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TPS22980

AKTIV

Thunderbolt-Host/Peripherie-Leistungs-Multiplexer

Produktdetails

Number of input channels 2 IN1 rDS(on) (typ) (mΩ) 250 IN2 rDS(on) (typ) (mΩ) 250 IN1 output current (max) (A) 1.5 IN2 output current (max) (A) 1.5 Rating Catalog Quiescent current (Iq) (µA) 150 Operating temperature range (°C) -40 to 85 FET Internal Imax (A) 0.5 Features Adjustable current limit, Inrush current control, Reverse current blocking, Thermal shutdown Device type Power muxes Function Adjustable current limit, Reverse current blocking, Thermal shutdown
Number of input channels 2 IN1 rDS(on) (typ) (mΩ) 250 IN2 rDS(on) (typ) (mΩ) 250 IN1 output current (max) (A) 1.5 IN2 output current (max) (A) 1.5 Rating Catalog Quiescent current (Iq) (µA) 150 Operating temperature range (°C) -40 to 85 FET Internal Imax (A) 0.5 Features Adjustable current limit, Inrush current control, Reverse current blocking, Thermal shutdown Device type Power muxes Function Adjustable current limit, Reverse current blocking, Thermal shutdown
VQFN (RGP) 20 16 mm² 4 x 4
  • Powered From 3.3V
  • 4.5V to 19.8V High Voltage Switch
  • 3V to 3.6V Switch
  • Adjustable Current Limit
  • Thermal Shutdown
  • Make Before Break Switch
  • High Voltage Discharge Before Low Voltage Make
  • Reverse Current Blocking
  • Powered From 3.3V
  • 4.5V to 19.8V High Voltage Switch
  • 3V to 3.6V Switch
  • Adjustable Current Limit
  • Thermal Shutdown
  • Make Before Break Switch
  • High Voltage Discharge Before Low Voltage Make
  • Reverse Current Blocking

The TPS22980 is a current-limited power mux providing a connection to a peripheral device from either a low voltage supply (3.0V up to 3.6V) or a high voltage supply (5V up to 18V). The desired output is selected by digital control signals.

The high voltage (VHV) and low voltage (V3P3) switch current limits are set with external resistance. Once the current limit is reached, the TPS22980 will control the switch to maintain the current at the limit.

When the high voltage supply is not present, the TPS22980 will maintain the connection to the output from the low voltage supply. When a high voltage line and high voltage enable signal is detected by the device, the high voltage switch will be turned on in conjunction with the low voltage switch until a reverse current is detected by the low voltage switch. The low voltage switch is then disabled allowing a seamless transition from a low voltage to a high voltage supply with minimal drop and shoot-through current.

To prevent current backflow during a transition from a VHV connection to a V3P3 connection, the TPS22980 will break the VHV connection and discharge the output to approximately 3.3V. Once the output reaches 3.3V the device will connect V3P3 switch. If a load is present, the output will transition to 0V before returning to 3.3V.

The TPS22980 is available in a 4mm x 4mm x 1mm QFN package.

The TPS22980 is a current-limited power mux providing a connection to a peripheral device from either a low voltage supply (3.0V up to 3.6V) or a high voltage supply (5V up to 18V). The desired output is selected by digital control signals.

The high voltage (VHV) and low voltage (V3P3) switch current limits are set with external resistance. Once the current limit is reached, the TPS22980 will control the switch to maintain the current at the limit.

When the high voltage supply is not present, the TPS22980 will maintain the connection to the output from the low voltage supply. When a high voltage line and high voltage enable signal is detected by the device, the high voltage switch will be turned on in conjunction with the low voltage switch until a reverse current is detected by the low voltage switch. The low voltage switch is then disabled allowing a seamless transition from a low voltage to a high voltage supply with minimal drop and shoot-through current.

To prevent current backflow during a transition from a VHV connection to a V3P3 connection, the TPS22980 will break the VHV connection and discharge the output to approximately 3.3V. Once the output reaches 3.3V the device will connect V3P3 switch. If a load is present, the output will transition to 0V before returning to 3.3V.

The TPS22980 is available in a 4mm x 4mm x 1mm QFN package.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet 3.3-V to 18-V MUX With Overcurrent Limit datasheet (Rev. C) 30 Sep 2013
EVM User's guide TPS22980EVM User's Guide 28 Okt 2011

Design und Entwicklung

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Simulationsmodell

TPS22980 IBIS Model

SLVM734.ZIP (9 KB) - IBIS Model
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Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
VQFN (RGP) 20 Ultra Librarian

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