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TPS22959DNYT

15A load switch, 4.4mOhm, 0.8-5.5V, QOD, WSON-8 (3x3mm), controlled slew rate, -40 to +105C

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Manufacturer Part：

TPS22959DNYT

Package：

WSON-8 (DNY) 3.0 x 3.0 x 0.8 mm

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Description

Product Overview

The TPS22959DNYT from Texas Instruments is a 5.5V, 15A, 4.4mOhm load switch with integrated output discharge in a WSON-8 (3x3mm) package. Providing ultra-low on-resistance and high current capability, it is designed for power routing and sequencing in servers, networking equipment, and portable electronics.

Key Specifications

Input Voltage Range 0.8 V to 5.5 V
Bias Voltage 2.5 V to 5.5 V
On-Resistance 4.4 mOhm @ VIN=5V, VBIAS=5V
Max Continuous Current 15 A
Quiescent Current 20 uA (typ) @ VBIAS=5V
Shutdown Current 1 uA (typ) @ VBIAS=5V
Rise Time 2663 us @ VIN=5V (fixed slew rate)
Output Discharge Quick Output Discharge (QOD)
Operating Temperature -40C to +105C

Features

  • Ultra-low 4.4 mOhm on-resistance for minimal voltage drop at high current
  • 15A continuous current capability for high-power load switching
  • Controlled slew rate limits inrush current during turn-on
  • Quick Output Discharge (QOD) rapidly discharges output when switch is off
  • Separate bias supply (2.5-5.5V) ensures low RDS(on) across VIN range
  • Compact WSON-8 (3x3mm) package with thermal pad

Applications

  • Server and networking equipment power sequencing
  • SSD and storage device power switching
  • Portable electronics power rail management
  • Hot-plug and hot-swap power control

The TPS22959DNYT from Texas Instruments is a 5.5V, 15A load switch with ultra-low 4.4 mOhm on-resistance and integrated Quick Output Discharge (QOD) in a compact WSON-8 (3x3mm) package. The device operates with an input voltage range of 0.8V to 5.5V and a separate bias supply of 2.5V to 5.5V, which ensures low on-resistance across the entire input voltage range. The controlled slew rate limits inrush current during turn-on, protecting downstream components. When the switch is disabled, the QOD feature rapidly discharges the output capacitance through an internal resistor, ensuring a clean power-down. The device consumes only 20 uA quiescent current and 1 uA shutdown current at VBIAS=5V.

The TPS22959DNYT integrates a low-resistance N-channel MOSFET with control logic and protection circuits. (1) Main Switch: An N-channel power MOSFET with 4.4 mOhm on-resistance connects VIN to VOUT when enabled. A charge pump generates the gate drive voltage from the VBIAS supply to fully enhance the MOSFET even when VIN is as low as 0.8V. (2) Controlled Turn-On: The slew rate control circuit gradually increases the gate voltage, resulting in a controlled rise time of 2663 us at VIN=5V. This limits the inrush current into downstream capacitors, preventing voltage droop on the input rail. (3) Quick Output Discharge: When the switch is disabled, an internal discharge resistor (QOD) connects from VOUT to GND, rapidly discharging the output capacitance to ensure a clean power-down sequence. (4) Bias Supply: The separate VBIAS pin powers the internal control circuitry and charge pump. This allows the switch to maintain low RDS(on) even with very low VIN voltages.

Pin Name Type Function
1 VIN Power Input voltage (0.8-5.5V)
2 VIN Power Input voltage (0.8-5.5V)
3 ON Input Switch enable (active high)
4 VBIAS Power Bias supply for charge pump (2.5-5.5V)
5 GND Ground Ground reference
6 QOD I/O Quick output discharge pin
7 VOUT Output Switch output
8 VOUT Output Switch output
  • Server and networking equipment power sequencing with 15A current handling
  • SSD and storage device power switching with inrush current limiting
  • Portable electronics power rail management with ultra-low 4.4 mOhm RDS(on)
  • Hot-plug and hot-swap power control with QOD for clean power-down
Manufacturer Part Number Package Notes
TI TPS22966DNYT WSON-8 6A, dual channel
TI TPS22975DNYT WSON-8 8A, adjustable rise time
onsemi NCP45561IMNTWG DFN-8 5.5V, 12A load switch
Microchip MIC94070YC6 SC-70-6 2A, smaller package
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