LM2734 Thin SOT23 1A 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
LM2734XMK/NOPB		TSOT	6	1	260	Detail	Download	N/A	SFDB XTT
LM2734XQMK/NOPB		TSOT	6	1	260	Detail	Download	N/A	SUKB XTT
LM2734XQMKE/NOPB		TSOT	6	1	260	Detail	Download	N/A	SUKB XTT
LM2734XQMKX/NOPB		TSOT	6	1	260	Detail	Download	N/A	SUKB XTT
LM2734YMK/NOPB LM2734YMK		TSOT	6	1 1	260 260	Detail	Download	N/A	SFEB XTT
LM2734YMKX/NOPB LM2734YMKX		TSOT	6	1 1	260 260	Detail	Download	N/A	SFEB XTT
LM2734YQMK/NOPB		TSOT	6	1	260	Detail	Download	N/A	SVCB XTT
LM2734YQMKE/NOPB		TSOT	6	1	260	Detail	Download	N/A	SVCB XTT
LM2734YQMKX/NOPB		TSOT	6	1	260	Detail	Download	N/A	SVCB XTT

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Description

The LM2734 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 LM2734 is easy to use. The ability to drive 1A loads with an internal 300mΩ 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 20V input operating range down to the minimum output voltage of 0.8V. Switching frequency is internally set to 550kHz (LM2734Y) or 1.6MHz (LM2734X), 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 LM2734 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

Diagrams

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