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PDF ZR431L Data sheet ( Hoja de datos )
| Número de pieza | ZR431L | |
| Descripción | ADJUSTABLE PRECISION ZENER SHUNT REGULATOR | |
| Fabricantes | Zetex Semiconductors | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ZR431L (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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ADJUSTABLE PRECISION
ZENER SHUNT REGULATOR
Issue 1 - NOVEMBER 1998
DEVICE DESCRIPTION
The ZR431L is a three terminal adjustable
shunt regulator offering excellent
temperature stability and output current
handling capability up to 25mA. The output
voltage may be set to any chosen voltage
between 1.24 and 10 volts by selection of
two external divider resistors.
The devices can be used as a replacement
for zener diodes in many applications
requiring an improvement in zener
performance.
The ZR431L is particularly used in the
feedback control loop of switch mode power
supplies. In this application the device 1.24
volt reference enables the generation of low
voltage supplies, typically 3.3 volts or 3 volts.
SCHEMATIC DIAGRAM
Vref
ZR431L
FEATURES
• Surface mount SOT23 package
• TO92 package
• 2.5% and 1% tolerance
• Maximum temperature coefficient 50
ppm/°C
• Temperature compensated for
operation over the full temperature
range
• Programmable output voltage
• 100µA to 25mA current sink capability
• Low output noise
APPLICATIONS
• Shunt regulator
• Series regulator
• Voltage monitor
• Over voltage/ under voltage protection
• Switch mode power supplies
VZ
Gnd
1 page  
DC TEST CIRCUITS
ZR431L
Input
IL
VZ
IZ
IHAB
47nF
Vref
Input
IL
R1
IHAB
R2 Vref
VZ Input
IZ
47nF
VZ
I zoff
47nF
Fig 1 – Test Circuit for Vz=Vref
Fig 2 – Test Circuit for Vz>Vref
Fig 3 – Test Circuit for Off
State current
1-42
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet ZR431L.PDF ] | |
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| Número de pieza | Descripción | Fabricantes |
| ZR431 | ADJUSTABLE PRECISION ZENER SHUNT REGULATOR | Zetex Semiconductors |
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