Page 1
CHIP FORM
D
Temperature Compensated
D
Programmable Output V oltage
D
Low Output Resistance
D
Low Output Noise
D
Sink Capability up to 100 mA
description
The TL430 is a 3-terminal adjustable shunt
regulator, featuring excellent temperature
stability, wide operating current range, and low
output noise. The output voltage can be set by two
external resistors to any desired value between
3 V and 30 V . The TL430 can replace zener diodes
in many applications, providing improved
performance.
The TL430C is characterized for operation from
0°C to 70°C.
TL430
ADJUSTABLE SHUNT REGULATORS
SLVS050B – JUNE 1976 – REVISED JULY 1999
LP PACKAGE
(TOP VIEW)
CATHODE
ANODE
REF
symbol
REF
CATHODEANODE
AVAILABLE OPTIONS
PACKAGED DEVICES
T
A
0°C to 70°C TL430CLP TL430Y
The LP package is available taped and reeled. Add R suffix to device
type (e.g., TL430CLPR). Chip forms are tested at 25°C.
PLASTIC
(LP)
(Y)
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Copyright 1999, Texas Instruments Incorporated
1
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TL430
PARAMETER
TEST CONDITIONS
UNIT
I
g
mA
ADJUSTABLE SHUNT REGULATORS
SLVS050B – JUNE 1976 – REVISED JULY 1999
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Regulator voltage (see Note 1) 30 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous regulator current 150 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance, θJA (see Notes 2 and 3): 156°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All voltage values are with respect to the anode terminal.
2. Maximum power dissipation is a function of TJ(max),
ambient temperature is PD = (TJ(max) – TA)/
3. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace
length of zero.
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
stg
θ
, and TA. The maximum allowable power dissipation at any allowable
θ
JA
JA
. Operating at the absolute maximum TJ of 150°C can impact reliability.
recommended operating conditions
MIN MAX UNIT
Regulator voltage, V
Regulator current, I
Operating free-air temperature range, T
Z
Z
A
TL430C 0 70 °C
V
ref
30 V
2 100 mA
electrical characteristics over recommended operating conditions, TA = 25°C (unless otherwise
noted)
TEST
FIGURE
V
I(ref)
αV
I(ref)
I
I(ref)
I
ZK
ZK
r
z
V
n
NOTES: 4. The average power dissipation, VZ • IZ • duty cycle, must not exceed the maximum continuous rating in any 10-ms interval.
Reference input voltage 1 VZ = V
Temperature coefficient of reference input
voltage
Reference input current 2
Regulator current near lower knee of
regulation range
Regulator current at maximum
limit of regulation range
Differential regulator resistance
(see Note 5)
Noise voltage 2 f = 0.1 Hz to 10 Hz
5. The regulator resistance for VZ > V
R1
rzȀ+
ǒ
r
1
z
)
R2
Ǔ
, rz, is given by:
I(ref)
1
1 VZ = V
1 VZ = V
2
1
I(ref)
VZ = V
I(ref)
TA = 0°C to 70°C
IZ = 10 mA,
R2 = ∞
I(ref)
I(ref)
VZ = 5 V to 30 V, See Note 4 100
VZ = V
I(ref),
∆IZ = (52 – 2) mA
, IZ = 10 mA 2.5 2.75 3 V
,
IZ = 10 mA,
R1 = 10 kΩ,
VZ = 3 V 50
VZ = 12 V 200
VZ = 30 V 650
TL430C
MIN TYP MAX
120 ppm/°C
3 10 µA
0.5 2 mA
50
1.5 3 W
µV
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Page 3
PARAMETER
TEST CONDITIONS
UNIT
I
g
mA
TL430
ADJUSTABLE SHUNT REGULATORS
SLVS050B – JUNE 1976 – REVISED JULY 1999
electrical characteristics over recommended operating conditions, TA = 25°C (unless otherwise
noted)
TEST
FIGURE
V
I
I(ref)
I
ZK
ZK
r
z
V
NOTES: 4. The average power dissipation, VZ • IZ • duty cycle, must not exceed the maximum continuous rating in any 10-ms interval.
