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.
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- 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
- Graphics Cards
- Embedded Graphics Processors
- High Performance Processors
- 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)
