FAN3111 Datasheet, PDF (1/18 Pages) Fairchild Semiconductor – Single 1A High-Speed, Low-Side Gate Driver

April 2009
FAN3111 — Single 1A High-Speed, Low-Side
Gate Driver
Features
ƒ 1.4A Peak Sink / Source at VDD = 12V
ƒ 1.1A Sink / 0.9A Source at VOUT = 6V
ƒ 4.5 to 18V Operating Range
ƒ FAN3111C Compatible with FAN3100C Footprint
ƒ Two Input Configurations:
− Dual CMOS Inputs Allow Configuration as
Non-Inverting or Inverting with Enable Function
− Single Non-Inverting, Low-Voltage Input for
Compatibility with Low-Voltage Controllers
ƒ Small Footprint Facilitates Distributed Drivers for
Parallel Power Devices
ƒ 15ns Typical Delay Times
ƒ 9ns Typical Rise / 8ns Typical Fall times with
470pF Load
ƒ 5-Pin SOT23 Package
ƒ Rated from –40°C to 125°C Ambient
Description
The FAN3111 1A gate driver is designed to drive an N-
channel enhancement-mode MOSFET in low-side
switching applications.
Two input options are offered: FAN3111C has dual
CMOS inputs with thresholds referenced to VDD for use
with PWM controllers and other input-signal sources
that operate from the same supply voltage as the driver.
For use with low-voltage controllers and other input-
signal sources that operate from a lower supply voltage
than the driver, that supply voltage may also be used as
the reference for the input thresholds of the FAN3111E.
This driver has a single, non-inverting, low-voltage input
plus a DC input VXREF for an external reference voltage
in the range 2 to 5V.
The FAN3111 is available in a lead-free finish industry-
standard 5-pin SOT23.
Applications
ƒ Switch-Mode Power Supplies
ƒ Synchronous Rectifier Circuits
ƒ Pulse Transformer Driver
ƒ Logic to Power Buffer
ƒ Motor Control
Figure 1. FAN3111C (Top View)
© 2008 Fairchild Semiconductor Corporation
FAN3111 • Rev. 1.0.1
Figure 2. FAN3111E (Top View)
www.fairchildsemi.com