TLE 4263GS Infineon Technologies, TLE 4263GS Datasheet - Page 4

• Manufacturer Part Number: TLE 4263GS
• Manufacturer: Infineon Technologies

Specifications of TLE 4263GS

• Packages: PG-DSO-8
• Regulator Type: single output
• Output Voltage: 5V
• Accuracy: 2.0 %
• Max. Output Current: 150mA
• Dropout Voltage: 350mV

Circuit Description
The control amplifier compares a reference voltage, which is kept highly accurate by
resistance adjustment, to a voltage that is proportional to the output voltage and drives
the base of the series transistor via a buffer. Saturation control as a function of the load
current prevents any over-saturation of the power element. If the externally scaled down
output voltage at the reset threshold input drops below 1.35 V, the external reset delay
capacitor is discharged by the reset generator. When the voltage of the capacitor
reaches the lower threshold
until the upper threshold
GND, reset is triggered at an output voltage of typ. 4.65 V. A connected microcontroller
will be monitored through the watchdog logic. In case of missing pulses at pin W, the
reset output is set to low. The pulse sequence time can be set in a wide range with the
reset delay capacitor. The IC can be switched at the TTL-compatible, low-active inhibit
input. The IC also incorporates a number of internal circuits for protection against:
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Figure 2
Data Sheet
Input
Overload
Overtemperature
Reverse polarity
Adjustment
Block Diagram
Temperature
Sensor
Reference
Bandgap
V
DU
V
Amplifier
Control
is exceeded. If the reset threshold input is connected to
DRL
, a reset signal occurs at the reset output and is held
Buffer
Inhibit
4
INH
Control and
Saturation
Protection
Circuit
GND
GND
Watchdog
Generator
Reset
W
Rev. 2.8, 2007-03-20
AEB03068
RADJ
RO
Q
D
TLE 4263
Output
Reset
Delay
Reset
Output
Reset
Threshold