TPS26636PWPR - 60V, 6A eFuse with Power Limit & Surge Protection
MPN: TPS26636PWPR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.96 | $3.96 |
| 10 | $3.56 | $35.60 |
| 100 | $3.17 | $317.00 |
| 500 | $2.85 | $1,425.00 |
| 1,000 | $2.54 | $2,540.00 |
TPS26636PWPR Overview
An eFuse (electronic fuse) is a solid-state circuit-protection IC that replaces traditional PTC fuses, polyfuses, or mechanical circuit breakers with an integrated MOSFET and analog control loop. It monitors input voltage, load current, and junction temperature, and reacts within microseconds to overcurrent, short-circuit, overvoltage, and thermal events. Within the power-management IC hierarchy, eFuses sit between ideal-diode/ORing controllers and hot-swap controllers, providing fast, resettable protection for downstream DC rails. The TPS26636 is specifically classified as a power-limiting eFuse, meaning it can clamp sustained output power rather than just current.
Key specifications include 4.5 V to 60 V operating input range, 0.6 A to 6 A adjustable current limit (set by ILIM pin resistor), 31-mΩ typical on-resistance, integrated surge protection, programmable inrush slew rate via dVdT pin, load current analog output (IMON), fault output (FLTb), and reverse-current blocking when reverse-current protection is required. The -40 °C to +125 °C junction temperature range and 20-HTSSOP PowerPAD package with low θJA support demanding industrial and telecom environments.
Architecturally, the TPS26636 uses a charge-pump-driven N-channel MOSFET, a precision current-sense amplifier, an internal bandgap reference, and a configurable power-limit engine. Power limiting is computed as an analog multiplier of VIN × IOUT, allowing the device to fold back current at high line voltage, protecting upstream wiring from over-dissipation. The integrated TVS-style surge clamp and reverse-blocking comparator remove external TVS/MOSFET pairs from the BOM, which is a significant board-area and reliability win.
Typical applications include 24-V industrial PLC I/O, factory-automation sensor backplanes, 48-V telecom rectifier secondary protection, motor-drive auxiliary rails, e-mobility accessory power, and any 24-V/48-V distributed-bus system where sustained fault energy must be bounded. The TPS26636 is also widely used as a USB-PD sink protection element at the 20-V/5-A tier.
When laying out the PCB, place input/output ceramic capacitors within 5 mm of their respective pins and stitch the thermal pad to a copper pour of at least 1 sq. inch on each layer, plus thermal vias in a 1.2-mm grid, to keep the 31-mΩ FET below thermal shutdown at maximum dissipation. The IMON output can drive an ADC directly for telemetry - this is rare in discrete-fuse replacements.
This page synthesizes distributor pricing, drop-in alternatives, and practical layout notes that go beyond the manufacturer datasheet to help procurement and design engineers evaluate the TPS26636PWPR for industrial protection designs.
