ILE4270 Datasheet, PDF (1/8 Pages) IK Semicon Co., Ltd – 5-V Low-Drop Fixed Voltage Regulator

TECHNICAL DATA
5-V Low-Drop Fixed Voltage Regulator
ILE4270
Functional Description
This device is a 5-V low-drop fixed-voltage regulator.
The maximum input voltage is 42 V (65 V, ≤400 ms). Up to an
input voltage of 26 V and for an output current up to 550 mA it
regulates the output voltage within a 2 % accuracy. The short
circuit protection limits the output current of more than 650 mA.
The device incorporates over voltage protection and
temperature protection that disables the circuit at
unpermissibly high temperatures.
ILE4270G
ILE4270S
Features
• Output voltage tolerance ≤ ± 2 %
• Low-drop voltage
• Integrated overtemperature protection
• Reverse polarity protection
• Input voltage up to 42 V
• Overvoltage protection up to 65 V (≤ 400 ms)
• Short-circuit proof
• Suitable for use in automotive electronics
• Wide temperature range
• Adjustable reset time
• ESD protection > 4000 V
ILE 4270G P-ТО263-5-1
ILE 4270S P-TO220-5-12
T_A = -40° ÷ 125° C for all
packages.
Application Description
The IC regulates an input voltage in the range of 5.5 V < VI < 36 V to VQnom = 5.0 V. Up
to 26 V it produces a regulated output current of more than 550 mA. Above 26 V the save-
operating-area protection allows operation up to 36 V with a regulated output current of
more than 300 mA. Overvoltage protection limits operation at 42 V. The overvoltage
protection hysteresis restores operation if the input voltage has dropped below 36 V. A
reset signal is generated for an output voltage of VQ < 4.5 V. The delay for power-on reset
can be set externally with a capacitor.
Design Notes for External Components
An input capacitor CI is necessary for compensation of line influences. The resonant circuit
consisting of lead inductance and input capacitance can be damped by a resistor of
approx. 1 Ω in series with CI. An output capacitor CQ is necessary for the stability of the
regulating circuit. Stability is guaranteed at values of CQ ≥ 22 µF and an ESR of < 3 Ω.
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