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
DESCRIPTION
1
• 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
23
APPLICATIONS
•
•
Typical Application Circuit
(Fixed Voltage Options)
6
7
RESET/
PG
IN
5
RESET/PG
Power good (PG) of the TPS776xx is an active high
output, which can be used to implement a power-on
reset or a low-battery indicator.
IN
OUT
0.1mF
16
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 of an undervoltage condition. An internal
comparator in the TPS775xx monitors the output
voltage of the regulator to detect an undervoltage
condition on the regulated output voltage.
FPGA Power
DSP Core and I/O Voltages
VIN
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.
OUT
EN
14
VOUT
13
(1)
+
COUT
10mF
GND
3
The TPS775xx and TPS776xx are offered in 1.5V,
1.6V (TPS77516 only), 1.8V, 2.5V, 2.8V (TPS77628
only), and 3.3V fixed-voltage versions and in an
adjustable version (programmable over the range of
1.5V to 5.5V for the TPS77501 and 1.2V to 5.5V for
the TPS77601). Output voltage tolerance is specified
as a maximum of 2% over line, load, and temperature
ranges. The TPS775xx and TPS776xx families are
available in 8-pin SOIC and 20-pin TSSOP packages.
1
2
3
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1999–2009, Texas Instruments Incorporated
