Regulator. LM26003 Datasheet

LM26003 Datasheet PDF


Part LM26003
Description 3-A Switching Regulator
Feature Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM26003, L.
Manufacture etcTI
Datasheet
Download LM26003 Datasheet


Product Folder Sample & Buy Technical Documents Tools & S LM26003 Datasheet
Product Folder Sample & Buy Technical Documents Tools & S LM26003-Q1 Datasheet




LM26003
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
LM26003, LM26003-Q1
SNVS576F – AUGUST 2008 – REVISED FEBRUARY 2015
LM26003-xx 3-A Switching Regulator With High Efficiency Sleep Mode
1 Features
1 LM26003-Q1 is an Automotive-Grade Product
That is AEC-Q100 Grade 1 Qualified (–40°C to
+125°C Operating Junction Temperature)
• High-Efficiency Sleep Mode
• 40-µA Typical Iq in Sleep Mode
• 10.8-µA Typical Iq in Shutdown Mode
• 3.0-V Minimum Input Voltage
• 4.0-V to 38-V Continuous Input Range
• 1.5% Reference Accuracy
• Cycle-by-Cycle Current Limit
• Adjustable Frequency (150 kHz to 500 kHz)
• Synchronizable to an External Clock
• Power Good Flag
• Forced PWM Function
• Adjustable Soft-Start
• 20-Pin HTSSOP Package
• Thermal Shut Down
2 Applications
• Automotive Telematics
• Navigation Systems
• In-Dash Instrumentation
• Battery-Powered Applications
• Standby Power for Home Gateways and Set-Top
Boxes
3 Description
The LM26003 is a switching regulator designed for
the high-efficiency requirements of applications with
standby modes. The device features a low-current
sleep mode to maintain efficiency under light-load
conditions and current-mode control for accurate
regulation over a wide input voltage range. Quiescent
current is reduced to 10.8 µA typically in shutdown
mode and less than 40 µA in sleep mode. Forced
PWM mode is also available to disable sleep mode.
The LM26003 device can deliver up to 3 A of
continuous load current with a fixed current limit,
through the internal N-channel switch. The part has a
wide input voltage range of 4.0 V to 38 V and can
operate with input voltages as low as 3 V during line
transients.
Operating frequency is adjustable from 150 kHz to
500 kHz with a single resistor and can be
synchronized to an external clock.
Other features include Power Good, adjustable soft-
start, enable pin, input undervoltage protection, and
an internal bootstrap diode for reduced component
count.
Device Information(1)
PART NUMBER PACKAGE
BODY SIZE (NOM)
LM26003
LM26003-Q1
HTSSOP (20)
6.50 mm x 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Typical Application Circuit
VIN
C9
PGOOD
R4
VDD
SYNC
EN
C3
R6
R5
1 VIN
2 VIN
3 VIN
4 AVIN
VBIAS 15
20
SW
19
SW
18
SW
5 PGOOD
17
BOOT
6
EN
LM26003 FB 9
14
SYNC
8
COMP
7
SS
16
VDD
12
FREQ
11
PGND
13 FPWM EP AGND 10
21
L1
C6 D1
VOUT
+
R1 C7
C5
C1 R3
R2
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.



LM26003
LM26003, LM26003-Q1
SNVS576F – AUGUST 2008 – REVISED FEBRUARY 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Typical Application Circuit ................................... 1
5 Revision History..................................................... 2
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 ESD Ratings: LM26003 ............................................ 4
7.3 ESD Ratings: LM26003-Q1 ...................................... 4
7.4 Recommended Operating Conditions....................... 4
7.5 Thermal Information .................................................. 5
7.6 Electrical Characteristics........................................... 5
7.7 Switching Characteristics .......................................... 7
7.8 Typical Characteristics .............................................. 8
8 Detailed Description ............................................ 10
8.1 Overview ................................................................. 10
8.2 Functional Block Diagram ....................................... 10
8.3 Feature Description................................................. 11
8.4 Device Functional Modes........................................ 14
9 Application and Implementation ........................ 17
9.1 Application Information............................................ 17
9.2 Typical Application .................................................. 17
10 Power Supply Recommendations ..................... 24
11 Layout................................................................... 24
11.1 Layout Guidelines ................................................. 24
11.2 Layout Example .................................................... 25
11.3 Thermal Considerations and TSD......................... 25
12 Device and Documentation Support ................. 26
12.1 Device Support .................................................... 26
12.2 Documentation Support ........................................ 26
12.3 Related Links ........................................................ 26
12.4 Trademarks ........................................................... 26
12.5 Electrostatic Discharge Caution ............................ 26
12.6 Glossary ................................................................ 26
13 Mechanical, Packaging, and Orderable
Information ........................................................... 26
5 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision E (December 2014) to Revision F
Page
• Changed from 0.575V ........................................................................................................................................................... 6
• Changed 1.365V .................................................................................................................................................................... 6
Changes from Revision D (March 2013) 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
Changes from Revision C (March 2013) to Revision D
Page
• Changed layout of National Data Sheet to TI format ........................................................................................................... 25
2 Submit Documentation Feedback
Copyright © 2008–2015, Texas Instruments Incorporated
Product Folder Links: LM26003 LM26003-Q1






@ 2014 :: Datasheetspdf.com ::
Semiconductors datasheet search & download site (Privacy Policy & Contact)