TPS749xx
www.ti.com
SBVS082G –JUNE 2007–REVISED NOVEMBER 2010
3.0A Low Dropout Linear Regulator with Programmable Soft-Start
Check for Samples: TPS749xx
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FEATURES
DESCRIPTION
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VOUT Range: 0.8V to 3.6V
The TPS749xx low-dropout (LDO) linear regulator
provides an easy-to-use robust power management
Ultralow VIN Range: 0.8V to 5.5V
VBIAS Range: 2.7V to 5.5V
solution for
a
wide variety of applications.
Low Dropout: 120mV (typ) at 3.0A, VBIAS = 5V
User-programmable soft-start minimizes stress on the
input power source by reducing capacitive inrush
current on start-up. The soft-start is monotonic and
well-suited for powering many different types of
processors and ASICs. The enable input and
power-good output allow easy sequencing with
external regulators. This complete flexibility permits
the user to configure a solution that meets the
sequencing requirements of FPGAs, DSPs, and other
applications with special start-up requirements.
Power-Good (PG) Output Allows Supply
Monitoring or Provides a Sequencing Signal
for Other Supplies
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2% Accuracy Over Line/Load/Temperature
Programmable Soft-Start Provides Linear
Voltage Startup
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VBIAS Permits Low VIN Operation with Good
Transient Response
A precision reference and error amplifier deliver 2%
accuracy over load, line, temperature, and process.
The device is stable with any type of capacitor
≥ 2.2mF, and the device is fully specified from –40°C
to +125°C. The TPS749xx is offered in a small (5mm
× 5mm) QFN package, yielding a highly compact total
solution size. It is also available in a DDPAK-7.
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Stable with Any Output Capacitor ≥ 2.2mF
Available in 5mm × 5mm × 1mm QFN and
DDPAK-7 Packages
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Open-Drain Power-Good
Active High Enable
APPLICATIONS
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FPGA Applications
DSP Core and I/O Voltages
Post-Regulation Applications
Applications with Special Start-Up Time or
Sequencing Requirements
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Hot-Swap and Inrush Controls
CSS = 0mF
VOUT
CSS = 0.001mF
VIN
IN
PG
R3
R1
CIN
CSS = 0.0047mF
BIAS
EN
SS
1V/div
VOUT
OUT
TPS74901
VBIAS
COUT
FB
GND
CBIAS
CSS
R2
1.2V
VEN
1V/div
0V
Figure 1. Typical Application Circuit (Adjustable)
Time (1ms/div)
Figure 2. Turn-On Response
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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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