LM2733 - 0.6/1.6 MHz Boost Converters With 40V Internal FET Switch in SOT-23

Datasheet	Packaging	Samples & Pricing	Eval. Boards	Reliability	Design Tools	Application Notes	Knowledge Base

Features

•	40V DMOS FET switch
•	1.6 MHz (“X”), 0.6 MHz (“Y”) switching frequency
•	Low R_DS(ON) DMOS FET
•	Switch current up to 1A
•	Wide input voltage range (2.7V–14V)
•	Low shutdown current (<1 µA)
•	5-Lead SOT-23 package
•	Uses tiny capacitors and inductors
•	Cycle-by-cycle current limiting
•	Internally compensated

General Description

The LM2733 switching regulators are current-mode boost converters operating fixed frequency of 1.6 MHz (“X” option) and 600 kHz (“Y” option).

The use of SOT-23 package, made possible by the minimal power loss of the internal 1A switch, and use of small inductors and capacitors result in the industry's highest power density. More...

Applications

•	White LED Current Source
•	PDA’s and Palm-Top Computers
•	Digital Cameras
•	Portable Phones and Games
•	Local Boost Regulator

Typical Application

click for larger image

Parameters Values

Output Range Vin to 40V

Switch Current 1 Amp

Input Min Voltage 2.7 Volt

Input Max Voltage 14 Volt

Frequency Max 600, 1600 kHz

Output Min 3 Volt

Output Max 40 Volt

Sync Pin No

Adj Switch Frequency No

Frequency Min 600, 1600 kHz

On/Off Pin Yes

Error Flag No

PWM Mode Current

Topology Boost

Step-Up Yes

Inverting No

Flyback No

RegType Switching Regulator

Adjustable Output Yes

Temperature Min -40 deg C

Temperature Max 125 deg C

Automotive Yes

PowerWise No

Typical Performance

click for larger image

Also Recommended

LM2731▲	1.5A / 22V Internal Switch. SOT-23 Package
LM2735▲	2.1A/ 24V Internal Switch In SOT23, LLP, And EMSOP Packages

Additional Resources

Design Tools

Application Notes

Block Diagram

click for larger image

Datasheet

RoHS Compliance Information	Size in Kbytes	Date
LM2733 0.6/1.6 MHz Boost Converters With 40V Internal FET Switch in SOT-23	406 Kbytes	8-Jul-07	Download
LM2733 0.6/1.6 MHz Boost Converters With 40V Internal FET Switch in SOT-23 (Japanese)	522 Kbytes

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Package Availability, Models, Samples & Pricing

Part Number

Package

Factory Lead Time

Models

Samples &
Electronic
Orders

Budgetary Pricing

Std
Pack
Size

Package
Marking
Format

Type

Pins

Spec.

MSL
Rating

Peak
Reflow

RoHS
Report

CAD
Symbols

Weeks

Qty

$US each

LM2733XEVAL

0.6/1.6 MHz Boost Converters With 40V Internal FET Switch in SOT-23

Full production

N/A

$30.00

8 weeks

N/A

LM2733YEVAL

0.6/1.6 MHz Boost Converters With 40V Internal FET Switch in SOT-23

Full production

N/A

$30.00

8 weeks

N/A

LM2733XMF

SOT-23

NOPB
STD

1
1

260
260

RoHS

Download

Full production

N/A

1K+

$1.04

reel
of
1000

S52A
XTT

8 weeks

2000

LM2733YMF

SOT-23

NOPB
STD

1
1

260
260

RoHS

Download

Full production

N/A

1K+

$1.04

reel
of
1000

S52B
XTT

6 weeks

2000

LM2733XMFX

SOT-23

NOPB

260

RoHS

Download

Full production

N/A

1K+

$1.04

reel
of
3000

S52A
XTT

6 weeks

7500

LM2733YMFX

SOT-23

NOPB
STD

1
1

260
260

RoHS

Download

Full production

N/A

1K+

$1.04

reel
of
3000

S52B
XTT

6 weeks

7500

General Description

The LM2733 switching regulators are current-mode boost converters operating fixed frequency of 1.6 MHz (“X” option) and 600 kHz (“Y” option).

The use of SOT-23 package, made possible by the minimal power loss of the internal 1A switch, and use of small inductors and capacitors result in the industry's highest power density. The 40V internal switch makes these solutions perfect for boosting to voltages of 16V or greater.

These parts have a logic-level shutdown pin that can be used to reduce quiescent current and extend battery life.

Protection is provided through cycle-by-cycle current limiting and thermal shutdown. Internal compensation simplifies design and reduces component count.

Switch Frequency

X	Y
1.6 MHz	0.6 MHz

Reliability Metrics

Part Number	Process	EFR Sample Size	LTA Device Hours	FITS	MTTF (Hours)
LM2733XMF	ABCD150	34175	4234000	1	1201409060
LM2733XMFX	ABCD150	34175	4234000	1	1201409060
LM2733YMF	ABCD150	34175	4234000	1	1201409060
LM2733YMFX	ABCD150	34175	4234000	1	1201409060

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.

Design Tools

Title	Size in Kbytes	Date
Article - Your Walls Will Be Changing			View

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Application Notes

Title	Size in Kbytes	Date
AN-1280: Application Note 1280 LM2731/LM2733 Evaluation Board	55 Kbytes	18-Apr-03	Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.

More Application Notes

Title	Size in Kbytes	Date
AN-1973: Application Note 1973 Benefits and Challenges of High-Frequency Regulators	348 Kbytes	25-Jun-09	Download
AN-1408: Application Note 1408 Designing Power Over Ethernet Using LM5070 and DP83865	1072 Kbytes	10-Jan-06	Download
AN-1408 (Chinese): Application Note 1408 Designing Power Over Ethernet Using LM5070 and DP83865	697 Kbytes
AN-1837: Application Note 1837 LM2738 Evaluation Board	799 Kbytes	10-Apr-08	Download
AN-1658: Application Note 1658 LM2735 BOOST and SEPIC DC-DCRegulator	408 Kbytes	26-Jun-07	Download
AN-1658 (Japanese): Application Note 1658 LM2735 BOOST and SEPIC DC-DCRegulator	620 Kbytes
AN-1658 (Chinese): Application Note 1658 LM2735 BOOST and SEPIC DC-DCRegulator	405 Kbytes
AN-1350: Application Note 1350 LM2734 Evaluation Board	639 Kbytes	4-Feb-05	Download
AN-1418: Application Note 1418 LM2736 Evaluation Board	858 Kbytes	26-Oct-05	Download
AN-1418 (Chinese): Application Note 1418 LM2736 Evaluation Board	279 Kbytes

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[Information as of 7-Nov-2009]