LM2735   
520kHz/1.6MHz - Space-Efficient Boost and SEPIC DC-DC Regulator 		Click link to Download

Features






•Input voltage range 2.7V to 5.5V
•Output voltage range 3V to 24V
•2.1A switch current over full temperature range
•Current-Mode control
•Logic high enable pin
•Ultra low standby current of 80 nA in shutdown
•170 mΩ NMOS switch
•±2% feedback voltage accuracy
•Ease-of-use, small total solution size
• Internal soft-start
• Internal compensation
• Two switching frequencies
• 520 kHz (LM2735-Y)
•  1.6 MHz (LM2735-X)
• Uses small surface mount inductors and chip capacitors
• Tiny SOT23-5, LLP-6, and eMSOP-8 packages
•LM2735Q is AEC-Q100 Grade 1 qualified and is manufactured on an Automotive Grade Flow

Description

The LM2735 is an easy-to-use, space-efficient 2.1A low-side switch regulator ideal for Boost and SEPIC DC-DC regulation. It provides all the active functions to provide local DC/DC conversion with fast-transient response and accurate regulation in the smallest PCB area. Switching frequency is internally set to either 520kHz or 1.6MHz, allowing the use of extremely small surface mount inductor and chip capacitors while providing efficiencies up to 90%. Current-mode control and internal compensation provide ease-of-use, minimal component count, and high-performance regulation over a wide range of operating conditions. External shutdown features an ultra-low standby current of 80 nA ideal for portable applications. Tiny SOT23-5, LLP-6, and eMSOP-8 packages provide space-savings. Additional features include internal soft-start, circuitry to reduce inrush current, pulse-by-pulse current limit, and thermal shutdown.

Applications
•LCD Display Backlighting For Portable Applications
•OLED Panel Power Supply
•USB Powered Devices
•Digital Still and Video Cameras
•White LED Current Source
•Automotive
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LM2735X
 
2.70 <=		 V in Lower
 V		  
<=		 V in Upper
 V		  
<= 5.50
V out 3.00 <=  V <= 24.00
I out    A <= 2.10
Ambient Temperature  °C <= 100


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                                              LM2735
Drag-Select for Table Reset Graph

Typical Application
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Block Diagram
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Typical Performance
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ParametersValues
Output Range Vin to 24
Switch Current 2.25 Amp
Input Min Voltage 2.7 Volt
Input Max Voltage 5.5 Volt
Feedback Voltage 1.255 Volt
Frequency Max 1700, 550 kHz
Output Min 3 Volt
Output Max 24 Volt
Efficiency (peak) 90 %
Sync Pin No
Adj Switch Frequency No
Frequency Min 475, 1500 kHz
On/Off Pin Yes
Error Flag No
SoftStart Yes
Special Features 12V LLP6 EXP DAP, LLP6 EXP DAP, eMSOP8 EXP DAP, SOT23-5, 12V eMSOP8 EXP DAP, 12V SOT23-5
Topology Boost, Sepic, FlyBack
Step-Up Yes
Flyback Yes
RegType Switching Regulator
AEC Q-100 Automotive Grade 1
Automotive Yes

Datasheet
TitleSizeDateOther
Language
LM2735/LM2735Q 520kHz/1.6MHz – Space-Efficient Boost and SEPIC DC-DC Regulator759
Kbytes		3-Feb-09日本語


Featured Application Notes
TitleSizeDateOther
Language
AN-1658: Application Note 1658 LM2735 BOOST and SEPIC DC-DCRegulator408
Kbytes		26-Jun-07日本語
中文


More Application Notes
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AN-1280: Application Note 1280 LM2731/LM2733 Evaluation Board55
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AN-1973: Application Note 1973 Benefits and Challenges of High-Frequency Regulators348
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AN-1408: Application Note 1408 Designing Power Over Ethernet Using LM5070 and DP838651072
Kbytes		10-Jan-06 中文
AN-1837: Application Note 1837 LM2738 Evaluation Board799
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AN-1350: Application Note 1350 LM2734 Evaluation Board639
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AN-1418: Application Note 1418 LM2736 Evaluation Board858
Kbytes		26-Oct-05 中文
AN-1822: Application Note 1822 LMH6733 High Definition Video Transmission Over CAT5691
Kbytes		14-Jan-09 

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM2735XMF/NOPB

RoHS



SOT-23		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
AVNET-EMWorldwide1000
DIGIKEYWorldwide1240
FUTUREWorldwide1100
NEWARKAmericas760
RS COMPONENTSWorldwide335
$1.25 each at 1K+ pcsreel
of
1000
LM2735XQMF/NOPB

RoHS



SOT-23		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide1994
$1.55 each at 1K+ pcsreel
of
1000
LM2735YMF/NOPB

