Key facts
- Brand
- Linear Technology
- Model
- LTC3855
- Category
- Other Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2012-06-05
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Linear Technology LTC3855 DC/DC Controller Datasheet
The LTC3855 is a versatile 2-phase synchronous buck controller IC designed for high current applications where cycle-by-cycle current is measured across the inductor (DCR sensing). It features on-chip drivers, remote output voltage sensing, and an inductor temperature sensing scheme to compensate for resistance changes as the component heats up. The device supports inputs up to 38V and outputs up to 12.5V.
Read onlineLinear Technology LTC3855 specifications
| Input Voltage Range | up to 38V |
|---|---|
| Output Voltage Range | 0.6V to 12.5V |
| Switching Frequency Range | 250kHz to 770kHz |
| Minimum On-Time | 100ns |
| Full Load Efficiency | 86.7% |
| Peak Efficiency | 89.4% |
Source: Linear Technology LTC3855 DC/DC Controller Datasheet
All Linear Technology LTC3855 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What sensing method does the LTC3855 use?
It uses DCR (DC Resistance) sensing across the inductor to measure cycle-by-cycle current.
What is the maximum input voltage for the LTC3855?
The controller is suitable for inputs up to 38V.
What is the output voltage range of the LTC3855?
The output voltage ranges from 0.6V to 12.5V without the differential amplifier, and from 0.6V to 3.3V with it.
From: Linear Technology LTC3855 Dual Output Step-Down Controller Design Note 478
Does the LTC3855 support DCR sensing?
Yes, it can sense inductor current using either a sense resistor or inductor DCR sensing.
From: Linear Technology LTC3855 Dual Output Step-Down Controller Design Note 478