TPS25944LRVCR

The TPS25942 and TPS25944 eFuse power MUX are compact, feature-rich power management devices with a comprehensive suite of protection functions. The wide operating range enables control of many commonly used DC bus voltages. Integrated back-to-back FETs provide bidirectional current control, making these devices ideal for power multiplexing and systems with multiple power supplies. The devices also offer numerous programmable protection features for loads, power supplies, and the devices themselves. To meet specific system requirements, thresholds can be set for undervoltage, overvoltage, overcurrent, dV₀/dt slew rate, power good, and inrush current protection. For system status monitoring and downstream load control, the devices provide PGOOD, FLT, and precision current monitor outputs. The TPS25942 and TPS25944 monitor V₍IN₎ and V₍OUT₎ to provide true reverse output blocking when V₍IN₎ < (V₍OUT₎ - 10mV). The devices can be configured to assign primary/auxiliary power supply priority using the FLT and DMODE pins.

Applications

• Power path management
• Redundant power systems
• PCIe cards, NIC, and RAID systems
• USB power banks, power MUX
• SSD and HDD
• Tablet and laptop power adapter devices
• PLC, solid-state relays, and fan control

Key features

• Operating voltage range: 2.7V to 18V, 20V maximum
• 42mΩ Rₒₙ (typical)
• 0.6A to 5.3A adjustable current limit (±8%)
• IMON current monitor output (±8%), I_Q typical 200μA during operation
• I_Q typical 15μA when disabled
• ±2% overvoltage and undervoltage thresholds
• Reverse current blocking, 1μs reverse voltage turn-off time
• Programmable dV₀/dt control
• Power good and fault outputs
• Two overcurrent fault response options
• TPS25942: I(LIMIT) with thermal shutdown
• TPS25944: 4ms fault timer, then latch off
• Junction temperature range: -40°C to +125°C
• UL 2367 certified – File No. 169910
• Rₗₘ ≥ 20kΩ (maximum current 4.81A)
• Compliant with UL60950 safety standard during single-fault conditions – open/short ILIM detection