TPS78833

TPS78825, TPS78833 SLVS382A – JUNE 2001 – REVISED JULY 2001 150-mA LOW-NOISE LDO WITH IN-RUSH CURRENT CONTROL FOR USB APPLICATION FEATURES D 150-mA Low-Dropout Regulator D Available in 2.5 V, 3.3 V D Programmable Slew Rate Control D Output Noise Typically 56 µVRMS D Only 17 µA Quiescent Current at 150 mA D 1 µA Quiescent Current in Standby Mode D Dropout Voltage Typically 150 mV at 150 mA (TPS78833) D Over Current Limitation D –40°C to 125°C Operating Junction Temperature Range D 5-Pin SOT-23 (DBV) Package DBV PACKAGE (TOP VIEW) IN 1 5 OUT GND 2 EN 3 4 SR DESCRIPTION The TPS78825 and TPS78833 are very small (SOT-23) package, low-noise LDOs that regulate the output voltage to 2.5 V and 3.3 V with input voltage ranging from 2.7 V to an absolute maximum of 13.5 V. These devices output 150 mA with a peak current of 350 mA (typ). The TPS788xx family uses the SR pin to program the output voltage slew rate to control the in-rush current. This is specifically used in the USB application where large load capacitance is present at start-up. The TPS788xx devices use only 17 µA of quiescent current and exhibit only 56 µVRMS of output voltage noise using a 10 µF output capacitor. The usual PNP pass transistor has been replaced by a PMOS pass element. Because the PMOS pass element behaves as a low-value resistor, the dropout voltage is very low, typically 150 mV at 150 mA of load current, and is directly proportional to the load current. The TPS788xx also features a logic-enabled sl...