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Boost Regulator. LM26981 Datasheet

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Boost Regulator. LM26981 Datasheet
















LM26981 Regulator. Datasheet pdf. Equivalent













Part

LM26981

Description

35-A Boost Regulator



Feature


Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM2698 SNVS153F – MAY 2001 – REVISED SEPTEMBER 2016 LM2698 SIMP LE SWITCHER® 1.35-A Boost Regulator 1 Features •1 1.9-A, 0.2-Ω Internal S witch (Typical) • Operating Voltage a s Low as 2.2 V • 600 kHz to 1.25 MHz Adjustable Frequency Operation • Swit chers Made Simple® Software • 8-.
Manufacture

Texas Instruments

Datasheet
Download LM26981 Datasheet


Texas Instruments LM26981

LM26981; Pin VSSOP Package 2 Applications • 3.3 V to 5 V and 5 V to 12 V Conversion Distributed Power • Set-Top Boxes DSL Modems • Diagnostic Medical In strumentation • Boost Converters • Flyback Converters • SEPIC Converters 3 Description The LM2698 device is a general purpose PWM boost converter. Th e 1.9-A, 18-V, 0.2-Ω internal switch e nables the LM2698 to provide effici.


Texas Instruments LM26981

ent power conversion to outputs ranging from 2.2 V to 17 V. It can operate with input voltages as low as 2.2 V and as high as 12 V. Current-mode architecture provides superior line and load regula tion and simple frequency compensation over the device's 2.2 V to 12 V input v oltage range. The LM2698 sets the stand ard in power density and is capable of supplying 12 V at .


Texas Instruments LM26981

400 mA from a 5-V input. The LM2698 can also be used in flyback or SEPIC topolo gies. The LM2698 SIMPLE SWITCHER® feat ures a pin selectable switching frequen cy of either 600 kHz or 1.25 MHz. This promotes flexibility in component selec tion and filtering techniques. A shutdo wn pin is available to suspend the devi ce and decrease the quiescent current t o 5 µA. An external.





Part

LM26981

Description

35-A Boost Regulator



Feature


Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM2698 SNVS153F – MAY 2001 – REVISED SEPTEMBER 2016 LM2698 SIMP LE SWITCHER® 1.35-A Boost Regulator 1 Features •1 1.9-A, 0.2-Ω Internal S witch (Typical) • Operating Voltage a s Low as 2.2 V • 600 kHz to 1.25 MHz Adjustable Frequency Operation • Swit chers Made Simple® Software • 8-.
Manufacture

Texas Instruments

Datasheet
Download LM26981 Datasheet




 LM26981
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
LM2698
SNVS153F – MAY 2001 – REVISED SEPTEMBER 2016
LM2698 SIMPLE SWITCHER® 1.35-A Boost Regulator
1 Features
1 1.9-A, 0.2-Ω Internal Switch (Typical)
• Operating Voltage as Low as 2.2 V
• 600 kHz to 1.25 MHz Adjustable Frequency
Operation
• Switchers Made Simple® Software
• 8-Pin VSSOP Package
2 Applications
• 3.3 V to 5 V and 5 V to 12 V Conversion
• Distributed Power
• Set-Top Boxes
• DSL Modems
• Diagnostic Medical Instrumentation
• Boost Converters
• Flyback Converters
• SEPIC Converters
3 Description
The LM2698 device is a general purpose PWM boost
converter. The 1.9-A, 18-V, 0.2-Ω internal switch
enables the LM2698 to provide efficient power
conversion to outputs ranging from 2.2 V to 17 V. It
can operate with input voltages as low as 2.2 V and
as high as 12 V. Current-mode architecture provides
superior line and load regulation and simple
frequency compensation over the device's 2.2 V to
12 V input voltage range. The LM2698 sets the
standard in power density and is capable of supplying
12 V at 400 mA from a 5-V input. The LM2698 can
also be used in flyback or SEPIC topologies.
The LM2698 SIMPLE SWITCHER® features a pin
selectable switching frequency of either 600 kHz or
1.25 MHz. This promotes flexibility in component
selection and filtering techniques. A shutdown pin is
available to suspend the device and decrease the
quiescent current to 5 µA. An external compensation
pin gives the user flexibility in setting frequency
compensation, which makes possible the use of
small, low-ESR ceramic capacitors at the output.
Switchers Made Simple® software is available to
ensure a quick, easy, and assured design. The
LM2698 is available in a low-profile, 8-pin VSSOP
(DGK) package.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM2698
VSSOP (8)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4.5V-5.5V
Typical Application Circuit
L
10PH
D
Battery or
Power Source
5
6 VIN
3 SHDN
SW
FSLCT 7
LM2698
FB 2
VC
GND
1
4
CIN
22PF, 10V
RC
24.9k
CC
4.7 nF
RFB1
30.1k
12V
400mA
RFB2
3.48k
COUT
10PF
CIN: LMK316F226Z (TAIYO YUDEN)
COUT: EMK325B5106K (TAIYO YUDEN)
L: DO3316-103 (COILCRAFT)
D: 0MQ040N (MOTOROLA)
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.




 LM26981
LM2698
SNVS153F – MAY 2001 – REVISED SEPTEMBER 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 .................................................. 5
6.5 Electrical Characteristics........................................... 5
6.6 Typical Characteristics .............................................. 7
7 Detailed Description .............................................. 9
7.1 Overview .................................................................. 9
7.2 Functional Block Diagram ......................................... 9
7.3 Feature Description................................................... 9
7.4 Device Functional Modes........................................ 12
8 Application and Implementation ........................ 14
8.1 Application Information............................................ 14
8.2 Typical Applications ................................................ 14
9 Power Supply Recommendations...................... 22
10 Layout................................................................... 22
10.1 Layout Guidelines ................................................. 22
10.2 Layout Examples................................................... 22
11 Device and Documentation Support ................. 24
11.1 Receiving Notification of Documentation Updates 24
11.2 Community Resources.......................................... 24
11.3 Trademarks ........................................................... 24
11.4 Electrostatic Discharge Caution ............................ 24
11.5 Glossary ................................................................ 24
12 Mechanical, Packaging, and Orderable
Information ........................................................... 24
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision E (April 2013) 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 Ordering Information table, see POA at the end of the datasheet. .......................................................................... 1
• Changed values in the Thermal Information table to align with JEDEC standards................................................................ 5
Changes from Revision D (April 2013) to Revision E
Page
• Changed layout of National Semiconductor Data Sheet to TI format .................................................................................... 1
2
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Product Folder Links: LM2698
Copyright © 2001–2016, Texas Instruments Incorporated




 LM26981
www.ti.com
5 Pin Configuration and Functions
DGK Package
8-Pin VSSOP
Top View
LM2698
SNVS153F – MAY 2001 – REVISED SEPTEMBER 2016
VC
1
FB
2
SHDN
3
GND
4
8
NC
7
FSLCT
6
VIN
5
VSW
Not to scale
PIN
NO.
NAME
1
VC
2
FB
3
SHDN
4
GND
5
VSW
6
VIN
7
FSLCT
8
NC
Pin Functions
TYPE (1)
DESCRIPTION
A
Compensation network connection. Connected to the output of the voltage error amplifier.
A
Output voltage feedback input.
I
Shutdown control input, active low.
G
Analog and power ground.
A
Power switch input. Switch connected between SW pin and GND pin.
P
Analog power input.
I
Switching frequency select input. VIN= 1.25 MHz. Ground = 600 kHz.
Connect to ground.
(1) A = Analog, G = Ground, I = Input, P = Power
Copyright © 2001–2016, Texas Instruments Incorporated
Product Folder Links: LM2698
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