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 SC470

Semtech SC470

Synchronous Buck Power Supply Controller for Dynamic Load-Voltage Applications

The SC470 is a single output, constant on-time synchronous-buck, pseudo-fixed frequency, PWM controller intended for use in notebook computers and other battery operated portable devices. Features include high efficiency and fast dynamic response with no minimum on-time.

Features


  • Constant on-time for fast dynamic response
  • Programmable VOUT range = 0.5 – VCCA
  • VBAT range = 1.8V – 25V
  • DC current sense using low-side RDS(ON) sensing or RSENSE in source of low-side MOSFET for greater accuracy
  • Resistor programmable on-time
  • Cycle-by-cycle current limit
  • Digital soft-start
  • Combined EN and PSAVE functions
  • Over-voltage/under-voltage fault protection
  • and PGD output
  • 20% OVP threshold for simpler dynamic voltage transition circuitry
  • 5µA typical shutdown current
  • Low quiescent power dissipation
  • Industrial temperature range
  • 0.85% DC accuracy
  • Integrated gate drivers with soft-switching
  • 14 lead TSSOP and 16 pin MLPQ (4mm x 4mm) packages

Applications


  • Graphics Cards
  • Embedded Graphics Processors
  • High Performance Processors

Packaging

MLPQ-16, TSSOP-14

Order Codes

  • SC470IMLTRT: Lead-free, RoHS and WEEE compliant, 2500 pcs. Tape & Reel (MLPQ-16)
  • SC470ITSTRT: Lead-free, RoHS and WEEE compliant, 2500 pcs. Tape & Reel (TSSOP-14)