LT3973IDD#TRPBF
Active42V, 750MA STEP-DOWN REGULATOR WITH 2.5ΜA QUIESCENT CURRENT AND INTEGRATED DIODES
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LT3973IDD#TRPBF
Active42V, 750MA STEP-DOWN REGULATOR WITH 2.5ΜA QUIESCENT CURRENT AND INTEGRATED DIODES
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Technical Specifications
Parameters and characteristics for this part
| Specification | LT3973IDD#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 |
| Output Type | Adjustable |
| 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 (Max) | 24 V |
| Voltage - Output (Min/Fixed) | 1.21 V |
LT3973 Series
42V, 750mA Step-Down Regulator with 2.5μA Quiescent Current and Integrated Diodes
| Part | Current - Output | Function | Voltage - Output (Max) | Output Type | Synchronous Rectifier | Voltage - Input (Max) [Max] | Package / Case | Operating Temperature [Min] | Operating Temperature [Max] | Supplier Device Package | Number of Outputs | Topology | Voltage - Output (Min/Fixed) | Output Configuration | Frequency - Switching [Min] | Frequency - Switching [Max] | Voltage - Input (Min) [Min] | Mounting Type | Output Type | Package / Case |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Analog Devices | 750 mA | Step-Down | 24 V | Adjustable | 42 V | 10-WFDFN Exposed Pad | -40 °C | 125 ¯C | 10-DFN (3x3) | 1 | Buck | 1.21 V | Positive | 195 kHz | 2.15 MHz | 4.2 V | Surface Mount | |||
Analog Devices | 750 mA | Step-Down | 42 V | 10-WFDFN Exposed Pad | -40 °C | 150 °C | 10-DFN (3x3) | 1 | Buck | 5 V | Positive | 195 kHz | 2.15 MHz | 4.2 V | Surface Mount | 1.81 mOhm | ||||
Analog Devices | 750 mA | Step-Down | 24 V | Adjustable | 42 V | 10-MSOP 10-TFSOP Exposed Pad | -40 °C | 150 °C | 10-MSOP-EP | 1 | Buck | 1.21 V | Positive | 195 kHz | 2.15 MHz | 4.2 V | Surface Mount | 0.118 in 3 Lead | ||
Analog Devices | 750 mA | Step-Down | 24 V | Adjustable | 42 V | 10-MSOP 10-TFSOP Exposed Pad | -40 °C | 125 ¯C | 10-MSOP-EP | 1 | Buck | 1.21 V | Positive | 195 kHz | 2.15 MHz | 4.2 V | Surface Mount | 0.118 in 3 Lead | ||
Analog Devices | 750 mA | Step-Down | 42 V | 10-MSOP 10-TFSOP Exposed Pad | -40 °C | 125 ¯C | 10-MSOP-EP | 1 | Buck | 3.3 V | Positive | 195 kHz | 2.15 MHz | 4.2 V | Surface Mount | 1.81 mOhm | 0.118 in 3 Lead | |||
Analog Devices | 750 mA | Step-Down | 24 V | Adjustable | 42 V | 10-WFDFN Exposed Pad | -40 °C | 125 ¯C | 10-DFN (3x3) | 1 | Buck | 1.21 V | Positive | 195 kHz | 2.15 MHz | 4.2 V | Surface Mount | |||
Analog Devices | 750 mA | Step-Down | 42 V | 10-MSOP 10-TFSOP Exposed Pad | -40 °C | 125 ¯C | 10-MSOP-EP | 1 | Buck | 5 V | Positive | 195 kHz | 2.15 MHz | 4.2 V | Surface Mount | 1.81 mOhm | 0.118 in 3 Lead | |||
Analog Devices | 750 mA | Step-Down | 42 V | 10-MSOP 10-TFSOP Exposed Pad | -40 °C | 125 ¯C | 10-MSOP-EP | 1 | Buck | 3.3 V | Positive | 195 kHz | 2.15 MHz | 4.2 V | Surface Mount | 1.81 mOhm | 0.118 in 3 Lead | |||
Analog Devices | 750 mA | Step-Down | 42 V | 10-MSOP 10-TFSOP Exposed Pad | -40 °C | 150 °C | 10-MSOP-EP | 1 | Buck | 3.3 V | Positive | 195 kHz | 2.15 MHz | 4.2 V | Surface Mount | 1.81 mOhm | 0.118 in 3 Lead | |||
Analog Devices | 750 mA | Step-Down | 24 V | Adjustable | 42 V | 10-WFDFN Exposed Pad | -40 °C | 125 ¯C | 10-DFN (3x3) | 1 | Buck | 1.21 V | Positive | 195 kHz | 2.15 MHz | 4.2 V | Surface Mount |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tape & Reel (TR) | 2500 | $ 4.55 | |
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