Texas Instruments TPS2115ADRBR

Overview

TPS2115ADRBR from Texas Instruments is a dual-input, single-output high-side power multiplexer IC with two N-channel MOSFET switches, 84 mΩ typical r_DS(on), adjustable current limit (0.63–2 A), reverse/cross-conduction blocking, and auto/manual switching modes. It operates from 2.8 V to 5.5 V and delivers up to 2.5 A continuous output at T_J ≤ 105°C in portable battery-powered systems requiring seamless supply switchover.

For engineers reviewing the TPS2115ADRBR datasheet, TPS2115ADRBR pinout, TPS2115ADRBR application, or TPS2115ADRBR equivalent, key selection criteria include its SON-8 package thermal performance, ILIM resistor-based current limit tuning, STAT output for switch status monitoring, and compatibility with TTL/CMOS control logic in dual-supply embedded designs.

Technical Context

The TPS2115ADRBR implements an auto-switching mode where OUT connects to the higher of IN1 or IN2, and a manual mode controlled by D0/D1 logic inputs. Its internal charge pump enables gate drive above input voltage, ensuring full enhancement of both N-channel FETs across the 2.8–5.5 V range.

It features integrated UVLO on both inputs (1.25 V falling edge) and internal VDD (2.53 V falling edge), thermal shutdown at 135°C with 10°C hysteresis, and cross-conduction blocking that prevents simultaneous conduction via real-time gate-source voltage monitoring of each FET.

Key Specifications

Pinout & Package

TPS2115ADRBR uses an 8-pin SON (DRB) package with exposed thermal pad (PAD) tied to GND. The package measures 3.0 mm × 3.0 mm × 0.9 mm and is RoHS-compliant with NIPDAU finish and MSL Level-2 rating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power multiplexer applications.

Compared with TPS2115APWR and TPS2113ADRBR, the TPS2115ADRBR uniquely combines SON-8 thermal efficiency (2.5 A @ T_J ≤ 105°C), full current limit adjustability, and STAT status reporting - making it optimal for space-constrained, high-reliability dual-supply systems demanding field-configurable protection.

Availability

TPS2115ADRBR is available at Aetrix Electronics and suitable for portable computing, digital imaging, mobile communications, and consumer audio applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for TPS2115ADRBR 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 specializing in analog and embedded processing technologies, with leadership in power management ICs for portable and industrial applications.

The TPS211xA family was designed specifically for seamless dual-supply power multiplexing in battery-backed portable electronics, emphasizing low r_DS(on), reverse-blocking, and thermal robustness in miniature packages.

FAQ

What is the maximum continuous output current supported by the TPS2115ADRBR?

The TPS2115ADRBR supports 2.5 A continuous output current when junction temperature is maintained at or below 105°C. This rating is enabled by its SON-8 package with exposed thermal pad and 25.0 mW/°C derating factor - delivering 2.50 W power dissipation capability at 25°C ambient. At 85°C ambient, the rated current reduces to 1.0 A per the package dissipation table.

How does the TPS2115ADRBR prevent reverse current flow during supply switchover?

The TPS2115ADRBR prevents reverse conduction by enforcing a minimum input-to-output voltage difference of 100 mV before enabling either FET. When transitioning from a higher- to lower-voltage supply, the device holds the output Hi-Z until the load capacitor discharges to within 100 mV of the target supply voltage - eliminating backfeed into the weaker source. This behavior is inherent to the internal comparator circuitry and requires no external components.

Can the TPS2115ADRBR operate with input voltages below 2.8 V?

The TPS2115ADRBR can switch a voltage as low as 1.5 V on one input, provided the other input remains ≥2.8 V to power the internal charge pump and logic. However, the absolute minimum operating condition requires at least one input to be ≥2.8 V; both inputs below 2.8 V will cause UVLO activation and force OUT into Hi-Z state. This behavior is explicitly documented in the Electrical Characteristics footnote.

What is the function of the STAT pin on the TPS2115ADRBR?

STAT is an open-drain output that signals the active power source: it pulls low when IN1 is selected or when OUT is Hi-Z (e.g., both inputs disabled), and remains high-impedance only when IN2 is actively supplying power. This allows host microcontrollers to monitor supply selection state in real time without additional sensing circuitry - a key diagnostic feature absent in fixed-function alternatives like the TPS2113ADRBR.

How is current limiting configured on the TPS2115ADRBR?

Current limiting on the TPS2115ADRBR is configured by connecting a resistor R_ILIM between the ILIM pin and GND. The resulting current limit is calculated as I_LIM = 500 / R_ILIM (in ohms), yielding a tunable range from 0.63 A (R = 794 Ω) to 2 A (R = 250 Ω). The resistor value directly sets the trip point with ±20% accuracy across temperature, and zero resistance disables current limiting - a configuration not recommended per datasheet guidance.