FAN311/FAN3121/FAN3122 High Speed, Low-Side Gate Drivers

FAN3111/FAN3121/FAN3122
Single 1A & 9A High Speed, Low-Side Gate Drivers

Fairchild Semiconductor expands its family of high-speed, low-side gate drivers with the addition of the single 1A and 9A drivers. These drivers enable higher density, higher efficiency and more reliable power supplies. With the addition of single 1A and 9A drivers to the previously released single 2A, dual 2A and dual 4A drivers, this family now offers superior performance, size and design flexibility for switch-mode power-supply (SMPS) designs, synchronous rectifiers, pulse transformer drivers and motor control circuits.

The FAN3111 series provides a strong 1A gate drive in a small five-pin SOT-23 package and is designed to drive an N-channel enhancement-mode MOSFET in low-side switching applications.

The new FAN3121/22 9A driver series provides solutions for driving large loads with over 10A of peak gate drive current. These drivers are designed to drive N-channel enhancement MOSFETs in low-side switching applications by providing high peak current pulses.

FAN3111 Series
Features	Applications
1.4A peak sink/source at V_DD = 12V 1.1A sink/0.9A source at V_OUT = 6V 4.5 to 18V operating range Two input configurations 15ns typical delay times 9ns typical rise/8ns typical fall times with 470pF load 5-pin SOT23 package Rated from -40°C to 125°C ambient	Switch-mode power supplies Synchronous rectifier circuits Pulse transformer driver Logic to power buffer Motor control Datasheet

FAN3121 / FAN3122 Series
Features	Applications
Industry-standard pin-out with enable input 4.5 to 18V operating range 11.4A peak sink at V_DD = 12V 9.7A sink/7.1A source at V_OUT = 6V Internal resistors turn driver off if no inputs 23ns/19ns typical rise/fall times with 10nF load 20ns typical propagation delay time MillerDrive™ Technology Rated from -40°C to +125°C	Synchronous rectifier circuits High-efficiency MOSFET switching Switch-mode power supplies DC-to-DC converters Motor control Datasheet