BTS70081EPRXUMA1 - 11A Smart High-Side Power Switch | Infineon
MPN: BTS70081EPRXUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.88 | $28.80 |
| 100 | $2.55 | $255.00 |
| 500 | $2.21 | $1,105.00 |
| 1,000 | $1.95 | $1,950.00 |
BTS70081EPRXUMA1 Overview
A high-side switch (also called a high-side driver) is a power-distribution building block that sits between the supply rail and the load, turning the load on and off with a logic-level control signal while protecting the wiring harness and the upstream ECU from fault currents. High-side switches belong to the broader family of smart power switches (also called PROFET in the Infineon product line) and sit hierarchically under power distribution ICs, power management ICs, and finally the semiconductor device category. They are a higher-level alternative to discrete MOSFETs plus fuses, because protection, sensing, and diagnostics are integrated inside the same silicon die.
Key features include a typical on-state resistance R_DS(on) of 8 mOhm at 25 C, an adjustable current limit up to 11 A, very low standby current in the microampere range, and built-in reverse-battery protection via the integrated body-diode/clamp structure. The PG-TSDSO-14-22 package exposes a thermal pad that drops junction-to-ambient thermal resistance to roughly 35 C/W on a 2s2p FR4 1 oz board, enabling continuous 11 A operation without an external heatsink in most automotive body and chassis applications.
Internally the BTS70081EPR uses Infineon's vertical N-channel DMOS output stage driven by a charge pump and gate control logic. A sense current output pin (IS) provides an analog load-current proportional signal for ADC monitoring and current-based fault detection. The digital status output reports latched fault conditions that the ECU can read via a dedicated input pin (IN) and acknowledge through the DEN (diagnostic enable) pin.
Typical applications include automotive body control modules driving resistive bulbs, LED lighting modules, seat heaters, mirror heaters, and DC motors such as window lifters and sunroofs. The wide 6 V to 28 V operating range also suits 24 V industrial bus systems and process-control actuator drivers.
When designing with this part, keep the IN/DEN logic lines away from the power output trace, and use a 100 nF X7R bypass directly at the Vbb pin. The exposed pad must be soldered to a copper area of at least 1 cm^2 to meet the datasheet thermal resistance; otherwise the device may thermal-limit below 11 A. For EMC compliance, place a small ferrite bead or RC snubber on the output when switching inductive loads.
This page synthesizes distributor pricing from DigiKey, Mouser, Arrow, and Newark, drop-in alternative candidates from Infineon's PROFET family, and practical design notes not collected in the manufacturer datasheet alone.
Drop-in alternatives for BTS70081EPRXUMA1 — 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 BTS70081EPRXUMA1 (same form factor and footprint) — differing in Package, Number of Channels, Operating Temperature, Operating Temperature Range, Automotive Qualified.
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View Datasheet →BTS70081EPRXUMA1 Maximum Ratings & Electrical Characteristics
| Function | Smart High-Side Power Switch (1:1 N-Channel) |
| Number of Outputs | 1 |
| On-State Resistance (R_DS(on) typ) | 8 mOhm at 25 C |
| Continuous Output Current | 11 A |
| Operating Supply Voltage (Vbb) | 6 V to 28 V |
| Operating Temperature Range | -40 C to +150 C (junction) |
| Package | PG-TSDSO-14-22 (TSSOP-EP-14) |
| Pin Count | 14 |
| Mounting Type | Surface Mount |
| Thermal Resistance R_theta_JA | 35 C/W (2s2p 1 oz FR4, per datasheet) |
| Diagnostic Features | Open-load, short-to-GND, short-to-Vbb, overtemperature, sense current output |
| Reverse Battery Protection | Yes (integrated) |
| Automotive Qualified | Yes (AEC-Q100, PG-TSDSO-14-22 automotive grade) |
| RoHS Compliance | Compliant |
BTS70081EPRXUMA1 Pin Configuration
| Pin 1 | OUT — Power output to load |
| Pin 2 | NC — Not connected (per datasheet) |
| Pin 3 | Vbb — Battery supply input (6 V to 28 V) |
| Pin 4 | GND — Ground reference |
| Pin 5 | IN — Logic input (on/off control, 3.3 V/5 V TTL) |
| Pin 6 | DEN — Diagnostic enable input |
| Pin 7 | IS — Sense current output (analog proportional to load current) |
| Pin 8 | NC — Not connected (per datasheet) |
| Pin 9 | OUT — Power output to load |
| Pin 10 | OUT — Power output to load |
| Pin 11 | OUT — Power output to load |
| Pin 12 | OUT — Power output to load |
| Pin 13 | OUT — Power output to load |
| Pin 14 | OUT — Power output to load (also thermal pad) |
Typical Applications
BTS70081EPRXUMA1 is suitable for 6 applications: Automotive Body Control Module - Resistive Bulb Driver, Automotive LED Lighting Module, Automotive Seat Heater Driver, DC Motor Driver (Window Lifter / Sunroof), 24 V Industrial Actuator and Solenoid Driver, Mirror Heater / Rear Defogger Driver.
