RS31211
Simple 3.3V 4A eFuse Protection Switches
Features
- RS31211 – 3.3V eFuse
- RS31212 – 5V eFuse
- RS31309 – 2.97V to 18V input
- RS31311 – 12V eFuse
- Integrated 34mΩ Pass MOSFET
- Adjustable 0.5A to 4A current limit
- Adjustable output slew rate
- Enable with adjustable input UVLO threshold
- Fixed over-voltage camp: 3.8V for RS31211, 5.7V for RS31212 and 13.7V for RS31311
- Built-on over temperature protection
- Small 2x2mm WSON package
- RoHS compliant and Green
Description
The RS31211/212/309/311 devices are active circuit protection devices with an integrated MOSFET used to limit current and voltage to safe levels during fault conditions.
The current limit level can be set with a resistor between ILM and ground, and the typical current limit accuracy is ±7.5%.
The device has over voltage protection feature which limits the output voltage to a fixed level when over voltage fault occurs.
To limit the inrush current during device turn-on, the rising slew rate of output voltage can be set by a capacitor between dVdt and ground.
The device also offers EN on/off control and input UVLO features.
The device is available in WSON 8 pins, 2×2 mm package.
Applications
- Hot-swap, hot-plug
- PCI and PCIe cards
- Adapter powered devices
- HDD and SSD drivers
Ordering Information
| Part Number | Notes | Status | RoHS | Package | Buy / Sample |
| RS31211AR | Latch | Active | Yes | 2 x 2mm, WSON-8 | Buy on DigiKey |
| RS31211BR | Auto Retry | Active | Yes | 2 x 2mm, WSON-8 | Buy on DigiKey |
| RS31211DR | Auto Retry, Quick Output Discharge | Active | Yes | 2 x 2mm, WSON-8 | Buy on DigiKey |
