Features • 550mA, 0.7, internal switch • Uses small surface mount components • Adjustable output voltage up to 20V • 2.2V to 7V input range • Input undervoltage lockout • 0.01µA shutdown current • Small 5-Lead SOT-23 package Description The LM2704 is a micropower step-up DC/DC in a small 5-lead SOT-23 package. A current limited, fixed off-time control scheme conserves operating current resulting in high efficiency over a wide range of load conditions. The 21V switch allows for output voltages as high as 20V. The low 400ns off-time permits the use of tiny, low profile inductors and capacitors to minimize footprint and cost in space-conscious portable applications. The LM2704 is ideal for LCD panels requiring low current and high efficiency as well as white LED applications for cellular phone back-lighting. The LM2704 can drive up to 8 white LEDs from a single Li-Ion battery. Applications • LCD Bias Supplies • White LED Back-Lighting • Handheld Devices • Digital Cameras • Portable Applications

Also Recommended LM2623 Operates With Input Voltages As Low As 0.8V LM2731 1.5A PWM Boost In SOT-23 LM3500▲ 400Ma Synchronous Boost. No External Diode LM3503▲ Soft Start, Over Voltage Protection On Output & Support For Single/dual Displays LM2703▲ 350mA Switch Current Limit 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

Datasheet

Title		Size	Date	Other Language
	LM2704 Micropower Step-up DC/DC Converter with 550mA Peak Current Limit	312 Kbytes	9-Apr-03	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-1250: Application Note 1250 Inductive Based Switching Regulator Circuits Provide High Efficiency White LED Drives	81 Kbytes	26-Sep-02
	AN-1277: Application Note 1277 LM2703/LM2704 Evaluation Board	26 Kbytes	6-Mar-03

More Application Notes

Title		Size	Date	Other Language
	AN-1308: Application Note 1308 LM2700 Evaluation Board	32 Kbytes	5-Jan-04
	AN-1237: Application Note 1237 RSDS™ Flat Panel Display Design Guidelines Part 2	141 Kbytes	14-May-03

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LM2704MF-ADJ/NOPB LM2704MF-ADJ RoHS	SOT-23	Full production Lead Time: 12 weeks	Distributor Region Qty ARROW Worldwide 1000 AVNET-EM Worldwide 2995 DIGIKEY Worldwide 5438 FUTURE Worldwide 1100 NEWARK Americas 820 RS COMPONENTS Worldwide 136	$0.90 each at 1K+ pcs	reel of 1000
LM2704MFX-ADJ/NOPB RoHS	SOT-23	Lifetime buy Lead Time: 12 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$0.90 each at 1K+ pcs	reel of 3000

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM2704-ADJ MDC	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM2704-ADJ MWC	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM2704MFX-ADJ	NONE	NATIONAL SEMICONDUCTOR	01 Dec 2009

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM2704MF-ADJ	ABCD150	0	34175	0	0	4234000	1	1201409060
LM2704MFX-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.

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Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM2704-ADJ MDC	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM2704-ADJ MWC	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM2704MFX-ADJ	NONE	NATIONAL SEMICONDUCTOR	01 Dec 2009