Datasheet

Device
OUT
FB
GND
C
IN
R
1
C
BYP
C
OUT
IN
EN
V
IN
V
OUT
R
2
V
EN
V
IN
28 V
2
1
3
4
7
8
6
5
FB
NC
GND
OUT
EN
NC
NC
IN
DGN PACKAGE
3-mm 5-mm MSOP-8 PowerPAD
(TOP VIEW)
´
TPS7A42
www.ti.com SBVS184 –DECEMBER 2011
28-V Input Voltage, 50-mA Voltage Regulator
Check for Samples: TPS7A42
1
FEATURES
DESCRIPTION
The TPS7A42 is a very high voltage-tolerant linear
23
• Wide Input Voltage Range: 7 V to 28 V
regulator that offers the benefits of a
• Accuracy:
thermally-enhanced package (MSOP-8), and is able
– Nominal: 1%
to withstand continuous dc or transient input voltages
of up to 28 V.
– Over Line, Load, and Temperature: 2.5%
• Low Quiescent Current: 25 µA
The TPS7A42 is stable with any output capacitance
greater than 4.7 µF and any input capacitance
• Quiescent Current at Shutdown: 4.1 µA
greater than 1 µF (over temperature and tolerance).
• Maximum Output Current: 50 mA
Therefore, implementations of this device require
• CMOS Logic-Level-Compatible Enable Pin
minimal board space because of its miniaturized
packaging (MSOP-8) and a potentially small output
• Adjustable Output Voltage: ~1.175 V to 26 V
capacitor. In addition, the TPS7A42 offers an enable
• Stable with Ceramic Capacitors:
pin (EN) compatible with standard CMOS logic to
– Input Capacitance: ≥ 1 µF
enable a low-current shutdown mode.
– Output Capacitance: ≥ 4.7 µF
The TPS7A42 has an internal thermal shutdown and
• Dropout Voltage: 290 mV
current limiting to protect the system during fault
conditions. The MSOP-8 packages has an operating
• Built-In Current-Limit and Thermal Shutdown
temperature range of T
J
= –40°C to +125°C.
Protection
In addition, the TPS7A42 is ideal for generating a
• Package: High Thermal Performance MSOP-8
low-voltage supply from intermediate voltage rails in
PowerPAD™
telecom and industrial applications; not only it can
• Operating Temperature Range: –40°C to
supply a well-regulated voltage rail, but it can also
+125°C
withstand and maintain regulation during fast voltage
transients. These features translate to simpler and
APPLICATIONS
more cost-effective electrical surge-protection circuitry
for a wide range of applications.
• Microprocessors, Microcontrollers Powered by
Industrial Busses with High Voltage Transients
Typical Application
• Industrial Automation
• Automotive
• LED Lighting
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.
2PowerPAD is a trademark of Texas Instruments.
3All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2011, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.