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TPS22810TDBVRQ1

18V/3A automotive load switch, 80mOhm, adj slew rate, reverse current prot, SOT-23-6

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Manufacturer Part：

TPS22810TDBVRQ1

Package：

SOT-23-6 (2.9 x 1.6 x 1.3 mm)

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Description

Product Overview

The TPS22810TDBVRQ1 from Texas Instruments is an automotive-qualified 18V load switch with 80mOhm RDS(on), adjustable slew rate, and reverse current protection in a SOT-23-6 package.

Key Specifications

Function Load Switch with Adjustable Slew Rate
VIN Range 2.5V to 18V
RDS(on) 80 mOhm (max)
Continuous Current 3A
Slew Rate Control Adjustable via external capacitor
Reverse Current Protection Yes (active)
Quick Output Discharge Yes (QOD pin)
ON Pin Threshold 1.2V (logic-level)
Supply Current 30uA (typ, on)
Shutdown Current 0.5uA (typ)
AEC-Q100 Grade 1 (-40 to +125C)
Package SOT-23-6
Operating Temperature -40 to +125 C

Features

  • AEC-Q100 Grade 1 qualified for automotive
  • Adjustable output rise time for inrush current control
  • Active reverse current protection prevents backfeed
  • Quick output discharge (QOD) for fast turn-off
  • Thermal shutdown protection

Applications

  • Automotive power distribution
  • Hot-plug power sequencing
  • Industrial module power control
  • Battery-powered system power gating

The TPS22810TDBVRQ1 from Texas Instruments is an automotive-qualified 18V N-channel MOSFET load switch with integrated slew rate control and reverse current protection in a tiny SOT-23-6 package. Designed for power distribution and rail switching in automotive and industrial applications, the device can handle continuous currents up to 3A with a maximum on-resistance of 80mOhm. The adjustable output slew rate is set by a single external capacitor on the CT pin, allowing designers to precisely control inrush current during turn-on to prevent voltage droop on the input supply and eliminate the need for external soft-start circuitry. The active reverse current protection circuit monitors the voltage difference between VIN and VOUT and disconnects the MOSFET when VOUT exceeds VIN by approximately 30mV, preventing unwanted current flow from the output back to the input during power sequencing or fault conditions. The quick output discharge (QOD) feature provides a controlled discharge path for the output capacitance when the switch is turned off, ensuring a predictable power-down sequence. The logic-level ON pin (1.2V threshold) can be driven directly from 3.3V or 5V microcontroller GPIO pins. The TPS22810TDBVRQ1 is AEC-Q100 Grade 1 qualified, supporting operation from -40 to +125C ambient temperature, making it suitable for under-hood automotive applications. The ultra-low shutdown current of 0.5uA minimizes battery drain in always-on automotive systems.

The TPS22810TDBVRQ1 operates as an integrated N-channel MOSFET load switch with advanced control and protection features. Key subsystems include: (1) Power MOSFET Switch – an N-channel MOSFET with 80mOhm maximum on-resistance connects VIN to VOUT; a charge pump generates the gate voltage above VIN to fully enhance the MOSFET; (2) Adjustable Slew Rate – the CT pin connects to an internal current source that charges an external capacitor; the capacitor voltage controls the gate drive ramp rate; a larger CT capacitor produces a slower output rise time, reducing inrush current to capacitive loads; the rise time is approximately tR = CT x 560V/us (e.g., 10nF gives ~5.6ms rise time); (3) Reverse Current Protection – an active comparator monitors VIN – VOUT differential; when VOUT > VIN by approximately 30mV (indicating reverse current flow), the MOSFET is quickly turned off to block reverse current; this protects upstream circuitry during power sequencing and fault conditions; (4) Quick Output Discharge – when the switch is turned off, an internal 250-ohm (typical) discharge resistor connects between VOUT and GND via the QOD pin, rapidly discharging the output capacitance; this ensures a clean, predictable power-down; (5) Thermal Shutdown – an internal thermal sensor disables the MOSFET when junction temperature exceeds approximately 155C, with automatic recovery when the device cools below the hysteresis threshold.

Pin Name Function
1 VIN Input supply (2.5V to 18V)
2 GND Ground
3 ON Enable input (logic-level, >1.2V = on)
4 CT Slew rate control (connect external capacitor to GND)
5 VOUT Switch output (to load)
6 QOD Quick output discharge (connect to VOUT through external resistor)
  • Automotive camera module: switch 12V battery to camera with controlled inrush, prevent backfeed during sleep
  • Industrial PLC module: hot-plug module power with adjustable slew rate to limit inrush to 100mA
  • Battery-powered system: disconnect non-essential loads with 0.5uA off current for months of standby
  • Power sequencing: control turn-on order of multiple rails with reverse current protection during sequencing
Manufacturer Part Number Package Notes
TI TPS22810DBVR SOT-23-6 Non-automotive version
TI TPS22965DSGR WSON-6 5.5V/4A, lower voltage higher current
onsemi NCP45561IMNTWG-H DFN-6 5.5V/4A load switch
TI TPS22975DNYR SON-6 5.7V/6A with thermal shutdown
Richtek RT9742ANGQW DFN-6 5.5V/2A automotive load switch
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