TECHNICAL DATA
5-V Low-Drop Fixed Voltage Regulator
ILE4278
Features
• Output voltage tolerance ≤ ± 2%, 4%
• 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
PDSO-14
ORDERING INFORMATION
ILE4278D
• Short-circuit proof
• Suitable for use in automotive electronics
• Wide temperature range
• AEC-Q100 Qualified
• ESD Protection : HBM ±8,000V / MM ±400V / CDM ±2,000V
Functional Description
The ILE 4278 is a monolithic integrated low-drop fixed-voltage regulator which can
supply loads up to 200 mA. The device is available in the 14-SOP-225 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 over temperature. Of course the ILE 4278 can also be used in
other applications where a stabilized voltage is required.
An input voltage VI in the range of 6V ≤ VI ≤ 28V is regulated to VQ,nom = 5 V with an
accuracy of ± 2%.
An input voltage VI in the range of 28V ≤ VI ≤ 45 V is regulated to VQ,nom = 5 V with an
accuracy of ± 4%.
The device operates in the wide temperature range of Tj = – 40 to 12 5 ℃.
Two additional features are implemented in the ILE 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 to LOW. Programming of the max. repetition time can be done easily by an
external reset delay capacitor. To prevent a reset in case of missing pulses, the
watchdog output WO is separate from the reset output RO for the ILE 4278.
June, 2013, Rev. 02
IKSEMICON [ IK SEMICON CO., LTD ]
