Features • Efficiency up to 97% • 4V to 14V input voltage range • 1.5V to 5.0V adjustable output voltage • 0.1 Switch On Resistance • 300 kHz fixed frequency internal oscillator • 7 µA shutdown current • Patented current sensing for current mode control • Input undervoltage lockout • Output overvoltage shutdown protection • Output undervoltage shutdown protection • Adjustable soft-start • Adjustable PGOOD delay • Current limit and thermal shutdown Description The LM2653 switching regulator provides high efficient power conversion over a 100:1 load range (1.5A to 15 mA). This feature makes the LM2653 an ideal fit in battery-powered applications. Synchronous rectification is used to achieve up to 97% efficiency. At light loads, the LM2653 enters a low power hysteretic or "sleep" mode to keep the efficiency high. In many applications, the efficiency still exceeds 80% at 15 mA load. A shutdown pin is available to disable the LM2653 and reduce the supply current to 7µA. All the power, control, and drive functions are integrated within the ICs. The ICs contain patented current sensing circuity for current mode control. This feature eliminates the external current sensing resistor required by other current-mode DC-DC converters. The ICs have a 300 kHz fixed frequency internal oscillator. The high oscillator frequency allows the use of extremely small, low profile components. Protection features include thermal shutdown, input undervoltage lockout, adjustable soft-start, cycle by cycle current limit, output overvoltage and undervoltage protections. Applications • Webpad • Personal digital assistants (PDAs) • Computer peripherals • Battery-powered devices • Notebook computer video supply • Handheld scanners • GXM I/O and core voltage • High efficiency 5V conversion

LM2653   4.00 <= V in Lower  V   <= V in Upper  V   <= 14.00 V out 1.24 <=  V <= 14.00 I out    A <= 1.50 Ambient Temperature  °C <= 100 What are WEBENCH® tools? Also Recommended LM20242▲ 36V Vin 2A PWM Sync Buck Regulator LM20323▲ 36V Vin 3A PWM Sync Buck Regulator LM26001▲ Wider Operating Voltage Range, Programmable Frequency, Better Transient Response & Lower Iq Shutdown LM2852▲ 2A Synch Buck Regulator For Low Voltage Applications LM2854▲ 4A Synch Buck Regulator For Low Voltage Applications LM3100▲ 36V 1.5A Synchronous Buck Regulator LM2650▲ 3A Integrated Synchronous Regulator W/ Adj Frequency And Sync Pin 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
	LM2653 1.5A High Efficiency Synchronous Switching Regulator	665 Kbytes	14-Apr-05	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-1133: Application Note 1133 LM2653EVAL 1.5A Synchronous Switching Regulator Evaluation Board	76 Kbytes	4-Oct-04

More Application Notes

Title		Size	Date	Other Language
	AN-1143: Application Note 1143 LM2651_3.3V_EVAL 1.5A High Efficiency Synchronous Switching Regulator Evaluation Board	150 Kbytes	24-Jul-08
	AN-1147: Application Note 1147 LM2651_EVAL 1.5A High Efficiency Synchronous Switching Regulator Evaluation Board	149 Kbytes	2-Oct-07
	AN-1215: Application Note 1215 LM2655 2.5A Synchronous Switching Regulator Evaluation Board	307 Kbytes	10-May-04
	AN-1520: Application Note 1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages	2176 Kbytes	7-Sep-06	中文
	AN-1071: Application Note 1071 Information About the LM2650 Evaluation Board Rev. 1	105 Kbytes	4-Oct-04	日本語

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LM2653MTC-ADJ/NOPB LM2653MTC-ADJ RoHS Status	TSSOP	Full production Lead Time: 8 weeks	Distributor Region Qty ARROW Worldwide 92 AVNET-EM Worldwide 204 DIGIKEY Worldwide 230 FUTURE Worldwide 783 RS COMPONENTS Worldwide 1	$1.95 each at 1K+ pcs	rail of 92
LM2653MTCX-ADJ/NOPB LM2653MTCX-ADJ RoHS Status	TSSOP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$1.95 each at 1K+ pcs	reel of 2500

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
LM2653MTC-ADJ/NOPB LM2653MTC-ADJ		TSSOP	16	1 1	260 260	Detail	Download	N/A	NSZXYTT 2653MT C-ADJ
LM2653MTCX-ADJ/NOPB LM2653MTCX-ADJ		TSSOP	16	1 1	260 260	Detail	Download	N/A	NSZXYTT 2653MT C-ADJ

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.

CAD Symbols and Models Download LM2653 CAD Symbols

Models N/A

LM2653   4.00 <= V in Lower  V   <= V in Upper  V   <= 14.00 V out 1.24 <=  V <= 14.00 I out    A <= 1.50 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)
LM2653MTC-ADJ	ABCD150	0	34175	0	0	4234000	1	1201409060
LM2653MTCX-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.