FAN8303 Series

Step-Down DC-DC Regulator, Non-Synchronous, 2 A, 23 V

Catalog

Step-Down DC-DC Regulator, Non-Synchronous, 2 A, 23 V

Part	Number of Outputs	Current - Output	Package / Case	Package / Case [y]	Package / Case [x]	Function	Output Configuration	Voltage - Input (Max) [Max]	Mounting Type	Supplier Device Package	Synchronous Rectifier	Voltage - Input (Min) [Min]	Voltage - Output (Min/Fixed)	Topology	Operating Temperature [Max]	Operating Temperature [Min]	Output Type	Voltage - Output (Max) [Max]	Frequency - Switching
ON Semiconductor FAN8303MX	1	2 A	8-SOIC	3.9 mm	0.154 in	Step-Down	Positive	23 V	Surface Mount	8-SOIC		5 V	0.6 V	Buck	85 °C	-40 °C	Adjustable	20 V	370 kHz

Catalog

Step-Down DC-DC Regulator, Non-Synchronous, 2 A, 23 V

Key Features

• 2 A Output Current

• 0.22 Ω Internal Power MOSFET Switch

• Wide 5 V to 23 V Operating Input Range

• Output Adjustable from 0.6 to 20 V

• Stable with Low ESR Output Ceramic Capacitors

• Up to 90% Efficiency

• Less than 40 µA Shutdown Current

• Fixed 370 kHz Frequency

• Thermal Shutdown with Hysteresis

• Cycle-by-Cycle Over-Current Protection

Description

The FAN8303 is a monolithic, non-synchronous, stepdown (buck) regulator with internal power MOSFETs. It achieves 2 A continuous output current over a wide input supply range with excellent load and line regulation. Current-mode operation provides fast transient response and eases loop stabilization. Fault condition protection includes cycle-by-cycle current limiting and thermal shutdown. The regulator draws less than 40 µA shutdown current. FAN8303 requires a minimum number of readily available standard external components.External compensation, enable, and programmable soft-start features allow design optimization and flexibility. Cycle-by-cycle current limit, frequency foldback, and thermal shutdown provide protection against shorted outputs.