MAX1570
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MAX1570

White LED Current Regulator with 1x/1.5x High-Efficiency Charge Pump

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $2.71
Features
  • Excellent 0.3% LED-to-LED Current Matching
  • 30mA/LED Drive Capability
  • Proprietary 1x/1.5x Modes for Ultra-High Efficiency
  • Low Input Ripple and EMI
  • Eliminates Ballast Resistors
  • Digital or PWM LED Dimming Control
  • 0.1µA Shutdown Current
  • 2.7V to 5.5V Supply Voltage Range
  • Soft-Start Limits Inrush Current
  • Thermal-Shutdown Protection
  • No External Inductor, Schottky, or Zener Diode Required
  • Tiny 16-Pin 4mm x 4mm Thin QFN Package
Additional Details
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The MAX1570 fractional charge pump drives up to five white LEDs with regulated constant current for uniform intensity. The MAX1570 maintains the highest possible efficiency over the full 1-cell lithium-ion (Li+) battery input voltage range by utilizing a 1x/1.5x fractional charge pump and very-low-dropout current regulators. The MAX1570 operates with 1MHz fixed-frequency switching, allowing for tiny external components. 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 between three levels of brightness. A pulse-width modulation (PWM) signal can also be used to modulate LED brightness.

The MAX1570 is available in 16-pin 4mm x 4mm Thin QFN packaging (0.8mm max height).

Applications

  • Cell Phones/Smartphones
  • Digital Cameras and Camcorders
  • PDAs and Palmtop Computers
  • Portable MP3 Players
  • White LED Backlighting
Part Models 2
1ku List Price Starting From $2.71

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX1570ETE+
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MAX1570ETE+T
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Product Lifecycle

PCN

Jun 20, 2016

- 1612

ASSEMBLY

MAX1570ETE+

PRODUCTION

MAX1570ETE+T

PRODUCTION

Filter by Model

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Part Models

Product Lifecycle

PCN

Jun 20, 2016

- 1612

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ASSEMBLY

MAX1570ETE+

PRODUCTION

MAX1570ETE+T

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX1570EVKIT

Evaluation Kit for the MAX1570

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MAX1570EVKIT

Evaluation Kit for the MAX1570

Evaluation Kit for the MAX1570

Features and Benefits

  • Excellent (0.3%) LED-to-LED Current Matching
  • 2.7V to 5.5V Input Range
  • 30mA/LED Drive Capability
  • Five LEDs at 150mA Total Current
  • 0.1µA (typ) IC Shutdown Current
  • Digital PWM LED Dimming Control
  • Fixed 1MHz Switching Frequency
  • Surface-Mount Component Construction
  • 16-Pin 4mm x 4mm Thin QFN Package
  • Fully Assembled and Tested

Product Detail

The MAX1570 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board. The EV kit contains the MAX1570, a white LED driver with high-efficiency charge pump. The EV kit accepts a 2.7V to 5.5V input and drives up to five white LEDs with regulated constant current for uniform intensity. The MAX1570 runs at 1MHz fixed frequency, allowing tiny external components.

Applications

  • Cell Phones/Smartphones
  • Digital Cameras and Camcorders
  • Portable MP3 Players
  • White LED Backlighting

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