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TPS743xx
TPS743xx
500mV/div
Time(20ms/div)
V
PG
V
TRACK
I =500mA
OUT
V
OUT
R
1
R
5
R
3
R
4
R
2
V
OUT
C
OUT
Optional
PG
OUT
FB
IN
BIAS
TRACK
GND
V
IN
V
BIAS
C
IN
C
BIAS
V
TRACK
V
PG
TPS74301
EN
ADJUSTABLEVOLTAGEVERSION
R
5
R
3
R
4
V
OUT
C
OUT
Optional
PG
OUT
SNS
IN
BIAS
TRACK
GND
V
IN
V
BIAS
C
IN
C
BIAS
V
TRACK
V
PG
TPS743xx
EN
FIXEDVOLTAGEVERSION
TPS743xx
www.ti.com
SBVS065K –DECEMBER 2005–REVISED AUGUST 2010
1.5A Ultra-LDO with Programmable Sequencing
Check for Samples: TPS743xx
1
FEATURES
DESCRIPTION
2
• Track Pin Allows for Flexible Power-Up
The TPS743xx low-dropout (LDO) linear regulators
Sequencing
provide an easy-to-use robust power management
• 1% Accuracy Over Line, Load, and
solution for a wide variety of applications. The
Temperature
TRACK pin allows the output to track an external
• Supports Input Voltages as Low as 0.9V with
supply. This feature is useful in minimizing the stress
External Bias Supply
on ESD structures that are present between the
CORE and I/O power pins of many processors. The
• Adjustable Output (0.8V to 3.6V)
enable input and power-good output allow easy
• Fixed Output (0.9V to 3.6V)
sequencing with external regulators. This complete
• Ultra-Low Dropout: 55mV at 1.5A (typ)
flexibility allows the user to configure a solution that
meets the sequencing requirements of FPGAs,
• Stable with Any or No Output Capacitor
DSPs, and other applications with special start-up
• Excellent Transient Response
requirements.
• Available in 5mm × 5mm × 1mm QFN and
A precision reference and error amplifier deliver 1%
DDPAK-7 Packages
accuracy over load, line, temperature, and process.
• Open-Drain Power-Good (5 × 5 QFN)
Each LDO is stable with low-cost ceramic output
• Active High Enable
capacitors and the family is fully specified from –40°C
to +125°C. The TPS743xx is offered in a small (5mm
× 5mm) QFN package, yielding a highly compact total
APPLICATIONS
solution size. For applications that require additional
• FPGA Applications
power dissipation, the DDPAK (KTW) package is also
• DSP Core and I/O Voltages
available.
• Post-Regulation Applications
• Applications with Special Start-Up Time or
Sequencing Requirements
Figure 1. Tracking Response
Figure 2. Typical Application Circuit
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.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2005–2010, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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