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1V/div
1V/div
Time(1ms/div)
C =0 F
SS
m
C =0.001 F
SS
m
C =0.0047 F
SS
m
V
OUT
V
EN
0V
1.2V
TPS74201
GND
EN
FB
IN PG
BIAS
SS
OUT
V
IN
V
OUT
R
1
R
2
R
3
C
OUT
Optional
C
IN
1µF
C
SS
V
BIAS
C
BIAS
1µF
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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.
TPS74201
SBVS064N –DECEMBER 2005–REVISED NOVEMBER 2016
TPS742
1.5-A Ultra-LDO With Programmable Soft-Start
1
1 Features
1
• Input Voltage Range: 0.8 V to 5.5 V
• Soft-Start (SS) Pin Provides a Linear Start-Up
With Ramp Time Set by External Capacitor
• 1% Accuracy Over Line, Load, and Temperature
• Supports Input Voltages as Low as 0.8 V With
External Bias Supply
• Adjustable Output (0.8 V to 3.6 V)
• Ultra-Low Dropout: 55 mV at 1.5 A (Typical)
• Stable With Any or No Output Capacitor
• Excellent Transient Response
• Open-Drain Power-Good (VQFN)
• Active High Enable
2 Applications
• FPGA Applications
• DSP Core and I/O Voltages
• Servers
• Post-Regulation Applications
• Applications With Special Start-Up Time or
Sequencing Requirements
3 Description
The TPS742 series of low-dropout (LDO) linear
regulators provide an easy-to-use, robust power-
management solution for a wide variety of
applications. 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.
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 TPS742 devices are offered in
a small 5-mm × 5-mm VQFN (RGW) and a small
3.5-mm × 3.5-mm VQFN (RGR) package, yielding a
highly compact total solution size. For applications
that require additional power dissipation, the
DDPAK/TO-263 (KTW) package is also available.
Device Information
(1)
PART
NUMBER
PACKAGE BODY SIZE (NOM)
TPS74201
VQFN (20), RGW 5.00 mm × 5.00 mm
VQFN (20), RGR 3.50 mm × 3.50 mm
DDPAK/TO-263 (7) 8.89 mm × 10.10 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Adjustable Output Version Turnon Response
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