1 Features

1• Wide Input Voltage Range: 2.7 V to 5.5 V

• High-Side LED Driver

• Drives Four LEDs With up to 25 mA per LED

• 0.4% Typical Current Matching

• PWM Brightness Control

• Overcurrent Protection

• Fast Transient Response

• Optional External ISET Resistor

• Ultra-Small Solution Size:

– No External Components

– 9-Pin DSBGA Package with 0.4-mm pitch:

– 1.24 mm × 1.24 mm × 0.6 mm (L × W × H,

maximum)

2 Applications

• Sub-Display Backlight

• Keypad LED Backlight

• Indicator LED

3 Description

The LP5524 device is a highly integrated dual-zone

LED driver that can drive up to four LEDs in parallel

with a total output current of 100 mA. Regulated highside

internal current sources deliver excellent current

and brightness matching in all LEDs.

The LP5524 provides overcurrent protection and

pulse-width modulation (PWM) control of four

indicator LEDs without the need for external

components.

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 factoryprogrammable

and an optional external resistor can

be used to set LED current to user programmable

values.

The LP5524 is available in a tiny, 9-pin, thin DSBGA

package.