Texas Instruments TPS2090D

Overview

TPS2090D 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, 2.7–5.5 V operating range, and integrated thermal/short-circuit protection with open-drain overcurrent outputs. It enables controlled hot-plug insertion in USB peripherals and embedded peripheral modules.

For engineers reviewing the TPS2090D datasheet, TPS2090D pinout, TPS2090D application, or TPS2090D equivalent, key selection criteria include per-channel enable polarity (EN1/EN2 both active-high for TPS2090D), SOIC-8 package constraints, 2.5-ms typical rise time, and bidirectional switching capability under load conditions.

Technical Context

The TPS2090D integrates an internal charge pump to drive N-channel MOSFET gates above source potential, enabling full enhancement from 2.7 V input without external components. Each channel operates independently with CMOS/TTL-compatible enable inputs and dedicated overcurrent logic output (OC).

It implements dual thermal trip points (140°C primary, 160°C secondary) for fault isolation: only the overloaded channel shuts down unless junction temperature exceeds 160°C, at which point both channels disable. Undervoltage lockout (UVLO) activates below ~2 V to prevent erratic turn-on during brownout or hot-removal events.

Key Specifications

Pinout & Package

TPS2090D is housed in an 8-pin SOIC (D) package with standard 1.27 mm pitch, RoHS-compliant NiPdAu lead finish, and MSL Level-1 rating. Thermal resistance θJA = 172°C/W enables operation up to 85°C ambient with appropriate PCB copper area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2051BDR and AP2152MPG-13, the TPS2090D uniquely combines dual active-high enables, integrated OC reporting, and 250 mA per channel in SOIC-8 - making it optimal for space-constrained, fault-aware USB and industrial peripheral designs requiring minimal external components.

Availability

TPS2090D is available at Aetrix Electronics and suitable for USB peripheral management, industrial sensor node power control, and embedded display backlight sequencing requiring stable component supply and long-term industrial lifecycle support.

Supply support for TPS2090D 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, designing and manufacturing analog, embedded processing, and connectivity products for industrial, automotive, and consumer markets.

The TPS209x family was developed specifically for robust hot-plug power distribution in USB, docking stations, and modular industrial equipment - emphasizing fault resilience, low quiescent current, and simplified system-level protection.

FAQ

What is the maximum continuous current per channel for the TPS2090D?

The TPS2090D supports 250 mA continuous current per channel under recommended operating conditions (VI(IN) = 2.7–5.5 V, TA ≤ 85°C). This rating is maintained across the full ambient temperature range and accounts for internal thermal derating - exceeding this value risks triggering current-limit mode or thermal shutdown. The device is designed to sustain this current without external heatsinking in standard SOIC-8 layouts with adequate PCB copper.

Does the TPS2090D support bidirectional current flow, and under what conditions?

Yes, the TPS2090D supports bidirectional current flow from OUT to IN when the output voltage exceeds the input voltage and the MOSFET body diode is forward-biased - but only during transient conditions and with current limited by rDS(on). This behavior is explicitly documented in TI's datasheet as "bidirectional switch" capability and is usable in controlled scenarios like USB OTG back-powering or diagnostic current injection, provided external circuitry prevents latch-up or uncontrolled reverse conduction.

How does the OC pin on the TPS2090D behave during overcurrent and thermal events?

The OC pin on the TPS2090D is an open-drain output that pulls low during either overcurrent (e.g., short circuit or >500 mA peak) or thermal overload (junction ≥140°C). It remains asserted until the fault condition is removed and the device recovers - for thermal events, this requires cooling by ~20°C before automatic restart. The OC signal is shared across both channels, so it indicates fault on either switch but does not identify which one.

What is the enable input configuration for the TPS2090D, and how does it differ from other TPS209x variants?

The TPS2090D has both EN1 and EN2 configured as active-high inputs - a defining characteristic confirmed in the "AVAILABLE OPTIONS" table. This differs from TPS2091D (EN1 active-high, EN2 active-low) and TPS2092D (both active-low), making the TPS2090D the only variant in the D-package dual series with fully active-high enable logic, simplifying direct interfacing with most microcontroller GPIOs without inversion.

Can the TPS2090D be used with a 3.3 V input supply, and what impact does that have on performance?

Yes, the TPS2090D operates across 2.7–5.5 V, including 3.3 V nominal supplies. At 3.3 V, rDS(on) increases to 125 mΩ (typical, 25°C) versus 80 mΩ at 5 V - raising conduction loss by ~56% and requiring careful thermal design at full 250 mA load. Rise time extends to ~3 ms, and UVLO threshold remains fixed at ~2 V, ensuring reliable disable behavior even with 3.3 V rail droop.