LTC3875IUH#PBF
ActiveDUAL, 2-PHASE, SYNCHRONOUS CONTROLLER WITH LOW VALUE DCR SENSING AND TEMPERATURE COMPENSATION
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LTC3875IUH#PBF
ActiveDUAL, 2-PHASE, SYNCHRONOUS CONTROLLER WITH LOW VALUE DCR SENSING AND TEMPERATURE COMPENSATION
Technical Specifications
Parameters and characteristics for this part
| Specification | LTC3875IUH#PBF |
|---|---|
| Clock Sync | False |
| Control Features | Tracking, Soft Start, Current Limit, Enable, Phase Control, Power Good, Frequency Control |
| Frequency - Switching [Max] | 720 kHz |
| Frequency - Switching [Min] | 250 kHz |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 2 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Phases | 2 |
| Output Type | Transistor Driver |
| Package / Case | 40-WFQFN Exposed Pad |
| Supplier Device Package | 40-QFN (5x5) |
| Synchronous Rectifier | True |
| Topology | Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 38 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 4.5 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Bulk | 51 | $ 5.97 | |
| 51 | $ 5.97 | |||
| Tube | 1 | $ 12.02 | ||
| 1 | $ 12.02 | |||
| 10 | $ 8.45 | |||
| 10 | $ 8.45 | |||
| 25 | $ 7.54 | |||
| 25 | $ 7.54 | |||
Description
General part information
LTC3875 Series
The LTC3875 is a dual output current mode synchronous step-down DC/DC controller that drives all N-channel power MOSFET stages. It employs a unique architecture that enhances the signal-to-noise ratio of the current sense signal, allowing the use of very low DC resistance (DCR) power inductors to maximize efficiency in high current applications. This feature also reduces the switching jitter commonly found in low DCR applications with current mode control.The LTC3875 features two high speed differential amplifiers which can be used to compensate for the voltage drop from the LTC3875 to the load. Its DCR temperature compensated adjustable over current trip points from 10mV to 30mV limits the maximum output current precisely over temperature.A unique thermal balancing function adjusts per phase current to minimize the thermal stress for multichip single output applications. The LTC3875 is available in the 40- lead 6mm × 6mm (0.5mm pitch) and 40-lead 5mm × 5mm (0.4mm pitch) QFN packages.APPLICATIONSServers and InstrumentsTelecom SystemsDC Power Distribution Systems