LT3971EDD#PBF
Active38V, 1.2A, 2MHZ STEP-DOWN REGULATOR WITH 2.8ΜA QUIESCENT CURRENT
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LT3971EDD#PBF
Active38V, 1.2A, 2MHZ STEP-DOWN REGULATOR WITH 2.8ΜA QUIESCENT CURRENT
Deep-Dive with AI
Technical Specifications
Parameters and characteristics for this part
| Specification | LT3971EDD#PBF |
|---|---|
| Current - Output | 1.2 A |
| Frequency - Switching [Max] | 2 MHz |
| Frequency - Switching [Min] | 200 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] | 38 V |
| Voltage - Input (Min) [Min] | 4.3 V |
| Voltage - Output (Max) [Max] | 30 V |
| Voltage - Output (Min/Fixed) [Min] | 1.19 V |
LT3971 Series
38V, 1.2A, 2MHz Step-Down Regulator with 2.8μA Quiescent Current
| Part | Package / Case | Operating Temperature [Min] | Operating Temperature [Max] | Voltage - Input (Min) [Min] | Number of Outputs | Frequency - Switching [Min] | Frequency - Switching [Max] | Function | Mounting Type | Voltage - Input (Max) [Max] | Voltage - Output (Min/Fixed) | Current - Output | Topology | Output Configuration | Supplier Device Package | Synchronous Rectifier | Voltage - Output (Min/Fixed) [Min] | Output Type | Voltage - Output (Max) [Max] | Package / Case |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Analog Devices Inc./Maxim Integrated | 10-WFDFN Exposed Pad | -40 C | 125 °C | 4.3 V | 1 | 200 kHz | 2 MHz | Step-Down | Surface Mount | 38 V | 3.3 V | 1.2 A | Buck | Positive | 10-DFN (3x3) | |||||
 Analog Devices Inc./Maxim Integrated | 10-MSOP 10-TFSOP Exposed Pad | -40 C | 125 °C | 4.3 V | 1 | 200 kHz | 2 MHz | Step-Down | Surface Mount | 38 V | 1.2 A | Buck | Positive | 10-MSOP-EP | 1.19 V | Adjustable | 30 V | |||
Analog Devices Inc./Maxim Integrated | 10-MSOP 10-TFSOP Exposed Pad | -40 C | 125 °C | 4.3 V | 1 | 200 kHz | 2 MHz | Step-Down | Surface Mount | 38 V | 3.3 V | 1.2 A | Buck | Positive | 10-MSOP-EP | |||||
Analog Devices Inc./Maxim Integrated | 10-WFDFN Exposed Pad | -40 C | 125 °C | 4.3 V | 1 | 200 kHz | 2 MHz | Step-Down | Surface Mount | 38 V | 1.2 A | Buck | Positive | 10-DFN (3x3) | 1.19 V | Adjustable | 30 V | |||
 Analog Devices Inc./Maxim Integrated | 16-TFSOP Exposed Pad | -40 C | 125 °C | 4.3 V | 1 | 200 kHz | 2 MHz | Step-Down | Surface Mount | 38 V | 1.2 A | Buck | Positive | 16-MSOP-EP | 1.19 V | Adjustable | 30 V | 0.118 in 3 mm | ||
Analog Devices Inc./Maxim Integrated | 10-MSOP 10-TFSOP Exposed Pad | -40 C | 125 °C | 4.3 V | 1 | 200 kHz | 2 MHz | Step-Down | Surface Mount | 38 V | 5 V | 1.2 A | Buck | Positive | 10-MSOP-EP | |||||
Analog Devices Inc./Maxim Integrated | 10-MSOP 10-TFSOP Exposed Pad | -40 C | 125 °C | 4.3 V | 1 | 200 kHz | 2 MHz | Step-Down | Surface Mount | 38 V | 5 V | 1.2 A | Buck | Positive | 10-MSOP-EP | |||||
 Analog Devices Inc./Maxim Integrated | 16-TFSOP Exposed Pad | -40 C | 125 °C | 4.3 V | 1 | 200 kHz | 2 MHz | Step-Down | Surface Mount | 38 V | 1.2 A | Buck | Positive | 16-MSOP-EP | 1.19 V | Adjustable | 30 V | 0.118 in 3 mm | ||
Analog Devices Inc./Maxim Integrated | 10-MSOP 10-TFSOP Exposed Pad | -40 C | 125 °C | 4.3 V | 1 | 200 kHz | 2 MHz | Step-Down | Surface Mount | 38 V | 5 V | 1.2 A | Buck | Positive | 10-MSOP-EP | |||||
 Analog Devices Inc./Maxim Integrated | 10-MSOP 10-TFSOP Exposed Pad | -40 C | 125 °C | 4.3 V | 1 | 200 kHz | 2 MHz | Step-Down | Surface Mount | 38 V | 1.2 A | Buck | Positive | 10-MSOP-EP | 1.19 V | Adjustable | 30 V |
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 | 1009 | $ 7.88 | 1m+ |
| Tube | 1 | $ 6.82 | 1m+ | |
| 10 | $ 4.73 | |||
| 25 | $ 4.19 | |||
| 100 | $ 4.14 | |||
Description
General part information
LT3971 Series
The LT3971 is an adjustable frequency monolithic buck switching regulator that accepts a wide input voltage range up to 38V. Low quiescent current design consumes only 2.8μA of supply current while regulating with no load. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping the output ripple below 15mV in a typical application. An internally compensated current mode topology is used for fast transient response and good loop stability. A high efficiency 0.33Ω switch is included on the die along with a boost Schottky diode and the necessary oscillator, control and logic circuitry. An accurate 1V threshold enable pin can be used to shut down the LT3971, reducing the input supply current to 700nA. A capacitor on the SS pin provides a controlled inrush current (soft-start). A power good flag signals when VOUTreaches 91% of the programmed output voltage. The LT3971 is available in small 10-lead MSOP and 3mm × 3mm DFN packages with exposed pads for low thermal resistance. A 16-lead MSOP is also offered which has enhanced pin-to-pin fault tolerance.VoutIoutVref AccuracyLT3971Adj1.2A2.5%LT3971-3.33.3V1.2A2.5%LT3971-55V1.2A2.5%LT3971AAdj1.3A1.5%LT3971A-55V1.3A1.5%ApplicationsAutomotive Battery RegulationPower for Portable ProductsIndustrial Supplies
Documents
Technical documentation and resources