ILE4264G_11 Datasheet, PDF (1/6 Pages) IK Semicon Co., Ltd – 5-V Low-Drop Fixed-Voltage Regulator

TECHNICAL DATA
5-V Low-Drop Fixed-Voltage Regulator
ILE4264G
ILE 4264 G is a 5-V low-drop fixed-voltage regulator
in an SOT-223 package. The IC regulates an input
voltage VI in the range 5.5V<VI<45V to
VQrated = 5.0V. The maximum output current is more
than 120 mA. This IC is shortcircuit-proof and features
temperature protection that disables the circuit at
overtemperature.
P-SOT223-4-1
Features:
• Output voltage tolerance ≤ ± 2 %
• Low-drop voltage
• Very low current consumption
• Overtemperature protection
• Short-circuit proof
• Suitable for use in automotive electronics
• Reverse polarity.
I L E 4264G
Dimensioning Information on External Components
The input capacitor Ci is necessary for compensating line influences. Using a resistor
of approx. 1 Ω in series with Ci, the oscillating of input inductivity and input capacitance
can be clamped. The output capacitor CQ is necessary for the stability of the regulating
circuit. Stability is guaranteed at values CQ ≥ 10µF and an ESR ≤ 10Ω within the
operating temperature range.
Pin Definitions and Functions
Pin
Symbol
Function
1
VI
Input voltage; block to
ground directly on IC with
ceramic capacitor
2, 4
GND
Ground
3
VQ
5-V output voltage; block
to ground with ≥ 10-µF Ω
capacitor, ESR < 10 Ω
Circuit Description
The control amplifier compares a reference voltage, which is kept highly precise 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, working as a function of load current, prevents any over-saturation of the power element.
The IC is additionally protected against overload, overtemperature and reverse polarity.
January, 2011, Rev. 01