Reference input voltage 1 VZ = V
I(ref)
Reference input current 2
Regulator current near lower knee of
regulation range
Regulator current at maximum limit of
regulation range
Differential regulator resistance (see Note 5) 1
Noise voltage 2 f = 0.1 Hz to 10 Hz VZ = 12 V 200 µV
n
5. The regulator resistance for VZ > V
R1
rzȀ+
ǒ
r
1
z
)
R2
Ǔ
, rz, is given by:
I(ref)
IZ = 10 mA,
R2 = ∞
1 VZ = V
1 VZ = V
2
VZ = 5 V to 30 V, See Note 4 100
VZ = V
∆IZ = (52 – 2) mA
, IZ = 10 mA 2.5 2.75 3 V
I(ref)
R1 = 10 kΩ,
I(ref)
I(ref)
. . .
I(ref),
VZ = 3 V 50
VZ = 30 V 650
TL430Y
MIN TYP MAX
3 10 µA
0.5 2 mA
50
1.5 3 W
PARAMETER MEASUREMENT INFORMATION
Input
V
I(ref)
Figure 1. Test Circuit for VZ = V
I
Z
TL430
V
Z
I(ref)
I
Z
TL430
Ǔ
)
V
I
I(ref)
Z
Input
R1
R2
VZ+
V
I
I(ref)
V
I(ref)
I(ref)
R1
ǒ
1
)
R2
Figure 2. Test Circuit for VZ > V
I(ref)
R1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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TL430
ADJUSTABLE SHUNT REGULATORS
SLVS050B – JUNE 1976 – REVISED JULY 1999
TYPICAL CHARACTERISTICS
SMALL-SIGNAL REGULATOR IMPEDANCE
vs
FREQUENCY
3
Ωz
– Small-Signal Regulator Impedance –
z
2.8
2.6
2.4
2.2
2
1.8
1.6
1.4
10 10
VZ = V
I(ref)
TA = 25°C
2
3
10
f – Frequency – Hz
Figure 3 Figure 4
10
CATHODE CURRENT
vs
CATHODE VOLTAGE
160
VZ = V
I(ref)
140
120
100
I – Cathode Current – mA
4
10
5
10
6
TA = 25°C
80
60
40
20
0
01 2
V – Cathode Voltage – V
I
ZM
I
Z
I
ZK
34
APPLICATION INFORMATION
V
+
V+
R
R1
V
I(ref)
R2
VO[
R1
ǒ
1
)
R2
Ǔ
V
I(ref)
V
O
30 Ω
R2
VO[ǒ1
4.7 kΩ
R1
)
R1
R2
Ǔ
V
I(ref)
Figure 5. Shunt Regulator Figure 6. Series Regulator
V
O
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Page 5
TL430
ADJUSTABLE SHUNT REGULATORS
SLVS050B – JUNE 1976 – REVISED JULY 1999
APPLICATION INFORMATION
V+
V+
IO[
V
R
I(ref)
CL
V+
R
CL
I
O
Min VO+
µA7805 Regulator
IN
OUT
GND
VO+ǒ1
V
)
I(ref)
R1
R2
)
R1
R2
Ǔ
V
I(ref)
5V
Figure 7. Current Limiter Figure 8. Output Control of a 3-Terminal
Fixed Regulator
R1
V
O
V+
R1
V
O
V
O
R2
VO[
R2
R1
ǒ
1
)
R2
Ǔ
V
I(ref)
V
limit
[ǒ1
)
R1
R2
Q1
Ǔ
ǒ
V
)
I(ref)
Figure 9. Higher-Current Applications Figure 10. Crowbar
V
CC
R1B
R1A
R1B
R2A
R2B
Low limit[V
High limit[V
I(ref)
I(ref)
ǒ
1
ǒ
1
)
)
R2B
R1A
R2A
Ǔ
)
Ǔ
Figure 11. VCC Monitor
V
BE(Q1)
V
D
Ǔ
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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Copyright 1999, Texas Instruments Incorporated
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