MAX1573

White LED 1x/1.5x Charge Pump in UCSP and Thin QFN

Smallest, Highest Efficiency White LED Charge Pump Packaged in a UCSP™


Please check latest availability status for a specific part variant.

Description

The MAX1573 fractional charge pump drives up to four white LEDs with regulated constant current for uniform intensity. By utilizing proprietary adaptive 1x/1.5x modes and ultra-low-dropout current regulators, it maintains the highest possible efficiency over the full 1-cell Li+ battery input voltage range. The 1MHz fixed-frequency switching allows for tiny external components and the regulation scheme is optimized to ensure low EMI and low input ripple.

An external resistor sets the full-scale LED current, while two digital inputs control on/off and select amongst three levels of brightness. A pulse-width modulation (PWM) signal can also be used to modulate LED brightness, requiring no additional components.

The MAX1573 is available in the tiny chip-scale UCSP™ (4 x 4 grid) and 16-pin thin QFN packages.
MAX1573: Typical Operating Circuit MAX1573: Typical Operating Circuit Enlarge+

Key Features

  • Proprietary Adaptive 1x/1.5x Modes
  • High Efficiency (PLEDs/PBATT), Up to 92%
  • 0.2% LED Current Matching
  • 28mA/LED Drive Capability
  • Low Input Ripple and EMI
  • Eliminates Ballast Resistors
  • Logic or PWM Dimming Control
  • Low 0.1µA Shutdown Current
  • 2.7V to 5.5V Input Voltage Range
  • Soft-Start Limits Inrush Current
  • Output Overvoltage Protection
  • Thermal Shutdown Protection
  • No External Schottky Diode Required
  • Tiny UCSP (2.1mm x 2.1mm x 0.6mm) and Thin QFN (4mm x 4mm) Packages

Applications/Uses

  • Cell Phones/Smartphones
  • MP3 Players
  • Other Handhelds with Color Displays
  • PDAs, Digital Cameras, and Camcorders
Part NumberBattery InputRegulation TopologyMax. No. of LEDsLED ChannelsLED ConfigurationILED per Channel
(A)
PWM Dimming Freq.
(kHz)
Dimming ControlPOUT
(W)
VIN
(V)
VIN
(V)
ICC
(mA)
LED String Volt.
(V)
Oper. Freq.
(kHz)
Package/PinsBudgetary
Price
maxmaxminmaxmaxmaxSee Notes
MAX1573 1-Cell Li+Charge Pump44Parallel0.02850
Digital
PWM
0.52.75.5451000
TQFN/16
UCSP (B)/16
$1.93 @1k
See All LED Drivers (79)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX1573EVKIT: Evaluation Kit for the MAX1573

Technical Documents

App Note 3287 White-LED Driver Provides 64-Step Logarithmic Dimming
App Note 3243 White-LED Boost Converter vs. Charge Pump

Quality and Environmental Data

Product Reliability Reports: MAX1573.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX1573EBE-T
  • MAX1573ETE
  • MAX1573ETE+
  • MAX1573ETE+T
  • MAX1573ETE-T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >

     
    Status:
    Package:
    Temperature:

    Related Resources


    MAX20056B
    Integrated, 6-Channel High-Brightness LED Driver with Very Wide PWM Dimming Ratio and Phase Shifting for Automotive Displays

    • Robust with Respect to EMC and Automotive Battery Transients
    • Spread-Spectrum Mode Reduces Emission at the Switching Frequency and its Harmonics
    • Phase-Shift Dimming of LED Strings

    MAX25612
    Automotive Synchronous High Voltage LED Controller

    • Integration Minimizes BOM and Cost
    • Simple to Optimize for Efficiency, Board Space, and Input Operating Range
    • Protection Features Increase System Reliability

    MAX25600
    Synchronous High Voltage 4 Switch Buck Boost LED Controller

    • Automotive Ready: AEC-Q100 Qualified
    • Integration Minimizes BOM for High-Brightness LED Driver, Saving Space and Reducing Cost
    • Wide Dimming Ratio allows High Contrast Ratio

    MAX25615EVKIT
    Evaluation Kit for the MAX25615

    • +4V to +16V Single Power-Supply Range
    • 7A Peak Sink Current
    • 3A Peak Source Current

    MAX25615
    7A Sink, 3A Source, 12ns, SOT23 MOSFET Drivers

    • Automotive Ready: AEC-Q100 Qualified
    • Independent Source and Sink Outputs
    • +4V to +15.5V Single Power-Supply Range

    MAX25611C
    Automotive High-Voltage, HB-LED Controller

    • Automotive Ready: AEC-Q100 Qualified
    • Integration Minimizes BOM for High-Brightness LED Driver
    • Flexible Application Configurations

    MAX25611B
    Automotive High-Voltage, HB-LED Controller

    • Automotive Ready: AEC-Q100 Qualified
    • Integration Minimizes BOM for High-Brightness LED Driver
    • Flexible Application Configurations

    MAX25611D
    Automotive High-Voltage, HB-LED Controller

    • Automotive Ready: AEC-Q100 Qualified
    • Integration Minimizes BOM for High-Brightness LED Driver
    • Flexible Application Configurations

    MAX25611A
    Automotive High-Voltage, HB-LED Controller

    • Automotive Ready: AEC-Q100 Qualified
    • Integration Minimizes BOM for High-Brightness LED Driver
    • Flexible Application Configurations

    MAX25610A
    Synchronous Buck and Buck Boost LED Driver / DC-DC Converter

    • Automotive Ready: AEC-Q100 Qualified
    • Integration Minimizes BOM to Save Space and Cost
    • Wide Dimming Ratio Allows High Contrast Ratio

    MAX25610B
    Synchronous Buck and Buck Boost LED Driver / DC-DC Converter

    • Automotive Ready: AEC-Q100 Qualified
    • Integration Minimizes BOM to Save Space and Cost
    • Wide Dimming Ratio Allows High Contrast Ratio

    MAX21610
    Automotive 16-Channel 100mA Local Dimming Backlight Driver with SPI Interface

    • High Integration
    • Robust and Low EMI
    • Relative Dimming Ratio Between Strings Up to 32768:1