LTC3561A Series

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

Manufacturer: Analog Devices Inc./Maxim Integrated

Catalog

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

Part	Voltage - Input (Min) [Min]	Mounting Type	Topology	Voltage - Input (Max) [Max]	Voltage - Output (Min/Fixed)	Operating Temperature [Min]	Operating Temperature [Max]	Current - Output	Output Configuration	Function	Output Type	Frequency - Switching	Number of Outputs	Package / Case	Voltage - Output (Max) [Max]	Supplier Device Package
Analog Devices Inc./Maxim Integrated LTC3561AIDD#PBF	2.5 V	Surface Mount	Buck	5.5 V	0.8 V	-40 C	125 °C	1 A	Positive	Step-Down	Adjustable	2.5 MHz	1	8-WFDFN Exposed Pad	5 V	8-DFN (3x3)
Analog Devices Inc./Maxim Integrated LTC3561AIDD#TRPBF	2.5 V	Surface Mount	Buck	5.5 V	0.8 V	-40 C	125 °C	1 A	Positive	Step-Down	Adjustable	2.5 MHz	1	8-WFDFN Exposed Pad	5 V	8-DFN (3x3)
Analog Devices Inc./Maxim Integrated LTC3561AEDD#TRPBF	2.5 V	Surface Mount	Buck	5.5 V	0.8 V	-40 C	125 °C	1 A	Positive	Step-Down	Adjustable	2.5 MHz	1	8-WFDFN Exposed Pad	5 V	8-DFN (3x3)
Analog Devices Inc./Maxim Integrated LTC3561AEDD#PBF	2.5 V	Surface Mount	Buck	5.5 V	0.8 V	-40 C	125 °C	1 A	Positive	Step-Down	Adjustable	2.5 MHz	1	8-WFDFN Exposed Pad	5 V	8-DFN (3x3)

Catalog

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

Description

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