TPS74701 Datasheet, PDF (1/24 Pages) Texas Instruments – 500mA Low-Dropout Linear Regulator with Programmable Soft-Start

TPS74701
www.ti.com
SBVS099A – NOVEMBER 2007 – REVISED NOVEMBER 2007
500mA Low-Dropout Linear Regulator with Programmable Soft-Start
FEATURES
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•2 Ultra-Low V_IN and V_OUT Range: 0.8V to 5.5V
• V_BIAS Range 2.7V to 5.5V
• Low Dropout: 50mV typ at 500mA, 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 × 3mm × 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 TPS74701 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 2.2µF, and is fully specified
from –40°C to +125°C. The TPS74701 is offered in a
small 3mm × 3mm SON-10 package for compatibility
with the TPS74801.
V_IN
IN
PG
C_IN
BIAS
R₃
EN ^{TPS74701 OUT}
V_BIAS
C_BIAS
SS
GND
R₁
FB
C_SS
R₂
V_OUT
C_OUT
Figure 1. Typical Application Circuit (Adjustable)
0.5V/div
C_SS = 0nF
C_SS = 560pF
C_SS = 5600pF
1V/div
3.8V
1.8V
Time (2ms/div)
Figure 2. Turn-On Response
V_OUT
V_EN
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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