TPS767D301 Datasheet, PDF (1/22 Pages) Texas Instruments – DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS

TPS767D3xx
www.ti.com......................................................................................................................................................... SLVS209H – JULY 1999 – REVISED AUGUST 2008
DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS
FEATURES
1
•23 Dual Output Voltages for Split-Supply
Applications
• Output Current Range of 0mA to 1.0A per
Regulator
• 3.3V/2.5V, 3.3V/1.8V, and 3.3V/Adjustable
Output
• Fast-Transient Response
• 2% Tolerance Over Load and Temperature
• Dropout Voltage Typically 350mV at 1A
• Ultra-low 85µA Typical Quiescent Current
• 1µA Quiescent Current During Shutdown
• Dual Open-Drain Power-On Reset with 200ms
Delay for Each Regulator
• 28-Pin PowerPAD™ TSSOP Package
• Thermal Shutdown Protection for Each
Regulator
DESCRIPTION
The TPS767D3xx family of dual voltage regulators
offers fast transient response, low dropout voltages
and dual outputs in a compact package and
incorporating stability with 10µF low ESR output
capacitors.
The TPS767D3xx family of dual voltage regulators is
designed primarily for DSP applications. These
devices can be used in any mixed-output voltage
application, with each regulator supporting up to 1A.
Dual active-low reset signals allow resetting of
core-logic and I/O separately.
Because the PMOS device behaves as a low-value
resistor, the dropout voltage is very low (350mV
typically at an output current of 1A for the
TPS767D325) 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 1A). 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 T_J = +25°C.
The RESET output of the TPS767D3xx initiates a
reset in microcomputer and microprocessor systems
in the event of an undervoltage condition. An internal
comparator in the TPS767D3xx monitors the output
voltage of the regulator to detect an undervoltage
condition on the regulated output voltage.
The TPS767D3xx is offered in 1.8V, 2.5V, and 3.3V
fixed-voltage versions and in an adjustable version
(programmable over the range of 1.5V to 5.5V).
Output voltage tolerance is specified as a maximum
of 2% over line, load, and temperature ranges. The
TPS767D3xx family is available in a 28-pin PWP
TSSOP package. They operate over a junction
temperature range of –40°C to +125°C.
LINE TRANSIENT RESPONSE
V_OUT = 3.3V
C_L = 10mF
5.3 ^TA ^{= 25°C}
4.3
10
0
-10
0 20 40 60 80 100 120 140 160 180 200
t - Time - ms
DROPOUT VOLTAGE
vs FREE-AIR TEMPERATURE
3
10
10²
I_OUT = 1A
10¹
I_OUT = 10mA
10
10^-1
-2
V_OUT = 3.3V
C_OUT = 10mF
I_OUT = 0
10
-60 -40 -20 0 20 40 60 80 100 120 140
T_A - Free-Air Temperature - °C
PWP PACKAGE
(TOP VIEW)
NC 1
NC 2
1GND 3
1EN 4
1IN 5
1IN 6
NC 7
NC 8
2GND 9
2EN 10
2IN 11
2IN 12
NC 13
NC 14
28 1RESET
27 NC
26 NC
25 1FB/NC
24 1OUT
23 1OUT
22 2RESET
21 NC
20 NC
19 NC
18 2OUT
17 2OUT
16 NC
15 NC
NC = No internal connection
1
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.
2
All other trademarks are the property of their respective owners.
3
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 © 1999–2008, Texas Instruments Incorporated