描述 Description

This device is designed to have a fast transient response and be stable with 10 μF capacitors. This combination provides high performance at a reasonable cost. Since the PMOS device behaves as a low-value resistor, the dropout voltage is very low (typically 230 mV at an output current of 1 A for the TPS76850) and is directly proportional to the output current. Additionally, because the PMOS pass element is a voltage-driven device, the quiescent current is very low and independent of output loading (typically 85 μA over the full range of output current, 0 mA to 1 A). These two key specifications yield a significant improvement in operating life for battery-powered systems. This LDO family also features a shutdown mode; applying a TTL high signal to EN (enable) shuts down the regulator, reducing the quiescent current to less than 1 μA at TJ = 25°C. Power good (PG) is an active high output, which can be used to implement a power-on reset or a low-battery indicator.

特性 Features

? Input Voltage Range: 2.7 V to 10 V
? Low-Dropout Voltage: 230 mV typical at 1 A (TPS76850)
? 2% Tolerance Over Specified Conditions for Fixed-Output Versions
? Open Drain Power Good (See TPS767xx for Power-On Reset With 200-ms Delay Option)
? Ultralow 85 μA Typical Quiescent Current
? Available in 1.5-V, 1.8-V, 2.5-V, 2.7-V, 2.8-V, 3.0-V, 3.3-V, 5.0-V Fixed Output and Adjustable (1.2 V to 5.5 V) Versions
? Fast Transient Response
? Thermal Shutdown Protection
? SOIC-8 (D) and TSSOP-20 (PWP) Package