Specification	MIC4685WR-TR

Current - Output	3 A
Frequency - Switching	200 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	SPAK-7 (7 Leads + Tab)
Supplier Device Package	7-SPAK
Synchronous Rectifier	False
Topology	Buck
Voltage - Input (Max) [Max]	30 V
Voltage - Input (Min) [Min]	4 V
Voltage - Output (Max) [Max]	28.2 V
Voltage - Output (Min/Fixed)	1.235 V

MIC4685 Series

Part	Voltage - Input (Min) [Min]	Package / Case	Output Type	Current - Output	Frequency - Switching	Output Configuration	Voltage - Output (Max) [Max]	Voltage - Input (Max) [Max]	Number of Outputs	Function	Topology	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Output (Min/Fixed)	Mounting Type	Supplier Device Package	Output Type
Microchip Technology MIC4685BR TR	4 V	SPAK-7 (7 Leads + Tab)	Adjustable	3 A	200 kHz	Positive	28.2 V	30 V	1	Step-Down	Buck	-40 °C	125 ¯C	1.235 V	Surface Mount	7-SPAK
Microchip Technology MIC4685-5.0BR	4 V	SPAK-7 (7 Leads + Tab)		3 A	200 kHz	Positive		30 V	1	Step-Down	Buck	-40 °C	125 ¯C	5 V	Surface Mount	7-SPAK	1.81 mOhm
Microchip Technology MIC4685WR	4 V	SPAK-7 (7 Leads + Tab)	Adjustable	3 A	200 kHz	Positive	28.2 V	30 V	1	Step-Down	Buck	-40 °C	125 ¯C	1.235 V	Surface Mount	7-SPAK
Microchip Technology MIC4685WR-TR	4 V	SPAK-7 (7 Leads + Tab)	Adjustable	3 A	200 kHz	Positive	28.2 V	30 V	1	Step-Down	Buck	-40 °C	125 ¯C	1.235 V	Surface Mount	7-SPAK

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 3.78
	Digi-Reel®	1	$ 3.78
	Tape & Reel (TR)	750	$ 2.87
Microchip Direct	T/R	1	$ 3.78
		25	$ 3.16
		100	$ 2.87
		1000	$ 2.78
		5000	$ 2.74
Newark	Each (Supplied on Full Reel)	100	$ 2.96

Description

General part information

MIC4685 Series

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.

Documents

Technical documentation and resources

MIC4685 Data Sheet

Data Sheets

Product Change Notice EN

Datasheet