PWM Controllers
  • SC2604
    • Simple Boost PWM Controller with Input Disconnect FET Drive
  • SC415
    • Dual Synchronous Buck PWM Controller
  • 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
  • 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 SC1486A

Semtech SC1486A

Dual Synchronous Buck Pseudo Fixed Frequency DDR Power Supply Controller

The SC1486A is a dual output constant on-time synchronous buck PWM controller optimized for cost effective mobile DDR1, DDR2 and DDR3 applications.

Features

  • 1% DC accuracy
  • Compatible with DDR1, DDR2 and DDR3 memory power requirements
  • Constant on-time for fast dynamic response
  • VBAT range = 1.8V – 25V
  • DC current sense using low-side RDS(ON) sensing or sense resistor
  • Integrated reference buffer for VTT
  • Low power S3 state with high-Z VTT
  • Resistor programmable on-time
  • Cycle-by-cycle current limit
  • Digital soft-start
  • PSAVE option for VDDQ
  • Over-voltage/under-voltage fault protection
  • <20μA shutdown current
  • Low quiescent power dissipation
  • Two Power Good indicators
  • Separate enable for each switcher
  • Integrated gate drivers with soft switching - no gate resistors required
  • Efficiency >90%
  • 28 Lead TSSOP (Lead-free available, fully WEEE and RoHS compliant)

Applications

  • Notebook computers
  • CPU I/O supplies
  • Handheld terminals and PDAs

Packaging

TSSOP-28

Order Codes

  • SC1486AITSTR: Package Minimum Tape & Reel Only
  • SC1486AITSTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only