June 2013
FAN3180
Single 2-A Low-Side Driver with 3.3-V LDO
Features
Description
LDO
The FAN3180 combines a high-speed low-side gate
driver with a 3.3-V output Low Drop Out (LDO)
regulator. The gate driver is rated to 2.8-A peak current
at VDD of 12 V and is designed to drive an N-channel
enhancement-mode MOSFET in low-side switching
applications. The FAN3180 also integrates a 3.3-V, 15-
mA LDO with tight voltage tolerance of ±1% at 25°C and
±2.5% of total variation for powering external
microcontrollers.
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3.3-V, 15-mA Output
±1% at 25°C, ±2.5% Total Variation
Gate Driver
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Peak 2.8-A Sink / 2.5-A Source at VDD = 12 V
Controlled Output Pulses at Startup and Shutdown
Non-Inverting Logic Configuration
TTL-Compatible Input Thresholds
Internal circuitry provides an Under-Voltage Lockout
(UVLO) function by holding the output low until the
supply voltage is within the operating range and the first
full input pulse is detected. The FAN3180 has UVLO
thresholds of 4.75-V VON and 4.55-V VOFF and a
maximum standby supply current of 200 µA.
23-ns Typical Delay Time
19-ns / 13-ns Rise and Fall Times with 1-nF Load
General
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-40°C to +125°C Operation Temperature
5-V to 18-V Operating Range
The driver delivers fast MOSFET switching performance
to maximize efficiency in high-frequency power
converter designs. It incorporates the MillerDrive™
architecture for the final output driver stage. This
bipolar-MOSFET combination provides high peak
current during the Miller plateau stage of the MOSFET
turn-on / turn-off process to minimize switching loss,
while providing rail-to-rail voltage swing and reverse-
current capability. Thermal shutdown function is
included as an additional safety feature.
VON / VOFF UVLO of 4.75 V / 4.55 V
200-µA Maximum Standby Supply Current
Lead (Pb)-Free Green 5-Pin SOT23 Package
Applications
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Gate Drive with Power for the MCU
Switched-Mode Power Supplies, Consumer
Electronics, Portable Hand Tools
VDD
Load
UVLO
1
2
3
5
VDD
GND
OUT
MCU
PWM
Input
LDO
4
IN+
3V3
Figure 1. Typical Application
© 2012 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN3180 • Rev. 1.0.3