LT3999IDD#PBF

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Analog Devices Inc./Maxim Integrated

DC/DC CONTROLLER, PUSH-PULL, 2.7V TO 36V SUPPLY, 1 OUTPUT, 48% DUTY CYCLE, 1MHZ, DFN-EP-10

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LT3999IDD#PBF

Active

Analog Devices Inc./Maxim Integrated

DC/DC CONTROLLER, PUSH-PULL, 2.7V TO 36V SUPPLY, 1 OUTPUT, 48% DUTY CYCLE, 1MHZ, DFN-EP-10

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Description Specifications Series Pricing CAD Documents

Description

General part information

LT3999 Series

The LT3999 is a monolithic, high voltage, high frequency DC/DC transformer driver providing isolated power in a small solution footprint.The LT3999 has two 1A current limited power switches that switch out of phase. The duty cycle is programmable to adjust the output voltage. The switching frequency is programmed up to 1MHz and can be synchronized to an external clock for more accurate placement of switcher harmonics. The input operating range is programmed with the precision undervoltage and overvoltage lockouts. The supply current is reduced to less than 1μA during shutdown. A user-defined RC time constant provides an adjustable soft-start capability by limiting the inrush current at start-up.The LT3999 is available in a 10-lead MSOP and 3mm × 3mm DFN package with exposed pad.ApplicationsLow Noise Isolated SuppliesMedical Instrument and SafetyDistributed PowerMultiple Output SuppliesPositive-to-Negative SuppliesNoise Immunity in Data Acquisition, RS232 and RS485

Technical Specifications

Parameters and characteristics for this part

Specification	LT3999IDD#PBF

Current - Output	1 A
Frequency - Switching (Max)	1 MHz
Frequency - Switching (Min)	50 kHz
Function	Step-Up, Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive, Isolation Capable
Output Type	Adjustable
Package / Case	10-WFDFN Exposed Pad
Package Length	3 mm
Package Name	10-DFN
Package Width	3 mm
Synchronous Rectifier	No
Topology	Push-Pull
Voltage - Input (Max)	36 V
Voltage - Input (Min)	2.7 V

LT3999 Series

Low Noise, 1A, 1MHz Push-Pull DC/DC Driver with Duty Cycle Control

Part	Mounting Type	Voltage - Input (Min)	Current - Output	Function	Package Length	Package Name	Package Width	Topology	Output Configuration	Voltage - Input (Max)	Synchronous Rectifier	Output Type	Operating Temperature (Max)	Operating Temperature (Min)	Frequency - Switching (Min)	Frequency - Switching (Max)	Number of Outputs	Package / Case	Package Features
Analog Devices Inc./Maxim Integrated LT3999EDD#TRPBF	Surface Mount	2.7 V	1 A	Step-Down Step-Up	3 mm	10-DFN	3 mm	Push-Pull	Isolation Capable Positive	36 V	No	Adjustable	125 °C	-40 °C	50 kHz	1 MHz	1	10-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LT3999EMSE#PBF	Surface Mount	2.7 V	1 A	Step-Down Step-Up	0.118 in	10-MSOP 10-MSOP-EP	3 mm	Push-Pull	Isolation Capable Positive	36 V	No	Adjustable	125 °C	-40 °C	50 kHz	1 MHz	1		Exposed Pad
Analog Devices Inc./Maxim Integrated LT3999IDD#PBF	Surface Mount	2.7 V	1 A	Step-Down Step-Up	3 mm	10-DFN	3 mm	Push-Pull	Isolation Capable Positive	36 V	No	Adjustable	125 °C	-40 °C	50 kHz	1 MHz	1	10-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LT3999IMSE#PBF	Surface Mount	2.7 V	1 A	Step-Down Step-Up	0.118 in	10-MSOP 10-MSOP-EP	3 mm	Push-Pull	Isolation Capable Positive	36 V	No	Adjustable	125 °C	-40 °C	50 kHz	1 MHz	1		Exposed Pad
Analog Devices Inc./Maxim Integrated LT3999IMSE#TRPBF	Surface Mount	2.7 V	1 A	Step-Down Step-Up	0.118 in	10-MSOP 10-MSOP-EP	3 mm	Push-Pull	Isolation Capable Positive	36 V	No	Adjustable	125 °C	-40 °C	50 kHz	1 MHz	1		Exposed Pad
Analog Devices Inc./Maxim Integrated LT3999MPMSE#PBF	Surface Mount	2.7 V	1 A	Step-Down Step-Up	0.118 in	10-MSOP 10-MSOP-EP	3 mm	Push-Pull	Isolation Capable Positive	36 V	No	Adjustable	150 °C	-55 °C	50 kHz	1 MHz	1		Exposed Pad
Analog Devices Inc./Maxim Integrated LT3999IDD#TRPBF	Surface Mount	2.7 V	1 A	Step-Down Step-Up	3 mm	10-DFN	3 mm	Push-Pull	Isolation Capable Positive	36 V	No	Adjustable	125 °C	-40 °C	50 kHz	1 MHz	1	10-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LT3999EMSE#TRPBF	Surface Mount	2.7 V	1 A	Step-Down Step-Up	0.118 in	10-MSOP 10-MSOP-EP	3 mm	Push-Pull	Isolation Capable Positive	36 V	No	Adjustable	125 °C	-40 °C	50 kHz	1 MHz	1		Exposed Pad
Analog Devices Inc./Maxim Integrated LT3999EDD#PBF	Surface Mount	2.7 V	1 A	Step-Down Step-Up	3 mm	10-DFN	3 mm	Push-Pull	Isolation Capable Positive	36 V	No	Adjustable	125 °C	-40 °C	50 kHz	1 MHz	1	10-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LT3999HMSE#TRPBF	Surface Mount	2.7 V	1 A	Step-Down Step-Up	0.118 in	10-MSOP 10-MSOP-EP	3 mm	Push-Pull	Isolation Capable Positive	36 V	No	Adjustable	150 °C	-40 °C	50 kHz	1 MHz	1		Exposed Pad

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

R530 Reliability Data

Technical Data Sheet EN

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