Switching Regulators
  • SC187
    • 4A, 2.2MHz Synchronous Step-Down Regulator with 15 Preset Output Voltages
  • SC220
    • 20MHz, 650mA, X-EMI™-Enabled Synchronous Step-Down Regulator
  • SC220Q
    • 20MHz, 650mA, X-EMI™-Enabled Synchronous Step-Down Regulator
  • SC2308A
    • 600kHz Step-Up Switching Regulator with 2.2A, 45V Switch
  • SC284
    • Dual Channel 2.5MHz, 1.8A Synchronous Step-Down Regulator
  • SC3102
    • 2A Synchronous Step-Down Regulator
  • SC401B
    • 15A Integrated FET Regulator with Programmable LDO
  • SC402B
    • 10A EcoSpeed® Integrated FET Regulator with Programmable LDO
Semtech SC197

Semtech SC197

3.5MHz, 500mA Synchronous Dual Step-Down DC-DC Regulator

The SC197 contains two identical high efficiency 500mA step-down regulators designed for use in battery-powered applications. Each regulator includes 15 programmable output voltage settings that can be selected using the four control pins, eliminating the need for external feedback resistors. The output voltage can be fixed to a single setting or dynamically switched between different levels. Pulling all four control pins low disables the output.

Features


  • Input Voltage — 2.9V to 5.5V
  • Output Voltage — 0.8V to 3.3V
  • Output current capability — 500mA per regulator
  • Efficiency up to 94%
  • Programmable output voltages — 15
  • High light-load efficiency via automatic PSAVE mode
  • Fast transient response
  • Oscillator frequency — 3.5MHz
  • 100% duty cycle capability
  • Quiescent current — 38μA typical per regulator
  • Shutdown current — 0.1μA typical per regulator
  • Internal soft-start
  • Over-voltage protection
  • Current limit and short circuit protection
  • Over-temperature protection
  • Under-voltage lockout
  • Floating control pin protection
  • MLPQ-UT18 2.0 x 3.0 x 0.6 (mm) package
  • Lead-free, halogen-free, and RoHS/WEEE compliant

Applications


  • Smart phones and cellular phones
  • MP3/Personal media players
  • Personal navigation devices
  • Digital cameras
  • Single Li-ion cell or 3 NiMH/NiCd cell devices
  • Devices with 3.3V or 5V internal power rails

Packaging

MLPQ-UT18 2.0 x 3.0 x 0.6 (mm)

Order Codes

SC197ULTRT: MLPQ-UT18 2 x 3
SC197EVB: Evaluation Board