Data Sheet

June 2013
© 2012 Fairchild Semiconductor Corporation www.fairchildsemi.com
FAN3180 • Rev. 1.0.3
FAN3180 — Single 2-A Low-Side Driver with 3.3-V LDO
FAN3180
Single 2-A Low-Side Driver with 3.3-V LDO
Features
LDO
 3.3-V, 15-mA Output
 ±1% at 25°C, ±2.5% Total Variation
Gate Driver
 Peak 2.8-A Sink / 2.5-A Source at V
DD
= 12 V
 Controlled Output Pulses at Startup and Shutdown
 Non-Inverting Logic Configuration
 TTL-Compatible Input Thresholds
 23-ns Typical Delay Time
 19-ns / 13-ns Rise and Fall Times with 1-nF Load
General
 -40°C to +125°C Operation Temperature
 5-V to 18-V Operating Range
 V
ON
/ V
OFF
UVLO of 4.75 V / 4.55 V
 200-µA Maximum Standby Supply Current
 Lead (Pb)-Free Green 5-Pin SOT23 Package
Applications
 Gate Drive with Power for the MCU
 Switched-Mode Power Supplies, Consumer
Electronics, Portable Hand Tools
Description
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 V
DD
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.
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 V
ON
and 4.55-V V
OFF
and a
maximum standby supply current of 200 µA.
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.
3V3
V
DD
MCU
PWM
Input
Load
1
4
5
3
2
UVLO
LDO
OUT
IN+
GND
VDD
Figure 1. Typical Application