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SC1205 Datasheet(PDF) 1 Page - Semtech Corporation |
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SC1205 Datasheet(HTML) 1 Page - Semtech Corporation |
1 / 12 page POWER MANAGEMENT 1 www.semtech.com SC1205 High Speed Synchronous Power MOSFET Driver Features Applications Revision: September 22, 2004 Description The SC1205 is a cost effective Dual MOSFET Driver de- signed for switching High and Low side Power MOSFETs. Each driver is capable of driving a 3000pF load in 20ns max rise/fall time and has a 20ns max propagation de- lay from input transition to the gate of the power FET’s. An internal Overlap Protection circuit prevents shoot- through from Vin to GND in the main and synchronous MOSFET’s. The Adaptive Overlap Protection circuit en- sures the Bottom FET does not turn on until the Top FET source has reached a voltage low enough to prevent cross-conduction. The high current drive capability (3A peak) allows fast switching, thus reducing switching losses at high (up to 1MHz) frequencies without overheating the driver. The high voltage CMOS process allows operation from 5-25 Volts at top MOSFET drain, thus making SC1205 suit- able for battery powered applications. Connecting En- able pin (EN) to logic low shuts down both drives and reduces operating current to less than 10uA. An Under-Voltage-Lock-Out circuit is included to guaran- tee that both driver outputs are low when the 5V logic level is less than or equal to 4.4V (typ) at supply ramp up (4.35V at supply ramp down). An Internal temperature sensor shuts down all drives in the event of overtemperature. SC1205 is fabricated utilizing Bi-CMOS technology for low quiescent current. The SC1205 is of- fered in a standard SO-8 package. Fast rise and fall times (15ns typical with 3000pf load) 3 Amp peak drive current 14ns max Propagation delay (BG going low) Adaptive Non-overlapping Gate Drives provide shoot-through protection Floating top drive switches up to 25V Under-Voltage lock-out Overtemperature protection Less than 10µA supply current when EN is low Low cost High Density sunchronous power supplies Motor Drives/Class-D amps/Half bridge drivers High frequency (to 1.2 MHz) operation allows use of small inductors and low cost caps in place of electrolytics High efficiency portable computers Battery powered applications Typical Application Circuit Vcore, 1.7v,40A +5V Vin 5-12V Rf Rref Ri 10nf 2.5m 10 SC2422A 12 9 2 3 1 13 7 5 6 11 14 4 10 15 16 8 OUT2 GND VID3 VID2 VID4 OUT1 FB VID0 ERROUT OC- OC+ VID1 UVLO BGOUT VCC RREF 70N03 SC1205 CO TG DRN VS EN BG SC1205 CO TG DRN VS EN BG 10u,CER 2200uf 70N03 70N03 70N03 |
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