Date: 27/10/2009

Synchronous Buck MOSFET drivers from Microchip with high latch-up immunity

Microchip has announced that the MCP14628 and MCP14700 synchronous Buck MOSFET drivers drive two N-Channel MOSFETs arranged in a non-isolated, synchronous Buck converter topology. These MOSFET drivers feature high latch-up immunity for products such as digital power conversion, DC-to-DC power supplies, three-phase BLDC motor control and telecom equipment.

The MCP14628 MOSFET driver includes an enhanced light-load efficiency mode that conserves energy when the power supply is not in full use. The dual-input MCP14700 driver is suitable for controllers that utilize 3.0V TTL/CMOS logic, and can control the high and low sides independently, which optimizes the timing between the two sides and further maximizes efficiency. Additionally, the MCP14700 driver's timing can be adjusted to a wide range of external MOSFETs, giving designers more flexibility to use different types of MOSFETs in their applications.

The key features of the MCP14628 MOSFET driver are,
Adaptive cross conduction protection
High Capacitive load drive Capability: 3000 pF in 8.0 ns (typ)
Low supply current: 80 uA (typ)
High peak output current: Source 2.0A (UGATE & LGATE) Sink 2.0A (UGATE) & 4A (LGATE)
Internal bootstrap blocking device
Supports floating high side drive

The key features of the MCP14700 MOSFET driver are,

Independent PWM input control for high side and low side gate drive
Inputs are dsPIC compatible
High capacitive load drive Capability: 3300 pF in 10.0 ns (typ)
Low supply current: 80 uA (typ)
High peak output current: Source 2.0A (UGATE & LGATE) Sink 2.0A (UGATE) & 4A (LGATE)
Internal bootstrap blocking device
Supports floating high side drive

Package: Small 8-pin SOIC and 3 mm x 3 mm DFN packages

Price:
MCP14628: Each $1.17 for 10k pieces
MCP14700: Each $1.33 for 10k pieces
Availability: Samples can be ordered today

For more details visit www.microchip.com

Editorial Product Rating: Average