TPS748_15 Datasheet, PDF (1/38 Pages) Texas Instruments – TPS748 1.5-A Low-Dropout Linear Regulator With Programmable Soft-Start

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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
•1 V_OUT Range: 0.8 V to 3.6 V
• Ultralow V_IN Range: 0.8 V to 5.5 V
• V_BIAS Range 2.7 V to 5.5 V
• Low Dropout: 60 mV Typical at 1.5 A, V_BIAS = 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
• V_BIAS Permits Low V_IN 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
• 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
Typical Application Circuit (Adjustable)
3 Description
The TPS748 low-dropout (LDO) linear regulator
provides 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 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 T_J = –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)
TPS748
VSON (10)
VQFN (20)
3.00 mm x 3.00 mm
5.00 mm x 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Turnon Response
V_IN
IN
PG
C_IN
BIAS
R₃
EN ^{TPS74801 OUT}
V_BIAS
C_BIAS
SS
GND
R₁
FB
C_SS
R₂
V_OUT
C_OUT
0.5V/div
1V/div
C_SS = 0nF
C_SS = 1nF
C_SS = 2.2nF
1.2V
0V
V_OUT
V_EN
Time (1ms/div)
1
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.