP B.V. 2010. All rights reserved.
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