FAN3121C − Single 9A High-Speed Low-Side Gate Driver

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 (FAN312xT) or CMOS (FAN312xC) 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 MillerDrive™ architecture for the final output stage. This bipolar / MOSFET combination 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 V_DD for active HIGH logic and can be left open for standard operation.

The FAN3121/22 is available in a 3x3mm 8-lead thermally-enhanced MLP package or an 8-lead SOIC package.

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Product Status/Pricing/Packaging

Index	Product	Product & Eco Status	*Pricing	Packaging & Packing Info	**Package Marking Convention	Qualification Support	Compliance Certificates
0	FAN3121CMPX	Full Production Green as of Oct 2008	$1.31	MLP 3x3 8L (Power 33) Details MLP 3x3 8L (Power 33) Drawing  TAPE REEL	Line 1:$Y (Fairchild logo) &Z (Plant Code) &2 (2-Digit Date Code) &K Line 2:3121C	ESD (HBM) :  2000  V Moisture Sensitivity Level (MSL) :  1   Max Reflow Temp :  260	RoHS IPC1752 RoHS/REACH/JIG RoHS/REACH/JIG
0	FAN3121CMX	Full Production ROHS Compliant	$1.2	SO 8L NB Details SO 8L NB Drawing  TAPE REEL	Line 1:$Y (Fairchild logo) &Z (Plant Code) &2 (2-Digit Date Code) &K Line 2:FAN3121C	ESD (HBM) :  2000  V Moisture Sensitivity Level (MSL) :  1   Max Reflow Temp :  260	RoHS IPC1752 RoHS/REACH/JIG RoHS/REACH/JIG

• Fairchild 1,000 piece Budgetary Pricing. *
• If there is no sample button displayed at the top of the page, please contact one of the Fairchild distributors or your local sales office to obtain samples.
• Top mark packaging information for product FAN3121C is available. **

Features

• Industry-Standard Pin-out with Enable Input
• 4.5 to 18 V Operating Range
• 11.4 A Peak Sink at V_DD = 12 V
• 9.7 A Sink / 7.1 A Source at V_OUT = 6 V
• Inverting Configuration (FAN3121) and Non-Inverting Configuration (FAN3122)
• Internal Resistors Turn Driver Off If No Inputs
• 23 ns / 19 ns Typical Rise/Fall Times with 10nF Load
• 20 ns Typical Propagation Delay Time
• Choice of TTL or CMOS Input Thresholds
• MillerDrive™ Technology
• Available in Thermally Enhanced 3x3mm 8-Lead MLP or 8-Lead SOIC Package (Pb-Free Finish)
• Rated from –40°C to +125°C

Applications

AC-DC Merchant Power Supply - Servers & Workstations

Application Notes