Q67006-A9095 SIEMENS [Siemens Semiconductor Group], Q67006-A9095 Datasheet - Page 4

• Manufacturer Part Number: Q67006-A9095
• Description: 5-V Low-Drop Voltage Regulator
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Semiconductor Group
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. If the voltage on the capacitor reaches
the lower threshold
again until the upper threshold
to GND, reset is triggered at an output voltage of 4.5 V. A connected microcontroller is
controlled by the watchdog logic. If pulses are missing, the reset output is set to low. The
pulse sequence time can be set within 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:
Block Diagram
Overload
Overtemperature
Reverse polarity
Input
18
Adjustment
Temperature
V
Sensor
Reference
Bandgap
ST
, a reset signal is issued on the reset output and not cancelled
V
Amplifier
Control
dT
is exceeded. If the reset threshold input is connected
4
Buffer
Inhibit
20
Control and
Saturation
Protection
Circuit
GND
4-7, 14-17
Generator
Watchdog
Reset
11
12
10
9
3
TLE 4263
1998-11-01
Output
Reset
Delay
Reset
Output
Reset
Threshold
AEB01100