Overview
The FAN3100TMPX is a high-speed, low-side gate driver from onsemi, designed to drive N-channel enhancement-mode MOSFETs in low-side switching applications. This driver is part of the FAN3100 series and is specifically configured with TTL input thresholds. It provides high peak current pulses during short switching intervals, making it ideal for high-frequency power converter designs. The FAN3100TMPX incorporates MillerDrive™ architecture, a bipolar-MOSFET combination that minimizes switching loss and ensures rail-to-rail voltage swing and reverse current capability.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Range (VDD) | 4.5 | 18.0 | V | |
| Peak Sink/Source Current at VDD = 12 V | 3 A | A | ||
| Sink Current at VOUT = 6 V | 2.5 A | A | ||
| Source Current at VOUT = 6 V | 1.8 A | A | ||
| Rise Time (Typical) with 1 nF Load | 13 ns | ns | ||
| Fall Time (Typical) with 1 nF Load | 9 ns | ns | ||
| Propagation Delay Time (Typical) | < 20 ns | ns | ||
| Operating Temperature Range | -40°C | 125°C | °C | |
| Package Options | 6-Lead MLP, 5-Pin SOT23 |
Key Features
- Dual inputs configurable as non-inverting or inverting with enable function
- Internal resistors to bias inputs and hold output low if unconnected
- MillerDrive™ architecture for high peak current during MOSFET switching
- Rail-to-rail voltage swing and reverse current capability
- Under-voltage lockout (UVLO) function to ensure safe operation
- Lead-free finish, available in 2x2 mm 6-lead MLP and 5-pin SOT23 packages
- Rated from -40°C to 125°C ambient temperature
Applications
- Switch-mode power supplies (SMPS)
- High-efficiency MOSFET switching
- Synchronous rectifier circuits
- DC-to-DC converters
- Motor control
Q & A
- What is the primary function of the FAN3100TMPX gate driver?
The FAN3100TMPX is designed to drive N-channel enhancement-mode MOSFETs in low-side switching applications, providing high peak current pulses during short switching intervals. - What are the input threshold options for the FAN3100 series?
The FAN3100 series is available with either TTL (FAN3100T) or CMOS (FAN3100C) input thresholds. - What is the MillerDrive™ architecture and its benefits?
The MillerDrive™ architecture is a bipolar-MOSFET combination that provides high peak current during the Miller plateau stage of MOSFET switching, minimizing switching loss and ensuring rail-to-rail voltage swing and reverse current capability. - How can the dual inputs of the FAN3100TMPX be configured?
The dual inputs can be configured to operate in non-inverting or inverting mode and allow the implementation of an enable function. - What happens if the inputs are left unconnected?
If one or both inputs are left unconnected, internal resistors bias the inputs such that the output is pulled low to hold the power MOSFET off. - What is the operating temperature range of the FAN3100TMPX?
The FAN3100TMPX operates over a temperature range of -40°C to 125°C. - What are the package options for the FAN3100TMPX?
The FAN3100TMPX is available in a 2x2 mm 6-lead Molded Leadless Package (MLP) and a 5-pin SOT23 package. - What is the purpose of the under-voltage lockout (UVLO) function?
The UVLO function holds the output low until the supply voltage is within the operating range, ensuring safe operation. - What are some typical applications of the FAN3100TMPX?
Typical applications include switch-mode power supplies (SMPS), high-efficiency MOSFET switching, synchronous rectifier circuits, DC-to-DC converters, and motor control. - How does the FAN3100TMPX minimize switching loss?
The FAN3100TMPX minimizes switching loss through its MillerDrive™ architecture, which provides high peak current during the Miller plateau stage of MOSFET switching.
