TLE4278G Datasheet, PDF (1/19 Pages) Siemens Semiconductor Group – 5-V Low-Drop Fixed Voltage Regulator

5-V Low Drop Fixed Voltage Regulator
TLE 4278 G
Features
• Output voltage tolerance ≤ ±2%
• Very low current consumption
• Separated reset and watchdog output
• Low-drop voltage
• Watchdog
• Adjustable watchdog activating threshold
• Adjustable reset threshold
• Overtemperature protection
• Reverse polarity protection
• Short-circuit proof
• Suitable for use in automotive electronics
• Wide temperature range
P-DSO-14-3, -8, -9, -11, 14
Functional Description
The TLE 4278 is a monolithic integrated low-drop fixed output voltage regulator
supplying loads up to 200 mA. The IC is available in a P-DSO-14-8 package. It is
designed to supply microprocessor systems under the severe conditions of automotive
applications and therefore equipped with additional protection functions against over-
load, short circuit and overtemperature. The TLE 4278 can also be used in other
applications where a stabilized voltage is required.
An input voltage V_I in the range of 5.5 V ≤ V_I ≤ 45 V is regulated to V_Q,nom = 5 V with an
accuracy of ±2%.
The device operates in the wide temperature range of T_j = -40 to 150 °C.
Two additional features are implemented in the TLE 4278 a load dependent watchdog
function as well as a sophisticated reset function including power on reset, under voltage
reset, adjustable reset delay time and adjustable reset switching threshold.
The watchdog function monitors the microcontroller, including time base failures. In case
of a missing rising edge within a certain pulse repetition time the watchdog output is set
Type
TLE 4278 G
Data Sheet
Ordering Code
Q67007-A9291
1
Package
P-DSO-14-8
Rev. 1.3, 2005-04-29