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TPS748
SBVS074K – JANUARY 2007 – REVISED FEBRUARY 2015
TPS748 1.5-A Low-Dropout Linear Regulator With Programmable Soft-Start
1 Features
3 Description
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The TPS748 low-dropout (LDO) linear regulator
provides an easy-to-use robust power management
solution for a wide variety of applications. Userprogrammable soft-start minimizes stress on the input
power source by reducing capacitive inrush current
on start-up. The soft-start is monotonic and wellsuited 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.
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VOUT Range: 0.8 V to 3.6 V
Ultralow VIN Range: 0.8 V to 5.5 V
VBIAS Range 2.7 V to 5.5 V
Low Dropout: 60 mV Typical at 1.5 A, VBIAS = 5 V
Power Good (PG) Output Allows Supply
Monitoring or Provides a Sequencing Signal for
Other Supplies
2% Accuracy Over Line, Load, and Temperature
Programmable Soft-Start Provides Linear Voltage
Startup
VBIAS Permits Low VIN Operation With Good
Transient Response
Stable With Any Output Capacitor ≥ 2.2 μF
Available in a Small, 3-mm × 3-mm × 1-mm
VSON-10 and 5 × 5 QFN-20 Packages
2 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
Hot-Swap and Inrush Controls
A precision reference and error amplifier deliver 2%
accuracy over load, line, temperature, and process.
The device is stable with any type of capacitor
greater than or equal to 2.2 μF, and is fully specified
for TJ = –40°C to 125°C. The TPS748 is offered in a
small, 3-mm × 3-mm, VSON-10 package, yielding a
highly compact, total solution size. The device is also
available in a 5 × 5 QFN-20 package for compatibility
with the TPS744.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
VSON (10)
3.00 mm x 3.00 mm
VQFN (20)
TPS748
5.00 mm x 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Circuit (Adjustable)
Turnon Response
CSS = 0nF
VIN
IN
CIN
PG
R3
BIAS
EN
VBIAS
TPS74801
GND
CSS
VOUT
CSS = 2.2nF
R1
SS
CBIAS
CSS = 1nF
0.5V/div
VOUT
OUT
COUT
FB
1.2V
R2
1V/div
VEN
0V
Time (1ms/div)
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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
