ULE4275 Datasheet | Unisonic Technologies

UNISONIC TECHNOLOGIES CO., LTD 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 VOUT = 5V (typical). The device can drive loads up to 450m A. 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, VOUT,rt, of 4.65V (typical). By the use of an external delay capacitor, one can program the reset delay time. The input capacitor, CIN, pensates for line fluctuation. Using a resistor of approximately 1Ω in series with CIN dampens the oscillation of input inductance and input capacitance. The output capacitor, COUT, stabilizes the regulation circuit. The specification for stability is at COUT ≥ 22μF and ESR ≤ 5Ω, within the operating temperature range. Stability for electrolytic capacitors specifically is at COUT ≥ 68µF within the operating temperature range. The control amplifier pares 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...