1. FAN3180 Single 2-A Gate Driver with 3.3-V 15-mA LDO
Gate Driver with LDO for MCU Power
March, 2013

2. FAN3180: Single 2-A Driver + 3.3-V LDO
Applications
Gate Drive with Power for the MCU
Switched-Mode Power Supplies, Consumer Electronics, Portable Hand Tools
LDO
3.3-V, 15-mA Output
±1% at 25oC, ±2.5% Total Variation
Gate Driver
+2.8-A Peak Drive Current at VDD = 12 V
+2.4-A/-1.8-A at VOUT = 6 V
23-ns Typical Prop. Delay Times
19-ns tF / 13-ns tR with 1nF Load
MillerDrive™ Gate Drive Technology
General
5-V to 18-V Operating Range
Controlled Startup and Shutdown
VON, VOFF UVLO of 4.75 V and 4.55 V
200-µA Maximum Total Static Current
5-Pin SOT-23 Package
–40oC to 125oC Operation
Many applications use a combination of a microcontroller (MCU) and a gate driver.
In these configurations, an external low-dropout regulator (LDO) is needed to power the MCU.
The FAN3180 integrates a 3.3-V output voltage regulator to power the microcontroller or ASICs.

3. FAN3180: Controlled Startup and Shutdown
Edge-trigger operation: Output switching only begins after the first VALID rising edge of the input signal (prevents incomplete output pulse at startup and re-startup)
Controlled Shutdown
When VDD is removed and falls below UVLOOFF, the output immediately terminates regardless of the VIN signal state.
VDD Applied when VIN = HIGH
Turn Off During VIN = HIGH

4. FAN3180: Transitioning from Existing Designs
Many applications use a gate driver (such as FAN3100) with an external LDO to power a microcontroller (MCU)
Designs can transition to the FAN3180 easily saving component count, board space, design time, and cost.
For FAN3100TSX designs, four of the five pins are the same as FAN3180. The IN- input (pin 4 on the FAN3100) has been replaced with 3V3 LDO output on the FAN3180.
The two diagrams show typical application examples of both the FAN3100 and FAN3180 designs powering a microcontroller.
FAN3100 LS Driver and an External LDO
FAN3180 with Integrated LDO

5. Fairchild’s High-Speed Low-Side Gate Driver Family
Type
Configuration
Part Num
In. Thres.
Packages
Released
Single 1A
Dual Input (CMOS); Non-Inv (Ext)
FAN3111
CMOS, Ext
SOT23-5
Yes
Single 2A
Dual Input (+ & -)
FAN3100
CMOS, TTL
SOT23-5, MLP-6
Single Non-Inverting, 3V3 LDO
FAN3180
TTL
Dual 2A
Dual Inverting
FAN3216
SOIC-8
Dual Non-Inverting
FAN3217
Dual Inverting + Dual Enable
FAN3226
SOIC-8, MLP-8
Dual Non-Inverting + Dual Enable
FAN3227
FAN3229
Dual 4A
FAN3213
FAN3214
FAN3223
FAN3224
FAN3225
Single 9A
Single Inverting + Enable
FAN3121
Single Non-Inverting + Enable
FAN3122
Bridge 2A
20V Bridge Driver + Dual Enables
FAN3268
30V Bridge Driver + Dual Enables
FAN3278
FAN3180 is part of Fairchild’s comprehensive High-Speed Low-Side Gate Driver family.
CMOS = VDD Ratio Thresholds (Approximately 38% and 55%).
Ext = Thresholds proportional to an external reference voltage.

6. twitter.com/fairchildSemi