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 SC480

Semtech SC480

Complete DDR1/2/3 Memory Power Supply

The SC480 is a combination switching regulator and linear source/sink regulator intended for DDR1/2/3 memory systems.

Features


  • Constant on-time controller for fast dynamic response on VDDQ
  • DDR1/DDR2/DDR3 compatible
  • VDDQ = fi xed 1.8V or 2.5V, or adjustable from 1.5V to 3.0V
  • 1% internal reference (2% system accuracy)
  • Resistor programmable on-time for VDDQ
  • VCCA/VDDP range = 4.5V to 5.5V
  • VIN range = 2.5V to 25V
  • VDDQ DC current sense using low-side RDS(ON) Sensing or external RSENSE in series with low-side FET
  • Cycle-by-cycle current limit for VDDQ
  • Digital soft-start for VDDQ
  • Analog soft-start for VTT/REF
  • Smart over-voltage VDDQ protection against source-current loads
  • Combined EN and PSAVE pin for VDDQ
  • Over-voltage/under-voltage fault protection
  • Power good output
  • Separate VCCA and VDDP supplies
  • VTT/REF range = 0.75V – 1.5V
  • VTT source/sink 3A peak
  • Internal resistor divider for VTT/REF
  • VTT is high impedance in S3
  • VDDQ, VTT, REF are actively discharged in S4/S5
  • 24 lead MLPQ (4x4 mm) lead-free package
  • Fully WEEE and RoHS Compliant

Applications


  • Notebook computers
  • CPU I/O supplies
  • Handheld terminals and PDAs
  • LCD monitors
  • Network power supplies

Packaging

MLPQ-24

Order Codes

  • SC480IMLTRT: Lead-free, RoHS and WEEE compliant, 3000 pcs. Tape & Reel