LT3509IMSE#TRPBF

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Analog Devices Inc./Maxim Integrated

CONV DC-DC 3.6V TO 36V SYNCHRONOUS STEP DOWN DUAL-OUT 0.8V TO 35.28V 0.7A/0.7A 16-PIN MSOP EP T/R

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LT3509IMSE#TRPBF

Active

Analog Devices Inc./Maxim Integrated

CONV DC-DC 3.6V TO 36V SYNCHRONOUS STEP DOWN DUAL-OUT 0.8V TO 35.28V 0.7A/0.7A 16-PIN MSOP EP T/R

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Description Specifications Series Pricing CAD Documents

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

Technical Specifications

Parameters and characteristics for this part

Specification	LT3509IMSE#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 Features	Exposed Pad
Package Length	0.118 in
Package Name	16-TFSOP, 16-MSOP-EP
Package Width	3 mm
Synchronous Rectifier	No
Topology	Buck
Voltage - Input (Max)	36 V
Voltage - Input (Min)	3.6 V
Voltage - Output (Max)	34.2 V
Voltage - Output (Min/Fixed)	0.8 V

LT3509 Series

Part	Operating Temperature (Max)	Operating Temperature (Min)	Frequency - Switching (Max)	Frequency - Switching (Min)	Output Configuration	Output Type	Current - Output	Mounting Type	Voltage - Output (Min/Fixed)	Topology	Voltage - Input (Max)	Synchronous Rectifier	Package Name	Function	Voltage - Output (Max)	Package Width	Package Features	Package Length	Voltage - Input (Min)	Number of Outputs	Package / Case
Analog Devices Inc./Maxim Integrated LT3509EMSE#TRPBF	125 °C	-40 °C	2.15 MHz	260 kHz	Positive	Adjustable	700 mA	Surface Mount	0.8 V	Buck	36 V	No	16-MSOP-EP 16-TFSOP	Step-Down	34.2 V	3 mm	Exposed Pad	0.118 in	3.6 V	2
Analog Devices Inc./Maxim Integrated LT3509EDE#TRPBF	125 °C	-40 °C	2.15 MHz	260 kHz	Positive	Adjustable	700 mA	Surface Mount	0.8 V	Buck	36 V	No	14-DFN	Step-Down	34.2 V	3 mm		4 mm	3.6 V	2	14-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LT3509IDE#TRPBF	125 °C	-40 °C	2.15 MHz	260 kHz	Positive	Adjustable	700 mA	Surface Mount	0.8 V	Buck	36 V	No	14-DFN	Step-Down	34.2 V	3 mm		4 mm	3.6 V	2	14-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LT3509EDE#PBF	125 °C	-40 °C	2.15 MHz	260 kHz	Positive	Adjustable	700 mA	Surface Mount	0.8 V	Buck	36 V	No	14-DFN	Step-Down	34.2 V	3 mm		4 mm	3.6 V	2	14-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LT3509HMSE#TRPBF	150 °C	-40 °C	2.15 MHz	260 kHz	Positive	Adjustable	700 mA	Surface Mount	0.8 V	Buck	36 V	No	16-MSOP-EP 16-TFSOP	Step-Down	34.2 V	3 mm	Exposed Pad	0.118 in	3.6 V	2
Analog Devices Inc./Maxim Integrated LT3509IMSE#TRPBF	125 °C	-40 °C	2.15 MHz	260 kHz	Positive	Adjustable	700 mA	Surface Mount	0.8 V	Buck	36 V	No	16-MSOP-EP 16-TFSOP	Step-Down	34.2 V	3 mm	Exposed Pad	0.118 in	3.6 V	2
Analog Devices Inc./Maxim Integrated LT3509EMSE#PBF	125 °C	-40 °C	2.15 MHz	260 kHz	Positive	Adjustable	700 mA	Surface Mount	0.8 V	Buck	36 V	No	16-MSOP-EP 16-TFSOP	Step-Down	34.2 V	3 mm	Exposed Pad	0.118 in	3.6 V	2
Analog Devices Inc./Maxim Integrated LT3509IMSE#PBF	125 °C	-40 °C	2.15 MHz	260 kHz	Positive	Adjustable	700 mA	Surface Mount	0.8 V	Buck	36 V	No	16-MSOP-EP 16-TFSOP	Step-Down	34.2 V	3 mm	Exposed Pad	0.118 in	3.6 V	2
Analog Devices Inc./Maxim Integrated LT3509HMSE#PBF	150 °C	-40 °C	2.15 MHz	260 kHz	Positive	Adjustable	700 mA	Surface Mount	0.8 V	Buck	36 V	No	16-MSOP-EP 16-TFSOP	Step-Down	34.2 V	3 mm	Exposed Pad	0.118 in	3.6 V	2
Analog Devices Inc./Maxim Integrated LT3509IDE#PBF	125 °C	-40 °C	2.15 MHz	260 kHz	Positive	Adjustable	700 mA	Surface Mount	0.8 V	Buck	36 V	No	14-DFN	Step-Down	34.2 V	3 mm		4 mm	3.6 V	2	14-WFDFN Exposed Pad

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

R530 Reliability Data

LT3509IMSE#TRPBF | Datasheet