Features • Thin SOT23-6 package • 3.0V to 18V input voltage range • 1.25V to 16V output voltage range • 750mA output current • 550kHz (LM2736Y) and 1.6MHz (LM2736X) switching frequencies • 350m NMOS switch • 30nA shutdown current • 1.25V, 2% internal voltage reference • Internal soft-start • Current-Mode, PWM operation • WEBENCH®™ online design tool • Thermal shutdown Description The LM2736 regulator is a monolithic, high frequency, PWM step-down DC/DC converter in a 6-pin Thin SOT23 package. It provides all the active functions to provide local DC/DC conversion with fast transient response and accurate regulation in the smallest possible PCB area. With a minimum of external components and online design support through WEBENCH®™, the LM2736 is easy to use. The ability to drive 750mA loads with an internal 350m NMOS switch using state-of-the-art 0.5µm BiCMOS technology results in the best power density available. The world class control circuitry allows for on-times as low as 13ns, thus supporting exceptionally high frequency conversion over the entire 3V to 18V input operating range down to the minimum output voltage of 1.25V. Switching frequency is internally set to 550kHz (LM2736Y) or 1.6MHz (LM2736X), allowing the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequencies are very high, efficiencies up to 90% are easy to achieve. External shutdown is included, featuring an ultra-low stand-by current of 30nA. The LM2736 utilizes current-mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start circuitry to reduce inrush current, pulse-by-pulse current limit, thermal shutdown, and output over-voltage protection. Applications • Local Point of Load Regulation • Core Power in HDDs • Set-Top Boxes • Battery Powered Devices • USB Powered Devices • DSL Modems • Notebook Computers

LM2736X   3.00 <= V in Lower  V   <= V in Upper  V   <= 18.00 V out 1.25 <=  V <= 16.00 I out    A <= 0.75 Ambient Temperature  °C <= 100 What are WEBENCH® tools? Also Recommended LM2734▲ 1A Output Current, Wider Vin Range, Vout Down To 0.8V LM5010▲ 1A Output Current, Up To 80V Vin 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
	LM2736 Thin SOT23 750mA Load Step-Down DC-DC Regulator	828 Kbytes	1-Feb-05	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-1418: Application Note 1418 LM2736 Evaluation Board	858 Kbytes	26-Oct-05	中文

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Design Tools

Reference Design

RD-136 - LM5020 Reference Design - Dual Output Flyback Converter with isolated outputs of 5V@0.2A and 12V@2.1A. Two LM2736Y's provide an additional output of 3.3V@0.5A and 5V@0.5A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM2736XMK	PVIP050	0	9960	0	0	855000	5	242608584
LM2736XMKX	PVIP050	0	9960	0	0	855000	5	242608584
LM2736YMK	PVIP050	0	9960	0	0	855000	5	242608584
LM2736YMKX	PVIP050	0	9960	0	0	855000	5	242608584

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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