TPS7A3401 Datasheet, PDF (1/18 Pages) Texas Instruments – -20-V, -200-mA, Low-Noise NEGATIVE VOLTAGE REGULATOR

TPS7A3401
www.ti.com
SBVS163 – JUNE 2011
–20-V, –200-mA, Low-Noise NEGATIVE VOLTAGE REGULATOR
Check for Samples: TPS7A3401
FEATURES
1
•23 Input Voltage Range: –3 V to –20 V
• Noise:
– 80 μV_RMS (10 Hz to 100 kHz)
• Power-Supply Ripple Rejection:
– 50 dB (1 kHz)
– ≥ 27 dB (10 Hz to 1 MHz)
• Adjustable Output: ~ –1.18 V to –18 V
• Maximum Output Current: 200 mA
• Dropout Voltage: 500 mV at 100 mA
• Stable with Ceramic Capacitors ≥ 2.2 μF
• 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
• Cost-Effective Supply Rails for Op Amps,
DACs, ADCs, and Other High-Precision Analog
Circuitry
• Cost-Effective Post DC/DC Converter
Regulation and Ripple Filtering
DESCRIPTION
The TPS7A3401 is a negative, high-voltage (–20 V),
low-noise linear regulator capable of sourcing a
maximum load of 200 mA.
These linear regulators include a CMOS
logic-level-compatible enable pin. Other features
available include built-in current limit and thermal
shutdown protection to safeguard the device and
system during fault conditions.
The TPS7A3401 is designed using bipolar
technology, and is ideal for instrumentation
applications where clean voltage rails are critical to
improve system performance. This design makes it a
cost-effective choice to power operational amplifiers,
analog-to-digital converters (ADCs), digital-to-analog
converters (DACs), and other analog circuitry.
In addition, the TPS7A3401 linear regulator is
suitable for cost-effective, post dc/dc converter
regulation. By filtering out the output voltage ripple
inherent to dc/dc switching conversion, increased
system performance is provided in instrumentation
applications.
Typical Application
DGN PACKAGE
3mm ´ 5mm MSOP-8 PowerPAD
(TOP VIEW)
OUT
1
FB
2
GND
3
GND
4
8
IN
7
GND
6
GND
5
EN
+18V
IN OUT
+15V
TPS7A49
EN GND
-18V
IN OUT
-15V
TPS7A34
EN GND
EVM
Post DC/DC Converter Regulation
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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 © 2011, Texas Instruments Incorporated