Texas Instruments TPS2090DR

Overview

TPS2090DR from Texas Instruments is a dual-channel high-side power-distribution switch featuring two independent 80-mΩ N-channel MOSFETs, 250 mA continuous current per channel, 2.7-V to 5.5-V operating range, and integrated thermal/short-circuit protection with open-drain overcurrent outputs. It enables controlled hot-plug insertion in USB peripherals and portable docking stations.

For engineers reviewing the TPS2090DR datasheet, TPS2090DR pinout, TPS2090DR application, or TPS2090DR equivalent, key selection criteria include per-channel current limiting (0.5 A short-circuit trip), bidirectional switching capability, 2.5-ms typical rise time for EMI reduction, CMOS/TTL-compatible enable inputs, and SOIC-8 package compatibility with standard PCB layouts.

Technical Context

The TPS2090DR integrates an internal charge pump that drives the gate of each N-channel MOSFET above its source, enabling full enhancement down to 2.7 V input without external components. Each channel operates independently with dedicated enable (EN1/EN2) and overcurrent (OC) logic signaling.

Its dual thermal trip architecture isolates faults at ~140°C per switch while maintaining operation of the unaffected channel; recovery occurs automatically after ~20°C hysteresis cooling. Undervoltage lockout disables the switch below ~2 V to ensure safe power-up and hot-removal behavior.

Key Specifications

Pinout & Package

TPS2090DR is housed in an 8-pin SOIC (D) package with exposed pad not present; thermal resistance θJA = 172°C/W. Pin functions are validated per TI SLVS245C datasheet Section 5 (Terminal Functions).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel high-side power switch applications.

Compared with TPS2051BDR and TPS22965DSGR, the TPS2090DR uniquely delivers dual independent channels with per-switch thermal protection, shared OC signaling, and bidirectional operation - making it optimal for space-constrained, fault-tolerant multi-rail systems requiring coordinated hot-plug support.

Availability

TPS2090DR is available at Aetrix Electronics and suitable for USB peripheral control, portable docking stations, industrial I/O modules, and medical sensor hubs requiring stable component supply across production lifecycles.

Supply support for TPS2090DR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and consumer markets.

The TPS2090DR belongs to TI's power-distribution switch product line, designed specifically for robust, low-voltage hot-plug and load-switching applications where fault containment, EMI control, and supply voltage flexibility are critical.

FAQ

What is the maximum continuous current rating per channel for the TPS2090DR?

The TPS2090DR supports 250 mA continuous current per channel under recommended operating conditions (TA ≤ 85°C, VI(IN) = 2.7–5.5 V). This rating assumes proper PCB thermal design; derating applies above 25°C ambient per the dissipation table in the datasheet. The device also limits short-circuit current to approximately 0.5 A to prevent damage during faults.

Does the TPS2090DR support bidirectional current flow, and how is this implemented?

Yes, the TPS2090DR supports bidirectional current flow between INx and OUTx when the switch is enabled. This is enabled by its N-channel MOSFET high-side configuration and absence of intrinsic body diode blocking - allowing reverse current (e.g., from downstream capacitance discharge or back-powering) without latch-up or damage. The datasheet explicitly confirms "bidirectional switch" as a feature.

How does the overcurrent (OC) pin function on the TPS2090DR?

The OC pin on the TPS2090DR is an open-drain output asserted low during either overcurrent or overtemperature events on either channel. It is shared between both switches and remains low until the fault condition clears and junction temperature drops sufficiently. External pull-up is required; TI recommends a 10-kΩ resistor to VCC for reliable logic-level interfacing with microcontrollers or FPGA GPIOs.

What is the purpose of the internal charge pump in the TPS2090DR, and does it require external components?

The internal charge pump in the TPS2090DR generates gate-drive voltage above the source potential to fully enhance the N-channel MOSFETs, enabling operation down to 2.7 V input. It requires no external capacitors or components - all timing and regulation are handled internally. This eliminates board space and simplifies design versus discrete high-side switch implementations.

Can the TPS2090DR be used in hot-swap applications, and what features support this use case?

Yes, the TPS2090DR is explicitly designed for hot-swap applications. Key supporting features include 2.5-ms controlled rise time to limit inrush dv/dt, undervoltage lockout (~2 V threshold) to ensure OFF-state during insertion/removal, internal overcurrent transient filtering to suppress false trips from capacitive charging, and automatic thermal recovery to maintain uptime during intermittent faults.