Calogic’s CL432 is a 3-terminal Adjustable Shunt Regulator
highly accurate 1.25V bandgap reference with a 0.5%
tolerance. The device offers thermal stability, wide operating
current (100mA) and an extended temperature range of 0
o
to
105
o
C for operation in power supply applications. The CL432
offers a wide operating voltage range of up to 18V and is an
excellent choice for voltage reference requirements in an
isolated feedback circuit for 3.0V to 3.3V switching mode
power supplies. The tight tolerance guarantees a lower
design cost for the power supply manufacturer by virtually
eliminating the need for an extra power supply manufacturing
process of the power supply.
The device is housed in several package options to meet the
designers criteria.
ORDERING INFORMATION
Part
CL432LP
CL432D
CL432VS
CL432S
PIN CONFIGURATION
(Top View)
Package
TO-92
8-Pin Plastic SOIC
SOT-23
SOT-89
Temperature Range
0 to 105
o
C
0 to 105
o
C
0 to 105
o
C
0 to 105
o
C
•
•
•
•
•
•
Temperature-Compensated: 50ppm/
o
C
Trimmed 0.5% Bandgap Reference
Internal Amplifier with 150mA Capability
Nominal Temperature Range Extended to 105
o
C
Low Frequency Dynamic Output Impedance: < 150m
Low Output Noise
TO-92 (LP)
CATHODE
CATHODE
ANODE
ANODE
ANODE
REFERENCE
1G-33
SOIC (D)
1
2
3
4
8
7
6
5
REFERENCE
ANODE
ANODE
N/C
1G-34
N/C
SOT-23 (VS)
CATHODE
ANODE
REFERENCE
SOT-89 (S)
CATHODE
ANODE
REFERENCE
1J-22
1G-35
CALOGIC CORPORATION,
237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CL432
CORPORATION
ABSOLUTE MAXIMUM RATINGS
SYMBOL
V
KA
I
AK
I
KA
I
REF
P
D
PARAMETER
Cathode-Anode Reverse Breakdown
Anode-Cathode Forward Current
Operating Cathode Current
Reference Input Current
Continuous Power at 25
o
C
TO-92
8L SOIC
SOT-23
SOT-89
Junction Temperature
Storage Temperature
Lead Temperature, Soldering 10 Seconds
RATING
18
1
100
1
UNITS
V
A
mA
mA
775
750
1000
200
150
–65 to 150
300
mW
mW
mW
mW
o
o
o
T
J
T
STG
T
L
C
C
C
Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification
is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.
RECOMMENDED CONDITIONS
SYMBOL
V
KA
I
K
PARAMETER
Cathode Voltage
Cathode Current
RATING
V
REF
to 18
10
UNIT
V
mA
TYPICAL THERMAL RESISTANCES
PACKAGE
TO-92
SOIC
SOT-23
SOT-89
θ
JA
160
o
C/W
175
o
C/W
575
o
C/W
110
o
C/W
θ
JC
80
o
C/W
45
o
C/W
150
o
C/W
8
o
C/W
TYPICAL DERATING
6.3mW/
o
C
5.7mW/
o
C
1.7mW/
o
C
9.1mW/
o
C
FUNCTIONAL BLOCK DIAGRAM
CATHODE (K)
REFERENCE (R)
+
–
+
–
1.25V
ANODE (A)
1J-23
CALOGIC CORPORATION,
237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CL432
CORPORATION
ELECTRICAL CHARACTERISTICS
Electrical characteristics are guaranteed over full junction temperature range (0 to 105
o
C). Ambient temperature must be derated based on
power dissipation and package thermal characteristics. The conditions are: V
KA
= V
REF
and I
K
= 10mA unless otherwise stated.
