TPS775xx, TPS776xx
www. ti. com. . SLVS232J – SEPTEMBER 1999 – REVISED MARCH 2009
TPS775xx with RESET Output, TPS776xx with PG Output FAST-TRANSIENT-RESPONSE 500mA LOW-DROPOUT VOLTAGE REGULATORS
FEATURES
1
•23 Open Drain Power-On Reset with 200ms Delay (TPS775xx)
• Open Drain Power Good (TPS776xx) • 500mA Low-Dropout Voltage Regulator • Available in Fixed Output and Adjustable
Versions • Dropout Voltage to 169mV (Typ) at 500mA
(TPS77x33) • Ultralow 85µA Typical Quiescent Current • Fast Transient Response • 2% Tolerance Over Specified Conditions for
Fixed-Output Versions • 8-Pin SOIC and 20-Pin TSSOP PowerPAD™
(PWP) Packages • Thermal Shutdown Protection
APPLICATIONS
• FPGA Power • DSP Core and I/O Voltages
Typical Application Circuit (Fixed Voltage Options)
VIN 0. 1mF
6 IN
7 IN
5 EN
RESET/ 16 PG
OUT 14 OUT 13
GND 3
RESET /PG
VOUT
(1)
COUT +
10mF
DESCRIPTION
The TPS775xx and TPS776xx devices are designed to have a fast transient response and be stable with a 10µF low ESR capacitor. 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 169mV at an output current of 500mA for the TPS77x33) 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 85µA over the full range of output current, 0mA to 500mA). 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 1µA at TJ = +25°C.
The RESET output of the TPS775xx initiates a reset in microcomputer and microprocessor systems in the event ...
TPS77618 PDF File
