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參數(shù)資料
| 型號： | L432 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 1.24V Low-Voltage Adjustable Precision Shunt Regulator |
| 中文描述： | 兩種器件低電壓可調(diào)節(jié)精密并聯(lián)穩(wěn)壓器 |
| 文件頁數(shù)： | 1/11頁 |
| 文件大?。?/td> | 283K |
| 代理商： | L432 |
GENERAL DESCRIPTION
1
1.24V Low-Voltage Adjustable
Precision Shunt Regulator
NIKO-SEM
L432
NOV-21-2001
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
) to 18V with two
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 0.25
Ω
. 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).
FEATURES
z
Internal amplifier with 100 mA capability
z
Programmable output voltage to 18V
z
0.25
Ω
typical output impedance
z
Pin to pin compatible with TLV431A,
TS431, SC431L & AS432
z
Trimmed bandgap design 0.5% & 1.0%
with three package options
z
Low output noise
APPLICATIONS
z
Linear regulator controller
z
Precision voltage reference
z
Switching power supplies
z
Battery operating equipment
z
Instrumentation
z
PCs, Computer disk drives
SYMBOL & BLOCK DIAGRAM
Anode (A)
Cathod
(K)
Reference
(R)
-
+
Cathode (K)
Anode (A)
Reference (R)
1.24 Vref
FUNCTIONAL BLOCK DIAGRAM
SYMBOL
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