FAN6520A

The FAN6520A makes simple work out of implementing  a complete control and protection scheme for a DC-DC
stepdown converter.

Designed to drive N-channel MOSFETs in a synchronous  buck topology, the FAN6520A integrates the control, output
adjustment, monitoring and protection functions into a single  8-lead package.

The FAN6520A is easy to use, employs a single feedback loop, and voltage-mode control with fast transient response. The output voltage can be precisely regulated to as low as  0.8V, with a maximum tolerance of ±1.5% over temperature  and line voltage variations. A fixed frequency oscillator  reduces design complexity, while balancing typical  application cost.  The error amplifier features a 15MHz gain- bandwidth product and an 8V/µs slew rate which enables  high converter bandwidth for fast transient performance. The resulting PWM duty cycles range from 0% to 100%.

The IC monitors the drop across the upper MOSFET and  inhibits PWM operation appropriately to protect against
over-current conditions. This approach simplifies the  implementation and improves efficiency by eliminating  the need for a current sense resistor.  

The FAN6520A is rated for operation from 0° to +70°C with  the FAN6520AI rated from 40° to +85°C.