LTC3649EUFD#PBF

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Analog Devices

60V, 4A SYNCHRONOUS STEP-DOWN REGULATOR WITH RAIL-TO-RAIL PROGRAMMABLE OUTPUT

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DocumentsR526 Reliability Data Datasheet

LTC3649EUFD#PBF

Active

Analog Devices

60V, 4A SYNCHRONOUS STEP-DOWN REGULATOR WITH RAIL-TO-RAIL PROGRAMMABLE OUTPUT

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DocumentsR526 Reliability Data Datasheet

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3649EUFD#PBF

Current - Output	4 A
Frequency - Switching	1 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	28-WFQFN Exposed Pad
Supplier Device Package	28-QFN (4x5)
Synchronous Rectifier	True
Topology	Buck
Voltage - Input (Max) [Max]	60 V
Voltage - Input (Min) [Min]	3.1 V
Voltage - Output (Max) [Max]	55 V
Voltage - Output (Min/Fixed)	0 V

LTC3649 Series

Part	Output Type	Package / Case	Voltage - Input (Max) [Max]	Voltage - Output (Max) [Max]	Voltage - Input (Min) [Min]	Mounting Type	Function	Topology	Operating Temperature [Min]	Operating Temperature [Max]	Output Configuration	Number of Outputs	Supplier Device Package	Frequency - Switching	Current - Output	Package / Case [custom]	Package / Case [x]
Analog Devices LTC3649EUFD#PBF	Adjustable	28-WFQFN Exposed Pad	60 V	55 V	3.1 V	Surface Mount	Step-Down	Buck	-40 °C	125 ¯C	Positive	1	28-QFN (4x5)	1 MHz	4 A
Analog Devices LTC3649EFE	Adjustable	28-TSSOP Exposed Pad	60 V	55 V	3.1 V	Surface Mount	Step-Down	Buck	-40 °C	125 ¯C	Positive	1	28-TSSOP-EP	1 MHz	4 A	4.4 mm	0.173 in
Analog Devices LTC3649IFE#PBF	Adjustable	28-TSSOP Exposed Pad	60 V	55 V	3.1 V	Surface Mount	Step-Down	Buck	-40 °C	125 ¯C	Positive	1	28-TSSOP-EP	1 MHz	4 A	4.4 mm	0.173 in
Analog Devices LTC3649EUFD#TRPBF	Adjustable	28-WFQFN Exposed Pad	60 V	55 V	3.1 V	Surface Mount	Step-Down	Buck	-40 °C	125 ¯C	Positive	1	28-QFN (4x5)	1 MHz	4 A
Analog Devices LTC3649IFE#TRPBF	Adjustable	28-TSSOP Exposed Pad	60 V	55 V	3.1 V	Surface Mount	Step-Down	Buck	-40 °C	125 ¯C	Positive	1	28-TSSOP-EP	1 MHz	4 A	4.4 mm	0.173 in

Pricing

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

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 16.82
		10	$ 12.09
		25	$ 10.87
		100	$ 9.51
		250	$ 8.85
		500	$ 8.45
		1000	$ 8.40

Description

General part information

LTC3649 Series

The LTC3649 is a high efficiency 60V, 4A synchronous monolithic step-down regulator. The regulator features a single resistor programmable output voltage, internal compensation and high efficiencies over a wide VOUTrange.The step-down regulator operates from an input voltage range of 3.1V to 60V and provides an adjustable rail-to-rail output range from (VIN– 0.5V) to ground while delivering up to 4A of output current. The switching frequency is also adjusted with an external resistor. A user-selectable mode input is provided to allow the user to trade off ripple noise for efficiency at light loads; Burst Mode operation provides the highest efficiency at light loads, while forced continuous mode provides low output ripple. The MODE/SYNC pin can also be used to allow the user to synchronize the switching frequency to an external clock.The LTC3649 operates with a peak current mode architecture that allows for fast transient response with inherent cycle-to-cycle current limit protection. It also features programmable output current limit, current monitoring and input voltage regulation.ApplicationsIndustrial ApplicationsAutomotive Applications