RoHS



SOT-23		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
ARROWWorldwide5000
AVNET-EMWorldwide1000
DIGIKEYWorldwide2164
FARNELLEurope and Asia1721
FUTUREWorldwide1100
NEWARKAmericas517
RS COMPONENTSWorldwide210
$1.25 each at 1K+ pcsreel
of
1000
LM2735YQMF/NOPB

RoHS



SOT-23		Full production
Lead Time: 12 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide1991
$1.55 each at 1K+ pcsreel
of
1000
LM2735XMFX/NOPB

RoHS



SOT-23		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.25 each at 1K+ pcsreel
of
3000
LM2735XQMFX/NOPB

RoHS



SOT-23		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.55 each at 1K+ pcsreel
of
3000
LM2735YMFX/NOPB

RoHS



SOT-23		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.25 each at 1K+ pcsreel
of
3000
LM2735YQMFX/NOPB

RoHS



SOT-23		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.55 each at 1K+ pcsreel
of
3000
LM2735XMY/NOPB

RoHS



MINI SOIC EXP PAD		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide1873
FARNELLEurope and Asia918
NEWARKAmericas801
RS COMPONENTSWorldwide12
$1.25 each at 1K+ pcsreel
of
1000
LM2735YMY/NOPB

RoHS



MINI SOIC EXP PAD		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide1867
NEWARKAmericas920
RS COMPONENTSWorldwide460
$1.25 each at 1K+ pcsreel
of
1000
LM2735XMYX/NOPB

RoHS



MINI SOIC EXP PAD		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.25 each at 1K+ pcsreel
of
3500
LM2735YMYX/NOPB

RoHS



MINI SOIC EXP PAD		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.25 each at 1K+ pcsreel
of
3500
LM2735XSD/NOPB

RoHS



LLP		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide1232
NEWARKAmericas819
$1.25 each at 1K+ pcsreel
of
1000
LM2735YSD/NOPB

RoHS



LLP		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide3486
FUTUREWorldwide1100
NEWARKAmericas940
$1.25 each at 1K+ pcsreel
of
1000
LM2735XSDX/NOPB

RoHS



LLP		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.25 each at 1K+ pcsreel
of
4500
LM2735YSDX/NOPB

RoHS



LLP		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.25 each at 1K+ pcsreel
of
4500

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM2735SD3.3EVAL
520kHz/1.6MHz - Space-Efficient Boost and SEPIC DC-DC Regulator LM2735X SEPIC 6-Pin LLP Demo BoardFull production


 
DistributorRegionQty
DIGIKEYWorldwide0
NATIONALWorldwide78
$37.50 each1

Features:

  • Input voltage range 2.7V to 5.5V
  • Output voltage range 3V to 24V
  • 2.1A switch current over full temperature range
  • Current-Mode control
  • Logic high enable pin
  • Ultra low standby current of 80 nA in shutdown
  • 170Ωm NMOS switch
  • ± 2% feedback voltage accuracy
  • Ease-of-use, small total solution size
          • Internal soft-start
          • Internal compensation
          • Two switching frequencies
          • 520 kHz (LM2735-Y)
          • 1.6 MHz (LM2735-X)
          • Uses small surface mount inductors and chip capacitors
          • Tiny SOT23-5, LLP-6, and eMSOP-8 packages

Applications:

  • LCD Display Backlighting for Portable Applications
  • OLED Panel Power Supply
  • USB Powered Devices
  • Digital Still and Video Cameras
  • White LED Current Source

Contents:

  • LM2735 Fully Assembled Evaluation Board
  • LM2735 Evaluation Board Appnote
  • A LM2735 Datasheet

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM2735XMFEVAL
520kHz/1.6MHz - Space-Efficient Boost and SEPIC DC-DC Regulator LM2735X Boost 5-Pin SOT23 Demo BoardFull production


 
DistributorRegionQty
DIGIKEYWorldwide0
NATIONALWorldwide18
$37.50 each1

Features:

  • Input voltage range 2.7V to 5.5V
  • Output voltage range 3V to 24V
  • 2.1A switch current over full temperature range
  • Current-Mode control
  • Logic high enable pin
  • Ultra low standby current of 80 nA in shutdown
  • 170Ωm NMOS switch
  • ± 2% feedback voltage accuracy
  • Ease-of-use, small total solution size
          • Internal soft-start
          • Internal compensation
          • Two switching frequencies
          • 520 kHz (LM2735-Y)
          • 1.6 MHz (LM2735-X)
          • Uses small surface mount inductors and chip capacitors
          • Tiny SOT23-5, LLP-6, and eMSOP-8 packages

Applications:

  • LCD Display Backlighting for Portable Applications
  • OLED Panel Power Supply
  • USB Powered Devices
  • Digital Still and Video Cameras
  • White LED Current Source

