TPS74801 Datasheet, PDF (1/19 Pages) Texas Instruments – 1.5A LDO Linear Regulator with Programmable Soft-Start

TPS74801
www.ti.com
SBVS074 – JANUARY 2007
1.5A LDO Linear Regulator with Programmable Soft-Start
FEATURES
• Ultra-Low V_IN and V_OUT Range: 0.8V to 5.5V
• V_BIAS Range 2.7V to 5.5V
• Low Dropout: 60mV typ at 1.5A, V_BIAS = 5V
• Power Good (PG) Output Allows Supply
Monitoring or Provides a Sequencing Signal
for Other Supplies
• 2% Accuracy Over Line/Load/Temperature
• Programmable Soft-Start Provides Linear
Voltage Startup
• V_BIAS Permits Low V_IN Operation with Good
Transient Response
• Stable with Any Output Capacitor ≥ 2.2µF
• Available in a Small 3mm x 3mm x 1mm
SON-10 Package
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
DESCRIPTION
The TPS74801 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 output capacitor type,
and is fully specified from –40°C to +125°C. The
TPS74801 is offered in a small 3mm × 3mm SON-10
package, yielding a highly compact, total solution
size.
C_SS = 0nF
V_IN
IN
PG
C_IN
BIAS
R₃
EN ^{TPS74801 OUT}
V_BIAS
C_BIAS
SS
R₁
GND
FB
C_SS
R₂
V_OUT
C_OUT
0.5V/div
1V/div
C_SS = 1nF
C_SS = 2.2nF
3.8V
1.8V
Time (1ms/div)
Figure 2. Turn-On Response
V_OUT
V_EN
Figure 1. Typical Application Circuit (Adjustable)
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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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.
Copyright © 2007, Texas Instruments Incorporated