MAX42403AFLB+

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Analog Devices Inc./Maxim Integrated

DC/DC CONV, SYNC BUCK, 1.5MHZ, 125DEG C ROHS COMPLIANT: YES

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MAX42403AFLB+

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Analog Devices Inc./Maxim Integrated

DC/DC CONV, SYNC BUCK, 1.5MHZ, 125DEG C ROHS COMPLIANT: YES

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Description Specifications Series Pricing CAD Documents

Description

General part information

MAX42403 Series

The MAX42402/MAX42403 IC are a tiny synchronous buck converter with integrated high-side and low-side switches. The MAX42402/MAX42403 are designed to deliver up to 2.5A/3.5A with a wide, 4.5V to 36V input voltage range. Voltage quality can be monitored by observing the PGOOD signal. The IC can operate in dropout by running at 99% duty cycle, making it ideal for industrial applications.The MAX42402/MAX42403 offer externally programmable output voltage. Fixed internal frequency options of 1.5MHz/400kHz are available, which allow for small external components and reduced output ripple.When SYNC is low, the MAX42402/MAX42403 automatically enter skip mode at light loads with an ultra-low quiescent current of 27uA at no load. A pin-selectable forced-PWM mode is also available, which helps to improve EMI performance. The devices have a spread-spectrum frequency modulation option designed to minimize EMI-radiated emissions due to the modulation frequency.The MAX42402/MAX42403 are available in a small, 3mm x 3mm FC2QFN package and uses very few external components.APPLICATIONSIndustrial AutomationPoint-of-LoadDistributed DC Power Systems

Technical Specifications

Parameters and characteristics for this part

Specification	MAX42403AFLB+

Current - Output	3.5 A
Frequency - Switching	1.5 MHz
Function	Step-Down
Mounting Type	Wettable Flank, Surface Mount
Number of Outputs	1
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	15-PowerWFQFN
Package Length	3 mm
Package Name	15-FC2QFN
Package Width	3 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Input (Max)	36 V
Voltage - Input (Min)	4.5 V
Voltage - Output (Max)	12 V
Voltage - Output (Min/Fixed)	0.8 V

MAX42403 Series

36V, 2.5A/3.5A, Fully Integrated Synchronous Buck Converter

Part	Total Output Count	Output Type	Non-Isolated Output Count	Supplied Contents	Board Type	Voltage - Output	Utilized IC / Part	Frequency - Switching	Voltage - Input (Maximum)	Voltage - Input (Minimum)	Regulator Topology	Contents	Main Purpose	Current - Output	Voltage - Output (Min/Fixed)	Package Name	Package Width	Package Length	Topology	Voltage - Output (Max)	Function	Synchronous Rectifier	Mounting Type	Operating Temperature (Max)	Operating Temperature (Min)	Package / Case	Output Configuration	Voltage - Input (Max)	Number of Outputs	Voltage - Input (Min)
Analog Devices Inc./Maxim Integrated MAX42403EVKIT#	1	Non-Isolated	1 count	Board(s)	Fully Populated	3.3 V	MAX42402 MAX42403	1.5 MHz	36 V	4.5 V	Buck	Board	DC/DC Step Down	3.5 A
Analog Devices Inc./Maxim Integrated MAX42403AFLA+T		Adjustable						400 kHz						3.5 A	0.8 V	15-FC2QFN	3 mm	3 mm	Buck	12 V	Step-Down	Yes	Surface Mount Wettable Flank	125 °C	-40 °C	15-PowerWFQFN	Positive	36 V	1	4.5 V
Analog Devices Inc./Maxim Integrated MAX42403AFLB+		Adjustable						1.5 MHz						3.5 A	0.8 V	15-FC2QFN	3 mm	3 mm	Buck	12 V	Step-Down	Yes	Surface Mount Wettable Flank	125 °C	-40 °C	15-PowerWFQFN	Positive	36 V	1	4.5 V
Analog Devices Inc./Maxim Integrated MAX42403AFLB+T		Adjustable						1.5 MHz						3.5 A	0.8 V	15-FC2QFN	3 mm	3 mm	Buck	12 V	Step-Down	Yes	Surface Mount Wettable Flank	125 °C	-40 °C	15-PowerWFQFN	Positive	36 V	1	4.5 V
Analog Devices Inc./Maxim Integrated MAX42403AFLA+		Adjustable						400 kHz						3.5 A	0.8 V	15-FC2QFN	3 mm	3 mm	Buck	12 V	Step-Down	Yes	Surface Mount Wettable Flank	125 °C	-40 °C	15-PowerWFQFN	Positive	36 V	1	4.5 V

Pricing

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

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

MAX42402-MAX42403: 36V, 2.5A/3.5A, Fully Integrated Synchronous Buck Converter Data Sheet (Rev.2)

Package Drawing - 15 LD, FC2QFN 3X3X0.75