L432M3A Niko Semiconductor Co., Ltd., L432M3A Datasheet

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L432M3A

Manufacturer Part Number
L432M3A
Description
1.24 V Low-Voltage Adjustable Precision Shunt Regulator
Manufacturer
Niko Semiconductor Co., Ltd.
Datasheet
NIKO-SEM
GENERAL DESCRIPTION
The L432 is a three-terminal adjustable shunt
regulator utilizing an accurate 1.24V band gap
reference. The output voltage can be set to any
value between 1.24V (V
external resistors as shown in the typical
application circuit. The device exhibit a wide
operating current range of 0.2 to 100 mA with a
typical dynamic impedance of 0.25Ω. Active
output circuitry provides a very sharp turn-on
characteristic, making the L432 excellent re-
placements for low-voltage zener diodes in
many applications, including on-board regulat-
ion and adjustable power supplies.
When used with an opto-coupler, the L432 is
ideal voltage reference in isolated feedback
circuits for 3.3V switching-mode power supplies.
The L432 shunt regulator is available in two
voltage tolerances (0.5% & 1.0%) and three
package options (TO-92, SOT-23-3 and SO-8).
SYMBOL & BLOCK DIAGRAM
Reference (R)
SYMBOL
Cathode (K)
Anode (A)
REF
1.24V Low-Voltage Adjustable
) to 18V with two
Precision Shunt Regulator
Reference
(R)
FUNCTIONAL BLOCK DIAGRAM
1
1.24 Vref
FEATURES
APPLICATIONS
Internal amplifier with 100 mA capability
Programmable output voltage to 18V
0.25Ω typical output impedance
Pin to pin compatible with TLV431A,
TS431, SC431L & AS432
Trimmed bandgap design 0.5% & 1.0%
with three package options
Low output noise
Linear regulator controller
Precision voltage reference
Switching power supplies
Battery operating equipment
Instrumentation
PCs, Computer disk drives
+
-
Anode (A)
Cathod
(K)
NOV-21-2001
L432

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L432M3A Summary of contents

Page 1

NIKO-SEM GENERAL DESCRIPTION The L432 is a three-terminal adjustable shunt regulator utilizing an accurate 1.24V band gap reference. The output voltage can be set to any value between 1.24V (V REF external resistors as shown in the typical application circuit. ...

Page 2

NIKO-SEM ABSOLUTE MAXIMUM RATINGS Cathode-Anode Reverse Breakdown Voltage - V Anode-Cathode Forward Current - I Operating Cathode Current - I Reference Input Current - I Storage Temperature Range - T Junction Temperature - T J Lead Temperature (Soldering, 10 Seconds) ...

Page 3

NIKO-SEM TEST CIRCUITS REF - TEST CIRCUIT REF Applications Information – Stability Selection of load capacitance when using L432 as a shunt regulator When the L432 is used ...

Page 4

NIKO-SEM Small-Signal Gain and Phase Shift VS. Frequency Stability Boundary Condition For Shunt Regulation VS. Cathode Current and Load Capacitance Cathode Current VS. Cathode Voltage 1.24V Low-Voltage Adjustable Precision Shunt Regulator Test Circuit for Small Signal Gain and Phase 4 ...

Page 5

NIKO-SEM Reference Voltage VS. Junction Temperature Ratio of Delta Reference Voltage to Delta Cathode Voltage VS. Junction Temperature Δ 16V to Vref 1.24V Low-Voltage Adjustable Precision Shunt Regulator 5 L432 Reference Impedance VS. Frequency Reference Input Current VS. ...

Page 6

NIKO-SEM Off-State Cathode Current VS. Junction Temperature PIN CONFIGURATIONS 1.24V Low-Voltage Adjustable Precision Shunt Regulator 6 L432 Reference Impedance VS. Junction Temperature NOV-21-2001 ...

Page 7

... NIKO-SEM DEVICE SELECTION GUIDE Device Package Marking Tolerance APPLICATION CIRCUIT Vin 5V or 12V 1.24V Low-Voltage Adjustable Precision Shunt Regulator L432NA L432M3A TO-92 SOT-23-3 L432NA 2M3A 0.5% 0.5% P01N02LM or P3055L Niko Cin 10uF A L431 or L432 Niko R1 Vout = ( Vref R2 7 L432VA L432M5A SOIC-8 ...

Page 8

NIKO-SEM Dimension Min. Typ. A 4.445 B 4.318 C 12.7 D 0.356 E 1.143 1.27 F 3.175 G 0.762 1.24V Low-Voltage Adjustable Precision Shunt Regulator TO-92 MECHANICAL DATA mm Dimension Max. 5.207 H 5.334 I 15.5 J 0.533 K 1.397 ...

Page 9

NIKO-SEM SOT-23 (M3) MECHANICAL DATA Dimension Min. A 0.95 B 2.60 2.80 C 1.40 1.60 D 2.70 2.90 E 1.00 1.10 F 0.00 G 0.35 1.24V Low-Voltage Adjustable Precision Shunt Regulator mm Dimension Typ. Max. H 3.00 I 1.80 J ...

Page 10

NIKO-SEM SOIC-8 (D) MECHANICAL DATA Dimension Min. Typ. A 4.8 B 3.8 C 5.8 D 0. 0.1 1.24V Low-Voltage Adjustable Precision Shunt Regulator mm Dimension Max. 5.0 H 4.0 I 6 1.65 ...

Page 11

NIKO-SEM SOT-23 (M5) MECHANICAL DATA Dimension Min. A 1.0 A1 0.00 A2 0.70 b 0.35 C 0.10 D 2.70 E 1.40 1.24V Low-Voltage Adjustable Precision Shunt Regulator mm Dimension Typ. Max. 1.10 1.30 e 0.10 H 0.80 0.90 L 0.40 ...

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