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Introduction, characteristics, and applications of Texas Instruments TPS22999 on-resistance load switch

2/19/2024 9:05:00 AM

Abstract: Single channel load switches are designed to achieve fast on-time with low inrush current.

TPS22999 Texas Instruments

The Texas Instruments TPS22999 on-resistance load switch is a single-channel load switch designed to achieve fast on-time with low inrush current. This load switch features an n-channel MOSFET, operates over an input voltage range of 0.1V to V(BIAS) -1V, and supports a maximum continuous current of 1.5A. The TPS22999 load switch integrates a 5.3-ohm fast output discharge path, allowing reliable system operation when the switch is closed. This load switch has a power good (PG) signal that indicates when the main MOSFET is properly placed in the lowest resistance path. The TPS22999 load switch operates over the -40°C to 105°C free air temperature range and is available in a 0.35mm pitch and 8-pin WCSP package (YCH). Typical applications include wearable devices, solid state drives (SSDs), PCs and laptops, industrial PCs and optical modules.


characteristic

  • Input operating voltage range (V(IN))

  • 2.3V to 5.5V bias voltage range

  • Maximum continuous current 1.5A

  • 7.5 milliohms (typ) on-resistance (R(ON))

  • Stable voltage surge

  • 5.3 ohm integrated fast output discharge

  • Open drain power supply - good (PG) signal

  • Less than 200μs at V(IN) = 1V turn-on

  • Thermal shutdown

  • Undervoltage lockout (UVLO)

  • Low power consumption:

    • 10μA (typ) ON state (I(Q))

    • 2.7μA (typ) OFF state (I(SD))

  • Smart EN pin pull-down (R(PD,EN)):

    • 25nA(typ)EN≥V(IH) (I(ON))

    • 500k ohms (typ)EN≤V(IL) (R(PD,ON))


app

  • wear.

  • solid state drive (ssd)

  • PCs and laptops

  • Industrial computer

  • Optical module


Typical application diagram



block diagram


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