MCP1603L Series

2MHz 500mA Synchronous PFM/PWM Buck Regulator

Catalog

2MHz 500mA Synchronous PFM/PWM Buck Regulator

Part	Operating Temperature [Max]	Operating Temperature [Min]	Function	Current - Output	Output Configuration	Voltage - Input (Max) [Max]	Package / Case	Voltage - Input (Min) [Min]	Supplier Device Package	Topology	Voltage - Output (Min/Fixed)	Voltage - Output (Max) [Max]	Output Type	Mounting Type	Frequency - Switching	Number of Outputs	Output Type	Supplied Contents	Utilized IC / Part	Regulator Topology	Outputs and Type	Outputs and Type	Voltage - Input [Min]	Voltage - Input [Max]	Main Purpose	Voltage - Output	Board Type
Microchip Technology MCP1603T-ADJI/MC	85 °C	-40 °C	Step-Down	500 mA	Positive	5.5 V	8-VFDFN Exposed Pad	2.7 V	8-DFN (2x3)	Buck	0.8 V	4.5 V	Adjustable	Surface Mount	2 MHz	1
Microchip Technology MCP1603T-150I/OS	125 ¯C	-40 °C	Step-Down	500 mA	Positive	5.5 V	SOT-23-5 Thin TSOT-23-5	2.7 V		Buck	1.5 V			Surface Mount	2 MHz	1	1.81 mOhm
Microchip Technology MCP1603T-250I/MC	125 ¯C	-40 °C	Step-Down	500 mA	Positive	5.5 V	8-VFDFN Exposed Pad	2.7 V	8-DFN (2x3)	Buck	2.5 V			Surface Mount	2 MHz	1	1.81 mOhm
Microchip Technology MCP1603BT-ADJI/OS	85 °C	-40 °C	Step-Down	500 mA	Positive	5.5 V	SOT-23-5 Thin TSOT-23-5	2.7 V		Buck	0.8 V	4.5 V	Adjustable	Surface Mount	2 MHz	1
Microchip Technology MCP1603LT-ADJI/OS	125 ¯C	-40 °C	Step-Down	500 mA	Positive	5.5 V	SOT-23-5 Thin TSOT-23-5	2.7 V		Buck	0.8 V	4.5 V	Adjustable	Surface Mount	2 MHz	1
Microchip Technology MCP1603LT-180I/OS	125 ¯C	-40 °C	Step-Down	500 mA	Positive	5.5 V	SOT-23-5 Thin TSOT-23-5	2.7 V		Buck	1.8 V			Surface Mount	2 MHz	1	1.81 mOhm
Microchip Technology MCP1603T-120I/MC	125 ¯C	-40 °C	Step-Down	500 mA	Positive	5.5 V	8-VFDFN Exposed Pad	2.7 V	8-DFN (2x3)	Buck	1.2 V			Surface Mount	2 MHz	1	1.81 mOhm
Microchip Technology MCP1603T-180I/OS	125 ¯C	-40 °C	Step-Down	500 mA	Positive	5.5 V	SOT-23-5 Thin TSOT-23-5	2.7 V		Buck	1.8 V			Surface Mount	2 MHz	1	1.81 mOhm
Microchip Technology MCP1603T-330I/MC	125 ¯C	-40 °C	Step-Down	500 mA	Positive	5.5 V	8-VFDFN Exposed Pad	2.7 V	8-DFN (2x3)	Buck	3.3 V			Surface Mount	2 MHz	1	1.81 mOhm
Microchip Technology MCP1603RD-TNY				500 mA											2 MHz			Board(s)	MCP1603	Buck	Non-Isolated	1	2.7 V	5.5 V	DC/DC Step Down	0.8 V 1.2 V 1.8 V 2.5 V 3.3 V	Fully Populated

Catalog

2MHz 500mA Synchronous PFM/PWM Buck Regulator

Key Features

• * Small packages: TSOT-23 and 2x3 DFN

• * PWM/PFM automatic transistion

• * Over current and temperature protection

• * Automatic PWM/PFM mode transition

• * Eff. 90%, Shutdown Current 100 nA

• * Small passives 4.5 microhenry, 4.5 microfarad

Description

The MCP1603 is a high efficiency fully integrated 500 mA 2.0 MHz synchronous buck regulator ideally suited for Li-Ion/NiMH Battery powered application powered. At heavy loads, the MCP1603 operates in the 2.0 MHz fixed frequency PWM mode which provides a low noise, low output ripple, small-size solution. When the load is reduced to light levels, the MCP1603 automatically changes operation to a PFM mode to minimize quiescent current draw from the battery. No intervention is necessary for a smooth transition from one mode to another. These two modes of operation allow the MCP1603 to achieve the highest efficiency over the entire operating current range.