MIC4685 Series

200kHz 3A SuperSwitcher™ Buck Regulator

Catalog

200kHz 3A SuperSwitcher™ Buck Regulator

Part	Package Leads	Package Name	Voltage - Output (Min/Fixed)	Number of Outputs	Operating Temperature (Max)	Operating Temperature (Min)	Voltage - Output (Max)	Synchronous Rectifier	Current - Output	Mounting Type	Voltage - Input (Min)	Frequency - Switching	Output Type	Output Configuration	Topology	Function	Voltage - Input (Max)
Microchip Technology MIC4685BR TR	7 Leads	7-SPAK SPAK-7	1.235 V	1	125 °C	-40 °C	28.2 V	No	3 A	Surface Mount	4 V	200 kHz	Adjustable	Positive	Buck	Step-Down	30 V p-p
Microchip Technology MIC4685-5.0BR	7 Leads	7-SPAK SPAK-7	5 V	1	125 °C	-40 °C		No	3 A	Surface Mount	4 V	200 kHz	Fixed	Positive	Buck	Step-Down	30 V p-p
Microchip Technology MIC4685WR	7 Leads	7-SPAK SPAK-7	1.235 V	1	125 °C	-40 °C	28.2 V	No	3 A	Surface Mount	4 V	200 kHz	Adjustable	Positive	Buck	Step-Down	30 V p-p
Microchip Technology MIC4685BR	7 Leads	7-SPAK SPAK-7	1.235 V	1	125 °C	-40 °C	28.2 V	No	3 A	Surface Mount	4 V	200 kHz	Adjustable	Positive	Buck	Step-Down	30 V p-p
Microchip Technology MIC4685WR-TR	7 Leads	7-SPAK SPAK-7	1.235 V	1	125 °C	-40 °C	28.2 V	No	3 A	Surface Mount	4 V	200 kHz	Adjustable	Positive	Buck	Step-Down	30 V p-p
Microchip Technology MIC4685-5.0BR TR	7 Leads	7-SPAK SPAK-7	5 V	1	125 °C	-40 °C		No	3 A	Surface Mount	4 V	200 kHz	Fixed	Positive	Buck	Step-Down	30 V p-p

Catalog

200kHz 3A SuperSwitcher™ Buck Regulator

Description

The MIC4685 is a high-efficiency 200kHz stepdown (buck) switching regulator. Power conversion efficiency of above 85% is easily obtainable for a wide variety of applications. The MIC4685 achieves 3A of continuous current in the 7-lead SPAK package. The thermal performance of the SPAK allows it to replace TO-220s and TO-263s (D2 PAKs) in many applications. The SPAK saves board space with a 36% smaller footprint than TO-263. High efficiency is maintained over a wide output current range by utilizing a boost capacitor to increase the voltage available to saturate the internal power switch. As a result of this high efficiency, only the ground plane of the PCB is needed for a heat sink. The MIC4685 allows for a high degree of safety. It has a wide input voltage range of 4V to 30V (34V transient), allowing it to be used in applications where input voltage transients may be present. Built-in safety features include over-current protection, frequency-foldback short-circuit protection, and thermal shutdown. The MIC4685 is available in an 7-lead SPAK package with a junction temperature range of -40°C to +125°C.