TPS74801-Q1_13 Datasheet, PDF (1/29 Pages) Texas Instruments – 1.5 A Low-Dropout Linear Regulator with Programmable Soft-Start

TPS74801-Q1
www.ti.com
SLVSAI4B – OCTOBER 2010 – REVISED JULY 2013
1.5 A Low-Dropout Linear Regulator with Programmable Soft-Start
Check for Samples: TPS74801-Q1
FEATURES
1
•2 Qualified for Automotive Applications
• AEC-Q100 Qualified with the Following
Results:
– Device Temperature Grade 1: –40°C to
125°C Ambient Operating Temperature
Range
– Device HBM ESD Classification Level H2
– Device HBM ESD Classification Level C4B
• 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 typ 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/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 x 3-mm x 1-mm
SON-10 and 5 x 5 QFN-20 Packages
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-Q1 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
from –40°C to 105°C for the DRC package, and from
–40°C to 125°C for the RGW package. The
TPS74801-Q1 is offered in a small 3-mm × 3-mm
SON-10 package, yielding a highly compact, total
solution size. It is also available in a 5 x 5 QFN-20 for
compatibility with the TPS74401.
C_SS = 0nF
V_IN
IN
PG
C_IN
BIAS
R₃
EN ^{TPS74801 OUT}
V_BIAS
C_BIAS
SS
GND
R₁
FB
C_SS
R₂
0.5V/div
V_OUT
C_OUT
1V/div
C_SS = 1nF
C_SS = 2.2nF
1.2V
0V
V_OUT
V_EN
Figure 1. Typical Application Circuit (Adjustable)
Time (1ms/div)
Figure 2. Turn-On Response
1
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2
PRODUCTION DATA information is current as of publication date.
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necessarily include testing of all parameters.
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