Fairchild Fan3111C Data Handbook
Summary
The FAN3111 is a high-speed, single 1A low-side gate driver designed for robust MOSFET switching in diverse power applications. Featuring advanced input options—including dual CMOS inputs and external voltage referencing—it ensures reliable control across varying supply voltages (2V to 18V). This manual provides detailed technical specifications, operational guidelines, package details, and application guidance for engineers designing switch-mode power supplies, synchronous rectifiers, and motor control circuits.
Page 1 Text Content
3111 — in le 1A ig -S eed , L -S id e G ate D river
July 2012
FAN3111 — Single 1A High-Speed, Low-Side Gate Driver Features Description
1.4A Peak Sink / Source at VDD = 12V The FAN3111 1A gate driver is designed to drive an N- channel enhancement-mode MOSFET in low-side
1.1A Sink / 0.9A Source at VOUT = 6V
switching applications.
4.5 to 18V Operating Range
Two input options are offered: FAN3111C has dual FAN3111C Compatible with FAN3100C Footprint CMOS inputs with thresholds referenced to VDD for use with PWM controllers and other input-signal sources that
Two Input Configurations:
operate from the same supply voltage as the driver. For Dual CMOS Inputs Allow Configuration as use with low-voltage controllers and other input-signal sources that operate from a lower supply voltage than
Non-Inverting or Inverting with Enable Function
the driver, that supply voltage may also be used as the
Single Non-Inverting, Low-Voltage Input for
reference for the input thresholds of the FAN3111E.
Compatibility with Low-Voltage Controllers
This driver has a single, non-inverting, low-voltage input plus a DC input VXREF for an external reference voltage
Small Footprint Facilitates Distributed Drivers for
in the range 2 to 5V.
Parallel Power Devices
15ns Typical Delay Times The FAN3111 is available in a lead-free finish industry- standard 5-pin SOT23.
9ns Typical Rise / 8ns Typical Fall times with 470p F Load 5-Pin SOT23 Package Rated from –40°C to 125°C Ambient
Applications Switch-Mode Power Supplies Synchronous Rectifier Circuits Pulse Transformer Driver Logic to Power Buffer Motor Control
Figure 1. FAN3111C (Top View) Figure 2. FAN3111E (Top View)
© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN3111 • Rev. 1.0.3
Page Summary Contents For Fairchild Fan3111C Data Handbook
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 18 |
| File Size | 1.09 MB |
| Published | June 02, 2026 |
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Frequently Asked Questions
What is the operating range for the FAN3111 gate driver?
The device operates in a 4.5 to 18V voltage range.
Which models are suitable when using external reference voltages (XREF)?
The FAN3111E model includes an XREF pin and is designed for external reference voltages between 2V and 5V.
What are the typical switching speeds of this driver?
It offers a typical delay time of 15ns, with rise/fall times of 9ns (rise) and 8ns (fall) when driving a 470pF load.
How does the FAN3111C enable its output using dual CMOS inputs?
The FAN3111C allows configuration as non-inverting, inverting, or single active input by connecting the IN+ and IN– pins to VDD or GND.