The TPS2421 device provides highly integrated hot swap power management and superior protection in applications where the load is powered by busses up to 20 V. The TPS2421 device is well suited to standard bus voltages as low as 3.3 V because of the maximum-UV turnon threshold of 2.9 V. These devices are very effective in systems where a voltage bus must be protected to prevent shorts from interrupting or damaging the unit. The TPS2421 device is an easy to use devices in an 8-pin PowerPad™ SO-8 package.

The TPS2421 device has multiple programmable protection features. Load protection is accomplished by a non-current limiting fault threshold, a hard current limit, and a fault timer. The current dual thresholds allow the system to draw short high current pulses, while the fault timer is running, without causing a voltage droop at the load. An example of this is a disk drive startup. This technique is ideal for loads that experience brief high demand, but benefit from protection levels in-line with their average current draw.

Hotswap MOSFET protection is provided by power limit circuitry which protects the internal MOSFET against SOA related failures.

The TPS2421 device is available in latch-off on fault (TPS2421-1) and retry on fault (TPS2421-2).

• Integrated Pass MOSFET
• Up to 20-V Bus Operation
• Programmable Fault Current
• Current Limit Proportionally Larger than Fault Current
• Programmable Fault Timer
• Internal MOSFET Power Limiting
• Latch-Off on Fault (TPS2421-1) and Retry (TPS2421-2) Versions
• SO-8 PowerPad? Package
• –40°C to +125°C Junction Temperature Range
• UL2367 Recognized - File Number E169910

• FET
• Internal
• Ron (Typ) (mOhm)
• 33
• Vin (Min) (V)
• 3
• Vin (Max) (V)
• 20
• Vabsmax_cont (V)
• 25
• Current limit (Min) (A)
• 1.8
• Current limit (Max) (A)
• 5.5
• Overcurrent response
• Circuit breaker, Current limiting
• Fault response
• Latch-off
• UL recognition
• UL2367

TPS2421-1的完整型号有：TPS2421-1DDA、TPS2421-1DDAR，以下是这些产品的关键参数及官网采购报价：

TPS2421-1DDA，工作温度：-40 to 125，封装：SO PowerPAD (DDA)-8，包装数量MPQ：75个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAUAG，TI官网TPS2421-1DDA的批量USD价格：1.32（1000+）

TPS2421-1DDAR，工作温度：-40 to 125，封装：SO PowerPAD (DDA)-8，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAUAG，TI官网TPS2421-1DDAR的批量USD价格：1.1（1000+）

TPS2421-1EVM-02 — TPS2421-1 热插拔控制器评估模块

TPS2421-1EVM-02 是使用带有集成式 MOSFET 的 TPS2421-1 热插拔控制器的 3V 至 18V 模块。接通电源时，输出功率受限，从而控制浪涌电流并保护 MOSFET。在发生过流的情况下，控制器将快速中断负载的供电，继而发出表明负载状态的信号。工作电流、故障电流和故障计时器设置均可通过硬件编程实现。

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