Drop-in alternatives for TPS26636PWPR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TPS26636PWPR (same form factor and footprint) — differing in Absolute Maximum Input Voltage, Mounting Type, Output Power Limiting, Package, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS26633PWPR
✅ Drop-In✓ In Stock
$2.4 / Unit
View Datasheet →TPS26635PWPR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS26630PWPR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS26631PWPR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.72 / Unit
View Datasheet →TPS2663xPWP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS26636PWPR Specifications
| Product Type | eFuse / Hot-Swap Controller (Integrated Power Limiting) |
| Manufacturer | Texas Instruments |
| Operating Input Voltage Range | 4.5 V to 60 V |
| Absolute Maximum Input Voltage | 67 V (per datasheet transient rating - verify in datasheet) |
| On-Resistance (RDSon, typical) | 31 mΩ (integrated N-channel FET) |
| Adjustable Current Limit Range | 0.6 A to 6 A |
| Current Limit Accuracy | ±10% (per datasheet - verify on full datasheet) |
| Output Power Limiting | Yes (programmable via PL pin) |
| Surge Protection | Integrated (output voltage clamp) |
| Reverse Current Blocking | Configurable (per datasheet variant feature) |
| Programmable Inrush Slew Rate (dVdT) | Yes (external capacitor on dVdT pin) |
| Fault Output (FLTb) | Yes (active-low, open-drain) |
| Current Monitor Output (IMON) | Yes (analog voltage proportional to load current) |
| Enable Input (EN/UVLO) | Yes (programmable UVLO threshold) |
| Thermal Shutdown | Yes (auto-retry, per datasheet) |
| Operating Junction Temperature | -40 °C to +125 °C |
| Package | HTSSOP-20 (PWP) with exposed thermal pad |
| Mounting Type | Surface Mount (Tape & Reel) |
| MSL Level | 2 (1-year floor life, per package standard) |
| RoHS Status | Compliant (Pb-free) |
TPS26636PWPR Pin Configuration
| Pin 1 | GND — Ground return and reference for IMON, FLTb, and analog signals |
| Pin 2 | IMON — Analog current-monitor output - voltage proportional to load current |
| Pin 3 | dVdT — Programmable inrush slew-rate control (capacitor to GND) |
| Pin 4 | EN/UVLO — Enable and programmable undervoltage lockout (resistor divider) |
| Pin 5 | FLTb — Fault indicator output, active-low, open-drain |
| Pin 6 | PL — Programmable power-limit threshold (resistor divider) |
| Pin 7 | ILIM — Current-limit set resistor (to GND) |
| Pin 8 | OUT — Power output (load side) - protected rail |
| Pin 9 | OUT — Power output (load side) - second bond pad |
| Pin 10 | IN — Power input (source side) |
| Pin 11 | IN — Power input (source side) - second bond pad |
| Pin 12 | PGND — Power ground for internal FET and charge pump |
| Pin 13 | PGND — Power ground |
| Pin 14 | PGND — Power ground |
| Pin 15 | NC — Not connected (per datasheet) |
| Pin 16 | NC — Not connected (per datasheet) |
| Pin 17 | NC — Not connected (per datasheet) |
| Pin 18 | NC — Not connected (per datasheet) |
| Pin 19 | NC — Not connected (per datasheet) |
| Pin 20 | PGND/EP — Exposed thermal pad - connect to large copper pour on PCB |
Typical Applications
TPS26636PWPR is suitable for 7 applications: 24-V Industrial PLC I/O Protection, 48-V Telecom Rectifier Secondary Protection, Factory Automation Sensor Backplane, USB-PD 20-V Sink Hot-Swap Protection, Motor Drive Auxiliary 24-V Rails, E-mobility 12-V/24-V Accessory Power, Industrial Sensor Distributed Bus.
24-V Industrial PLC I/O Protection
The TPS26636PWPR is well suited to 24-V industrial PLC I/O module protection, where field wiring can experience sustained overcurrent from sensor shorts to ground or backplane faults. Its 4.5-V to 60-V input range cleanly covers 24-V nominal with 60-V transient headroom, while the 31 mΩ integrated FET holds conduction loss to roughly 0.5 W at 4 A continuous - cool enough for sealed PLC enclosures. The programmable output power limit prevents a sustained 24-V short from drawing 6 A indefinitely, which would otherwise over-dissipate field wiring harnesses. Placed between the field connector and the input buffer, it provides reset-on-fault behavior instead of a blown fuse, with the FLTb pin feeding the PLC CPU for diagnostic logging.
Recommended
48-V Telecom Rectifier Secondary Protection
Secondary-side protection of 48-V telecom rectifier outputs is a classic use case for the TPS26636PWPR. With battery backup voltages ranging from 42 V to 58 V float, the TPS26636's 4.5-V to 60-V input window covers the full battery envelope, and the 0.6-A to 6-A adjustable limit accommodates both low-power subscriber boards and higher-current RF power amplifier taps. The integrated surge clamp saves the BOM cost of a discrete 75-V TVS at each breaker input. Designers select the IMON output for system-level current telemetry, while FLTb drives a central alarm LED. For multi-point protection, multiple TPS26636PWPR parts per shelf provide selective coordination with upstream 60-A breakers.