Automotive Body Control Module - Resistive Bulb Driver
The BTS70081EPRXUMA1 fits automotive BCM bulb driver applications because its 8 mOhm R_DS(on) and 11 A continuous rating cover incandescent and halogen bulb inrush. Driving a 55 W H7 headlamp bulb at 13.5 V draws about 4 A continuous with 6x inrush at cold filament, well inside the device's adjustable current limit. The AEC-Q100 qualification plus reverse-battery protection eliminates the need for an external reverse diode, reducing BOM cost and PCB area versus discrete MOSFET designs in the same BCM footprint.
Recommended
Automotive LED Lighting Module
The BTS70081EPRXUMA1 is well matched to automotive LED lighting such as daytime running lamps, tail lamps, and interior LED strings because the integrated slew-rate control limits inrush and the open-load diagnostic detects disconnected LED modules in the field. At a typical LED string current of 1-2 A, the device's 8 mOhm R_DS(on) dissipates well under 50 mW, enabling a small copper pour without an external heatsink. AEC-Q100 qualification plus the wide 6 V to 28 V supply range covers cold-start, cranking, and load-dump transients in 12 V automotive systems.
Recommended
Automotive Seat Heater Driver
The BTS70081EPRXUMA1 suits automotive seat heater PWM control because its 8 mOhm R_DS(on) and 11 A continuous rating easily handle the typical 5-8 A seat-heater element current at 12 V. The device's adjustable slew rate controls EMI on the seat-harness wiring, a critical concern for adjacent radio and CAN bus circuits. Integrated overtemperature and short-to-ground protection disconnects the heating element before the wiring harness can overheat, meeting OEM safety requirements. The exposed thermal pad supports continuous operation without a heatsink in the seat module enclosure.
Recommended
DC Motor Driver (Window Lifter / Sunroof)
The BTS70081EPRXUMA1 works as a half-bridge leg or simple high-side driver for automotive window-lifter and sunroof DC motors drawing up to 11 A peak. Integrated current-limit feedback through the IS pin lets the ECU stall the motor without an external current-sense amplifier, cutting BOM cost. Reverse-battery and load-dump tolerance remove the need for external protection components on the harness. For bi-directional motor control, two BTS70081EPR devices in an H-bridge configuration share the same PG-TSDSO-14-22 footprint, simplifying PCB layout reuse.
Recommended
24 V Industrial Actuator and Solenoid Driver
The BTS70081EPRXUMA1 fits 24 V industrial applications such as PLC digital outputs, solenoid valves, and relay coils because its 6 V to 28 V supply range covers the full 24 V nominal bus including transients. The 11 A continuous rating handles industrial solenoid inrush, and the adjustable current limit prevents coil overheating during valve-closed hold states. Open-load and short-circuit diagnostics report wiring faults back to the PLC over the IS pin. The exposed thermal pad maintains junction temperature within industrial -40 C to +85 C ambient without a heatsink.
