TPS79801-Q1 Regulator Datasheet

TPS79801-Q1 Datasheet PDF, Equivalent


Part Number

TPS79801-Q1

Description

Low-Dropout Linear Regulator

Manufacture

etcTI

Total Page 23 Pages
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TPS79801-Q1
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TPS79801-Q1, TPS79850-Q1
SLVS822E – MARCH 2009 – REVISED SEPTEMBER 2015
TPS798xx-Q1 50 mA, 3 V to 50 V, Micropower, Low-Dropout Linear Regulator
1 Features
1 Qualified for Automotive Applications
• Wide Input Voltage Range: 3 V to 50 V
• Low Quiescent Current: 40 μA (Typical)
• Low Dropout Voltage: 300 mV (Typical)
• 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 an 8-Pin MSOP-PowerPAD IC
Package
2 Applications
• Low-Current, High-Voltage Regulators
• Regulators for Battery-Powered Systems
• Telecom
• Automotives
3 Description
The TPS798xx-Q1 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-Q1 an ideal choice
for battery-powered or high-voltage systems.
Quiescent current is also well-controlled in dropout.
Other features of the TPS798xx-Q1 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 from 10-μF to 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-Q1 regulator is available in a 8-pin MSOP-
PowerPAD (DGN) package with an exposed pad for
enhanced thermal management capability.
PART
NUMBER
TPS79801-Q1
TPS79850-Q1
Device Information(1)
PACKAGE
BODY SIZE (NOM)
MSOP-PowerPAD (8)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
IN OUT
VOUT
R2 C1
VIN TPS79801
EN
GND
FB
R1
VOUT = 1.275 V (1 + R2 / R1) + IFBR2
VFB = 1.275 V
IFB = 0.2 µA at 25°C
Output Range = 1.275 V to 28 V
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

TPS79801-Q1
TPS79801-Q1, TPS79850-Q1
SLVS822E – MARCH 2009 – REVISED SEPTEMBER 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 3
6.1 Absolute Maximum Ratings ...................................... 3
6.2 ESD Ratings.............................................................. 3
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 Dissipation Ratings .................................................. 6
6.7 Typical Characteristics .............................................. 7
7 Detailed Description .............................................. 9
7.1 Overview ................................................................... 9
7.2 Functional Block Diagram ......................................... 9
7.3 Feature Description................................................. 10
7.4 Device Functional Modes........................................ 12
8 Application and Implementation ........................ 13
8.1 Application Information............................................ 13
8.2 Typical Application ................................................. 13
9 Power Supply Recommendations...................... 15
9.1 Thermal Considerations .......................................... 15
10 Layout................................................................... 15
10.1 Layout Guidelines ................................................. 15
10.2 Layout Example .................................................... 15
10.3 Thermal Considerations ........................................ 15
11 Device and Documentation Support ................. 17
11.1 Related Links ........................................................ 17
11.2 Community Resources.......................................... 17
11.3 Trademarks ........................................................... 17
11.4 Electrostatic Discharge Caution ............................ 17
11.5 Glossary ................................................................ 17
12 Mechanical, Packaging, and Orderable
Information ........................................................... 17
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision D (August 2011) to Revision E
Page
• Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional
Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device
and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1
2 Submit Documentation Feedback
Copyright © 2009–2015, Texas Instruments Incorporated
Product Folder Links: TPS79801-Q1 TPS79850-Q1


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TPS79801-Q1, TPS79850-Q1 SLV S822E – MARCH 2009 – REVISED SEPTEM BER 2015 TPS798xx-Q1 50 mA, 3 V to 50 V , Micropower, Low-Dropout Linear Regula tor 1 Features •1 Qualified for Auto motive Applications • Wide Input Volt age Range: 3 V to 50 V • Low Quiescen t Current: 40 μA (Typical) • Low Dro pout Voltage: 300 mV (Typical) • Outp ut Current: 50 mA • No Input Protecti on Diodes Needed • Adjustable Output From 1.275 V to 28 V • 1-μA Quiescen t Current in Shutdown • Stable With 1 -μF Output Capacitor • Stable With A luminum, Tantalum, or Ceramic Capacitor s • Reverse Input-Battery Protection • Reverse Output Current Flow Protect ion • Thermal Limiting • Available in an 8-Pin MSOP-PowerPAD IC Package 2 Applications • Low-Current, High-Volt age Regulators • Regulators for Batte ry-Powered Systems • Telecom • Auto motives 3 Description The TPS798xx-Q1 is the first device in a line of 50-V high-voltage micropower low-d.
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