TPS731 Datasheet, PDF (1/24 Pages) Texas Instruments – Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection

TPS731xx
www.ti.com .......................................................................................................................................... SBVS034M – SEPTEMBER 2003 – REVISED AUGUST 2009
Cap-Free, NMOS, 150mA Low Dropout Regulator
with Reverse Current Protection
FEATURES
1
•2 Stable with No Output Capacitor or Any Value
or Type of Capacitor
• Input Voltage Range of 1.7V to 5.5V
• Ultralow Dropout Voltage: 30mV Typ
• Excellent Load Transient Response—with or
without Optional Output Capacitor
• New NMOS Topology Provides Low Reverse
Leakage Current
• Low Noise: 30μV_RMS Typ (10kHz to 100kHz)
• 0.5% Initial Accuracy
• 1% Overall Accuracy over Line, Load, and
Temperature
• Less Than 1μA Max I_Q in Shutdown Mode
• Thermal Shutdown and Specified Min/Max
Current Limit Protection
• Available in Multiple Output Voltage Versions
– Fixed Outputs of 1.20V to 5.0V
– Adjustable Outputs from 1.20V to 5.5V
– Custom Outputs Available
DESCRIPTION
The TPS731xx family of low-dropout (LDO) linear
voltage regulators uses a new topology: an NMOS
pass element in a voltage-follower configuration. This
topology is stable using output capacitors with low
ESR, and even allows operation without a capacitor.
It also provides high reverse blockage (low reverse
current) and ground pin current that is nearly constant
over all values of output current.
The TPS731xx uses an advanced BiCMOS process
to yield high precision while delivering very low
dropout voltages and low ground pin current. Current
consumption, when not enabled, is under 1μA and
ideal for portable applications. The extremely low
output noise (30μV_RMS with 0.1μF C_NR) is ideal for
powering VCOs. These devices are protected by
thermal shutdown and foldback current limit.
APPLICATIONS
• Portable/Battery-Powered Equipment
• Post-Regulation for Switching Supplies
• Noise-Sensitive Circuitry such as VCOs
• Point of Load Regulation for DSPs, FPGAs,
ASICs, and Microprocessors
space
Optional
V_IN
ON
OFF
IN
OUT
TPS731xx
EN GND NR
Optional
Optional
V_OUT
DBV PACKAGE
SOT23
(TOP VIEW)
IN
GND
EN
1
5
2
3
4
OUT
NR/FB
Typical Application Circuit for Fixed-Voltage Versions
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
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 © 2003–2009, Texas Instruments Incorporated