Datasheet Linear Technology LT3481

Manufacturer	Linear Technology
Series	LT3481

36V, 2A, 2.8MHz Step-Down Switching Regulator with 50µA Quiescent Current

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PDF, 315 Kb, Language: en, File uploaded: Sep 18, 2017, Pages: 24
36V, 2A, 2.8MHz Step-Down Switching Regulator with 50µA Quiescent Current

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Packaging

	LT3481EDD#PBF	LT3481EDD#TRPBF	LT3481EMSE#PBF	LT3481EMSE#TRPBF	LT3481HDD#PBF	LT3481HDD#TRPBF	LT3481HMSE#PBF	LT3481HMSE#TRPBF	LT3481IDD#PBF	LT3481IDD#TRPBF	LT3481IMSE#PBF	LT3481IMSE#TRPBF
N	1	2	3	4	5	6	7	8	9	10	11	12
Package	3x3 DFN-10 Package Outline Drawing	3x3 DFN-10 Package Outline Drawing	MS-10E Package Outline Drawing	MS-10E Package Outline Drawing	3x3 DFN-10 Package Outline Drawing	3x3 DFN-10 Package Outline Drawing	MS-10E Package Outline Drawing	MS-10E Package Outline Drawing	3x3 DFN-10 Package Outline Drawing	3x3 DFN-10 Package Outline Drawing	MS-10E Package Outline Drawing	MS-10E Package Outline Drawing
Package Code	DD	DD	MSE	MSE	DD	DD	MSE	MSE	DD	DD	MSE	MSE
Package Index	05-08-1699	05-08-1699	05-08-1664	05-08-1664	05-08-1699	05-08-1699	05-08-1664	05-08-1664	05-08-1699	05-08-1699	05-08-1664	05-08-1664
Pin Count	10	10	10	10	10	10	10	10	10	10	10	10

Parametrics

Parameters / Models	LT3481EDD#PBF	LT3481EDD#TRPBF	LT3481EMSE#PBF	LT3481EMSE#TRPBF	LT3481HDD#PBF	LT3481HDD#TRPBF	LT3481HMSE#PBF	LT3481HMSE#TRPBF	LT3481IDD#PBF	LT3481IDD#TRPBF	LT3481IMSE#PBF	LT3481IMSE#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC857A	DC857A	DC857A	DC857A	DC857A	DC857A	DC857A	DC857A	DC857A	DC857A	DC857A	DC857A
Design Tools	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model
Export Control	no	no	no	no	no	no	no	no	no	no	no	no
Features	Burst Mode, Resistor Set Frequency, External Synchronization, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Power Good
Frequency, kHz	2800	2800	2800	2800	2800	2800	2800	2800	2800	2800	2800	2800
Frequency Adjust Range	300kHz - 2.8MHz	300kHz - 2.8MHz	300kHz - 2.8MHz	300kHz - 2.8MHz	300kHz - 2.8MHz	300kHz - 2.8MHz	300kHz - 2.8MHz	300kHz - 2.8MHz	300kHz - 2.8MHz	300kHz - 2.8MHz	300kHz - 2.8MHz	300kHz - 2.8MHz
Frequency Sync Range	275kHz - 475kHz	275kHz - 475kHz	275kHz - 475kHz	275kHz - 475kHz	275kHz - 475kHz	275kHz - 475kHz	275kHz - 475kHz	275kHz - 475kHz	275kHz - 475kHz	275kHz - 475kHz	275kHz - 475kHz	275kHz - 475kHz
Integrated Inductor	no	no	no	no	no	no	no	no	no	no	no	no
Ishutdown, µA	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.01
Isupply, mA	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05
Max Phases	1	1	1	1	1	1	1	1	1	1	1	1
Monolithic	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes
Number of Outputs	1	1	1	1	1	1	1	1	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	0 to 85	0 to 85	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Output Current, A	2	2	2	2	2	2	2	2	2	2	2	2
Polyphase	no	no	no	no	no	no	no	no	no	no	no	no
Switch Current, A	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8
Synchronous	no	no	no	no	no	no	no	no	no	no	no	no
Topology	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck
Vin Max, V	36	36	36	36	36	36	36	36	36	36	36	36
Vin Min, V	3.6	3.6	3.6	3.6	3.6	3.6	3.6	3.6	3.6	3.6	3.6	3.6
Vout Max, V	20	20	20	20	20	20	20	20	20	20	20	20
Vout Maximum	20V	20V	20V	20V	20V	20V	20V	20V	20V	20V	20V	20V
Vout Min, V	1.265	1.265	1.265	1.265	1.265	1.265	1.265	1.265	1.265	1.265	1.265	1.265

Eco Plan

	LT3481EDD#PBF	LT3481EDD#TRPBF	LT3481EMSE#PBF	LT3481EMSE#TRPBF	LT3481HDD#PBF	LT3481HDD#TRPBF	LT3481HMSE#PBF	LT3481HMSE#TRPBF	LT3481IDD#PBF	LT3481IDD#TRPBF	LT3481IMSE#PBF	LT3481IMSE#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Design Notes

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Tiny Monolithic Step-Down Regulators Operate with Wide Input Range &mdash DN390
PDF, 158 Kb, File published: Apr 18, 2006
Extract from the document
advertisement Tiny Monolithic Step-Down Regulators Operate with
Wide Input Range вЂ“ Design Note 390
Kevin Huang
Introduction
Automotive batteries, industrial power supplies, distributed supplies and wall transformers are all sources of
wide-ranging high voltage inputs. The easiest way to step
down these sources is with a high voltage monolithic
step-down regulator that can directly accept a wide input
range and produce a well-regulated output. The LTВ® 3493
accepts inputs from 3.6V to 36V and LT3481 accepts
inputs from 3.6V to 34V. Both provide excellent line
and load regulation and dynamic response. The LT3481
offers a high efп¬Ѓciency solution over a wide load range and
keeps the output ripple low during Burst ModeВ® operation
while the LT3493 provides a tiny solution with minimal
external components. The LT3493 operates at 750kHz
and the LT3481 has adjustable frequency from 300kHz
to 2.8MHz. High frequency operation enables the use of
small, low cost inductors and ceramic capacitors.
Low Ripple and High Efп¬Ѓciency Solution over Wide
Load Range
The LT3481 is available in a 10-pin MSOP or a 3mm Г—
3mm DFN package with an integrated 3.8A power switch …

Model Line

Series: LT3481 (12)

LT3481EDD#PBF LT3481EDD#TRPBF LT3481EMSE#PBF LT3481EMSE#TRPBF LT3481HDD#PBF LT3481HDD#TRPBF LT3481HMSE#PBF LT3481HMSE#TRPBF LT3481IDD#PBF LT3481IDD#TRPBF LT3481IMSE#PBF LT3481IMSE#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Step-Down (Buck) Regulators > Micropower Buck Regulators | Internal Power Switch Buck
Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) Switching Regulators