STMicroelectronics STEF512SRDB
The STEF512SRDB is an integrated dual electronic fuse, designed to protect circuitry on the output from overcurrent and overvoltage events, in those applications requiring hot-swap operation and in-rush current control. The device embeds two electronic fuses, one for the 5 V rail and one for the 12 V rail. The 5 V channel provides a reverse blocking feature, preventing current flow to the input in case of brownout or shutdown.| Part No. | STEF512SRDB |
|---|---|
| Datasheet | STEF512SRDB Download |
| Manufacturer |  STMicroelectronics |
| Description | Dual eFuse |
| Buy | Stock & Price |
FEATURES
● 5 V and 12 V channels into one chip● 25 V absolute maximum input voltage
● Precise output overvoltage clamp
● Fixed overcurrent protection trip points
● Fast reverse current protection on 5 V channel
● Thermal protection
● Latch-off thermal protection
● Input undervoltage lockout
● Adjustable output voltage slew rate for each channel by external capacitors
● Integrated 40 mΩ power MOSFETs
● 100 ms safety start-up delay
● SAS disable and enable pins
● 5 V embedded LDO
● - 3 V transient protection
● DFN10 (2 x 3 mm) package
APPLICATIONS
● HDD and SSD● Hard disk array and NAS
● Hot-swap, hot-plug protection
DESCRIPTION
Thanks to the very low ON-resistance of the integrated power MOSFETs, the voltage drop from the main supply to the load is very low during normal operation. The start-up time of each eFuse can be adjusted by the user, via two small soft-start capacitors, connected to the relevant pins. In this way the in-rush current at startup can be kept under control. The maximum load current is precisely limited, by utilizing a sense FET topology, to factory-defined values.
