Features High side LED driver Drives 4 LEDs with Up to 25mA per LED Ultra-Small Solution Size: No External Components Micro SMD-9 Package with 0.4 mm pitch: 1.215mm x 1.215mm x 0.6mm (LxWxH) 0.4% Typical Current Matching PWM Brightness Control Over-Current Protection Wide Input Voltage Range: 2.7V to 5.5V Description The LP5524 is a highly integrated dual-zone LED driver that can drive up to four LEDs in parallel with a total output current of 100mA. Regulated high side internal current sources deliver excellent current and brightness matching in all LEDs. LED driver current sources are split into two independently controlled banks for driving secondary displays, keypad and indicator LEDs. Brightness control is achieved by applying PWM signals to each enable pin. Default LED current is factory-programmable and an optional external resistor can be used to set LED current to user programmable values. LP5524 is available in National’s tiny 9-bump thin micro SMD package. Applications Sub display Backlight Keypad LED Backlight Indicator LED

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

Parameters Values Regulated LEDs 4 LED Configuration Parallel Current Matching 0.5% Total LED Current 100 mA Input Min Voltage 2.7 Volt Input Max Voltage 5.5 Volt PWM BrightCtrl Yes Analog-V BrightCtrl No Ambient Light Compensation No RGB-LED No Temperature Min -40 deg C Temperature Max 85 deg C RegType Lighting Management Unit PowerWise No

Datasheets

Title		Size	Date	Other Language
	LP5524 Parallel LED Driver with PWM Brightness Control in Micro SMD Package	223 Kbytes	19-Jul-07

Application Notes

Title		Size	Date	Other Language
	AN-1702: Application Note 1702 LP5524 Evaluation Kit	491 Kbytes	17-Mar-08

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LP5524TM-5/NOPB RoHS Status	MICRO SMD	Full production Lead Time: 6 weeks	Distributor Region Qty AVNET-EM Worldwide 649 DIGI-KEY Worldwide 1166 FARNELL Europe and Asia 255 NEWARK Americas 255 RS COMPONENTS Worldwide 220	$0.66 each at 1K+ pcs	reel of 250
LP5524TMX-5/NOPB RoHS Status	MICRO SMD	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0 MOUSER Worldwide 3500	$0.66 each at 1K+ pcs	reel of 3000

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 LP5524.

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 LP5524 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LP5524TM-5EV	Evaluation Board for the LP5524	Full production	Distributor Region Qty DIGI-KEY Worldwide 0 MOUSER Worldwide 1	$103.00 each	1
General Description: LP5524 Evaluation Kit enables designers an easy way to evaluate the performance of the device. The evaluation board has jumpers for each enable pin for easy on/off type control. These inputs can also be fed with external PWM source. Jumpers on LED outputs allow easy LED current measuring. ISET pin has a jumper for selecting between two LED current levels. The kit supports complete functional evaluation of the circuit. Contents: LP5524 Evaluation Board LP5524 Datasheet Application Note 1702 for LP5524 Evaluation Kit

National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

Lead Free product status is available through the search tool located here

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LP5524TM-5/NOPB	1.997	MICRO SMD	9	1	260	Detail	Download	N/A	XV I V2
LP5524TMX-5/NOPB	1.997	MICRO SMD	9	1	260	Detail	Download	N/A	XV I V2

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 LP5524.

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 LP5524 is located at RoHS Status.

CAD Symbols and Models Download LP5524 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LP5524TM-5	CMOS7	0	21301	0	0	1584000	3	449464325
LP5524TMX-5	CMOS7	0	21301	0	0	1584000	3	449464325

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.

For more information on Reliability Metrics, please click here.

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 LP5524.

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 LP5524 is located at RoHS Status.