1FEATURES
2• Integrated 30-mΩ Pass MOSFET
• Up to 20-V Bus Operation
• Programmable Fault Current
• Programmable Hard Current-Limit
• Programmable Fault Timer
• Internal MOSFET Power Limiting Foldback
• Latching and Auto-Retry Operation
• Analog Current Monitor Output
• Powergood Output
• Fault Output Indicator
• 4 mm × 4 mm QFN
• –40°C to 125°C Junction Temperature Range
• UL2367 Recognized - File Number E169910

APPLICATIONS
• RAID Arrays
• Telecommunications
• Plug-In Circuit Boards
• Disk Drives
• SSDs
• PCIE
• Fan Control

DESCRIPTION
The TPS2420 device provides highly integrated load
protection for applications up to 20-V. The maximum UV turn-on threshold of 2.9 V makes the TPS2420
well suited to standard bus voltages as low as 3.3 V.
The TPS2420 device protects loads, minimizes inrush
current, and safely shuts down in the event of a fault. The programmable fault current threshold starts the
fault timer while allowing the current to pass to the
load uninhibited. The programmable current limit
threshold sets the maximum current allowed into the load, for both inrush and severe load faults. Both
events use the programmable timer which inhibits all
current to the load when it expires.
The dual protection thresholds are useful in
applications such as disk drives. The start-up and
seek currents are typically higher than the nominal current and during this time the load needs a low
impedance path to deliver the power. If a failure at the load occurs, the current limit does not allow the
current to exceed the programmed threshold. This
protects both the load and the integrity of the power supply. The internal MOSFET is protected by power
limit circuitry which ensures that the MOSFET
remains within its safe operating area (SOA) during
all operating states.
The TPS2420 device also allows the system to
monitor load currents with no need for a shunt in the power path. The gain of the current monitor can be
scaled to the application. Fault and power good
outputs are provided for improved system
management and sequencing control.
This device can be programmed to either latch-off or
retry in the event of a fault. All of this functionality is
packed into a 16-pin 4 × 4 mm QFN package.