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.