FAN3121 Datasheet | Fairchild Semiconductor

FAN3121 / FAN3122 - Single 9A High-Speed, Low-Side Gate Driver .. September 2008 FAN3121 / FAN3122 Single 9A High-Speed, Low-Side Gate Driver Features - - - - - - - - - - - - Industry-Standard Pin-out with Enable Input 4.5 to 18V Operating Range 11.4A Peak Sink at VDD = 12V 9.7A Sink / 7.1A Source at VOUT = 6V Inverting Configuration (FAN3121) and Non-Inverting Configuration (FAN3122) Internal Resistors Turn Driver Off If No Inputs 23ns/19ns Typical Rise/Fall Times with 10n F Load 20ns Typical Propagation Delay Time Choice of TTL or CMOS Input Thresholds Miller Drive™ Technology Available in Thermally Enhanced 3x3mm 8-Lead MLP or 8-Lead SOIC Package (Pb-Free Finish) Rated from - 40°C to +125°C Description The FAN3121 and FAN3122 MOSFET drivers are designed to drive N-channel enhancement MOSFETs in low-side switching applications by providing high peak current pulses. The drivers are available with either TTL (FAN312x T) or CMOS (FAN312x C) input thresholds. Internal circuitry provides an under-voltage lockout function by holding the output low until the supply voltage is within the operating range. FAN312x drivers incorporate the Miller Drive™ architecture for the final output stage. This bipolar / MOSFET bination provides the highest peak current during the Miller plateau stage of the MOSFET turn-on / turn-off process. The FAN3121 and FAN3122 drivers implement an enable function on pin 3 (EN), previously unused in the industry-standard pin-out. The pin is internally pulled up to VDD for active HIGH logic and can be left open for standard operation. The FAN3121/22 is available in a 3x3mm 8-lead thermallyenhanced MLP package or an 8-lead SOIC package. Applications - - - - - Synchronous Rectifier Circuits High-Efficiency MOSFET Switching Switch-Mode Power Supplies DC-to-DC Converters Motor Control VDD 1 IN EN 2 3 8 7 6 5 VDD OUT OUT GND VDD 1 IN EN 2 3 8 VDD 7 OUT 6 OUT 5 GND GND 4 GND 4 Figure 1. FAN3121 Pin Configuration Figure...