TPS2051BDBVR Power-Distribution Switch: Diagram, Pinout, and Datasheet

The TPS2051BDBVR power-distribution switch is designed for applications that are likely to experience heavy capacitive loads and short circuits.

For power-distribution systems that require many power switches in a single package, this device includes 70-m N-channel MOSFET power switches. A logic enable input is used to control each switch. An internal charge pump provides gate drive, controlling the power-switch rise and fall times to reduce current surges while switching. The charge pump does not require any external components and can work with voltages as low as 2.7 V.

When the output load exceeds the current-limit threshold or there is a short, the device switches to constant-current mode and pulls the overcurrent (OCx) logic output low, limiting the output current to a safe level. A thermal protection circuit shuts off the switch to prevent damage when large overloads and short circuits increase the power dissipation in the switch, causing the junction temperature to rise. Once the device has cooled sufficiently, it will automatically recover from a thermal shutdown. The switch is kept off until a valid input voltage is present, thanks to internal circuitry. The current limit on this power distribution switch is set at 1 A. (typical).

The following figure is TPS2051BDBVR Pinout.

Pinout

The followings are TPS2051BDBVR Symbol, Footprint and 3D Model.

Symbol

Footprint

3D Model

• 70-mΩ High-Side MOSFET

• 500-mA Continuous Current

• Thermal and Short-Circuit Protection

• Accurate Current Limit (0.75 A Minimum, 1.25 A Maximum)

• Operating Range: 2.7 V to 5.5 V • 0.6-ms Typical Rise Time

• Undervoltage Lockout

• Deglitched Fault Report (OC)

• No OC Glitch During Power Up

• Maximum Standby Supply Current: 1-μA (Single, Dual) or 2-μA (Triple, Quad)

• Ambient Temperature Range: –40°C to 85°C 

• UL Recognized, File Number E169910

• Additional UL Recognition for TPS2042B and TPS2052B for Ganged Configuration

The following figure is TPS2051BDBVR Functional Block Diagram.

Functional Block Diagram

• Connect the IN and  GND  pins with a low-inductance trace, and place the 100-nF bypass capacitor near the IN and GND pins.

• When strong transient currents are predicted on the output, a high-value electrolytic capacitor and a 100-nF bypass capacitor should be placed on the output pin.

• A wide and short copper trace should be used to link the PowerPAD to the  PCB  ground plane.

Layout

• Heavy Capacitive Loads

• Short-Circuit Protections

The following figure is TPS2051BDBVR Package.

Package