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TPS2034DR

2.2A USB power switch, 33-mΩ, 2.7-5.5V, active-high enable, overcurrent output, 8-pin SOIC

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Pieza del fabricante：

TPS2034DR

Paquete：

8-Pin SOIC (4.9 x 3.9 x 1.27 mm)

Marca：
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Descripción

Productos

The TPS2034DR is a Texas Instruments 2.2-A, 2.7-5.5 V single-channel USB power distribution switch with a 33-mΩ N-channel MOSFET high-side switch. It features short-circuit and thermal protection, overcurrent logic output, undervoltage lockout, and active-high enable. The device is packaged in an 8-pin SOIC and operates from -40°C to +125°C.

Especificaciones

Current Limit 3 A peak, 2.2 A continuous
On Resistance 33 mΩ (5 V input)
Tensión de alimentación 2.7 V to 5.5 V
Rise Time 6.1 ms (typical)
Standby Current 10 µA (max)
ESD Protection 2 kV HBM
Paquete 8-Pin SOIC

Características

  • 33-mΩ high-side MOSFET switch
  • Short-circuit and thermal protection
  • Overcurrent logic output (OC)
  • 2.7 V to 5.5 V operating range
  • Logic-level enable input
  • Undervoltage lockout
  • Maximum standby current: 10 µA
  • UL Listed (File No. E169910)

Aplicaciones

  • USB power distribution
  • Hot-plug power supply switching
  • PCMCIA slot power control
  • General-purpose high-side switching
  • Notebook computer peripheral power

The TPS2034DR is a Texas Instruments power distribution switch intended for USB applications where heavy capacitive loads and short circuits are likely. It features a 33-mΩ N-channel MOSFET high-side power switch controlled by a logic-level enable input compatible with 5-V and 3-V logic. An internal charge pump controls rise and fall times to minimize current surges. When the output load exceeds the 3-A current limit threshold, the device limits current and pulls the overcurrent (OC) output low. Thermal protection shuts off the switch if junction temperature rises excessively. Undervoltage lockout ensures the switch remains off until valid input voltage is present.

The TPS2034DR operates as a high-side power switch with three subsystems: (1) The charge pump generates gate drive voltage for the N-channel MOSFET from the 2.7-5.5 V supply, enabling the low 33-mΩ on-resistance. The charge pump also controls the rise and fall times (~6.1 ms) to limit inrush current when switching into capacitive loads. (2) The current limit circuit monitors output current and transitions to constant-current mode at 3 A, pulling the open-drain OC output low to signal the fault condition. (3) The thermal protection circuit monitors junction temperature and shuts off the switch if it exceeds the safe operating limit, with automatic recovery once the device cools. Undervoltage lockout keeps the switch off when input voltage is below the 2.2 V threshold.

Pin Mnemonic Descripción
1 ES Enable input (active high)
2 GND Suelo
3-5 EN Power input (3 pins for current handling)
6 OC Overcurrent output (open drain, active low)
7,8 OUT Power output (2 pins)
  • USB port power switching with 2.2-A current limit and fault reporting
  • Hot-plug power supply control in PCMCIA and CardBus slots
  • Notebook computer peripheral power distribution with inrush limiting
  • General-purpose high-side switching with short-circuit protection
  • Battery-powered system load switching with 10 µA standby current
Modelo Fabricante Diferencia clave
TPS2031DR TI 0.9 A current limit
TPS2032DR TI 1.5 A current limit
TPS2033DR TI 2.2 A current limit
TPS2041DR TI Active-low enable version
LTC1474 ADI Similar USB power switch
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