Features Three independent program execution engines; 9 programmable outputs with 25.5 mA full-scale current, 8-bit current setting resolution and 12-bit PWM control resolution Adaptive high efficiency 1x/1.5x fractional charge pump - efficiency up to 94% LED drive efficiency up to 93% Charge pump with soft start and overcurrent/short circuit protection Built-in LED test 200 nA typical standby current Automatic power save mode; IVDD = 10 µA (typ.) Two wire, I 2C-compatible, control interface Flexible instruction set Large SRAM program memory Small application circuit Source (high side) drivers Architecture supports color control. Description The LP5523 is a 9-channel LED driver designed to produce lighting effects for mobile devices. A high-efficiency charge pump enables LED driving over full Li-Ion battery voltage range. The device is equipped with an internal program memory, which allows operation without processor control. The LP5523 maintains excellent efficiency over a wide operating range by autonomously selecting the best charge pump gain based on LED forward voltage requirements. LP5523 is able to automatically enter power-save mode when LED outputs are not active, thus lowering idle current consumption down to 10 µA (typ). The LP5523 has an I 2C-compatible control interface with four pin selectable addresses. The device has a flexible General Purpose Output (GPO), which can be used as a digital control pin for other devices. INT pin can be used to notify processor when a lighting sequence has ended (interrupt -function). Also, the device has a trigger input interface, which allows synchronization, for example, between multiple LP5523 devices. The device requires only four small and low-cost ceramic capacitors. The LP5523 is available in a tiny 25–bump 2.27 mm x 2.27 mm x 0.60 mm micro SMD package (0.4 mm pitch). Notice: This document is not a full datasheet. For more information regarding this product or to order samples, please contact your local National Semiconductor sales office or visit http://www.national.com/support/dir.html. Applications Fun lights and indicator lights LED backlighting Haptic feedback Programmable current source

Typical Application

Typical Application click for larger image Typical Application	Connection Diagram click for larger image micro SMD-25 top view

Datasheets

Title		Size	Date	Other Language
	LP5523 Programmable LED Driver	167 Kbytes	16-Dec-09

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LP5523TM/NOPB RoHS Status	MICRO SMD	Full production Lead Time: 10 weeks	Distributor Region Qty AVNET-EM Worldwide 399 DIGI-KEY Worldwide 500 FARNELL Europe and Asia 360 KEIKONG Asia Pacific 1000 NEWARK Americas 360	$0.90 each at 1K+ pcs	reel of 250
LP5523TMX/NOPB RoHS Status	MICRO SMD	Full production Lead Time: 10 weeks	Distributor Region Qty DIGI-KEY Worldwide 0 MOUSER Worldwide 3000	$0.90 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 LP5523.

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 LP5523 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
LP5523TM/NOPB	6.528	MICRO SMD	25	1	260	Detail	N/A	N/A	XYTT I 5523
LP5523TMX/NOPB	6.528	MICRO SMD	25	1	260	Detail	N/A	N/A	XYTT I 5523

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 LP5523.

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 LP5523 is located at RoHS Status.

CAD Symbols and Models N/A

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LP5523TM	CMOS7	0	21301	0	0	1584000	3	449464325
LP5523TMX	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 LP5523.

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 LP5523 is located at RoHS Status.