Specification	LTC3409IDD#PBF

Current - Output	600 mA
Frequency - Switching [Max]	2.6 MHz
Frequency - Switching [Min]	1.7 MHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	85 C
Operating Temperature [Min]	-40 ¯C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	8-WFDFN Exposed Pad
Supplier Device Package	8-DFN (3x3)
Synchronous Rectifier	True
Topology	Buck
Voltage - Input (Max) [Max]	5.5 V
Voltage - Input (Min) [Min]	1.6 V
Voltage - Output (Max) [Max]	5.5 V
Voltage - Output (Min/Fixed) [Min]	0.613 V

LTC3409 Series

600mA Low VINBuck Regulator in 3mm × 3mm DFN

Part	Frequency - Switching [Max]	Frequency - Switching [Min]	Number of Outputs	Output Type	Current - Output	Voltage - Output (Min/Fixed) [Min]	Voltage - Input (Min) [Min]	Mounting Type	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Input (Max) [Max]	Topology	Output Configuration	Voltage - Output (Max) [Max]	Package / Case	Function	Supplier Device Package	Voltage - Output (Min/Fixed)	Main Purpose	Utilized IC / Part	Voltage - Output	Regulator Topology	Voltage - Input [Max]	Voltage - Input [Min]	Outputs and Type	Frequency - Switching	Contents
Analog Devices Inc./Maxim Integrated LTC3409IDD#PBF	2.6 MHz	1.7 MHz	1	Adjustable	600 mA	0.613 V	1.6 V	Surface Mount	85 C	-40 ¯C	5.5 V	Buck	Positive	5.5 V	8-WFDFN Exposed Pad	Step-Down	8-DFN (3x3)
Analog Devices Inc./Maxim Integrated LTC3409AEDD#TRPBF	2.6 MHz	1.7 MHz	1	Adjustable	600 mA		1.6 V	Surface Mount	85 C	-40 ¯C	5.5 V	Buck	Positive	5.5 V	8-WFDFN Exposed Pad	Step-Down	8-DFN (3x3)	0.62 V
Analog Devices Inc./Maxim Integrated LTC3409AEDD#PBF	2.6 MHz	1.7 MHz	1	Adjustable	600 mA		1.6 V	Surface Mount	85 C	-40 ¯C	5.5 V	Buck	Positive	5.5 V	8-WFDFN Exposed Pad	Step-Down	8-DFN (3x3)	0.62 V
Analog Devices Inc./Maxim Integrated LTC3409AIDD#TRPBF	2.6 MHz	1.7 MHz	1	Adjustable	600 mA		1.6 V	Surface Mount	85 C	-40 ¯C	5.5 V	Buck	Positive	5.5 V	8-WFDFN Exposed Pad	Step-Down	8-DFN (3x3)	0.62 V
Analog Devices Inc./Maxim Integrated LTC3409EDD#PBF	2.6 MHz	1.7 MHz	1	Adjustable	600 mA	0.613 V	1.6 V	Surface Mount	85 C	-40 ¯C	5.5 V	Buck	Positive	5.5 V	8-WFDFN Exposed Pad	Step-Down	8-DFN (3x3)
Analog Devices Inc./Maxim Integrated LTC3409EDD#TRPBF	2.6 MHz	1.7 MHz	1	Adjustable	600 mA	0.613 V	1.6 V	Surface Mount	85 C	-40 ¯C	5.5 V	Buck	Positive	5.5 V	8-WFDFN Exposed Pad	Step-Down	8-DFN (3x3)
Analog Devices Inc./Maxim Integrated LTC3409IDD#TRPBF	2.6 MHz	1.7 MHz	1	Adjustable	600 mA	0.613 V	1.6 V	Surface Mount	85 C	-40 ¯C	5.5 V	Buck	Positive	5.5 V	8-WFDFN Exposed Pad	Step-Down	8-DFN (3x3)
Analog Devices Inc./Maxim Integrated DC828A					600 mA														DC/DC Step Down	LTC3409	1.2 V	Buck	5.5 V	1.6 V	1 Non-Isolated Output	2.6 MHz	Board(s)

Pricing

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

Distributor	Package	Quantity	$	Updated

Digikey	N/A	12	$ 7.20	1m+
	Tube	1	$ 7.47	1m+
		10	$ 5.10
Mouser	N/A	1	$ 5.66	1m+
		10	$ 4.34
		242	$ 4.33
		2541	$ 4.32

Description

General part information

LTC3409 Series

The LTC3409 is a high efficiency, monolithic synchronous buck regulator using a constant frequency, current mode architecture. The output voltage is adjusted via an external resistor divider.Fixed switching frequencies of 1.7MHz and 2.6MHz are supported. Alternatively, an internal PLL will synchronize to an external clock in the frequency range of 1MHz to 3MHz. This range of switching frequencies allows the use of small surface mount inductors and capacitors, including ceramics.Supply current during Burst Mode operation is only 65µA dropping to <1µA in shutdown. The 1.6V to 5.5V input voltage range makes the LTC3409 ideally suited for single cell Li-Ion, Li-Metal and 2-cell alkaline, NiCd or NiMH battery-powered applications. 100% duty cycle capability provides low dropout operation, extending battery life in portable systems. Burst Mode operation can be user enabled, increasing efficiency at light loads, further extending battery life.The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Internal soft-start offers controlled output voltage rise time at start-up without the need for external components.Protected by U.S. Patents, including 5481178, 6580258, 6304066, 6127815, 6498466, 6611131.Vout RangeLTC3409±5%LTC3409A±3%ApplicationsCellular PhonesDigital CamerasMP3 Players

Documents

Technical documentation and resources

R415 Reliability Data

Reliability Data

LTpowerPlanner III Quick Start Guide

Datasheet