描述 Description

This device is designed to have a fast transient response and be stable with 10-μF low ESR capacitors. This combination provides high performance at a reasonable cost.
Because 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, since 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 sleep 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.
The TPS768xx is offered in 1.5-V, 1.8-V, 2.5-V, 2.7-V, 2.8-V, 3.0-V, 3.3-V, and 5.0-V fixed-voltage versions and in an adjustable version (programmable over the range of 1.2 V to 5.5 V). Output voltage tolerance is specified as a maximum of 2% over line, load, and temperature ranges. The TPS768xx family is available in a 20-pin PWP package.

特性 Features

? 1-A Low-Dropout Voltage Regulator
? 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 Versions
? Dropout Voltage Down to 230 mV at 1 A (TPS76850)
? Ultralow 85-μA Typical Quiescent Current
? Fast Transient Response
? 2% Tolerance Over Specified Conditions for Fixed-Output Versions
? Open Drain Power Good (See TPS767xx for Power-On Reset With 200-ms Delay Option)
? 20-Pin TSSOP (PWP) PowerPAD? Package
? Thermal Shutdown Protection
? SUPPORTS DEFENSE, AEROSPACE AND MEDICAL APPLICATION
- Controlled Baseline
? One Assembly/Test Site
? One Fabrication Site
? Available in Military (?55°C/125°C) Temperature Range
? Extended Product LIfe Cycle
? Extended Product-Change Notification
? Product Traceability
Additional temperature ranges are available - contact factory. PowerPAD is a trademark of Texas Instruments.