Recommended
Factory Automation Sensor Backplane
Factory automation sensor backplanes mix low-current analog sensors (4 mA to 20 mA loops) and higher-current actuator outputs in one shared rail, which makes a resettable eFuse like the TPS26636PWPR an efficient protection choice. Setting ILIM to 0.6 A defends against sensor shorts without nuisance-tripping analog loops, while the dVdT pin sets a soft-start for capacitive field wiring that can be hundreds of meters long. The HTSSOP-20 package fits standard 4-wire backplane connectors and supports both 'vertical-thru' and 'right-angle' SMT layouts. When a worker drops a screwdriver across a channel, the TPS26636 latches off (configurable auto-retry), reports via FLTb, and protects the line driver.
Recommended
USB-PD 20-V Sink Hot-Swap Protection
The TPS26636PWPR can serve as the 20-V / 5-A rail hot-swap gate for USB Power Delivery sink applications such as laptops, monitors, and 5G small cells. Although not a PD controller itself, it sits behind the Type-C port and protects downstream PD stage from cable crosstalk transients and connector pin shorts. The 60-V input rating easily handles the maximum USB-PD EPR voltage levels, while the 6-A current limit and 31 mΩ RDS(on) suit 100-W PD classes without saturating. Inrush is managed by the dVdT pin so the upstream Type-C connector is not back-fed with high di/dt. The FLTb flag drives the system PD controller for fast policy recovery.
Recommended
Motor Drive Auxiliary 24-V Rails
Industrial servo drives and variable-frequency motor controllers host a 24-V control rail that powers gate drivers, encoder feedback, and I/O modules. The TPS26636PWPR protects this rail against motor regenerated back-EMF transients that can ride back through shared power supplies, using its integrated surge clamp to absorb moderate inductive events. The 31 mΩ RDS(on) keeps dissipation low even at full 6-A peak (only ~1.1 W), and the PowerPAD thermal pad keeps junction temperatures well below the thermal shutdown threshold. Compared to a discrete polyfuse, the TPS26636 re-enables automatically, saving field service trips after brief fault events.
Recommended
E-mobility 12-V/24-V Accessory Power
Light e-mobility platforms (e-bikes, electric scooters, AGV shuttles) need a 12-V/24-V accessory rail protected against back-EMF from solenoids, brake choppers, and DC-DC converter inrush. The TPS26636PWPR sits between the auxiliary battery and DC-DC converters, handling inrush with its dVdT pin and quickly isolating faults on accessory branches. With an adjustable current limit from 0.6 A to 6 A, the same TPS26636 part covers both LED lighting rails (low ILIM) and 12-V accessory sockets (high ILIM). For AEC-Q100 automotive environments, select a TPS2660x-Q1 variant instead, since the standard TPS26636PWPR is not automotive qualified.
Recommended
Industrial Sensor Distributed Bus
Distributed bus architectures (PROFIBUS, FOUNDATION Fieldbus, IO-Link) feed dozens of field sensors from a single trunk, where one shorted sensor could otherwise take down an entire segment. Placing a TPS26636PWPR per branch limits the fault current to 0.6-6 A and isolates the segment via the FLTb signal. With a 31 mΩ RDS(on) and integrated surge clamp, each branch breaker adds only ~0.05 W at 250 mA - negligible impact on the trunk's 24-V power budget. The HTSSOP-20 package is well suited to standard branch-connector PCB modules, supporting automated assembly for high-volume sensor hub deployments.
