LTC3561AIDD#PBF

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Analog Devices Inc./Maxim Integrated

1A, 4MHZ, SYNCHRONOUS STEP-DOWN DC/DC CONVERTER

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LTC3561AIDD#PBF

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Analog Devices Inc./Maxim Integrated

1A, 4MHZ, SYNCHRONOUS STEP-DOWN DC/DC CONVERTER

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3561A Series

The LTC3561A is a constant frequency, synchronous step-down DC/DC converter. Intended for medium power applications, it operates from a 2.5V to 5.5V input voltage range and has a user configurable operating frequency up to 4MHz, allowing the use of tiny, low cost capacitors and inductors 1mm or less in height. The output voltage is adjustable from 0.8V to 5.5V. Internal synchronous power switches provide high efficiency. The LTC3561A’s current mode architecture and external compensation allow the transient response to be optimized over a wide range of loads and output capacitors.To further maximize battery life, the P-channel MOSFET is turned on continuously in dropout (100% duty cycle). In shutdown, the device draws <1μA.ApplicationsNotebook ComputersDigital CamerasCellular PhonesHandheld InstrumentsBoard Mounted Power Supplies

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3561AIDD#PBF

Current - Output	1 A
Frequency - Switching	2.5 MHz
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	8-WFDFN Exposed Pad
Package Length	3 mm
Package Name	8-DFN
Package Width	3 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Input (Max)	5.5 V
Voltage - Input (Min)	2.5 V
Voltage - Output (Max)	5 V
Voltage - Output (Min/Fixed)	0.8 V

LTC3561A Series

1A, 4MHz, Synchronous Step-Down DC/DC Converter

Part	Voltage - Input (Min)	Mounting Type	Synchronous Rectifier	Topology	Voltage - Input (Max)	Voltage - Output (Min/Fixed)	Operating Temperature (Max)	Operating Temperature (Min)	Current - Output	Output Configuration	Function	Output Type	Frequency - Switching	Number of Outputs	Package / Case	Voltage - Output (Max)	Package Width	Package Name	Package Length
Analog Devices Inc./Maxim Integrated LTC3561AIDD#PBF	2.5 V	Surface Mount	Yes	Buck	5.5 V	0.8 V	125 °C	-40 °C	1 A	Positive	Step-Down	Adjustable	2.5 MHz	1	8-WFDFN Exposed Pad	5 V	3 mm	8-DFN	3 mm
Analog Devices Inc./Maxim Integrated LTC3561AIDD#TRPBF	2.5 V	Surface Mount	Yes	Buck	5.5 V	0.8 V	125 °C	-40 °C	1 A	Positive	Step-Down	Adjustable	2.5 MHz	1	8-WFDFN Exposed Pad	5 V	3 mm	8-DFN	3 mm
Analog Devices Inc./Maxim Integrated LTC3561AEDD#TRPBF	2.5 V	Surface Mount	Yes	Buck	5.5 V	0.8 V	125 °C	-40 °C	1 A	Positive	Step-Down	Adjustable	2.5 MHz	1	8-WFDFN Exposed Pad	5 V	3 mm	8-DFN	3 mm
Analog Devices Inc./Maxim Integrated LTC3561AEDD#PBF	2.5 V	Surface Mount	Yes	Buck	5.5 V	0.8 V	125 °C	-40 °C	1 A	Positive	Step-Down	Adjustable	2.5 MHz	1	8-WFDFN Exposed Pad	5 V	3 mm	8-DFN	3 mm

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

R415 Reliability Data

LTC3561AIDD#PBF | Datasheet