TPS25982 15A, 2.7mΩ smart eFuse with accurate load current monitor and adjustable transient fault management |

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15A, 2.7mΩ smart eFuse with accurate load current monitor and adjustable transient fault management



The TPS25982 family of eFuses is a highly integrated circuit protection and power management solution in a small package. The devices are operational over a wide input voltage range. A single part caters to low-voltage systems needing minimal I*R voltage drop as well as higher voltage, high current systems needing low power dissipation. They are a robust defense against overloads, short-circuits, voltage surges and excessive inrush current.

Overvoltage events are limited by internal cutoff circuits, with multiple device options to choose the overvoltage threshold.

Multiple device options exist to choose between the response to overcurrent conditions, circuit breaker or active current limiter. The overcurrent limit and fast-trip (short-circuit) threshold can be set with a single external resistor. The devices intelligently manage the overcurrent response by distinguishing between transient events and actual faults, thereby allowing the system to function uninterrupted during line and load transients without compromising on the robustness of the protection against faults. The device can be configured to stay latched off or retry automatically after a fault shutdown. The number of auto-retries as well as the retry delay are configurable with capacitors. This enables remote systems to automatically recover from temporary faults while ensuring that power supplies are not stressed indefinitely due to a persistent fault.

The TPS25982 devices are available in a small 4 mm × 4 mm QFN package. The devices are characterized for operation over a junction temperature range of –40˚C to 125˚C.


  • Wide input voltage range: 2.7 V to 24 V
    • 30-V Absolute maximum
  • Low On-Resistance: RON = 2.7-mΩ typical
  • Adjustable current limit threshold
    • Range: 2 A to 15 A
    • Accuracy: ± 8% (typical for ILIM > 5 A)
  • Circuit breaker and current limiter options
  • Adjustable overcurrent blanking timer
    • Handles load transients without tripping
  • Accurate current monitor output
    • ± 1.5% (typical at 25 °C for IOUT > 3 A)
  • User configurable fault response
    • Latch-off or auto-retry
    • Number of retries (Finite or indefinite)
    • Delay between retries
  • Robust short-circuit protection
    • Fast-trip response time < 400-ns typical
    • Tested against 1 million power-into-short events
    • Immune to line transients - no nuisance tripping
  • Adjustable output slew rate (dVdt) control
  • Adjustable undervoltage lockout
  • Overvoltage lockout (Fixed 3.7-V, 7.6-V, 16.9-V and no-OVLO options)
  • Integrated overtemperature protection
  • Power good indication
  • Adjustable load detect and handshake timer
  • UL 2367 Recognition
    • File no. E339631
    • RILIM ≥ 182 Ω
  • IEC 62368 CB Certification
  • Small footprint: 4-mm × 4-mm QFN package

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Part number Order FET Vin (Min) (V) Vin (Max) (V) Vabsmax_cont (V) Current limit (Min) (A) Current limit (Max) (A) Overcurrent response Current limit type UL recognition Fault response Current limit function enabled Ron (Typ) (mOhm) Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
TPS25982 Order now Internal     2.7     24     30     2     15     Current Limiting or Circuit Breaker     Adjustable     UL 2367 (Pending)     Auto Retry
Latch Off    
Always     2.7     Catalog     -40 to 125     VQFN | 24     24VQFN: 16 mm2: 4 x 4 (VQFN | 24)    
TPS2595 Order now Internal     2.7
18     20     0.5     4     Current Limiting     Adjustable     Yes
Auto Retry
Latch Off    
Always     34     Catalog     -40 to 125     WSON | 8     8WSON: 4 mm2: 2 x 2 (WSON | 8)