MAX1848

PRODUCTION

White LED Step-Up Converter in SOT23

Current Regulated Step-Up Converter Powers White LEDs with Uniform Brightness

Data Sheet (Rev. 2) Product Selection Table
Part Models
2
1ku List Price
Starting From $1.73
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Part Details

  • Constant Current Regulation for Uniform Illumination
  • High 87% Efficiency
  • Analog or Logic Control of LED Intensity
  • 0.8W Output Power with Internal High-Voltage MOSFET Switch
  • Small, Low-Profile External Components
  • 2.6V to 5.5V Input Range
  • 13V Maximum Output with Overvoltage Protection
  • Optimized for Low Input Ripple
  • Programmable Soft-Start
  • 0.3µA Shutdown Current
  • Small 8-pin Thin QFN (3mm x 3mm) and 8-Pin SOT23 Packages
MAX1848
White LED Step-Up Converter in SOT23
MAX1848: Typical Application Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Design Note 2

Technical Articles 10

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Hardware Ecosystem

Parts Product Life Cycle Description
Step-Up (Boost) LED Drivers 1
MAX1698
PRODUCTION High-Efficiency Step-Up Current Regulator for LEDs
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Evaluation Kits

MAX1848EVKIT

Evaluation Kit for the MAX1848

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Features and Benefits

  • >87% Efficiency
  • 2.6V to 5.5V Input Voltage Range
  • Analog LED Intensity Control
  • Drives Up to Three Series White LEDs with Uniform Brightness
  • Small, Low-Profile External Components
  • 0.3µA IC Shutdown Current (typ)
  • 1.2MHz Switching Frequency
  • 8-Pin SOT23 Package
  • Fully Assembled and Tested

    • Product Details

    The MAX1848 evaluation kit (EV kit) is a fully assembled and tested circuit board that contains a step-up switching-regulator current source powering three series-connected white LEDs. The circuit provides programmable LED current. The EV kit can be powered from a 2.6VDC to 5.5VDC source.

    The MAX1848 features programmable soft-start and LED brightness control. The MAX1848 EV kit demonstrates matching LED brightness with high converter efficiency (87%) to maximize battery life. Operation at 1.2MHz allows the use of tiny surface-mount components.

    Applications

    • Cell Phones
    • Consumer Audio
    • Digital Still Cameras
    • LCD Displays and Panels
    • Palmtops, Handy Terminals
    • Pen Entry Palmtops, PDAs and Organizers
    • Point-of-Sale Terminals
    MAX1848EVKIT
    Evaluation Kit for the MAX1848

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