Switching Regulator. LM2651 Datasheet

LM2651 Regulator. Datasheet pdf. Equivalent


Part LM2651
Description 1.5A High-Efficiency Synchronous Switching Regulator
Feature Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM2651 SNV.
Manufacture etcTI
Datasheet
Download LM2651 Datasheet


LM2651 1.5A High Efficiency Synchronous Switching Regulator LM2651 Datasheet
Product Folder Sample & Buy Technical Documents Tools & S LM2651 Datasheet
Recommendation Recommendation Datasheet LM2651 Datasheet




LM2651
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
LM2651
SNVS032E – FEBRUARY 2000 – REVISED JANUARY 2016
LM2651 1.5 A High-Efficiency Synchronous Switching Regulator
1 Features
1 Ultrahigh Efficiency up to 97%
• High-Efficiency Over a 1.5-A to 1.5-mA Load
Range
• 4-V to 14-V Input Voltage Range
• 1.8-V, 2.5-V, 3.3-V, or ADJ Output Voltage
• Internal MOSFET Switch With Low RDS(on) of
75 m
• 300-kHz Fixed Frequency Internal Oscillator
• 7-µA Shutdown Current
• Patented Current Sensing for Current Mode
Control
• Input Undervoltage Lockout
• Adjustable Soft-Start
• Current Limit and Thermal Shutdown
• 16-Pin TSSOP Package
2 Applications
• Personal Digital Assistants (PDAs)
• Computer Peripherals
• Battery-Powered Devices
• Handheld Scanners
• High-Efficiency 5-V Conversion
3 Description
The LM2651 switching regulator provides high-
efficiency power conversion over a 100:1 load range
(1.5 A to 15 mA). This feature makes the LM2651 an
ideal fit in battery-powered applications that demand
long battery life in both run and standby modes.
Synchronous rectification is used to achieve up to
97% efficiency. At light loads, the LM2651 enters a
low power hysteretic or sleep mode to maintain high
efficiency. In many applications, the efficiency still
exceeds 80% at 15-mA load. A shutdown pin is
available to disable the LM2651 and reduce the
supply current to less than 10 µA.
The LM2651 contains a patented current sensing
circuitry for current mode control. This feature
eliminates the external current sensing resistor
required by other current-mode DC-DC converters.
The LM2651 has a 300-kHz fixed frequency internal
oscillator. The high oscillator frequency allows the
use of extremely small, low-profile components.
A programmable soft-start feature limits current
surges from the input power supply at start-up and
provides a simple means of sequencing multiple
power supplies.
Other protection features include input undervoltage
lockout, current limiting, and thermal shutdown.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM2651
TSSOP (16)
5.00 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application
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.



LM2651
LM2651
SNVS032E – FEBRUARY 2000 – REVISED JANUARY 2016
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......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information ................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 Typical Characteristics .............................................. 8
7 Detailed Description ............................................ 10
7.1 Overview ................................................................. 10
7.2 Functional Block Diagram ....................................... 10
7.3 Feature Description................................................. 11
7.4 Device Functional Modes........................................ 11
8 Application and Implementation ........................ 12
8.1 Application Information............................................ 12
8.2 Typical Application .................................................. 12
9 Power Supply Recommendations...................... 16
10 Layout................................................................... 16
10.1 Layout Guidelines ................................................. 16
10.2 Layout Example .................................................... 16
11 Device and Documentation Support ................. 17
11.1 Community Resources.......................................... 17
11.2 Trademarks ........................................................... 17
11.3 Electrostatic Discharge Caution ............................ 17
11.4 Glossary ................................................................ 17
12 Mechanical, Packaging, and Orderable
Information ........................................................... 17
4 Revision History
Changes from Revision D (April 2013) to Revision E
Page
• Added ESD Ratings table, Thermal Information 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
Product Folder Links: LM2651
Copyright © 2000–2016, Texas Instruments Incorporated







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