TPS7A4901 Datasheet, PDF (1/23 Pages) Texas Instruments – +36V, +150mA, Ultralow-Noise, Positive LINEAR REGULATOR

TPS7A49xx
www.ti.com
SBVS121B – AUGUST 2010 – REVISED JANUARY 2010
+36V, +150mA, Ultralow-Noise, Positive LINEAR REGULATOR
FEATURES
1
•23 Input Voltage Range: +3V to +36V
• Noise:
– 12.7mV_RMS (20Hz to 20kHz)
– 15.4mV_RMS (10Hz to 100kHz)
• Power-Supply Ripple Rejection:
– 72dB (120Hz)
– ≥ 52dB (10Hz to 400kHz)
• Adjustable Output: +1.194V to +33V
• Output Current: 150mA
• Dropout Voltage: 260mV at 100mA
• Stable with Ceramic Capacitors ≥ 2.2mF
• CMOS Logic-Level-Compatible Enable Pin
• Built-In, Fixed, Current-Limit and Thermal
Shutdown Protection
• Available in High Thermal Performance
MSOP-8 PowerPAD™ Package
• Operating Tempature Range: –40°C to +125°C
APPLICATIONS
• Supply Rails for Op Amps, DACs, ADCs, and
Other High-Precision Analog Circuitry
• Audio
• Post DC/DC Converter Regulation and Ripple
Filtering
• Test and Measurement
• RX, TX, and PA Circuitry
• Industrial Instrumention
• Base Stations and Telecom Infrastrucure
DESCRIPTION
The TPS7A49xx series of devices are positive,
high-voltage (+36V), ultralow noise (15.4mV_RMS, 72dB
PSRR) linear regulators capable of sourcing a load of
150mA.
These linear regulators include a CMOS
logic-level-compatible
enable
pin
and
capacitor-programmable soft-start function that allows
for customized power-management schemes. Other
features available include built-in current limit and
thermal shutdown protection to safeguard the device
and system during fault conditions.
The TPS7A49xx family is designed using bipolar
technology, and is ideal for high-accuracy,
high-precision instrumentation applications where
clean voltage rails are critical to maximize system
performance. This design makes it an excellent
choice to power operational amplifiers,
analog-to-digital converters (ADCs), digital-to-analog
converters (DACs), and other high-performance
analog circuitry.
In addition, the TPS7A49xx family of linear regulators
is suitable for post dc/dc converter regulation. By
filtering out the output voltage ripple inherent to dc/dc
switching conversion, maximum system performance
is provided in sensitive instrumentation, test and
measurement, audio, and RF applications.
For applications where both positive and negative
high-performance rails are required, consider TI’s
TPS7A30xx family of negative high-voltage,
ultralow-noise linear regulators as well.
Typical Application
DGN PACKAGE
3mm ´ 5mm MSOP-8 PowerPAD
(TOP VIEW)
OUT
1
FB
2
NC
3
GND
4
8
IN
7
DNC
6
NR/SS
5
EN
+18V
IN OUT
+15V
TPS7A49
EN GND
-18V
IN OUT
-15V
TPS7A30
EN GND
EVM
Post DC/DC Converter Regulation for
High-Performace Analog Circuitry
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.
PowerPAD is a trademark of Texas Instruments.
2
All other trademarks are the property of their respective owners.
3
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 © 2010, Texas Instruments Incorporated