LT3481EMSE#PBF

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Analog Devices

36V, 2A, 2.8MHZ STEP-DOWN SWITCHING REGULATOR WITH 50ΜA QUIESCENT CURRENT

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LT3481EMSE#PBF

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Analog Devices

36V, 2A, 2.8MHZ STEP-DOWN SWITCHING REGULATOR WITH 50ΜA QUIESCENT CURRENT

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Technical Specifications

Parameters and characteristics for this part

Specification	LT3481EMSE#PBF

Current - Output	2 A
Frequency - Switching [Max]	2.8 MHz
Frequency - Switching [Min]	300 kHz
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	3 Lead, 0.118 in
Package / Case	Exposed Pad, 10-TFSOP, 10-MSOP
Supplier Device Package	10-MSOP-EP
Synchronous Rectifier	False
Topology	Buck
Voltage - Input (Max) [Max]	34 V
Voltage - Input (Min) [Min]	3.6 V
Voltage - Output (Max) [Max]	20 V
Voltage - Output (Min/Fixed)	1.265 V

LT3481 Series

Part	Topology	Number of Outputs	Function	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Voltage - Input (Min) [Min]	Frequency - Switching [Max]	Frequency - Switching [Min]	Mounting Type	Output Type	Voltage - Output (Max) [Max]	Output Configuration	Current - Output	Voltage - Input (Max) [Max]	Voltage - Output (Min/Fixed)	Package / Case	Package / Case
Analog Devices LT3481IMSE	Buck	1	Step-Down	125 °C	-40 °C	10-MSOP-EP	3.6 V	2.8 MHz	300 kHz	Surface Mount	Adjustable	20 V	Positive	2 A	34 V	1.265 V	0.118 in 3 Lead	10-MSOP 10-TFSOP Exposed Pad
Analog Devices LT3481IMSE#TRPBF	Buck	1	Step-Down	125 ¯C	-40 °C	10-MSOP-EP	3.6 V	2.8 MHz	300 kHz	Surface Mount	Adjustable	20 V	Positive	2 A	34 V	1.265 V	0.118 in 3 Lead	10-MSOP 10-TFSOP Exposed Pad
Analog Devices LT3481IDD#TRPBF	Buck	1	Step-Down	125 ¯C	-40 °C	10-DFN (3x3)	3.6 V	2.8 MHz	300 kHz	Surface Mount	Adjustable	20 V	Positive	2 A	34 V	1.265 V		10-WFDFN Exposed Pad
Analog Devices LT3481EMSE#PBF	Buck	1	Step-Down	85 °C	-40 °C	10-MSOP-EP	3.6 V	2.8 MHz	300 kHz	Surface Mount	Adjustable	20 V	Positive	2 A	34 V	1.265 V	0.118 in 3 Lead	10-MSOP 10-TFSOP Exposed Pad
Analog Devices LT3481HMSE#TRPBF	Buck	1	Step-Down	150 °C	-40 °C	10-MSOP-EP	3.6 V	2.8 MHz	300 kHz	Surface Mount	Adjustable	20 V	Positive	2 A	34 V	1.265 V	0.118 in 3 Lead	10-MSOP 10-TFSOP Exposed Pad
Analog Devices LT3481EDD#PBF	Buck	1	Step-Down	85 °C	-40 °C	10-DFN (3x3)	3.6 V	2.8 MHz	300 kHz	Surface Mount	Adjustable	20 V	Positive	2 A	34 V	1.265 V		10-WFDFN Exposed Pad
Analog Devices LT3481HDD#TRPBF	Buck	1	Step-Down	150 °C	-40 °C	10-DFN (3x3)	3.6 V	2.8 MHz	300 kHz	Surface Mount	Adjustable	20 V	Positive	2 A	34 V	1.265 V		10-WFDFN Exposed Pad

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	$ 10.45
		10	$ 7.12
		50	$ 5.71
		100	$ 5.26
		250	$ 4.86

Description

General part information

LT3481 Series

The LT3481 is an adjustable frequency (300kHz to 2.8MHz) monolithic buck switching regulator that accepts input voltages up to 34V (36V maximum). A high efﬁciency 0.18Ω switch is included on the die along with a boost Schottky diode and the necessary oscillator, control, and logic circuitry. Current mode topology is used for fast transient response and good loop stability. Low ripple Burst Mode operation maintains high efﬁciency at low output currents while keeping output ripple below 15mV in a typical application. In addition, the LT3481 can further enhance low output current efﬁciency by drawing bias current from the output when VOUTis above 3V. Shutdown reduces input supply current to less than 1µA while a resistor and capacitor on the RUN/SS pin provide a controlled output voltage ramp (soft-start). A power good ﬂag signals when VOUTreaches 90% of the programmed output voltage. The LT3481 is available in 10-Pin MSOP and 3mm × 3mm DFN packages with exposed pads for low thermal resistance.ApplicationsAutomotive Battery RegulationPower for Portable ProductsDistributed Supply RegulationIndustrial SuppliesWall Transformer Regulation

Documents

Technical documentation and resources

R530 Reliability Data

Reliability Data

Datasheet

LTpowerPlanner III Quick Start Guide

Datasheet