PWM Controllers
  • SC418
    • DC-DC Buck PWM Controller with Programmable LDO
  • SC419
    • Single Phase DC-DC Converter with Integrated Boost Diode
  • SC454
    • Single-Phase Single Chip IMVP-6/6+ Vcore Power Supply
  • SC493
    • Step-down Controller with I2C Interface
  • 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 SC471

Semtech SC471

Synchronous Buck Controller with Multi-Level VOUT Transition Support

The SC471/A is a versatile, constant on-time synchronous buck, pseudo-fixed-frequency, PWM controller intended for notebook computers and other battery operated portable devices.

Features


  • VOUT Programmable 0.75V to 5.25V with Integrated Transition Support
  • VBAT Range 3V to 25V
  • Soft Shutoff at Output
  • Current Sense Using Low-side RDS(ON) or Resistor Sensing
  • Adjustable Cycle-by-Cycle Valley Current Limit
  • 325kHz Fixed-Frequency
  • Constant On-Time for Fast Dynamic Response and Reduced Output Capacitance
  • Automatic Smart Power Save (patent pending)
  • Internal Soft-Start
  • Over-Voltage/Under-Voltage Fault Protection
  • Power Good Output with Transition Blanking
  • 1μA Typical Shutdown Current
  • 500μA Typical Operating Current
  • Tiny 3×3mm, 16 Pin MLPQ Package
  • Low External Part Count
  • Industrial Temperature Range
  • 0.85% Internal Reference
  • 1A/3A Non-Overlapping Gate Drive with SmartDriver™ Technology
  • High Efficiency > 90%
  • This Product is Fully WEEE and RoHS Compliant

Applications


  • Notebook/Sub-Notebook Graphics Voltage Controllers
  • Tablet PCs
  • Embedded Applications

Packaging

MLPQ-16

Order Codes

  • SC471MLTRT: Lead-free, RoHS and WEEE compliant, 3000 pcs. Tape & Reel