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PDF L431L Data sheet ( Hoja de datos )
| Número de pieza | L431L | |
| Descripción | 1.24V Low-Voltage Adjustable Precision Shunt Regulator | |
| Fabricantes | NIKO-SEM | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de L431L (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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NIKO-SEM
1.24V Low-Voltage Adjustable
Precision Shunt Regulator
L431L
GENERAL DESCRIPTION
The L431L 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 (VREF) 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 0.25Ω. Active
output circuitry provides a very sharp turn-on
characteristic, making the L431L 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 L431L is
ideal voltage reference in isolated feedback
circuits for 3.3V switching-mode power supplies.
The L431L 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 0.25Ω 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
Cathode (K)
Reference (R)
Anode (A)
SYMBOL
Reference
(R)
+
-
1.24 Vref
Cathod
(K)
Anode (A)
FUNCTIONAL BLOCK DIAGRAM
www.DataSheet4U.net
1
APR-25-2002
1 page  
NIKO-SEM
1.24V Low-Voltage Adjustable
Precision Shunt Regulator
L431L
Reference Voltage
VS. Junction Temperature
Reference Impedance
VS. Frequency
Ratio of Delta Reference Voltage to Delta Cathode Voltage
VS. Junction Temperature
ΔVz = 16V to Vref
Reference Input Current
VS. Junction Temperature
∞
5 APR-25-2002
5 Page 
NIKO-SEM
1.24V Low-Voltage Adjustable
Precision Shunt Regulator
L431L
SOT-23 (M5) MECHANICAL DATA
Dimension
A
A1
A2
b
C
D
E
Min.
1.0
0.00
0.70
0.35
0.10
2.70
1.40
mm
Typ.
1.10
0.80
0.40
0.15
2.90
1.60
Max.
1.30
0.10
0.90
0.50
0.25
3.10
1.80
Dimension
e
H
L
Min.
2.60
0.37
mm
Typ.
1.90(TYP)
2.80
Max.
3.00
11 APR-25-2002
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet L431L.PDF ] | |
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