MIC4690 Series

500KHz 1A SuperSwitcher™ Buck Regulator

Catalog

500KHz 1A SuperSwitcher™ Buck Regulator

Part	Frequency - Switching	Synchronous Rectifier	Supplier Device Package	Output Type	Number of Outputs	Mounting Type	Function	Package / Case	Package / Case [y]	Package / Case [x]	Voltage - Input (Min) [Min]	Voltage - Output (Max)	Current - Output	Voltage - Input (Max) [Max]	Operating Temperature [Min]	Operating Temperature [Max]	Output Configuration	Voltage - Output (Min/Fixed)	Topology
Microchip Technology MIC4690YM-TR	500 kHz		8-SOIC	Adjustable	1	Surface Mount	Step-Down	8-SOIC	3.9 mm	0.154 in	4 V	27.9 V	1 A	30 V	-40 °C	125 ¯C	Positive	1.23 V	Buck
Microchip Technology MIC4690BM	500 kHz		8-SOIC	Adjustable	1	Surface Mount	Step-Down	8-SOIC	3.9 mm	0.154 in	4 V	27.9 V	1 A	30 V	-40 °C	125 ¯C	Positive	1.23 V	Buck

Catalog

500KHz 1A SuperSwitcher™ Buck Regulator

Key Features

• + SO-8 package with over 1A output current

• + Fixed 500kHz operation

• + Wide 4V to 34Vinput voltage range

• + Output voltage adjustable to 1.23V

• + All surface mount solution

• + Internally compensated with fast transient response

• + Up to 85% efficiency

• + Overcurrent protection

• + Frequency foldback short-circuit protection

• + Thermal shutdown

Description

The MIC4690 SuperSwitcher™ is an easy-to-use, 500kHz step-down PWM voltage regulator. The MIC4690 achieves over 1A of continuous output current over a wide input voltage range in an 8-lead SO (small outline) package. The high switching frequency of the MIC4690 allows the smallest surface-mount inductors and capacitors to be used. Internal compensation ensures fast transient response and a minimum amount of external components. The MIC4690 features a power SO-8 package with a special lead frame that allows over 1A of continuous current. The MIC4690, housed in an SO-8, can replace larger TO-220 and TO-263 packages in many applications. The MIC4690 allows for a high degree of safety. It has a wide input voltage range of 4V to 34V, allowing for it to be used in applications where input voltage transients may be present. Built-in safety features include over-current protection, frequency foldback protection, and thermal shutdown. The MIC4690 is available in an 8-lead SO package with a junction temperature range of -40°C to +125°C.