TLE4275-Q1 Datasheet | Texas Instruments

Product Folder Sample & Buy Technical Documents Tools & Software Support & munity SLVS647I - AUGUST 2006 - REVISED NOVEMBER 2014 TLE4275-Q1 5-V Low-Dropout Voltage Regulator 1 Features - 1 Qualified for Automotive Applications - Output Voltage 5 V ± 2% - Very Low Current Consumption - Power-On and Undervoltage Reset - Reset Low-Level Output Voltage < 1 V - Very Low Dropout Voltage - Short-Circuit Proof - Reverse-Polarity Proof 2 Applications - Qualified for Automotive Applications - Cluster - Body Control Modules - Heating Ventilation and Air Conditioning (HVAC) 3 Description The TLE4275-Q1 is a monolithic integrated lowdropout voltage regulator offered in a 5-pin TO package. The device regulates an input voltage up to 45 V to VOUT = 5 V (typical). The device can drive loads up to 450 m A and is short-circuit proof. At overtemperature, the incorporated temperature protection turns off the TLE4275-Q1. The device generates a reset signal for an output voltage, VOUT,rt, of 4.65 V (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 1 Ω 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 ≥ 22 μF and ESR ≤ 5 Ω, within the operating temperature range. Stability for electrolytic capacitors specifically is at COUT ≥ 68 µF within the operating temperature range. See the application report on low-temperature stability, SLVA501, for further details. 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...