Recommended
Mirror Heater / Rear Defogger Driver
The BTS70081EPRXUMA1 mirrors rear-window defogger and side-mirror heater grids with its 11 A continuous rating and 8 mOhm R_DS(on) easily handling the 5-7 A typical current at 13.5 V. Integrated short-to-ground detection immediately disconnects the heating grid if the wiring chafes, a critical safety feature for high-current rear-glass circuits. The exposed thermal pad plus PWM capability lets the ECU implement soft-start and proportional heat control without external FETs. AEC-Q100 qualification supports underhood mounting near the rear-glass harness connector.
Recommended
Recommended Products Summary
Engineering reference data for BTS70081EPRXUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BTS70402EPGXUMA1 | BTS710336ESAXUMA1 | BTS51202EKAXUMA1 | BTS3028SDRATMA1 | BTG7003A1EPWXUMA2 |
|---|---|---|---|---|---|---|
| Package | PG-TSDSO-14-22 (TSSOP-EP-14) | PG-TSDSO-14-22 - same | PG-TSDSO-14-22 - same | PG-TSDSO-14-22 - same | PG-TSDSO-14-22 - same | PG-TSDSO-14-22 - same |
| Brand | Infineon | Infineon - same brand | Infineon - same brand | Infineon - same brand | Infineon - same brand | Infineon - same brand |
| Number of Channels | 1 | 1 | Multiple | 1 | 1 | 1 |
| Operating Voltage (Vbb) | 6 V to 28 V | 6 V to 28 V (same) | 6 V to 28 V (same) | 6 V to 28 V (same) | 6 V to 28 V (same) | 6 V to 28 V (same) |
| Automotive Qualified (AEC-Q100) | Yes | Yes | Yes | Yes | Yes | Yes |
| Diagnostic Feedback (IS pin) | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Single-channel PROFET in compact PG-TSDSO-14-22 footprint (vs BTS710336ESAXUMA1)
- Lower R_DS(on) and higher current headroom (vs BTS51202EKAXUMA1)
- Mature, broadly available PROFET 12 V family part (vs BTS3028SDRATMA1)
Design Notes
Estimated: at 11 A continuous, Vbb = 13.5 V, V_OUT = 13 V, the device dissipates approximately 11 A x 0.5 V = 5.5 W (including R_DS(on) loss). With theta_JA = 35 C/W on a 2s2p 1 oz FR4 board, the junction rises by 35 C/W x 5.5 W = 192 C above ambient, which exceeds the 150 C maximum junction rating at room temperature. Solder the exposed thermal pad to at least 1 cm^2 of copper on top and bottom layers and use thermal vias to spread heat; otherwise derate to 7-8 A continuous or mount on an aluminum substrate. Always cross-check the thermal resistance figure against the latest Infineon PG-TSDSO-14-22 application note.
Place a 100 nF X7R ceramic bypass capacitor directly at the Vbb pin (pin 3) within 2 mm of the package, plus a 10 uF bulk electrolytic on the same node. Route the OUT pins (1, 9-14) as a wide polygon to share current and reduce voltage drop. Keep the IN/DEN logic traces short and away from the OUT polygon to avoid capacitive coupling that could false-trigger the device. The exposed thermal pad must be soldered; dry solder joints there cause immediate thermal failure under load.
Do not connect a logic signal directly to the OUT pin when the device is unpowered - the OUT pin can back-feed the IC through the body diode. Always drive IN low before applying Vbb to avoid inrush glitches. The IS pin output is not a logic signal; route it through a sense resistor to a microcontroller ADC and never short it to ground. For inductive loads (relays, solenoids, motors), add a flyback TVS or freewheeling diode because the integrated clamp only protects against load-dump, not demagnetization energy from the load itself.
Place the device near the load connector to minimize the high-current trace length and reduce EMI. Use a star-ground topology with the device GND (pin 4) returning to the ECU ground star point; avoid sharing GND with the microcontroller analog ground to prevent current-sense noise injection. Thermal vias under the exposed pad should be 0.3 mm drill, 0.6 mm pad, plated shut or tented to prevent solder wicking. Keep the diagnostic IS trace short and shielded by ground on both sides to maintain analog accuracy.
Compliance Information
AEC-Q100 qualified per Infineon product page for automotive applications. RoHS compliant. PG-TSDSO-14-22 package is lead-free and halogen-free per Infineon material declaration.