SYMBOL
V
REF
V
REF
V
REF
V
REF
I
REF
I
REF
I
K(MIN)
I
K(MIN)
PARAMETER
Output Voltage
Line Regulation
Load Regulation
Temperature Deviation
Reference Input Current
Reference Input Current Temperature
Coefficient
Min. Cathode Current for Regulation
Off State Leakage
MIN
1.244
TYP
1.250
10
3
2
3
0.3
0.6
0.04
MAX
1.256
15
6
6
6
0.6
1
500
UNIT
V
mV
mV
mV
µA
µA
mA
nA
V
REF
= 0V, V
KA
= 18V
0 < T
J
< 105
o
C
TEST CONDITION
I
K
= 10mA, T
J
= 25
o
C, V
K
= V
REF
V
K
= 1.25 to 15V
I
K
= 1 to 100mA
0 < T
J
< 105
o
C
*Temperature deviation is defined as the maximum deviation of the reference over the given temperature range and does not imply an
incremental deviation at any given temperature.
TYPICAL PERFORMANCE CURVES
(Not available at time of publishing)
Calogic reserves the right to make changes without further notice to any products described herein to improve reliability, function,
or design. Calogic does not assume any liability arising out of the application or use of any product or circuit described herein;
neither does it convey any license under its patent rights or the right of others. Calogic products are not authorized for use as
components in life support devices or systems intended for surgical implant into the body or intended to support or sustain life.
Buyer agrees to notify Calogic of any such intended end use whereupon Calogic will determine availability and suitability of its
products for the intended use. Calogic and the Calogic logo are trademarks of Calogic.
CALOGIC CORPORATION,
237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CL432
CORPORATION
Information furnished by Calogic is believed to be accurate and reliable. However, no responsibility is assumed for its use: nor for any infringement of patents or other
rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent rights of Calogic.
CALOGIC CORPORATION,
237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CL432
CORPORATION
TYPICAL PERFORMANCE CURVES
900
I
K
– CATHODE CURRENT (µA)
800
700
600
500
400
300
200
100
0
–100
LOW CURRENT OPERATING
CHARACTERISTICS
V
KA
= V
REF
TEMPERATURE RANGE: –55 to 125˚C
150
I
K
– CATHODE CURRENT (mA)
125
100
75
50
25
0
–25
–50
–75
HIGH CURRENT OPERATING
CHARACTERISTICS
V
KA
= V
REF
TEMPERATURE RANGE: –55 to 125˚C
125˚C
25˚C
–55˚C
–200
–1.0
0
1.0
2.0
3.0
V
KA
– CATHODE VOLTAGE (V)
1G-41
–100
–2
–1
0
1
2
V
KA
– CATHODE VOLTAGE (V)
3
1G-42
100
I
Z
off – OFF STATE CATHODE
CURRENT (nA)
OFF STATE LEAKAGE
V
REF
– REFERENCE VOLTAGE (V)
V
KA
= 36V
V
REF
= 0V
2.54
TEMPERATURE COEFFICIENT AS
A FUNCTION OF TRIM VALUE
V
KA
= V
REF
2.53
I
K
= 10mA
2.52
2.51
10
1
2.50
2.49
2.48
2.47
2.46
–60
–30
0
30
60
90 120
T
A
– AMBIENT TEMPERATURE
V
REF
= 2.503V AT 25˚C
0.1
0.01
0
30
60
90 120
–60 –30
T
A
– AMBIENT TEMPERATURE (˚C)
1G-43
1G-44
3.0
I
REF
– REFERENCE INPUT
CURRENT (µA)
REFERENCE
INPUT CURRENT
V
REF
– CHANGE IN REFERENCE
VOLTAGE (mV)
R1 = 10kΩ
R2 =
∞
2.5 I
K
= 10mA
2.0
1.5
1.0
0.5
0
0
30
60
90 120
–60 –30
T
A
– AMBIENT TEMPERATURE (˚C)
0
REFERENCE VOLTAGE
LINE REGULATION
–10
–55˚C
0˚C
–20
25˚C
75˚C
125˚C
–30
–40
I
K
= 10mA
–50
TEMPERATURE RANGE: –55 to 125˚C
0
1G-45
3 6 9 12 15 18 21 24 27 30
V
KA
– CATHODE VOLTAGE (V)
1G-46
CALOGIC CORPORATION,
237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
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