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Semtech SC483
Dual Synchronous Buck Pseudo-Fixed-Frequency Power-Supply Controller
Not Recommended for New Designs - Last Day of purchase: 5/1/11
概览
功能
- Constant on-time for fast dynamic response
- Programmable VOUT range = 0.5 – VCCA
- VBAT range = 1.8 V – 25 V
- DC current sense using low-side RDS(ON) sensing or sense resistor
- Resistor-programmable frequency
- Cycle-by-cycle current limit
- Digital soft-start
- Separate PSAVE option for each switcher
- Over-voltage/Under-voltage fault protection
- 10 µA typical shutdown current
- Low quiescent power dissipation
- Two power-good indicators
- 1% reference over full temperature range (2% system DC accuracy)
- Integrated gate drivers with soft switching
- Separate enables
- 28-lead TSSOP
- Industrial temperature range
- Output soft discharge upon shutdown
应用
- Notebook computers
- CPT I/O supplies
- Handheld terminals and PDAs
- LCD monitors
- Network power supplies
封装
TSSOP-28
订购代码
- SC483ITSTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
图表和规格
框图
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