Voltage Regulator. LM2675N-5.0 Datasheet

LM2675N-5.0 Regulator. Datasheet pdf. Equivalent

LM2675N-5.0 Datasheet
Recommendation LM2675N-5.0 Datasheet
Part LM2675N-5.0
Description 1-A Step-Down Voltage Regulator
Feature LM2675N-5.0; Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM2675 SNV.
Manufacture etcTI
Datasheet
Download LM2675N-5.0 Datasheet




Texas Instruments LM2675N-5.0
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
LM2675
SNVS129F – MAY 2004 – REVISED JUNE 2016
LM2675 SIMPLE SWITCHER® Power Converter High Efficiency
1-A Step-Down Voltage Regulator
1 Features
1 Efficiency up to 96%
• Available in 8-Pin SOIC, PDIP, and 16-Pin WSON
Package
• Requires only 5 External Components
• 3.3-V, 5-V, 12-V, and Adjustable Output Versions
• Adjustable Version Output Voltage Range: 1.21 V
to 37 V
• ±1.5% Maximum Output Voltage Tolerance Over
Line and Load Conditions
• Ensured 1-A Output Load Current
• Wide Input Voltage Range: 8 V to 40 V
• 260-kHz Fixed Frequency Internal Oscillator
• TTL Shutdown Capability, Low-Power Standby
Mode
• Thermal Shutdown and Current Limit Protection
2 Applications
• Simple High Efficiency (>90%) Step-Down (Buck)
Regulator
• Efficient Preregulator for Linear Regulators
• Positive-to-Negative Converter
3 Description
The LM2675 series of regulators are monolithic
integrated DC-DC converter circuits built with a
LMDMOS process. These regulators provide all the
active functions for a step-down (buck) switching
regulator, capable of driving a 1-A load current with
excellent line and load regulation. These devices are
available in fixed output voltages of 3.3 V, 5 V, 12 V,
and an adjustable output version.
Requiring a minimum number of external
components, these regulators are simple to use and
include patented internal frequency compensation
and a fixed frequency oscillator.
The LM2675 series operates at a switching frequency
of 260 kHz, thus allowing smaller-sized filter
components than what would be needed with lower
frequency switching regulators. Because of its very
high efficiency (>90%), the copper traces on the
printed-circuit board are the only heat sinking needed.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
SOIC (8)
5.00 mm × 6.20 mm
LM2675
PDIP (8)
10.16 mm × 6.60 mm
WSON (16)
5.00 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application
Copyright © 2016, Texas Instruments Incorporated
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.



Texas Instruments LM2675N-5.0
LM2675
SNVS129F – MAY 2004 – REVISED JUNE 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Description (continued)......................................... 3
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 ESD Ratings.............................................................. 4
7.3 Recommended Operating Conditions....................... 4
7.4 Thermal Information .................................................. 4
7.5 Electrical Characteristics – 3.3 V .............................. 5
7.6 Electrical Characteristics – 5 V ................................. 5
7.7 Electrical Characteristics – 12 V ............................... 5
7.8 Electrical Characteristics – Adjustable...................... 6
7.9 Electrical Characteristics – All Output Voltage
Versions ..................................................................... 6
7.10 Typical Characteristics ............................................ 7
7.11 Typical Characteristics – Fixed Output Voltage
Versions ..................................................................... 9
8 Detailed Description ............................................ 10
8.1 Overview ................................................................. 10
8.2 Functional Block Diagram ....................................... 10
8.3 Feature Description................................................. 10
8.4 Device Functional Modes........................................ 11
9 Application and Implementation ........................ 12
9.1 Application Information............................................ 12
9.2 Typical Application .................................................. 13
10 Power Supply Recommendations ..................... 24
11 Layout................................................................... 25
11.1 Layout Guidelines ................................................. 25
11.2 Layout Examples................................................... 25
12 Device and Documentation Support ................. 27
12.1 Documentation Support ........................................ 27
12.2 Receiving Notification of Documentation Updates 27
12.3 Community Resources.......................................... 27
12.4 Trademarks ........................................................... 27
12.5 Electrostatic Discharge Caution ............................ 27
12.6 Glossary ................................................................ 27
13 Mechanical, Packaging, and Orderable
Information ........................................................... 27
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision E (June 2005) to Revision F
Page
• Added 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
• Deleted all instances of the computer design software LM267X Made Simple (version 6.0) ................................................ 1
2
Submit Documentation Feedback
Product Folder Links: LM2675
Copyright © 2004–2016, Texas Instruments Incorporated



Texas Instruments LM2675N-5.0
www.ti.com
LM2675
SNVS129F – MAY 2004 – REVISED JUNE 2016
5 Description (continued)
A family of standard inductors for use with the LM2675 are available from several different manufacturers. This
feature greatly simplifies the design of switch-mode power supplies using these advanced ICs. Also included in
the data sheet are selector guides for diodes and capacitors designed to work in switch-mode power supplies.
Other features include ±1.5%-tolerance on output voltage within specified input voltages and output load
conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring typically 50-μA stand-
by current. The output switch includes current limiting, as well as thermal shutdown for full protection under fault
conditions.
6 Pin Configuration and Functions
D or P Package
8-Pin SOIC or PDIP
Top View
NHN Package
16-Pin WSON
Top View
CB
1
NC
2
NC
3
FB
4
8
VSW
7
VIN
6
GND
5
ON/OFF
Not to scale
CB
1
NC
2
NC
3
NC
4
NC
5
NC
6
NC
7
FB
8
DAP
16
VSW
15
VSW
14
VIN
13
NC
12
GND
11
GND
10
NC
9
ON/OFF
NAME
CB
FB
GND
NC
ON/OFF
VIN
VSW
PIN
D, P
1
4
6
2, 3
5
7
8
NHN
1
8
11, 12
2, 3, 4, 5,
6, 7, 10, 13
9
14
15, 16
Not to scale
Pin Functions
I/O
DESCRIPTION
I
Boot-strap capacitor connection for high-side driver. Connect a high quality
470-nF capacitor from CB to VSW pin.
Feedback sense input pin. Connect to the midpoint of feedback divider to set
I
VOUT for adjustable version or connect this pin directly to the output capacitor
for a fixed output version.
Power ground pins. Connect to system ground. Ground pins of CIN and COUT.
Path to CIN must be as short as possible.
— No connect pins.
I
Enable input to the voltage regulator. High = ON and low = OFF. Pull this pin
high or float to enable the regulator.
Supply input pin to collector pin of high side FET. Connect to power supply and
I
input bypass capacitors CIN. Path from VIN pin to high frequency bypass CIN
and GND must be as short as possible.
O
Source pin of the internal High Side FET. This is a switching node. Attached this
pin to an inductor and the cathode of the external diode.
Copyright © 2004–2016, Texas Instruments Incorporated
Product Folder Links: LM2675
Submit Documentation Feedback
3







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