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CORPORATION
1.25VPrecision Adjustable
Shunt Reference / Amplifier
Preliminary Product Information
CL432B
FEATURES
Temperature-Compensated: 50ppm/oC
Trimmed 2% Bandgap Reference
Internal Amplifier with 150mA Capability
Nominal Temperature Range Extended to 105oC
Low Frequency Dynamic Output Impedance: < 150m
Low Output Noise
PIN CONFIGURATION (Top View)
TO-92 (LP)
CATHODE
ANODE
REFERENCE
1G-33
ANODE
SOT-23 (VS)
CATHODE
REFERENCE
1J-22
DESCRIPTION
Calogic’s CL432B is a 3-terminal Adjustable Shunt Regulator
highly accurate 1.25V bandgap reference with a 2%
tolerance. The device offers thermal stability, wide operating
current (100mA) and an extended temperature range of 0o to
105oC for operation in power supply applications. The CL432B
offers a wide operating voltage range of up to 10V 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
CL432BLP
CL432BD
CL432BVS
CL432BS
Package
Temperature Range
TO-92
8-Pin Plastic SOIC
SOT-23
SOT-89
0 to 105oC
0 to 105oC
0 to 105oC
0 to 105oC
CATHODE 1
ANODE 2
ANODE 3
N/C 4
SOIC (D)
8 REFERENCE
7 ANODE
6 ANODE
5 N/C
1G-34
SOT-89 (S)
CATHODE
ANODE
REFERENCE
1G-35
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025

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CL432B
CORPORATION
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
VKA Cathode-Anode Reverse Breakdown
IAK Anode-Cathode Forward Current
IKA Operating Cathode Current
IREF Reference Input Current
PD Continuous Power at 25oC
TO-92
8L SOIC
SOT-23
SOT-89
TJ Junction Temperature
TSTG
Storage Temperature
TL Lead Temperature, Soldering 10 Seconds
RATING
10
1
100
1
775
750
1000
200
150
–65 to 150
300
UNITS
V
A
mA
mA
mW
mW
mW
mW
oC
oC
oC
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
PARAMETER
VKA Cathode Voltage
IK Cathode Current
RATING
VREF to 10
10
UNIT
V
mA
FUNCTIONAL BLOCK DIAGRAM
TYPICAL THERMAL RESISTANCES
PACKAGE
TO-92
SOIC
SOT-23
SOT-89
θJA
160oC/W
175oC/W
575oC/W
110oC/W
θJC
80oC/W
45oC/W
150oC/W
8oC/W
TYPICAL DERATING
6.3mW/oC
5.7mW/oC
1.7mW/oC
9.1mW/oC
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

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CORPORATION
CL432B
ELECTRICAL CHARACTERISTICS
Electrical characteristics are guaranteed over full junction temperature range (0 to 105oC). Ambient temperature must be derated based on
power dissipation and package thermal characteristics. The conditions are: VKA = VREF and IK = 10mA unless otherwise stated.
SYMBOL
PARAMETER
MIN TYP MAX UNIT
TEST CONDITION
VREF
Output Voltage
1.225
1.250
1.275
V IK = 10mA, TJ = 25oC, VK = VREF
VREF
Line Regulation
10 15 mV VK = 1.25 to 10V
VREF
VREF
Load Regulation
Temperature Deviation
3 6 mV IK = 1 to 100mA
2 6 mV 0 < TJ < 105oC
IREF Reference Input Current
3 6 µA
I REF
Reference Input Current Temperature
Coefficient
0.3 0.6 µA 0 < TJ < 105oC
IK(MIN)
Min. Cathode Current for Regulation
0.6 1 mA
IK(MIN)
Off State Leakage
0.04
500 nA VREF = 0V, VKA = 10V
*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)
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