| Allicdata Part #: | LTC4281CUFD#PBF-ND |
| Manufacturer Part#: |
LTC4281CUFD#PBF |
| Price: | $ 8.04 |
| Product Category: | Integrated Circuits (ICs) |
| Manufacturer: | Linear Technology/Analog Devices |
| Short Description: | IC HOT SWAP CTRLR WITH I2C 28QFN |
| More Detail: | Hot Swap Controller 1 Channel General Purpose 28-Q... |
| DataSheet: |  LTC4281CUFD#PBF Datasheet/PDF |
| Quantity: | 1000 |
| Moisture Sensitivity Level (MSL): | 1 (Unlimited) |
| Lead Free Status / RoHS Status: | Lead free / RoHS Compliant |
| 1 +: | $ 7.31430 |
| 25 +: | $ 4.89031 |
| 100 +: | $ 4.15762 |
Specifications
| Programmable Features: | Current Limit |
| Base Part Number: | LTC4281 |
| Feature Pins: | -- |
| Supplier Device Package: | 28-QFN (4x5) |
| Package / Case: | 28-WFQFN Exposed Pad |
| Mounting Type: | Surface Mount |
| Current - Supply: | 3.5mA |
| Operating Temperature: | 0°C ~ 70°C |
| Current - Output (Max): | -- |
| Voltage - Supply: | 2.9 V ~ 33 V |
| Series: | -- |
| Features: | OVP, UVLO |
| Applications: | General Purpose |
| Internal Switch(s): | No |
| Number of Channels: | 1 |
| Type: | Hot Swap Controller |
| Moisture Sensitivity Level (MSL): | -- |
| Part Status: | Active |
| Lead Free Status / RoHS Status: | -- |
| Packaging: | Tube |
Description
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PMIC, or power management IC, is an important device used to control the power system in modern electronic systems. Hot Swap Controllers are one type of PMICs, used to control the power delivery of an electronic device without turning it off. The LTC4281CUFD#PBF is one such hot swap controller, used to control power delivery and protect against over-current conditions. In this article, we will discuss the LTC4281CUFD#PBF’s application field and working principle.
The primary application field for the LTC4281CUFD#PBF is the controlled insertion of hot pluggable load devices. It is primarily used in applications where the device under control requires power and a clean ground connection prior to turning it on. Examples include PCIe cards, SATA hard drives, and other hot pluggable devices. The LTC4281CUFD#PBF is also suitable for use in most applications involving adjustable output voltage regulator controllers.
The LTC4281CUFD#PBF contains an integrated hot swap controller, as well as a high current FET gate driver and a set of voltage regulators. In terms of design, the LTC4281CUFD#PBF includes two internal power supply regulators. The first is a regulator for the FET gate driver, which provides the isolation needed to ensure proper device operation. The second is a voltage regulator for the internal circuits, which regulates the voltage supplied to the internal hot swap controller.
The LTC4281CUFD#PBF also contains a number of additional features. These include an analog switch to enable power control and protection from overcurrent conditions, a presettable fault timer, an undervoltage lockout, overvoltage protection, and an output voltage clamp. Additionally, the device offers a high common-mode noise immunity, which is crucial in applications requiring a clean output voltage.
The working principle of the LTC4281CUFD#PBF is fairly straightforward. The device contains a voltage-controlled FET gate driver, which is connected to the supply rail. When the input voltage rises above a certain level, the FET gate driver triggers the internal hot swap controller to turn on. The controller then cycles the power rails to ensure that all hotswappable devices are powered up in the correct sequence, thus ensuring a safe and fault-tolerant power delivery. At the same time, the device’s other features help to protect against over-current conditions, under-voltage conditions, and over-voltage conditions.
In conclusion, the LTC4281CUFD#PBF is an important device for controlling power delivery in hotswappable devices. Its application field includes adjustable output voltage regulator controllers, and its working principle involves a voltage-controlled FET gate driver and a set of internal power supply regulators. The device’s features also help to protect against over-current and over-voltage conditions.
The specific data is subject to PDF, and the above content is for reference
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