Switching Regulators
  • SC4525D
    • 18V, 3A, 350kHz Step-Down Switching Regulator
  • SC4525C
    • 28V 3A Step-Down Switching Regulator
  • SC4524D
    • 18V 2A Step-Down Switching Regulator
  • SC4524C
    • 28V 2A Step-Down Switching Regulator
  • SC427
    • 10A EcoSpeed® Integrated FET Regulator with Programmable LDO
  • SC417
    • 10A EcoSpeed® Integrated FET Regulator with Programmable LDO
  • SC410
    • 3A, 24V EcoSpeed® Step-Down Regulator with LDO and Ultrasonic Power Save
  • SC403B
    • 6A EcoSpeed® Integrated FET Regulator with Programmable LDO
Semtech SC121

Semtech SC121

Low Voltage Synchronous Boost Regulator

The SC121 is a high efficiency, low noise, synchronous step-up DC-DC converter that provides boosted voltage levels in low-voltage handheld applications. The wide input voltage range allows use in systems with single NiMH or alkaline battery cells as well as in systems with higher voltage battery supplies.

Features


  • Input voltage — 0.7V to 4.5V
  • Minimum start-up voltage — 0.85V
  • Output voltage — fixed at 3.3V; adjustable from 1.8V to 5.0V
  • Peak input current limit — 1.2A
  • Output current at 3.3 VOUT — 80mA with VIN = 1.0V,
  • 190mA with VIN = 1.5V
  • Forced PWM operation at all loads
  • Efficiency up to 94%
  • Internal synchronous rectifier
  • No forward conduction path during shutdown
  • Switching frequency — 1.2MHz
  • Soft-start startup current limiting
  • Shutdown current — 0.1μA (typ)
  • Ultra-thin 1.5 x 2.0 x 0.6 (mm) MLPD-UT-6 package
  • Lead-free and halogen-free
  • WEEE and RoHS compliant

Applications


  • MP3 players
  • Smart phones and cellular phones
  • Palmtop computers and handheld instruments
  • PCMCIA cards and memory cards
  • Digital cordless phones
  • Personal medical products
  • Wireless VoIP phones
  • Small motors

Packaging

  • MLPD-UT-6

Order Codes

  • SC121ULTRT