Contents:

  • LM2735 Fully Assembled Evaluation Board
  • LM2735 Evaluation Board Appnote
  • A LM2735 Datasheet

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM2735XMYEVAL
520kHz/1.6MHz Space-Efficient Boost and SEPIC DC-DC Regulator LM2735Y Boost 8-Pin eMSOP Demo BoardFull production


 
DistributorRegionQty
DIGIKEYWorldwide0
NATIONALWorldwide76
$37.50 each1

Features:

  • Input voltage range 2.7V to 5.5V
  • Output voltage range 3V to 24V
  • 2.1A switch current over full temperature range
  • Current-Mode control
  • Logic high enable pin
  • Ultra low standby current of 80 nA in shutdown
  • 170Ωm NMOS switch
  • ± 2% feedback voltage accuracy
  • Ease-of-use, small total solution size
          • Internal soft-start
          • Internal compensation
          • Two switching frequencies
          • 520 kHz (LM2735-Y)
          • 1.6 MHz (LM2735-X)
          • Uses small surface mount inductors and chip capacitors
          • Tiny SOT23-5, LLP-6, and eMSOP-8 packages

Contents:

  • LM2735 Fully Assembled Evaluation Board
  • LM2735 Evaluation Board Appnote
  • LM2735 Datasheet

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM2735XSDEVAL
520kHz/1.6MHz Space-Efficient Boost and SEPIC DC-DC Regulator LM2735X Boost 6-Pin LLP Demo BoardFull production


 
DistributorRegionQty
DIGIKEYWorldwide0
NATIONALWorldwide77
$37.50 each1

Features:

  • Input voltage range 2.7V to 5.5V
  • Output voltage range 3V to 24V
  • 2.1A switch current over full temperature range
  • Current-Mode control
  • Logic high enable pin
  • Ultra low standby current of 80 nA in shutdown
  • 170Ωm NMOS switch
  • ± 2% feedback voltage accuracy
  • Ease-of-use, small total solution size
          • Internal soft-start
          • Internal compensation
          • Two switching frequencies
          • 520 kHz (LM2735-Y)
          • 1.6 MHz (LM2735-X)
          • Uses small surface mount inductors and chip capacitors
          • Tiny SOT23-5, LLP-6, and eMSOP-8 packages

Applications:

  • LCD Display Backlighting for Portable Applications
  • OLED Panel Power Supply
  • USB Powered Devices
  • Digital Still and Video Cameras
  • White LED Current Source

Contents:

  • LM2735 Fully Assembled Evaluation Board
  • LM2735 Evaluation Board Appnote
  • LM2735 Datasheet

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM2735YMFEVAL
520kHz/1.6MHz Space-Efficient Boost and SEPIC DC-DC Regulator LM2735Y Boost 5-Pin SOT23 Demo BoardFull production


 
DistributorRegionQty
DIGIKEYWorldwide0
NATIONALWorldwide47
$37.50 each1

Features:

  • Input voltage range 2.7V to 5.5V
  • Output voltage range 3V to 24V
  • 2.1A switch current over full temperature range
  • Current-Mode control
  • Logic high enable pin
  • Ultra low standby current of 80 nA in shutdown
  • 170Ωm NMOS switch
  • ± 2% feedback voltage accuracy
  • Ease-of-use, small total solution size
          • Internal soft-start
          • Internal compensation
          • Two switching frequencies
          • 520 kHz (LM2735-Y)
          • 1.6 MHz (LM2735-X)
          • Uses small surface mount inductors and chip capacitors
          • Tiny SOT23-5, LLP-6, and eMSOP-8 packages

Applications:

  • LCD Display Backlighting for Portable Applications
  • OLED Panel Power Supply
  • USB Powered Devices
  • Digital Still and Video Cameras
  • White LED Current Source

Contents:

  • LM2735 Fully Assembled Evaluation Board
  • LM2735 Evaluation Board Appnote
  • LM2735 Datasheet

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM2735YMYEVAL
520kHz/1.6MHz Space-Efficient Boost and SEPIC DC-DC Regulator LM2735X Boost 8-Pin eMSOP Demo BoardFull production


 
DistributorRegionQty
DIGIKEYWorldwide0
NATIONALWorldwide80
$37.50 each1

Features:

  • Input voltage range 2.7V to 5.5V
  • Output voltage range 3V to 24V
  • 2.1A switch current over full temperature range
  • Current-Mode control
  • Logic high enable pin
  • Ultra low standby current of 80 nA in shutdown
  • 170Ωm NMOS switch
  • ± 2% feedback voltage accuracy
  • Ease-of-use, small total solution size
          • Internal soft-start
          • Internal compensation
          • Two switching frequencies
          • 520 kHz (LM2735-Y)
          • 1.6 MHz (LM2735-X)
          • Uses small surface mount inductors and chip capacitors
          • Tiny SOT23-5, LLP-6, and eMSOP-8 packages

