Key facts
- Brand
- Linear Technology
- Model
- LTC4365
- Category
- Other Electronics
- Documents
- 3
- Languages
- EN
- Last added
- 2012-06-05
Start here
linear DESIGN FEATURES LTJournal-V21N2-05-df-LTC4365-Victor_Fleury service manual
The document describes design features of the LTC4365, an integrated circuit designed to protect sensitive circuits from unpredictable high or negative supply voltages. It utilizes a unique architecture that requires only a single external dual N-channel MOSFET to block positive and negative voltages at the input pin.
Key capabilities include accurate overvoltage and undervoltage protection with user-selectable thresholds, novel reverse supply protection without needing blocking diodes, and AC line voltage filtering via a recovery delay timer. The device operates within a wide voltage range of 2.5V to 34V.
Linear Technology LTC4365 specifications
| Operating Range | 2.5V to 34V |
|---|---|
| Undervoltage Block Limit | Down to -40V |
| External Component Requirement | Dual N-channel MOSFET |
| Shutdown Current | 10pA |
Source: linear DESIGN FEATURES LTJournal-V21N2-05-df-LTC4365-Victor_Fleury service manual
All Linear Technology LTC4365 documents by type
How to use the product for one specific task, with worked examples.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
How does the LTC4365 protect against reverse supply connections?
It employs a novel circuit that connects the GATE pin to the input voltage when sensing a negative voltage, allowing back-to-back external MOSFETs to block without a diode drop.
From: linear DESIGN FEATURES LTJournal-V21N2-05-df-LTC4365-Victor_Fleury service manual
Can the LTC4365 select between two power supplies?
Yes, with the part in shutdown, the input and output pins can be driven by different supplies; the device drives the gate below the lower supply to prevent current flow.
From: linear DESIGN FEATURES LTJournal-V21N2-05-df-LTC4365-Victor_Fleury service manual
What external components are required for the LTC4365 circuit?
The only external active component required is a dual N-channel MOSFET connected between the unpredictable supply and the sensitive load.
Does the LTC4365 block AC voltages?
Yes, after an OV or UV fault occurs, the input supply must return to the valid window for at least 36ms, which effectively blocks 50Hz and 60Hz unrectified AC.
What is the main feature of the LT4363?
It extends overvoltage protection capabilities beyond 100V without sacrificing overcurrent protection.
What is the function of the LTC4366?
It is a floating surge stopper that clamps the output to a user-defined voltage during high voltage transient events.