LM5009A 100V, 150 mA Constant On-Time Buck Switching Regulator from the PowerWise® Family

Part Number(s) (NSID)	Top View	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM5009AMM/NOPB		MINI SOIC	8	1	260	Detail	Download	N/A	ZXTT SLLA
LM5009AMMX/NOPB		MINI SOIC	8	1	260	Detail	Download	N/A	ZXTT SLLA
LM5009ASD/NOPB		LLP	8	1	260	Detail	Download	N/A	NS UZXYTT 5009ASD
LM5009ASDX/NOPB		LLP	8	1	260	Detail	Download	N/A	NS UZXYTT 5009ASD

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Description

The LM5009A is a functional variant of the LM5009 COT Buck Switching Regulator. The functional differences of the LM5009A are: The minimum input operating voltage is 6 volts, the on-time equation is slightly different, and the requirement for a minimum load current is removed.

The LM5009A Step Down Switching Regulator features all of the functions needed to implement a low cost, efficient, Buck bias regulator. This high voltage regulator contains an 100 V N-Channel Buck Switch. The device is easy to implement and is provided in the MSOP-8 and the thermally enhanced LLP-8 packages. The regulator is based on a control scheme using an ON time inversely proportional to V_IN. This feature allows the operating frequency to remain relatively constant. The control scheme requires no loop compensation. An intelligent current limit is implemented with forced OFF time, which is inversely proportional to Vout. This scheme ensures short circuit control while providing minimum foldback. Other features include: Thermal Shutdown, V_CC under-voltage lockout, Gate drive under-voltage lockout, Max Duty Cycle limiter, and a pre-charge switch.

Features

Diagrams

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Typical Performance click for larger image