SNVS500C July   2007  – November 2016 LP5524

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 LED Driver Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 LED
      2. 7.3.2 LED Headroom Voltage
      3. 7.3.3 LED Outputs
      4. 7.3.4 PWM Brightness Control
    4. 7.4 Device Functional Modes
      1. 7.4.1 Enable Mode
      2. 7.4.2 ISET Pin
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Recommended External Components
          1. 8.2.2.1.1 Input Capacitor, CIN
          2. 8.2.2.1.2 Current Set Resistor, RISET
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • 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 high-side 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 factory-programmable 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.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
LP5524 DSBGA (9) 1.21 mm × 1.21 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

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Simplified Schematic

LP5524 30007601.gif