TPS79801-Q1 Datasheet, PDF (1/21 Pages) Texas Instruments – 50 mA, 3 V TO 50 V, MICROPOWER, LOW-DROPOUT LINEAR REGULATOR

TPS79801-Q1, TPS79850-Q1
www.ti.com
SLVS822D – MARCH 2009 – REVISED AUGUST 2011
50 mA, 3 V TO 50 V, MICROPOWER, LOW-DROPOUT LINEAR REGULATOR
Check for Samples: TPS79801-Q1, TPS79850-Q1
FEATURES
1
•23 Qualified for Automotive Applications
• Wide Input Voltage Range: 3 V to 50 V
• Low Quiescent Current: 40 μA (Typ)
• Low Dropout Voltage: 300 mV (Typ)
• Output Current: 50 mA
• No Input Protection Diodes Needed
• Adjustable Output From 1.275 V to 28 V
• 1-μA Quiescent Current in Shutdown
• Stable With 1-μF Output Capacitor
• Stable With Aluminum, Tantalum, or Ceramic
Capacitors
• Reverse Input-Battery Protection
• Reverse Output Current Flow Protection
• Thermal Limiting
• Available in MSOP-8 Package
APPLICATIONS
• Low-Current, High-Voltage Regulators
• Regulators for Battery-Powered Systems
• Telecom
• Automotive
DGN PACKAGE
MSOP-8 PowerPAD™
(TOP VIEW)
OUT
1
SENSE/FB
2
NC
3
GND
4
8
IN
7
NC
6
NC
5
EN
Note: The exposed thermal pad is connected to
ground via pin 4 (GND).
DESCRIPTION
The TPS798xx is the first device in a line of 50-V high-voltage micropower low-dropout (LDO) linear regulators.
This device is capable of supplying 50-mA output current with a dropout voltage of only 300 mV. Designed for
low quiescent current high voltage (50 V) applications, 40 μA operating and 1 μA in shutdown makes the
TPS798xx an ideal choice for battery-powered or high-voltage systems. Quiescent current is also well-controlled
in dropout.
Other features of the TPS798xx include the ability to operate with low equivalent series resistance (ESR) ceramic
output capacitors. This device is stable with only 1 μF on the output; most older devices require between 10-μF
and 100-μF tantalum capacitors for stability. Small ceramic capacitors can be used without the necessary
addition of ESR, as is common with other regulators. Internal protection circuitry includes reverse input-battery
protection, reverse output current protection, current limiting, and thermal limiting to protect the device in various
fault conditions.
This device is available in a fixed output voltage of 5 V (TPS79850) and with an adjustable output voltage with a
1.275-V reference voltage (TPS79801). The TPS798xx regulator is available in a 8-lead MSOP (DGN) package
with an exposed pad for enhanced thermal management capability.
T_J
–40°C to 125°C
V_OUT (NOM)
Adjustable ⁽³⁾
5V
ORDERING INFORMATION⁽¹⁾
PACKAGE ⁽²⁾
ORDERABLE PART
NUMBER
MSOP – DGN Reel of 2500
TPS79801QDGNRQ1
TPS79850QDGNRQ1
TOP-SIDE MARKING
PMRQ
OOLQ
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
(3) For fixed 1.275 V, tie FB to out.
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 © 2009–2011, Texas Instruments Incorporated