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.