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TPS2051BDGN

500mA high-side power switch, 70mOhm Ron, 2.7V-5.5V, current limit/OTP/UVLO, MSOP-8 PowerPAD

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Manufacturer Part：

TPS2051BDGN

Package：

8-MSOP PowerPAD (3 x 3 mm)

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Description

Product Overview

The TPS2051BDGN from Texas Instruments is a single-channel, current-limited power-distribution switch with an N-channel MOSFET output. It supports 2.7V to 5.5V load voltage, 500mA maximum output current, 70mohm on-resistance, and features current limiting, over-temperature, and UVLO protection in an 8-MSOP PowerPAD package.

Key Specifications

Manufacturer Texas Instruments
Switch Type General Purpose, High Side
Number of Outputs 1
Load Voltage 2.7V ~ 5.5V
Max Output Current 500mA
Rds On (typ) 70 mOhm
Fault Protection Current Limiting, OTP, UVLO
Input Type Non-Inverting
Package 8-MSOP PowerPAD (3 x 3mm)
Operating Temperature -40°C ~ 85°C

Features

  • High-side N-channel MOSFET power switch
  • 500mA maximum continuous output current
  • 70mohm typical on-resistance
  • Fixed current limiting for fault protection
  • Over-temperature shutdown protection
  • Undervoltage lockout (UVLO)
  • Status flag output for fault indication
  • 8-MSOP PowerPAD for efficient thermal dissipation

Applications

  • USB power management and port protection
  • Hot-plug power supply control
  • Peripheral power switching in PCs
  • Industrial load switching and protection
  • Battery-powered system power routing

The Texas Instruments TPS2051BDGN is a single-channel current-limited power-distribution switch designed for applications requiring controlled power routing with robust fault protection. The device integrates an N-channel MOSFET with 70mohm typical on-resistance and supports load voltages from 2.7V to 5.5V with up to 500mA continuous current. Built-in current limiting, over-temperature shutdown, and undervoltage lockout protect both the switch and the downstream circuitry from fault conditions. A status flag output provides real-time fault indication to the system controller. The 8-MSOP PowerPAD package ensures efficient thermal management in space-constrained designs.

The TPS2051BDGN operates as a controlled high-side power switch with three main protection subsystems: 1) N-Channel MOSFET Switch: The integrated N-channel MOSFET connects the input supply to the load when enabled. The gate drive circuit ensures the MOSFET is fully enhanced for low 70mohm on-resistance. 2) Current Limiting: When the output current exceeds the fixed threshold (approximately 1A typical), the current-limiting circuit reduces the gate drive to limit the output current, protecting the switch and downstream components. 3) Thermal Protection: A thermal sensor monitors the junction temperature and shuts down the MOSFET if it exceeds approximately 140°C. The device automatically restarts when the temperature drops below the threshold. UVLO ensures the switch remains off until the input voltage is above the minimum operating level.

Pin Name Type Function
1 IN Power Input supply voltage (2.7V-5.5V)
2 IN Power Input supply voltage (connected internally)
3 ON Input Active-high enable input (non-inverting)
4 GND Ground Ground connection
5 FLG Output Fault status flag (active-low, open-drain)
6 NC – No connection
7 OUT Output Switched output to load
8 OUT Output Switched output (connected internally)
Pad PowerPAD Thermal Thermal pad, connect to GND plane
  • USB port power distribution and overcurrent protection in PCs and hubs
  • Hot-plug power supply control in removable peripherals
  • Industrial load switching with fault detection and reporting
  • Battery-powered systems requiring controlled power routing
  • General-purpose high-side power switching with protection
Manufacturer Part Number Package Notes
TI TPS2052BDGN 8-MSOP Dual channel version
TI TPS2041BDGN 8-MSOP P-channel, 200mA, complementary
Diodes Inc AP2171MPG-13 MSOP-8 Similar function, 500mA
TI TPS22915BYFPR DSBGA-4 2A load switch, smaller package
onsemi NCP380LSNAAT1G DFN-8 Adjustable current limit
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All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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