LT3845MPFE#PBF
ActiveHIGH VOLTAGE SYNCHRONOUS CURRENT MODE STEP-DOWN CONTROLLER WITH ADJUSTABLE OPERATING FREQUENCY
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LT3845MPFE#PBF
ActiveHIGH VOLTAGE SYNCHRONOUS CURRENT MODE STEP-DOWN CONTROLLER WITH ADJUSTABLE OPERATING FREQUENCY
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Technical Specifications
Parameters and characteristics for this part
| Specification | LT3845MPFE#PBF |
|---|---|
| Clock Sync | True |
| Control Features | Frequency Control, Enable, Soft Start |
| Frequency - Switching | 300 kHz |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -55 °C |
| Output Configuration | Positive |
| Output Phases | 1 |
| Output Type | Transistor Driver |
| Package / Case | Exposed Pad, 16-TSSOP |
| Package / Case [custom] | 0.173 " |
| Package / Case [custom] | 4.4 mm |
| Supplier Device Package | 16-TSSOP-EP |
| Synchronous Rectifier | True |
| Topology | Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 60 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 4 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tube | 1 | $ 27.70 | |
| 10 | $ 20.57 | |||
| 25 | $ 18.74 | |||
| 100 | $ 16.70 | |||
| 250 | $ 15.75 | |||
Description
General part information
LT3845A Series
The LT3845A is a high voltage, synchronous, current mode controller used for medium to high power, high efficiency supplies. It offers a wide 4V to 60V input range (7.5V minimum start-up voltage). An onboard regulator simplifies the biasing requirements by providing IC power directly from VIN.Burst Mode®operation maintains high efficiency at light loads by reducing IC quiescent current to 120μA. Light load efficiency is also improved with the reverse inductor current inhibit function which supports discontinuous operation.Additional features include adjustable fixed operating frequency that can be synchronized to an external clock for noise sensitive applications, gate drivers capable of driving large N-channel MOSFETs, a precision undervoltage lockout, 10μA shutdown current, short-circuit protection and a programmable soft-start.The LT3845A is available in a 16-lead thermally enhanced TSSOP package.FeaturesLT3845-LT3845AImproved Performance In Over Current ConditionsApplications12V and 42V Automotive and Heavy Equipment48V Telecom Power SuppliesAvionics and Industrial Control SystemsDistributed Power Converters
Documents
Technical documentation and resources