LTC7851EUHH#PBF
ActiveQUAD OUTPUT, MULTIPHASE STEP-DOWN VOLTAGE MODE DC/DC CONTROLLER WITH ACCURATE CURRENT SHARING
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LTC7851EUHH#PBF
ActiveQUAD OUTPUT, MULTIPHASE STEP-DOWN VOLTAGE MODE DC/DC CONTROLLER WITH ACCURATE CURRENT SHARING
Technical Specifications
Parameters and characteristics for this part
| Specification | LTC7851EUHH#PBF |
|---|---|
| Clock Sync | False |
| Control Features | Power Good, Soft Start, Tracking, Frequency Control, Enable, Current Limit |
| Duty Cycle (Max) [Max] | 91.5 % |
| Frequency - Switching [Max] | 3 MHz |
| Frequency - Switching [Min] | 250 kHz |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 4 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Phases | 1 |
| Output Type | PWM Signal |
| Package / Case | 58-WFQFN Exposed Pad |
| Supplier Device Package | 58-QFN (5x9) |
| Synchronous Rectifier | False |
| Topology | Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 5.5 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 3 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 | $ 12.57 | |
| 10 | $ 8.87 | |||
| 25 | $ 7.91 | |||
| 100 | $ 6.85 | |||
| 250 | $ 6.33 | |||
| 500 | $ 6.01 | |||
| 1000 | $ 5.79 | |||
Description
General part information
LTC7851 Series
The LTC7851/LTC7851-1 are quad output multiphase synchronous step-down switching regulator controllers that employ a constant frequency voltage mode architecture. They maintain excellent current balance between channels when paralleled with their internal current sharing loop. Lossless DCR or a low value RSENSEis used for output current sensing. Multiple LTC7851/LTC7851-1 devices can be used for high phase count operation.A very low offset, high bandwidth error amplifier, combined with remote output voltage sensing, provides excellent transient response and output regulation. The LTC7851/ LTC7851-1 operates with a VCCsupply voltage from 3V to 5.5V and is designed for step-down conversion with VINfrom 3V to 27V and produces an output voltage from 0.6V to VCC– 0.5V.The LTC7851-1 is identical to the LTC7851 except it has a lower current sense amplifier gain, making it ideal for DrMOS devices with internal current sense.ApplicationsHigh Current Distributed Power SystemsDSP, FPGA and ASIC SuppliesDatacom, Telecom and Computing Systems
Documents
Technical documentation and resources