LM3503ITLX-25/NOPB

Voltage - Output:	25V
Base Part Number:	LM3503
Supplier Device Package:	10-TµSMD (1.9x2.07)
Package / Case:	10-WFBGA, DSBGA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Applications:	Backlight
Dimming:	Analog, PWM
Frequency:	1MHz
Current - Output / Channel:	600mA (Switch)
Series:	--
Voltage - Supply (Max):	5.5V
Voltage - Supply (Min):	2.5V
Number of Outputs:	2
Internal Switch(s):	Yes
Topology:	Step-Up (Boost)
Type:	DC DC Regulator
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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The LM3503ITLX-25/NOPB is a type of Pulse Width Modulation (PWM) current regulator, more commonly known as a Power Management Integrated Circuit (PMIC). Specifically, it is an LED (Light Emitting Diode) driver. It is part of the National Semiconductor Corporation\'s (NSC) family of high-performance and low power devices, and is rated for a wide range of voltage applications.This PMIC-LED driver was designed to provide a high level of performance, while consuming minimal power. It provides precise and programmable LED current regulation by using a combination of a Pulse Width Modulation (PWM) current mode, as well as a dimming algorithm. This dimming algorithm is beneficial in providing controlled LED current regulation, which allows more efficient operation. Additionally, the LM3503ITLX-25/NOPB is equipped with circuitry to disable external (non-LED) drivers, allowing for the resolution of "ghost current" issues that can cause instability.Moreover, the LM3503ITLX-25/NOPB is rated for use with voltage supply levels in the range of 4.5V to 18V, and can withstand output current levels up to 25mA. In addition, it has a temperature operating range of -40°C to +85°C, and a provided minimum on/off switching period of 2.4 microseconds.The LM3503ITLX-25/NOPB\'s working principle is based around a switching PWM current regulator. It is capable of controlling multiple current signals in a single chip; each signal vector can be individually programmed for specific current regulation thanks to the multiple current registers available on board.In addition, the output voltage of the device is determined by the programmed external current control resistor. Specifically, the exact output voltage of the device is equal to the "VOUT" setting that can be adjusted using the RSET pin. Furthermore, the resistance value of the external current control resistor can be adjusted through the programming of "ISET" registers.Essentially, the LM3503ITLX-25/NOPB is powered via a regulated voltage supply. Upon power-up, the chip performs an internal self-initialization, and then waits for the programmed values to be loaded via an external serial interface. This chip then controls a power switch depending on the programmed configuration, as well as the external voltage and load current values. When the LED current is detected to be below the predetermined threshold level, the device activates the power switch until the LED current reaches the programmed level.All in all, the LM3503ITLX-25/NOPB PMIC-LED driver is the perfect solution for applications requiring precise and programmable LED current regulation. With its wide voltage rating range, as well as its temperature operating range, users can rest assured knowing that the device will operate reliably in any condition.

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