Recommended
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Engineering reference data for TPS26636PWPR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS26633PWPR | TPS26635PWPR | TPS26630PWPR | TPS26631PWPR |
|---|---|---|---|---|---|
| Package | HTSSOP-20 (PWP) | HTSSOP-20 (PWP) - same | HTSSOP-20 (PWP) - same | HTSSOP-20 (PWP) - same | HTSSOP-20 (PWP) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Input Voltage Range | 4.5 V to 60 V | 4.5 V to 60 V | 4.5 V to 60 V | 4.5 V to 60 V | 4.5 V to 60 V |
| On-Resistance (RDSon, typ) | 31 mΩ | 31 mΩ | 31 mΩ | 31 mΩ | 31 mΩ |
| Adjustable Current Limit Range | 0.6 A to 6 A | 0.6 A to 6 A | 0.6 A to 6 A | 0.6 A to 6 A | 0.6 A to 6 A |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C |
Key Differentiators
- Output power limiting (analog VIN × IOUT fold-back) (vs TPS26633PWPR)
- Wide input voltage range with same package (vs TPS26630PWPR)
- Pin-compatible family scaling (vs TPS26635PWPR)
Design Notes
Estimated: At VIN=24 V, VOUT=12 V, and 6 A continuous load, internal FET dissipation is (VIN - VOUT) × IOUT = 72 W if the device is in current limit; in normal operation, dissipation is I² × R = 36 × 0.031 = 1.12 W. The HTSSOP-20 PowerPAD θJA is around 35-40 °C/W on a 1 sq. inch copper pour, giving a temperature rise of ~40 °C above ambient - well below the 150 °C thermal shutdown. For sustained fault conditions (short to ground), the output power-limit fold-back will keep dissipation below the rated envelope. Designer's tip: use at least 16 thermal vias at 1.2 mm pitch under the EP to maximize heat flow.
Place the input capacitor between IN (pin 10-11) and PGND (pin 12-14) within 2-3 mm of the pins, using a low-ESR ceramic of at least 10 µF to absorb load-step transients and offset the input trace inductance. Place the output capacitor between OUT (pin 8-9) and PGND with similar proximity. Keep the high-current loop (IN → OUT → PGND) as tight as physically possible to minimize switching transients. Use wide copper pours (at least 0.5 mm wide) for IN, OUT, and PGND paths, and stitch the EP to PGND with a continuous copper pour on top layer plus thermal vias. Following TI's HTSSOP layout guidelines in SLUAe18-style user guides is recommended.
Common pitfalls when designing with the TPS26636PWPR: (1) Do not float the EN/UVLO pin - always tie it through a resistor divider to set the desired turn-on voltage, or to VIN if a fixed threshold is acceptable. (2) The dVdT capacitor value controls inrush; too large a value delays startup, too small a value causes high peak currents. Start with 100 nF for typical 24-V/6-A inputs. (3) The IMON output requires a buffer or ADC for high-impedance measurement - it cannot drive heavy loads. (4) The PL pin resistor divider programs power limiting; leaving PL floating disables power limiting (the TPS26636 then behaves similarly to TPS26633). (5) Reverse-blocking configuration requires specific pin-strap settings; verify in datasheet.
Recommended PCB layout pattern: keep the AGND reference (pin 1 and analog pin caps) separated from PGND with a star-connection topology to prevent high-current return paths from disturbing analog IMON measurements. Use guard traces around the IMON pin to reduce noise pickup. The FLTb open-drain output benefits from a 100 kΩ pull-up to a 3.3-V or 5-V logic rail for fault monitoring. For multi-board designs, daisy-chain FLTb across multiple TPS26636PWPR parts so a single MCU pin can monitor all segment faults. TI's reference design layout (typically in the datasheet figures) demonstrates 4-layer 1 oz copper with thermal via arrays under the EP.
Compliance Information
RoHS compliant and Pb-free per Texas Instruments product page (suffix 'PWP' denotes lead-free matte-tin finish, 20-HTSSOP Pb-free construction). Not AEC-Q100 qualified - this part targets industrial and telecom, not automotive; for AEC-Q100 24-V automotive loads, use the automotive-grade TPS2660x-Q1 family. Halogen-free status and conflict-minerals compliance were not explicitly stated in the verified web data; halogen-free marked as 'unknown' pending datasheet confirmation.
