STEF512GR

STEF512GR is an integrated dual electronic fuse designed to protect circuitry on its output from overcurrent and overvoltage events, in those applications requiring hot swap operation and in-rush current control. The device embeds two independent electronic fuses, one for 5V rails and one for 12V rails. Thanks to very low ON-resistance of integrated PowerFETs, voltage drop from main supply to load is very low during normal operations. The start-up time can be adjusted by user for each eFuse, via two small soft-start capacitors, connected to relevant pins. In this manner, the inrush 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. The device also provides a precise overvoltage clamp for each channel, preventing the load from being damaged by power supply failures, and UVLO, assuring that input voltage is above minimum operating threshold, before the power device is turned on.

• 5V and 12V channels into one chip
• 25V absolute maximum input voltage
• Precise output over voltage clamp
• Fixed current limit: 3A on 5V, 4A on 12 V
• Latched-off thermal protection
• Input undervoltage lockout
• Adjustable output voltage slew-rate for each channel
• Integrated 40mohm Power FETs
• SAS disable pin
• TSOT23-8L package and operating junction temperature range from -40 to 125°C