LM3477
Description
The LM3477/A is a high-side N-channel MOSFET switching regulator controller. It can be used in topologies requiring a high side MOSFET such as buck, inverting (buck-boost) and zeta regulators. The LM3477/A’s internal push pull driver allows patibility with a wide range of MOSFETs. This, the wide input voltage range, use of discrete power ponents and adjustable current limit allows the LM3477/A to be optimized for a wide variety of applications. The LM3477/A uses a high switching frequency of 500k Hz to reduce the overall solution size. Current-mode control requires only a single resistor and capacitor for frequency pensation. The current mode architecture also yields superior line and load regulation and cycle-by-cycle current limiting. A 5µA shutdown state can be used for power savings and for power supply sequencing. Other features include internal soft-start and output over voltage protection. The internal soft-start reduces inrush current. Over voltage protection is a...
