TLE4287G_12 Datasheet, PDF (2/14 Pages) Infineon Technologies AG – Very low standby current consumption

5-V Voltage Regulator
TLE4287G
Features
• Output voltage tolerance ≤ ±2%
• Very low standby current consumption
• Input voltage up to 42 V
• Reset function down to 1 V output voltage
• Adjustable reset time
• On/Off logic
• Overtemperature protection
• Reverse polarity protection
• Short-circuit proof
• Very wide temperature range
• Very small output capacitor
• Green Product (RoHS compliant)
• AEC Qualified
Functional Description
The TLE4287G is a monolithic integrated 5 V voltage regulator in PG-DSO-14 package.
It supplies an output current I_Q > 250 mA. The IC is short circuit proof and incorporates
temperature protection which turns off the device at overtemperature.
The input voltage V_I is regulated in the range of 7.5 V < V_I < 40 V to V_Q,nom = 5 V.
Therefore a reference voltage, which is kept highly accurate by resistance adjustment,
is compared via a control amplifier to a voltage that is proportional to the output voltage.
The control amplifier drives the base of the series transistor by a buffer.
A comparator in the reset-generator block compares a reference voltage that is
independent of the input voltage to the scaled-down output voltage. In the case of an
output voltage V_Q < 4.5 V the reset delay capacitor is discharged and a reset signal is
generated by setting the reset output LOW. The reset delay time can be set by choosing
the external capacitor over a wide range. When the output voltage rises above V_Q ≥ 4.5 V
the reset delay capacitor is charged again. As soon as the delay capacitor voltage
reaches the upper switching threshold the reset output pin is set HIGH again.
Type
TLE4287G
Data Sheet
Package
PG-DSO-14
2
Rev. 1.41, 2012-01-30