Datasheet Linear Technology LT3971-3.3

Manufacturer	Linear Technology
Series	LT3971-3.3

38V, 1.2A, 2MHz Step-Down Regulator with 2.8µA Quiescent Current

Datasheets

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PDF, 643 Kb, Language: en, File uploaded: Sep 19, 2017, Pages: 28
38V, 1.2A, 2MHz Step-Down Regulator with 2.8μA Quiescent Current

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Packaging

	LT3971EDD-3.3#PBF	LT3971EDD-3.3#TRPBF	LT3971EMSE-3.3#PBF	LT3971EMSE-3.3#TRPBF	LT3971IDD-3.3#PBF	LT3971IDD-3.3#TRPBF	LT3971IMSE-3.3#PBF	LT3971IMSE-3.3#TRPBF
N	1	2	3	4	5	6	7	8
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
Package Code	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
Pin Count	10	10	10	10	10	10	10	10

Parametrics

Parameters / Models	LT3971EDD-3.3#PBF	LT3971EDD-3.3#TRPBF	LT3971EMSE-3.3#PBF	LT3971EMSE-3.3#TRPBF	LT3971IDD-3.3#PBF	LT3971IDD-3.3#TRPBF	LT3971IMSE-3.3#PBF	LT3971IMSE-3.3#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
Demo Boards	DC1527A	DC1527A	DC1527A	DC1527A	DC1527A	DC1527A	DC1527A	DC1527A
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
Export Control	no	no	no	no	no	no	no	no
Features	Burst Mode, Resistor Set Frequency, External Synchronization, Fixed Output	Burst Mode, Resistor Set Frequency, External Synchronization, Fixed Output	Burst Mode, Resistor Set Frequency, External Synchronization, Fixed Output	Burst Mode, Resistor Set Frequency, External Synchronization, Fixed Output	Burst Mode, Resistor Set Frequency, External Synchronization, Fixed Output	Burst Mode, Resistor Set Frequency, External Synchronization, Fixed Output	Burst Mode, Resistor Set Frequency, External Synchronization, Fixed Output	Burst Mode, Resistor Set Frequency, External Synchronization, Fixed Output
Frequency, kHz	2000	2000	2000	2000	2000	2000	2000	2000
Frequency Adjust Range	200kHz - 2MHz	200kHz - 2MHz	200kHz - 2MHz	200kHz - 2MHz	200kHz - 2MHz	200kHz - 2MHz	200kHz - 2MHz	200kHz - 2MHz
Frequency Sync Range	250kHz - 2MHz	250kHz - 2MHz	250kHz - 2MHz	250kHz - 2MHz	250kHz - 2MHz	250kHz - 2MHz	250kHz - 2MHz	250kHz - 2MHz
Integrated Inductor	no	no	no	no	no	no	no	no
Ishutdown, µA	0.7	0.7	0.7	0.7	0.7	0.7	0.7	0.7
Isupply, mA	0.0017	0.0017	0.0017	0.0017	0.0017	0.0017	0.0017	0.0017
Max Phases	1	1	1	1	1	1	1	1
Monolithic	yes	yes	yes	yes	yes	yes	yes	yes
Number of Outputs	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 85	-40 to 85	-40 to 85	-40 to 85
Output Current, A	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2
Polyphase	no	no	no	no	no	no	no	no
Switch Current, A	2.4	2.4	2.4	2.4	2.4	2.4	2.4	2.4
Synchronous	no	no	no	no	no	no	no	no
Topology	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck
Vin Max, V	38	38	38	38	38	38	38	38
Vin Min, V	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3
Vout Max, V	3.3	3.3	3.3	3.3	3.3	3.3	3.3	3.3
Vout Maximum	3.3V	3.3V	3.3V	3.3V	3.3V	3.3V	3.3V	3.3V
Vout Min, V	3.3	3.3	3.3	3.3	3.3	3.3	3.3	3.3
Vref Accuracy Over Temp, %	2.1	2.1	2.1	2.1	2.1	2.1	2.1	2.1

Eco Plan

	LT3971EDD-3.3#PBF	LT3971EDD-3.3#TRPBF	LT3971EMSE-3.3#PBF	LT3971EMSE-3.3#TRPBF	LT3971IDD-3.3#PBF	LT3971IDD-3.3#TRPBF	LT3971IMSE-3.3#PBF	LT3971IMSE-3.3#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Other Options

LT3971 LT3971 LT3971-5

Articles

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1.2A Buck Converters Draw Only 2.8µA When Regulating Zero Load, Accept 38VIN or 55VIN &mdash LT Journal
PDF, 955 Kb, File published: Dec 1, 2009
Extract from the document
LINEAR TECHNOLOGY DECEMBER 2009 IN THIS ISSUEвЂ¦
COVER ARTICLE
1.2A Buck Converters Draw Only 2.8ВµA
When Regulating Zero Load, Accept
38VIN or 55VIN.1
John Gardner Linear in the News.2
DESIGN FEATURES
775 Nanovolt Noise Measurement
for a Low Noise Voltage Reference
.6
Jim Williams Monolithic Synchronous Step-Down
Regulator Sources 3A or Sinks 1.5A
in TSSOP or 3mm Г— 4mm QFN.10
Genesia Bertelle Designing a Solar Cell
Battery Charger.12
Jim Drew High Current/High Speed LED Driver
Revolutionizes PWM Dimming.16
Josh Caldwell Produce High DC/DC Step-Down Ratios
in Tight Spaces with 30ns Minimum
On-Time Controller in 3mm Г— 3mm QFN
.20
Theo Phillips New Generation of 14-Bit 150Msps
ADCs Dissipates a Third the Power …

Model Line

Series: LT3971-3.3 (8)

LT3971EDD-3.3#PBF LT3971EDD-3.3#TRPBF LT3971EMSE-3.3#PBF LT3971EMSE-3.3#TRPBF LT3971IDD-3.3#PBF LT3971IDD-3.3#TRPBF LT3971IMSE-3.3#PBF LT3971IMSE-3.3#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Step-Down (Buck) Regulators > Micropower Buck Regulators | Internal Power Switch Buck | High Input Voltage Buck