Features • 1.9A, 0.2, internal switch (typical) • Operating voltage as low as 2.2V • 600kHz/1.25MHz adjustable frequency operation • Switchers Made Simple® software • 8-Lead MSOP package Description The LM2698 is a general purpose PWM boost converter. The 1.9A, 18V, 0.2ohm internal switch enables the LM2698 to provide efficient power conversion to outputs ranging from 2.2V to 17V. It can operate with input voltages as low as 2.2V and as high as 12V. Current-mode architecture provides superior line and load regulation and simple frequency compensation over the device's 2.2V to 12V input voltage range. The LM2698 sets the standard in power density and is capable of supplying 12V at 400mA from a 5V input. The LM2698 can also be used in flyback or SEPIC topologies. The LM2698 SIMPLE SWITCHER® features a pin selectable switching frequency of either 600kHz or 1.25MHz. This promotes flexibility in component selection and filtering techniques. A shutdown pin is available to suspend the device and decrease the quiescent current to 5µA. 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 insure a quick, easy and guaranteed design. The LM2698 is available in a low profile 8-lead MSOP package. Applications • 3.3V to 5V, 5V to 12V conversion • Distributed Power • Set-Top Boxes • DSL Modems • Diagnostic Medical Instrumentation • Boost Converters • Flyback Converters • SEPIC Converters

LM2698   2.20 <= V in Lower  V   <= V in Upper  V   <= 12.00 V out 2.20 <=  V <= 17.00 I out    A <= 1.35 Ambient Temperature  °C <= 100 What are WEBENCH® tools? Also Recommended LM2621▲ 2.85A Switch, Constant Duty Cycle Converter LM2623▲ 2.2A (A Grade) Versatile Low Cost Converter. 0.8V Minimum Input LM5000▲ 2A 80V Integrated Switch With Wider Input Voltage Range (3.1V To 40V) LM2700 3.6A Switch High Frequency (600KHz, 1.25MHz) PWM Converter MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application click for larger image	Block Diagram click for larger image
Typical Performance click for larger image

Datasheets

Title		Size	Date	Other Language
	LM2698 SIMPLE SWITCHER® 1.35A Boost Regulator	941 Kbytes	25-Mar-05

Featured Application Notes

Title		Size	Date	Other Language
	AN-1202: Application Note 1202 LM2698 Demoboard	217 Kbytes	10-May-04

More Application Notes

Title		Size	Date	Other Language
	AN-1444: Application Note 1444 LM2695 Evaluation Board	716 Kbytes	15-Feb-06
	AN-1472: Application Note 1472 LM2694 Evaluation Board	796 Kbytes	16-May-06
	AN-1410: Application Note 1410 LM2696 Demonstration Board	566 Kbytes	14-Aug-06	中文

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LM2698MM-ADJ/NOPB LM2698MM-ADJ RoHS Status	MINI SOIC	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 4730 AVNET-EM Worldwide 2000 DIGIKEY Worldwide 940 FUTURE Worldwide 970 NEWARK Americas 174 RS COMPONENTS Worldwide 6	$1.83 each at 1K+ pcs	reel of 1000
LM2698MMX-ADJ/NOPB LM2698MMX-ADJ RoHS Status	MINI SOIC	Full production Lead Time: 8 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$1.83 each at 1K+ pcs	reel of 3500

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

Part Number(s) (NSID)	Top View	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM2698MM-ADJ/NOPB LM2698MM-ADJ		MINI SOIC	8	1 1	260 260	Detail	Download	N/A	ZXTT S22B
LM2698MMX-ADJ/NOPB LM2698MMX-ADJ		MINI SOIC	8	1 1	260 260	Detail	Download	N/A	ZXTT S22B

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

Design Tools

Title	Size	Date
Power Reference Design Library

Reference Design

LM2698 Reference Design - 8x4 LED array, with PWM dimming

LM2698 Reference Design - Fully Isolated Forward Converter, 36-57V Input, 3.3V @ 2A & 1.8V @ 1A Dual Outputs

CAD Symbols and Models Download LM2698 CAD Symbols

Models N/A

LM2698   2.20 <= V in Lower  V   <= V in Upper  V   <= 12.00 V out 2.20 <=  V <= 17.00 I out    A <= 1.35 Ambient Temperature  °C <= 100 What are WEBENCH® tools?

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM2698MM-ADJ	ABCD150	0	34175	0	0	4234000	1	1201409060
LM2698MMX-ADJ	ABCD150	0	34175	0	0	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.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.