Specification	LT3509EDE#TRPBF

Current - Output	700 mA
Frequency - Switching [Max]	2.15 MHz
Frequency - Switching [Min]	260 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	2
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-40 C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	14-WFDFN Exposed Pad
Supplier Device Package	14-DFN (4x3)
Synchronous Rectifier	False
Topology	Buck
Voltage - Input (Max) [Max]	36 V
Voltage - Input (Min) [Min]	3.6 V
Voltage - Output (Max) [Max]	34.2 V
Voltage - Output (Min/Fixed)	0.8 V

LT3509 Series

Part	Number of Outputs	Voltage - Input (Min) [Min]	Package / Case	Package / Case	Voltage - Output (Max) [Max]	Function	Supplier Device Package	Voltage - Input (Max) [Max]	Topology	Voltage - Output (Min/Fixed)	Mounting Type	Current - Output	Output Type	Output Configuration	Frequency - Switching [Max]	Frequency - Switching [Min]	Operating Temperature [Min]	Operating Temperature [Max]
Analog Devices Inc./Maxim Integrated LT3509EMSE#TRPBF	2	3.6 V	16-TFSOP Exposed Pad	0.118 in 3 mm	34.2 V	Step-Down	16-MSOP-EP	36 V	Buck	0.8 V	Surface Mount	700 mA	Adjustable	Positive	2.15 MHz	260 kHz	-40 C	125 °C
Analog Devices Inc./Maxim Integrated LT3509EDE#TRPBF	2	3.6 V	14-WFDFN Exposed Pad		34.2 V	Step-Down	14-DFN (4x3)	36 V	Buck	0.8 V	Surface Mount	700 mA	Adjustable	Positive	2.15 MHz	260 kHz	-40 C	125 °C
Analog Devices Inc./Maxim Integrated LT3509IDE#TRPBF	2	3.6 V	14-WFDFN Exposed Pad		34.2 V	Step-Down	14-DFN (4x3)	36 V	Buck	0.8 V	Surface Mount	700 mA	Adjustable	Positive	2.15 MHz	260 kHz	-40 C	125 °C
Analog Devices Inc./Maxim Integrated LT3509EDE#PBF	2	3.6 V	14-WFDFN Exposed Pad		34.2 V	Step-Down	14-DFN (4x3)	36 V	Buck	0.8 V	Surface Mount	700 mA	Adjustable	Positive	2.15 MHz	260 kHz	-40 C	125 °C
Analog Devices Inc./Maxim Integrated LT3509HMSE#TRPBF	2	3.6 V	16-TFSOP Exposed Pad	0.118 in 3 mm	34.2 V	Step-Down	16-MSOP-EP	36 V	Buck	0.8 V	Surface Mount	700 mA	Adjustable	Positive	2.15 MHz	260 kHz	-40 °C	150 °C
Analog Devices Inc./Maxim Integrated LT3509IMSE#TRPBF	2	3.6 V	16-TFSOP Exposed Pad	0.118 in 3 mm	34.2 V	Step-Down	16-MSOP-EP	36 V	Buck	0.8 V	Surface Mount	700 mA	Adjustable	Positive	2.15 MHz	260 kHz	-40 C	125 °C
Analog Devices Inc./Maxim Integrated LT3509EMSE#PBF	2	3.6 V	16-TFSOP Exposed Pad	0.118 in 3 mm	34.2 V	Step-Down	16-MSOP-EP	36 V	Buck	0.8 V	Surface Mount	700 mA	Adjustable	Positive	2.15 MHz	260 kHz	-40 C	125 °C
Analog Devices Inc./Maxim Integrated LT3509IMSE#PBF	2	3.6 V	16-TFSOP Exposed Pad	0.118 in 3 mm	34.2 V	Step-Down	16-MSOP-EP	36 V	Buck	0.8 V	Surface Mount	700 mA	Adjustable	Positive	2.15 MHz	260 kHz	-40 C	125 °C
Analog Devices Inc./Maxim Integrated LT3509HMSE#PBF	2	3.6 V	16-TFSOP Exposed Pad	0.118 in 3 mm	34.2 V	Step-Down	16-MSOP-EP	36 V	Buck	0.8 V	Surface Mount	700 mA	Adjustable	Positive	2.15 MHz	260 kHz	-40 °C	150 °C
Analog Devices Inc./Maxim Integrated LT3509IDE#PBF	2	3.6 V	14-WFDFN Exposed Pad		34.2 V	Step-Down	14-DFN (4x3)	36 V	Buck	0.8 V	Surface Mount	700 mA	Adjustable	Positive	2.15 MHz	260 kHz	-40 C	125 °C

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	166	$ 9.75	1m+
Newark	Each (Supplied on Cut Tape)	1	$ 9.75	1m+
		10	$ 6.61
		25	$ 5.79
		50	$ 5.33
		100	$ 4.86
		250	$ 4.55

Description

General part information

LT3509 Series

The LT3509 is a dual, current mode, step-down switching regulator, with internal power switches each capable of providing 700mA output current. This regulator provides a compact and robust solution for multi-rail systems in harsh environments. It incorporates several protection features including overvoltage lockout and cycle-by-cycle current limit. Thermal shutdown provides additional protection. The loop compensation components and the boost diodes are integrated on-chip. Switching frequency is set by a single external resistor. External synchronization is also possible. The high maximum switching frequency allows the use of small inductors and ceramic capacitors for low ripple. Constant frequency operation above the AM band avoids interference with radio reception, making the LT3509 well suited for automotive applications. Each regulator has an independent shutdown and soft-start control pin. When both converters are powered down, the common circuitry enters a low current shutdown state.ApplicationsAutomotive ElectronicsIndustrial ControlsWall Transformer RegulationNetworking DevicesCPU, DSP, or FPGA Power

Documents

Technical documentation and resources

R530 Reliability Data

Reliability Data

Technical Data Sheet EN

Datasheet