TPS74301_15 Datasheet, PDF (1/28 Pages) Texas Instruments – 1.5A Ultra-LDO with Programmable Sequencing

TPS743xx
TPS743xx
www.ti.com
TPS743xx
SBVS065K – DECEMBER 2005 – REVISED AUGUST 2010
1.5A Ultra-LDO with Programmable Sequencing
Check for Samples: TPS743xx
FEATURES
1
•2 Track Pin Allows for Flexible Power-Up
Sequencing
• 1% Accuracy Over Line, Load, and
Temperature
• Supports Input Voltages as Low as 0.9V with
External Bias Supply
• Adjustable Output (0.8V to 3.6V)
• Fixed Output (0.9V to 3.6V)
• Ultra-Low Dropout: 55mV at 1.5A (typ)
• Stable with Any or No Output Capacitor
• Excellent Transient Response
• Available in 5mm × 5mm × 1mm QFN and
DDPAK-7 Packages
• Open-Drain Power-Good (5 × 5 QFN)
• Active High Enable
APPLICATIONS
• FPGA Applications
• DSP Core and I/O Voltages
• Post-Regulation Applications
• Applications with Special Start-Up Time or
Sequencing Requirements
V_PG
I_OUT = 500mA
V_TRACK
V_OUT
Time (20ms/div)
Figure 1. Tracking Response
DESCRIPTION
The TPS743xx low-dropout (LDO) linear regulators
provide an easy-to-use robust power management
solution for a wide variety of applications. The
TRACK pin allows the output to track an external
supply. This feature is useful in minimizing the stress
on ESD structures that are present between the
CORE and I/O power pins of many processors. The
enable input and power-good output allow easy
sequencing with external regulators. This complete
flexibility allows the user to configure a solution that
meets the sequencing requirements of FPGAs,
DSPs, and other applications with special start-up
requirements.
A precision reference and error amplifier deliver 1%
accuracy over load, line, temperature, and process.
Each LDO is stable with low-cost ceramic output
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
solution size. For applications that require additional
power dissipation, the DDPAK (KTW) package is also
available.
ADJUSTABLE VOLTAGE VERSION
V_IN
V_BIAS
V_TRACK
C_IN
C_BIAS
R₃
R₄
IN
PG
TPS74301
EN
OUT
BIAS
TRACK
FB
GND
V_PG
R₅
V_OUT
R₁
C_OUT
R₂
Optional
V_IN
V_BIAS
V_TRACK
FIXED VOLTAGE VERSION
C_IN
C_BIAS
R₃
IN
PG
TPS743xx
EN
OUT
BIAS
TRACK
GND
SNS
R₄
V_PG
R₅
V_OUT
C_OUT
Optional
Figure 2. Typical Application Circuit
1
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2
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.
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