Features Fully interchangeable with standard LM3524 family ±1% precision 5V reference with thermal shut-down Output current to 200 mA DC 60V output capability Wide common mode input range for error-amp One pulse per period (noise suppression) Improved max. duty cycle at high frequencies Double pulse suppression Synchronize through pin 3 Description The LM3524D family is an improved version of the industry standard LM3524. It has improved specifications and additional features yet is pin for pin compatible with existing 3524 families. New features reduce the need for additional external circuitry often required in the original version. The LM3524D has a ±1% precision 5V reference. The current carrying capability of the output drive transistors has been raised to 200 mA while reducing VCEsat and increasing VCE breakdown to 60V. The common mode voltage range of the error-amp has been raised to 5.5V to eliminate the need for a resistive divider from the 5V reference. In the LM3524D the circuit bias line has been isolated from the shut-down pin. This prevents the oscillator pulse amplitude and frequency from being disturbed by shut-down. Also at high frequencies (≃300 kHz) the max. duty cycle per output has been improved to 44% compared to 35% max. duty cycle in other 3524s. In addition, the LM3524D can now be synchronized externally, through pin 3. Also a latch has been added to insure one pulse per period even in noisy environments. The LM3524D includes double pulse suppression logic that insures when a shut-down condition is removed the state of the T-flip-flop will change only after the first clock pulse has arrived. This feature prevents the same output from being pulsed twice in a row, thus reducing the possibility of core saturation in push-pull designs.

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

Datasheets

Title		Size	Date	Other Language
	LM3524D Regulating Pulse Width Modulator	1078 Kbytes	2-May-08	日本語

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM3524DM/NOPB LM3524DM RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 369 AVNET-EM Worldwide 95 DIGI-KEY Worldwide 1041 MOUSER Worldwide 689 NEWARK Americas 36 RS COMPONENTS Worldwide 120 TAYLOR Americas 369	$0.53 each at 1K+ pcs	rail of 48
LM3524DMX/NOPB LM3524DMX RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 7500 AVNET-EM Worldwide 2500 DIGI-KEY Worldwide 0 TAYLOR Americas 7500	$0.53 each at 1K+ pcs	reel of 2500
LM3524DN/NOPB LM3524DN RoHS Status	MDIP	Full production Lead Time: 6 weeks	Distributor Region Qty AVNET-EM Worldwide 943 BRITESTONE South Korea 3 DIGI-KEY Worldwide 376 FARNELL Europe and Asia 451 MOUSER Worldwide 550 RS COMPONENTS Worldwide 200 TAYLOR Americas 35	$0.66 each at 1K+ pcs	rail of 25

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM3524D.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM3524D is located at RoHS Status.

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM3524DM/NOPB LM3524DM	139.49 140	SOIC NARROW	16	1 1	260 235	Detail	N/A	N/A	NSUZXYTTE# LM3524DM
LM3524DMX/NOPB LM3524DMX	139.49 140	SOIC NARROW	16	1 1	260 235	Detail	N/A	N/A	NSUZXYTTE# LM3524DM
LM3524DN/NOPB LM3524DN	1066.291 1070.001	MDIP	16	1 1	NA NA	Detail	N/A	N/A	NSUZXYYTTE# LM3524DN

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM3524D.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM3524D is located at RoHS Status.

CAD Symbols and Models N/A

Models N/A