Charge Pumps
  • SC627
    • LED Light Management Unit with SemWire™ Interface
  • SC627A
    • LED Light Management Unit with I2C Interface
  • SC630
    • Fixed 3.3V High Output Charge Pump Buck/Boost Regulator
  • SC631
    • Fixed 4.4V Output Charge Pump Regulator
  • SC658
    • Backlight LED Driver for 4 LEDs with SemPulse™ Interface
  • SC657
    • Backlight LED Driver for 5 LEDs with SemPulse™ Interface
  • SC654
    • Light Management Unit for 6 LEDs with SemPulse™ Interface
  • SC652
    • Backlight LED Driver for 5 LEDs with Charge Pump and PWM Control
  • SC561
    • Dual Output Low Noise LDO Linear Regulator
  • SC810
    • Single Input/Single Mode Single-cell Li-ion Battery Charger
  • SCDAS4F
    • Standard Recovery, High Current Center Tap and Doubler Rectifier Assemblies
Semtech SC657

Semtech SC657

Backlight LED Driver for 5 LEDs with SemPulse™ Interface

The SC657 is a high efficiency charge pump LED driver using Semtech’s proprietary charge pump technology. Performance is optimized for use in single-cell Li-ion battery applications.

Features

  • Input supply voltage range — 2.9V to 5.5V
  • Very high efficiency charge pump driver system with three modes — 1x, 1.5x and 2x
  • Five programmable current sinks — 0mA to 25mA
  • Up to three LED grouping options
  • Fade-in/fade-out feature for main LED bank
  • Charge pump frequency — 250kHz
  • SemPulse single wire interface
  • Backlight current accuracy — ±1.5% typical
  • Backlight current matching — ±0.5% typical
  • LED float detection
  • Automatic sleep mode (LEDs off) — IQ = 60μA (typ.)
  • Shutdown current — 0.1μA (typical)
  • Ultra-thin package — 2 x 2 x 0.6 (mm)
  • Fully WEEE and RoHS compliant

Applications

  • Cellular phones, smart phones, and PDAs
  • LCD modules
  • Portable media players
  • Digital cameras
  • Personal navigation devices
  • Display/keypad backlighting and LED indicators

Packaging

MLPQ-UT-20 (3 X 3 mm)

Order Codes

  • SC657ULTRT: Lead-Free, WEEE and RoHS Compliant, 3000pcs Tape and Reel Only