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TLV431_06 Datasheet(Fiches technique) 6 Page - Texas Instruments

Numéro de pièce TLV431_06
Description  LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS
Télécharger  31 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
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TLV431, TLV431A, TLV431B
LOW VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR
SLVS139S − JULY 1996 − REVISED JANUARY 2006
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
TLV431 electrical characteristics at 25
°C free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TLV431
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
TA = 25°C
1.222
1.24
1.258
VREF
Reference voltage
VKA = VREF,
TA = full range
TLV431C
1.21
1.27
V
VREF
Reference voltage
VKA = VREF,
IK = 10 mA
TA = full range
(see Note 4 and
Figure 1)
TLV431I
1.202
1.278
V
IK = 10 mA
(see Note 4 and
Figure 1)
TLV431Q
1.194
1.286
VREF deviation over full
VKA = VREF, IK = 10 mA
TLV431C
4
12
VREF(dev)
VREF deviation over full
temperature range (see Note 4)
VKA = VREF, IK = 10 mA
(see Note 4 and Figure 1)
TLV431I
6
20
mV
VREF(dev) temperature range (see Note 4)
(see Note 4 and Figure 1)
TLV431Q
11
31
mV
∆VREF
∆VKA
Ratio of VREF change in cathode
voltage change
VKA = VREF to 6 V, IK = 10 mA (see Figure 2)
− 1.5
− 2.7
mV/V
Iref
Reference terminal current
IK = 10 mA, R1 = 10 kΩ, R2 = open (see Figure 2)
0.15
0.5
µA
TLV431C
0.05
0.3
Iref deviation over full
IK = 10 mA, R1 = 10 kΩ, R2 = open
TLV431C
0.05
0.3
Iref(dev)
Iref deviation over full
temperature range (see Note 4)
IK = 10 mA, R1 = 10 kΩ, R2 = open
(see Note 4 and Figure 2)
TLV431I
0.1
0.4
µA
Iref(dev)
temperature range (see Note 4)
(see Note 4 and Figure 2)
TLV431Q
0.15
0.5
µA
IK(min)
Minimum cathode current for
VKA = VREF (see Figure 1)
TLV431C/I
55
80
A
IK(min)
Minimum cathode current for
regulation
VKA = VREF (see Figure 1)
TLV431Q
55
100
µA
IK(off)
Off-state cathode current
VREF = 0, VKA = 6 V (see Figure 3)
0.001
0.1
µA
|zKA|
Dynamic impedance
(see Note 5)
VKA = VREF, f ≤ 1 kHz,
IK = 0.1 mA to 15 mA (see Figure 1)
0.25
0.4
NOTES:
4. Full temperature ranges are − 40
°C to 125°C for TLV431Q, −40°C to 85°C for TLV431I, and 0°C to 70°C for TLV431C.
5. 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:
αV
REF
ppm
°C +
V
REF(dev)
V
REF (TA+25°C)
106
∆T
A
where
∆TA 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.
6. The dynamic impedance is defined as z
ka +
∆V
KA
∆I
K
When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is defined
as:
z
ka +
∆V
∆I [
z
ka
1
) R1
R2




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