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TPS2421-1

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3-V to 20-V, 33mΩ, 1.8-5.5A eFuse

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Data sheet

TPS2421-1

ACTIVE
Data sheet Order now

Product details

FET Internal Ron (typ) (mΩ) 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 Power limiting, current limiting Fault response Latch-off Soft start Adjustable Features Fault output, Power good signal UL recognition UL2367 Rating Catalog Device type eFuses and hot swap controllers Operating temperature range (°C) -40 to 125 Function Adjustable current limit, Current monitoring, Power good signal, Short circuit protection, Thermal shutdown
FET Internal Ron (typ) (mΩ) 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 Power limiting, current limiting Fault response Latch-off Soft start Adjustable Features Fault output, Power good signal UL recognition UL2367 Rating Catalog Device type eFuses and hot swap controllers Operating temperature range (°C) -40 to 125 Function Adjustable current limit, Current monitoring, Power good signal, Short circuit protection, Thermal shutdown
HSOIC (DDA) 8 29.4 mm² 4.9 x 6
  • 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
  • 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

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).

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).
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Technical documentation

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Type Title Date
* Data sheet TPS2421-x 5-A, 20-V Integrated FET Hot Swap datasheet (Rev. K) PDF | HTML 15 May 2019
Certificate TPS2421-1 UL Certificate of Compliance IEC 60950-1 24 Apr 2020
Functional safety information eFuse: Safety Certification and why it Matters 18 Mar 2020
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note Basics of eFuses (Rev. A) 05 Apr 2018
User guide TPS2420 Reference Design 27 Mar 2009
User guide Using the TPS2420, TPS2421-1, TPS2421-2 06 Jan 2009

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Evaluation board

TPS2421-1EVM-02 — TPS2421-1 Hot Swap Controller Evaluation Module

The TPS2421-1EVM-02 is a 3-V to 18-V module using the TPS2421-1 hot swap controller with integrated MOSFET. At power on, the output is power limited to control inrush current and protect the MOSFET. On an over-current condition, the controller interrupts power to the load at high speed and signals (...)

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TPS2421-1 — 3-V to 20-V, 33mΩ, 1.8-5.5A eFuse TPS2421-2 — 3-V to 20-V, 33mΩ, 1.8-5.5A eFuse with thermal shutdown
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