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TLE4278G Datasheet(PDF) 13 Page - Siemens Semiconductor Group

Part # TLE4278G
Description  5-V Low-Drop Fixed Voltage Regulator
PDF  18 Pages
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Manufacturer  SIEMENS [Siemens Semiconductor Group]
Direct Link  http://www.siemens.com/
Logo SIEMENS - Siemens Semiconductor Group

TLE4278G Datasheet(HTML) 13 Page - Siemens Semiconductor Group

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TLE 4278 G
Semiconductor Group
13
1998-11-01
Watchdog Activating
The calculation of the external resistor which adjusts the watchdog switch off threshold
can be done by the following equation.
R
WADJ = VWADJ × (IQ/IWADJ)/IQACT
Definitions:
V
WADJ = switch off threshold, typical 1.35 V
I
Q/IWADJ = current ratio, typical 720
I
QACT = switch off load current
Figure 7
AES02552
Band-Gap-
Reference
V
Ι
GND
V
Q
+
-
TLE 4278 G
Watchdog
active
HIGH
disabled
Watchdog
LOW
WADJ
R WADJ



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