ULE4275L-TQ5-T Datasheet, PDF (1/6 Pages) Unisonic Technologies – LINEAR INTEGRATED CIRCUIT

UNISONIC TECHNOLOGIES CO., LTD
ULE4275
Preliminary
LINEAR INTEGRATED CIRCUIT
5-V LOW-DROPOUT VOLTAGE
REGULATOR
 DESCRIPTION
The UTC ULE4275 is a monolithic integrated low-dropout
voltage regulator. The device regulates an input voltage up to
45V to V_OUT = 5V (typical). The device can drive loads up to
450mA. It also provides overcurrent protection and
overtemperature protection for control of the state of the output
voltage. The device generates a reset signal for an output
voltage, V_OUT,rt, of 4.65V (typical). By the use of an external delay
capacitor, one can program the reset delay time.
The input capacitor, C_IN, compensates for line fluctuation.
Using a resistor of approximately 1Ω in series with C_IN dampens
the oscillation of input inductance and input capacitance. The
output capacitor, C_OUT, stabilizes the regulation circuit. The
specification for stability is at C_OUT ≥ 22μF and ESR ≤ 5Ω, within
the operating temperature range. Stability for electrolytic capacitors specifically is at C_OUT ≥ 68µF within the
operating temperature range.
The control amplifier compares a reference voltage to a voltage that is proportional to the output voltage and
drives the base of the series transistor through a buffer. Saturation control as a function of the load current prevents
any oversaturation of the power element. The device also incorporates a number of internal circuits for protection
against: overload, overtemperature, and reverse polarity.
 FEATURES
* Qualified for Automotive Applications
* Output Voltage 5V ± 2%
* Very Low Current Consumption
* Power-On and Undervoltage Reset
* Reset Low-Level Output Voltage<1V
* Very Low Dropout Voltage
* Internal Short-Circuit Current Limiting
* Reverse-Polarity Proof
 ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
ULE4275L-TQ5-T
ULE4275G-TQ5-T
ULE4275L-TQ5-R
ULE4275G-TQ5-R
Package
TO-263-5
TO-263-5
Packing
Tube
Tape Reel
ULE4275L-TQ5-T
(1)Packing Type
(2)Package Type
(3)Green Package
(1) T: Tube, R: Tape Reel
(2) TQ5: TO-263-5
(3) L: Lead Free, G: Halogen Free and Lead Free
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