Datasheet Linear Technology LT3973

Manufacturer	Linear Technology
Series	LT3973

42V, 750mA Step-Down Regulator with 2.5µA Quiescent Current and Integrated Diodes

Datasheets

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42V, 750mA Step-Down Regulator with 2.5μA Quiescent Current and Integrated Diodes

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Packaging

	LT3973EDD#PBF	LT3973EDD#TRPBF	LT3973EDD-3.3#PBF	LT3973EDD-3.3#TRPBF	LT3973EDD-5#PBF	LT3973EDD-5#TRPBF	LT3973EMSE#PBF	LT3973EMSE#TRPBF	LT3973EMSE-3.3#PBF	LT3973EMSE-3.3#TRPBF	LT3973EMSE-5#PBF	LT3973EMSE-5#TRPBF	LT3973HDD#PBF	LT3973HDD#TRPBF	LT3973HDD-3.3#PBF	LT3973HDD-3.3#TRPBF	LT3973HDD-5#PBF	LT3973HDD-5#TRPBF	LT3973HMSE#PBF	LT3973HMSE#TRPBF	LT3973HMSE-3.3#PBF	LT3973HMSE-3.3#TRPBF	LT3973HMSE-5#PBF	LT3973HMSE-5#TRPBF	LT3973IDD#PBF	LT3973IDD#TRPBF	LT3973IDD-3.3#PBF	LT3973IDD-3.3#TRPBF	LT3973IDD-5#PBF	LT3973IDD-5#TRPBF	LT3973IMSE#PBF	LT3973IMSE#TRPBF	LT3973IMSE-3.3#PBF	LT3973IMSE-3.3#TRPBF	LT3973IMSE-5#PBF	LT3973IMSE-5#TRPBF
N	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	32	33	34	35	36
Package	3x3 DFN-10 Package Outline Drawing	3x3 DFN-10 Package Outline Drawing	3x3 DFN-10 Package Outline Drawing	3x3 DFN-10 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	3x3 DFN-10 Package Outline Drawing	3x3 DFN-10 Package Outline Drawing	3x3 DFN-10 Package Outline Drawing	3x3 DFN-10 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	3x3 DFN-10 Package Outline Drawing	3x3 DFN-10 Package Outline Drawing	3x3 DFN-10 Package Outline Drawing	3x3 DFN-10 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	DD	DD	DD	DD	MSE	MSE	MSE	MSE	MSE	MSE	DD	DD	DD	DD	DD	DD	MSE	MSE	MSE	MSE	MSE	MSE	DD	DD	DD	DD	DD	DD	MSE	MSE	MSE	MSE	MSE	MSE
Package Index	05-08-1699	05-08-1699	05-08-1699	05-08-1699	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	05-08-1699	05-08-1699	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	05-08-1699	05-08-1699	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	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10

