Specification	LT3973EDD-3.3#TRPBF

Current - Output	750 mA
Frequency - Switching [Max]	2.15 MHz
Frequency - Switching [Min]	195 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-40 C
Output Configuration	Positive
Package / Case	10-WFDFN Exposed Pad
Supplier Device Package	10-DFN (3x3)
Synchronous Rectifier	False
Topology	Buck
Voltage - Input (Max) [Max]	42 V
Voltage - Input (Min) [Min]	4.2 V
Voltage - Output (Min/Fixed)	3.3 V

LT3973 Series

Part	Number of Outputs	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Output (Max) [Max]	Package / Case	Mounting Type	Current - Output	Output Type	Frequency - Switching [Max]	Frequency - Switching [Min]	Supplier Device Package	Output Configuration	Voltage - Input (Max) [Max]	Voltage - Input (Min) [Min]	Topology	Voltage - Output (Min/Fixed)	Function
Analog Devices Inc./Maxim Integrated LT3973IMSE#PBF	1	-40 C	125 °C	24 V	10-MSOP 10-TFSOP Exposed Pad	Surface Mount	750 mA	Adjustable	2.15 MHz	195 kHz	10-MSOP-EP	Positive	42 V	4.2 V	Buck	1.21 V	Step-Down
Analog Devices Inc./Maxim Integrated LT3973IDD#TRPBF	1	-40 C	125 °C	24 V	10-WFDFN Exposed Pad	Surface Mount	750 mA	Adjustable	2.15 MHz	195 kHz	10-DFN (3x3)	Positive	42 V	4.2 V	Buck	1.21 V	Step-Down
Analog Devices Inc./Maxim Integrated LT3973HDD-5#TRPBF	1	-40 °C	150 °C		10-WFDFN Exposed Pad	Surface Mount	750 mA		2.15 MHz	195 kHz	10-DFN (3x3)	Positive	42 V	4.2 V	Buck	5 V	Step-Down
Analog Devices Inc./Maxim Integrated LT3973EMSE-5#PBF	1	-40 C	125 °C		10-MSOP 10-TFSOP Exposed Pad	Surface Mount	750 mA		2.15 MHz	195 kHz	10-MSOP-EP	Positive	42 V	4.2 V	Buck	5 V	Step-Down
Analog Devices Inc./Maxim Integrated LT3973HDD#PBF	1	-40 °C	150 °C	24 V	10-WFDFN Exposed Pad	Surface Mount	750 mA	Adjustable	2.15 MHz	195 kHz	10-DFN (3x3)	Positive	42 V	4.2 V	Buck	1.21 V	Step-Down
Analog Devices Inc./Maxim Integrated LT3973EDD#PBF	1	-40 C	125 °C	24 V	10-WFDFN Exposed Pad	Surface Mount	750 mA	Adjustable	2.15 MHz	195 kHz	10-DFN (3x3)	Positive	42 V	4.2 V	Buck	1.21 V	Step-Down
Analog Devices Inc./Maxim Integrated LT3973EDD-3.3#TRPBF	1	-40 C	125 °C		10-WFDFN Exposed Pad	Surface Mount	750 mA		2.15 MHz	195 kHz	10-DFN (3x3)	Positive	42 V	4.2 V	Buck	3.3 V	Step-Down
Analog Devices Inc./Maxim Integrated LT3973HMSE#PBF	1	-40 °C	150 °C	24 V	10-MSOP 10-TFSOP Exposed Pad	Surface Mount	750 mA	Adjustable	2.15 MHz	195 kHz	10-MSOP-EP	Positive	42 V	4.2 V	Buck	1.21 V	Step-Down
Analog Devices Inc./Maxim Integrated LT3973EDD-5#TRPBF	1	-40 C	125 °C		10-WFDFN Exposed Pad	Surface Mount	750 mA		2.15 MHz	195 kHz	10-DFN (3x3)	Positive	42 V	4.2 V	Buck	5 V	Step-Down
Analog Devices Inc./Maxim Integrated LT3973IDD-5#PBF	1	-40 C	125 °C		10-WFDFN Exposed Pad	Surface Mount	750 mA		2.15 MHz	195 kHz	10-DFN (3x3)	Positive	42 V	4.2 V	Buck	5 V	Step-Down

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$	Updated

Digikey	N/A	0	$ 4.14	1m+

Description

General part information

LT3973 Series

The LT3973 is an adjustable frequency monolithic buck switching regulator that accepts a wide input voltage range up to 42V, and consumes only 2.5μA of quiescent current. A high efficiency switch is included on the die along with the catch diode, boost diode, and the necessary oscillator, control and logic circuitry. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping the output ripple below 10mV in a typical application. A minimum dropout voltage of 530mV is maintained when the input voltage drops below the programmed output voltage, such as during automotive cold crank. Current mode topology is used for fast transient response and good loop stability. A catch diode current limit provides protection against shorted outputs and overvoltage conditions, with thermal shutdown providing additional fault protection. An accurate programmable undervoltage lockout feature is available, producing a low shutdown current of 0.75μA. A power good flag signals when VOUTreaches 90% of the programmed output voltage. The LT3973 is available in small, thermally enhanced 10-lead MSOP and 3mm × 3mm DFN packages.ApplicationsAutomotive Battery RegulationPower for Portable ProductsIndustrial SuppliesGate Drive Bias

Documents

Technical documentation and resources

R530 Reliability Data

Reliability Data

LT3973EDD-3.3#TRPBF | Datasheet

Datasheet