TL431 Datasheet, PDF (16/23 Pages) Motorola, Inc – PROGRAMMABLE PRECISION REFERENCES

NXP Semiconductors
TL431 family
Adjustable precision shunt regulator
100
I_K
(mA)
80
60
40
(1)
Stable
(2)
Oscillation
006aab591
(1)
(2)
Stable
20
0
10^−1
1
10
10²
10³
10⁴
C_L (nF)
T_amb = 25 °C
(1) V_KA = V_ref
(2) V_KA = 5 V
V_KA = 10 V: no oscillation
V_KA = 15 V: no oscillation
Fig 23. 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
V_KA = V_ref
T_amb = 25 °C
GND
006aab589
Fig 24. Test circuit (1) to Figure 23
GND
006aab590
V_KA = 5 V
V_KA > 10 V: stable operation
T_amb = 25 °C
Fig 25. Test circuit (2) to Figure 23
TL431_FAM_2
Product data sheet
Rev. 02 — 20 January 2010
© NXP B.V. 2010. All rights reserved.
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