Specification	MIC2178YWM

Current - Output	2.5 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	20-SOIC
Package / Case [y]	0.295 in
Package / Case [y]	7.5 mm
Supplier Device Package	20-SOIC
Synchronous Rectifier	False
Topology	Buck
Voltage - Input (Max) [Max]	16.5 V
Voltage - Input (Min) [Min]	4.5 V
Voltage - Output (Max) [Max]	16.5 V
Voltage - Output (Min/Fixed)	1.245 V

MIC2178 Series

Part	Output Configuration	Topology	Current - Output	Frequency - Switching	Voltage - Input (Min) [Min]	Mounting Type	Output Type	Number of Outputs	Package / Case	Package / Case [y]	Package / Case [y]	Function	Voltage - Input (Max) [Max]	Voltage - Output (Min/Fixed)	Voltage - Output (Max) [Max]	Supplier Device Package	Operating Temperature [Min]	Operating Temperature [Max]	Output Type
Microchip Technology MIC2178YWM-TR	Positive	Buck	2.5 A	200 kHz	4.5 V	Surface Mount	Adjustable	1	20-SOIC	0.295 in	7.5 mm	Step-Down	16.5 V	1.245 V	16.5 V	20-SOIC	-40 °C	125 ¯C
Microchip Technology MIC2178-3.3BWM-TR	Positive	Buck	2.5 A	200 kHz	4.5 V	Surface Mount		1	20-SOIC	0.295 in	7.5 mm	Step-Down	16.5 V	3.3 V		20-SOIC	-40 °C	125 ¯C	1.81 mOhm
Microchip Technology MIC2178-3.3BWM	Positive	Buck	2.5 A	200 kHz	4.5 V	Surface Mount		1	20-SOIC	0.295 in	7.5 mm	Step-Down	16.5 V	3.3 V		20-SOIC	-40 °C	125 ¯C	1.81 mOhm
Microchip Technology MIC2178YWM	Positive	Buck	2.5 A	200 kHz	4.5 V	Surface Mount	Adjustable	1	20-SOIC	0.295 in	7.5 mm	Step-Down	16.5 V	1.245 V	16.5 V	20-SOIC	-40 °C	125 ¯C
Microchip Technology MIC2178-5.0BWM	Positive	Buck	2.5 A	200 kHz	4.5 V	Surface Mount		1	20-SOIC	0.295 in	7.5 mm	Step-Down	16.5 V	5 V		20-SOIC	-40 °C	125 ¯C	1.81 mOhm
Microchip Technology MIC2178BWM	Positive	Buck	2.5 A	200 kHz	4.5 V	Surface Mount	Adjustable	1	20-SOIC	0.295 in	7.5 mm	Step-Down	16.5 V	1.245 V	16.5 V	20-SOIC	-40 °C	125 ¯C

Pricing

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

Distributor	Package	Quantity	$

Microchip Direct	TUBE	1	$ 7.98
		25	$ 6.65
		100	$ 6.03
		1000	$ 5.84
		5000	$ 5.77

Description

General part information

MIC2178 Series

The MIC2178 is a 200kHz synchronous buck (step-down) switching regulator designed for high-efficiency, battery-powered applications.The MIC2178 operates from a 4.5V to 16.5V input and features internal power MOSFETs that can supply up to 2.5A output current. It can operate with a maximum duty cycle of 100% for use in low-dropout conditions. It also features a shutdown mode that reduces quiescent current to less than 5µA.

The MIC2178 achieves high efficiency over a wide output current range by operating in either PWM or skip mode. The operating mode is externally selected, typically by an intelligent system, which chooses the appropriate mode according to operating conditions, efficiency, and noise requirements. The switching frequency is preset to 200kHz and can be synchronized to an external clock signal of up to 300kHz.

The MIC2178 uses current-mode control with internal current sensing. Current-mode control provides superior line regulation and makes the regulator control loop easy to compensate. The output is protected with pulse-by-pulse current limiting and thermal shutdown. Undervoltage lockout turns the output off when the input voltage is less than 4.5V.

Documents

Technical documentation and resources

MIC2178 - 2.5A Synchronous Buck Regulator

Data Sheets