Applications:

  • LCD Display Backlighting for Portable Applications
  • OLED Panel Power Supply
  • USB Powered Devices
  • Digital Still and Video Cameras
  • White LED Current Source

Contents:

  • LM2735 Fully Assembled Evaluation Board
  • LM2735 Evaluation Board Appnote
  • LM2735 Datasheet

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM2735YSDEVAL
520kHz/1.6MHz Space-Efficient Boost and SEPIC DC-DC Regulator LM2735Y Boost 6-Pin LLP Demo BoardFull production


 
DistributorRegionQty
DIGIKEYWorldwide0
NATIONALWorldwide90
$37.50 each1

Features:

  • Input voltage range 2.7V to 5.5V
  • Output voltage range 3V to 24V
  • 2.1A switch current over full temperature range
  • Current-Mode control
  • Logic high enable pin
  • Ultra low standby current of 80 nA in shutdown
  • 170Ωm NMOS switch
  • ± 2% feedback voltage accuracy
  • Ease-of-use, small total solution size
          • Internal soft-start
          • Internal compensation
          • Two switching frequencies
          • 520 kHz (LM2735-Y)
          • 1.6 MHz (LM2735-X)
          • Uses small surface mount inductors and chip capacitors
          • Tiny SOT23-5, LLP-6, and eMSOP-8 packages

Applications:

  • LCD Display Backlighting for Portable Applications
  • OLED Panel Power Supply
  • USB Powered Devices
  • Digital Still and Video Cameras
  • White LED Current Source

Contents:

  • LM2735 Fully Assembled Evaluation Board
  • LM2735 Evaluation Board Appnote
  • LM2735 Datasheet

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHSCAD SymbolsModelsPackage
Marking
Format
LM2735XMF/NOPB
SOT-2351260RoHSDownloadN/A
SLEB
XTT
LM2735XQMF/NOPB
SOT-2351260RoHSDownloadN/A
SVDB
XTT
LM2735YMF/NOPB
SOT-2351260RoHSDownloadN/A
SLFB
XTT
LM2735YQMF/NOPB
SOT-2351260RoHSDownloadN/A
SXUB
XTT
LM2735XMFX/NOPB
SOT-2351260RoHSDownloadN/A
SLEB
XTT
LM2735XQMFX/NOPB
SOT-2351260RoHSDownloadN/A
SVDB
XTT
LM2735YMFX/NOPB
SOT-2351260RoHSDownloadN/A
SLFB
XTT
LM2735YQMFX/NOPB
SOT-2351260RoHSDownloadN/A
SXUB
XTT
LM2735XMY/NOPB
MINI SOIC EXP PAD81260RoHSDownloadN/A
ZXTT
SRJB
LM2735YMY/NOPB
MINI SOIC EXP PAD81260RoHSDownloadN/A
ZXTT
SRKB
LM2735XMYX/NOPB
MINI SOIC EXP PAD81260RoHSDownloadN/A
ZXTT
SRJB
LM2735YMYX/NOPB
MINI SOIC EXP PAD81260RoHSDownloadN/A
ZXTT
SRKB
LM2735XSD/NOPB
LLP61260RoHSDownloadN/A
ZXYTT
2735X
LM2735YSD/NOPB
LLP61260RoHSDownloadN/A
ZXYTT
2735Y
LM2735XSDX/NOPB
LLP61260RoHSDownloadN/A
ZXYTT
2735X
LM2735YSDX/NOPB
LLP61260RoHSDownloadN/A
ZXYTT
2735Y

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM2735XMFPVIP05009960008550005242608584
LM2735XMFXPVIP05009960008550005242608584
LM2735XMYPVIP05009960008550005242608584
LM2735XMYXPVIP05009960008550005242608584
LM2735XQMFPVIP05009960008550005242608584
LM2735XQMFXPVIP05009960008550005242608584
LM2735XSDPVIP05009960008550005242608584
LM2735XSDXPVIP05009960008550005242608584
LM2735YMFPVIP05009960008550005242608584
LM2735YMFXPVIP05009960008550005242608584
LM2735YMYPVIP05009960008550005242608584
LM2735YMYXPVIP05009960008550005242608584
LM2735YQMFPVIP05009960008550005242608584
LM2735YQMFXPVIP05009960008550005242608584
LM2735YSDPVIP05009960008550005242608584
LM2735YSDXPVIP05009960008550005242608584

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.


Power for Portable Applications (Boost, Buck-Boost, & Integrated)
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Power for Portable Applications (Boost, Buck-Boost, & Integrated)
Date: 01/15/08
Length: 0:4:25
[Information as of 21-Nov-2009]