Datasheet Linear Technology LT3991

Manufacturer	Linear Technology
Series	LT3991

55V, 1.2A Step-Down Regulator with 2.8µA Quiescent Current

Datasheets

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PDF, 398 Kb, Language: en, File uploaded: Sep 19, 2017, Pages: 24
55V, 1.2A Step-Down Regulator with 2.8μA Quiescent Current

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Prices

Packaging

	LT3991EDD#PBF	LT3991EDD#TRPBF	LT3991EMSE#PBF	LT3991EMSE#TRPBF	LT3991EMSE-3.3#PBF	LT3991EMSE-3.3#TRPBF	LT3991EMSE-5#PBF	LT3991EMSE-5#TRPBF	LT3991IDD#PBF	LT3991IDD#TRPBF	LT3991IMSE#PBF	LT3991IMSE#TRPBF	LT3991IMSE-3.3#PBF	LT3991IMSE-3.3#TRPBF	LT3991IMSE-5#PBF	LT3991IMSE-5#TRPBF
N	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16
Package	3x3 DFN-10 Package Outline Drawing	3x3 DFN-10 Package Outline Drawing	MS-10E Package Outline Drawing	MS-10E Package Outline Drawing	MS-10E Package Outline Drawing	MS-10E 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	MS-10E Package Outline Drawing	MS-10E Package Outline Drawing	MS-10E Package Outline Drawing	MS-10E Package Outline Drawing
Package Code	DD	DD	MSE	MSE	MSE	MSE	MSE	MSE	DD	DD	MSE	MSE	MSE	MSE	MSE	MSE
Package Index	05-08-1699	05-08-1699	05-08-1664	05-08-1664	05-08-1664	05-08-1664	05-08-1664	05-08-1664	05-08-1699	05-08-1699	05-08-1664	05-08-1664	05-08-1664	05-08-1664	05-08-1664	05-08-1664
Pin Count	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10

Parametrics

Parameters / Models	LT3991EDD#PBF	LT3991EDD#TRPBF	LT3991EMSE#PBF	LT3991EMSE#TRPBF	LT3991EMSE-3.3#PBF	LT3991EMSE-3.3#TRPBF	LT3991EMSE-5#PBF	LT3991EMSE-5#TRPBF	LT3991IDD#PBF	LT3991IDD#TRPBF	LT3991IMSE#PBF	LT3991IMSE#TRPBF	LT3991IMSE-3.3#PBF	LT3991IMSE-3.3#TRPBF	LT3991IMSE-5#PBF	LT3991IMSE-5#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	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC1526A	DC1526A	DC1526A	DC1526A	DC1526A	DC1526A	DC1526A	DC1526A	DC1526A	DC1526A	DC1526A	DC1526A	DC1526A	DC1526A	DC1526A	DC1526A
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	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	no	no	no	no
Features	Burst Mode, Resistor Set Frequency, External Synchronization	Burst Mode, Resistor Set Frequency, External Synchronization	Burst Mode, Resistor Set Frequency, External Synchronization	Burst Mode, Resistor Set Frequency, External Synchronization	Burst Mode, Resistor Set Frequency, External Synchronization	Burst Mode, Resistor Set Frequency, External Synchronization	Burst Mode, Resistor Set Frequency, External Synchronization	Burst Mode, Resistor Set Frequency, External Synchronization	Burst Mode, Resistor Set Frequency, External Synchronization	Burst Mode, Resistor Set Frequency, External Synchronization	Burst Mode, Resistor Set Frequency, External Synchronization	Burst Mode, Resistor Set Frequency, External Synchronization	Burst Mode, Resistor Set Frequency, External Synchronization	Burst Mode, Resistor Set Frequency, External Synchronization	Burst Mode, Resistor Set Frequency, External Synchronization	Burst Mode, Resistor Set Frequency, External Synchronization
Frequency, kHz	2000	2000	2000	2000	2000	2000	2000	2000	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	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	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	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	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	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	1	1	1	1	1	1	1	1
Monolithic	yes	yes	yes	yes	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	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	0 to 85	0 to 85	0 to 85	0 to 85	0 to 85	0 to 85	-40 to 85	-40 to 85	-40 to 85	-40 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	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	no	no	no	no	no	no	no	no
Switch Current, A	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3
Synchronous	no	no	no	no	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	Buck	Buck	Buck	Buck
Vin Max, V	55	55	55	55	55	55	55	55	55	55	55	55	55	55	55	55
Vin Min, V	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3
Vout Max, V	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30
Vout Maximum	30V	30V	30V	30V	30V	30V	30V	30V	30V	30V	30V	30V	30V	30V	30V	30V
Vout Min, V	1.19	1.19	1.19	1.19	1.19	1.19	1.19	1.19	1.19	1.19	1.19	1.19	1.19	1.19	1.19	1.19
Vref Accuracy Over Temp, %	2.1	2.1	2.1	2.1	2.1	2.1	2.1	2.1	2.1	2.1	2.1	2.1	2.1	2.1	2.1	2.1

Eco Plan

	LT3991EDD#PBF	LT3991EDD#TRPBF	LT3991EMSE#PBF	LT3991EMSE#TRPBF	LT3991EMSE-3.3#PBF	LT3991EMSE-3.3#TRPBF	LT3991EMSE-5#PBF	LT3991EMSE-5#TRPBF	LT3991IDD#PBF	LT3991IDD#TRPBF	LT3991IMSE#PBF	LT3991IMSE#TRPBF	LT3991IMSE-3.3#PBF	LT3991IMSE-3.3#TRPBF	LT3991IMSE-5#PBF	LT3991IMSE-5#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

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: LT3991 (16)

LT3991EDD#PBF LT3991EDD#TRPBF LT3991EMSE#PBF LT3991EMSE#TRPBF LT3991EMSE-3.3#PBF LT3991EMSE-3.3#TRPBF LT3991EMSE-5#PBF LT3991EMSE-5#TRPBF LT3991IDD#PBF LT3991IDD#TRPBF LT3991IMSE#PBF LT3991IMSE#TRPBF LT3991IMSE-3.3#PBF LT3991IMSE-3.3#TRPBF LT3991IMSE-5#PBF LT3991IMSE-5#TRPBF

Manufacturer's Classification

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