Parametrics

Parameters / Models	LT3973EDD#PBF	LT3973EDD#TRPBF	LT3973EDD-3.3#PBF	LT3973EDD-3.3#TRPBF	LT3973EDD-5#PBF	LT3973EDD-5#TRPBF	LT3973EMSE#PBF	LT3973EMSE#TRPBF	LT3973EMSE-3.3#PBF	LT3973EMSE-3.3#TRPBF	LT3973EMSE-5#PBF	LT3973EMSE-5#TRPBF	LT3973HDD#PBF	LT3973HDD#TRPBF	LT3973HDD-3.3#PBF	LT3973HDD-3.3#TRPBF	LT3973HDD-5#PBF	LT3973HDD-5#TRPBF	LT3973HMSE#PBF	LT3973HMSE#TRPBF	LT3973HMSE-3.3#PBF	LT3973HMSE-3.3#TRPBF	LT3973HMSE-5#PBF	LT3973HMSE-5#TRPBF	LT3973IDD#PBF	LT3973IDD#TRPBF	LT3973IDD-3.3#PBF	LT3973IDD-3.3#TRPBF	LT3973IDD-5#PBF	LT3973IDD-5#TRPBF	LT3973IMSE#PBF	LT3973IMSE#TRPBF	LT3973IMSE-3.3#PBF	LT3973IMSE-3.3#TRPBF	LT3973IMSE-5#PBF	LT3973IMSE-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	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	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A	DC1730A
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	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	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	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no
Features	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good	Burst Mode, Resistor Set Frequency, Power Good
Frequency, kHz	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200
Frequency Adjust Range	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz
Integrated Inductor	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no
Ishutdown, µA	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12
Isupply, mA	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025
Max Phases	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	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	yes	yes	yes	yes	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	1	1	1	1	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	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 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 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	-40 to 85	-40 to 85	-40 to 85
Output Current, A	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75
Polyphase	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no
Switch Current, A	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65	1.65
Synchronous	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	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	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck
Vin Max, V	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42
Vin Min, V	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2
Vout Max, V	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24
Vout Maximum	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin
Vout Min, V	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21	1.21
Vref Accuracy Over Temp, %	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2

Eco Plan

	LT3973EDD#PBF	LT3973EDD#TRPBF	LT3973EDD-3.3#PBF	LT3973EDD-3.3#TRPBF	LT3973EDD-5#PBF	LT3973EDD-5#TRPBF	LT3973EMSE#PBF	LT3973EMSE#TRPBF	LT3973EMSE-3.3#PBF	LT3973EMSE-3.3#TRPBF	LT3973EMSE-5#PBF	LT3973EMSE-5#TRPBF	LT3973HDD#PBF	LT3973HDD#TRPBF	LT3973HDD-3.3#PBF	LT3973HDD-3.3#TRPBF	LT3973HDD-5#PBF	LT3973HDD-5#TRPBF	LT3973HMSE#PBF	LT3973HMSE#TRPBF	LT3973HMSE-3.3#PBF	LT3973HMSE-3.3#TRPBF	LT3973HMSE-5#PBF	LT3973HMSE-5#TRPBF	LT3973IDD#PBF	LT3973IDD#TRPBF	LT3973IDD-3.3#PBF	LT3973IDD-3.3#TRPBF	LT3973IDD-5#PBF	LT3973IDD-5#TRPBF	LT3973IMSE#PBF	LT3973IMSE#TRPBF	LT3973IMSE-3.3#PBF	LT3973IMSE-3.3#TRPBF	LT3973IMSE-5#PBF	LT3973IMSE-5#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Model Line

Series: LT3973 (36)

LT3973EDD#PBF LT3973EDD#TRPBF LT3973EDD-3.3#PBF LT3973EDD-3.3#TRPBF LT3973EDD-5#PBF LT3973EDD-5#TRPBF LT3973EMSE#PBF LT3973EMSE#TRPBF LT3973EMSE-3.3#PBF LT3973EMSE-3.3#TRPBF LT3973EMSE-5#PBF LT3973EMSE-5#TRPBF LT3973HDD#PBF LT3973HDD#TRPBF LT3973HDD-3.3#PBF LT3973HDD-3.3#TRPBF LT3973HDD-5#PBF LT3973HDD-5#TRPBF LT3973HMSE#PBF LT3973HMSE#TRPBF LT3973HMSE-3.3#PBF LT3973HMSE-3.3#TRPBF LT3973HMSE-5#PBF LT3973HMSE-5#TRPBF LT3973IDD#PBF LT3973IDD#TRPBF LT3973IDD-3.3#PBF LT3973IDD-3.3#TRPBF LT3973IDD-5#PBF LT3973IDD-5#TRPBF LT3973IMSE#PBF LT3973IMSE#TRPBF LT3973IMSE-3.3#PBF LT3973IMSE-3.3#TRPBF LT3973IMSE-5#PBF LT3973IMSE-5#TRPBF

Manufacturer's Classification

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