LM2736 Thin SOT23 750mA Load Step-Down DC-DC Regulator

Part Number(s) (NSID)	Top View	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM2736XMK/NOPB LM2736XMK		TSOT	6	1 1	260 260	Detail	Download	N/A	SHAB XTT
LM2736XMKX/NOPB LM2736XMKX		TSOT	6	1 1	260 260	Detail	Download	N/A	SHAB XTT
LM2736YMK/NOPB LM2736YMK		TSOT	6	1 1	260 260	Detail	Download	N/A	SHBB XTT
LM2736YMKX/NOPB LM2736YMKX		TSOT	6	1 1	260 260	Detail	Download	N/A	SHBB XTT

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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

•	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

Diagrams

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