Texas Instruments TPS2012PWR

Overview

TPS2012PWR from Texas Instruments is a high-side N-channel MOSFET power-distribution switch in TSSOP-14 package, featuring 95-mΩ max on-resistance at 5.5 V, 2-A typical short-circuit current limit, logic-compatible enable input, and integrated thermal/short-circuit protection. It operates from 2.7 V to 5.5 V and is used in USB peripheral power management, hot-swap circuits, and portable electronics with heavy capacitive loads.

For engineers reviewing the TPS2012PWR datasheet, TPS2012PWR pinout, TPS2012PWR application, or TPS2012PWR equivalent, key selection criteria include its 2-A current-limit threshold, controlled 3.5–4 ms rise/fall times for EMI reduction, SOIC-8/TSSOP-14 package compatibility with Littlefoot™ switches (GND-connected), thermal shutdown at ~180°C, and 10-µA standby current under disable condition.

Technical Context

The TPS2012PWR implements a charge-pump–driven gate control architecture that enables full enhancement of the N-channel MOSFET down to 2.7 V input, eliminating need for external components. Its internal current-sense FET triggers constant-current limiting during overloads, while thermal sensing circuitry cycles the output off/on when junction temperature reaches ~180°C with ~20°C hysteresis.

Unlike discrete PMOS solutions, this device integrates driver, charge pump, current sense, and thermal protection in a single monolithic IC. The enable input is TTL/CMOS compatible, and output voltage slew rates are intentionally limited to 2–4 ms to suppress inrush current and EMI-critical for USB-compliant port power switching and battery-powered systems.

Key Specifications

Pinout & Package

TPS2012PWR uses a 14-pin thin-shrink small-outline (TSSOP) package with exposed thermal pad (PW package drawing). Pin assignments are validated per TI SLVS097A datasheet Figure 1 (PW top view).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2012PWR, TPS2012DR offers identical functionality in smaller SOIC-8 footprint with better thermal performance but reduced output current handling per pin; TPS2051BDBVR trades off thermal safety and current capacity for ultra-compact size and lower cost in non-fault-critical roles.

Availability

TPS2012PWR is available at Aetrix Electronics and suitable for USB power delivery, hot-swap board insertion, and portable load management requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for TPS2012PWR 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 leader specializing in analog, embedded processing, and power management ICs with decades of automotive, industrial, and consumer design expertise.

The TPS201x family was designed specifically for robust power distribution in systems prone to heavy capacitive loads and short circuits-targeting USB, docking stations, and modular electronics where reliability under fault conditions is critical.

FAQ

What is the maximum continuous output current rating for TPS2012PWR?

The TPS2012PWR does not specify a maximum continuous output current in absolute terms-it is internally current-limited to 2 A typical at 25°C. Under steady-state load, it delivers up to 1 A continuously (per recommended operating conditions table), with current limiting engaging above that threshold. Actual usable current depends on ambient temperature, PCB copper area, and thermal management; derating is required above 70°C ambient.

Does TPS2012PWR require external components for basic operation?

No, the TPS2012PWR requires no external components for core functionality: its internal 100-kHz charge pump, driver, current-sense FET, and thermal protection operate autonomously. A 0.1-µF ceramic bypass capacitor between IN and GND is recommended for stability, and an additional 0.1-µF capacitor at OUT improves ESD immunity-but neither is mandatory for enable/disable or current-limit operation.

How does the enable input (EN) behave electrically on TPS2012PWR?

The EN pin on TPS2012PWR is active-low: a logic low (≤0.4 V at 2.7 V input, ≤0.8 V at ≥4.5 V input) turns the power switch ON; a logic high (≥2 V) disables the switch and reduces supply current to ≤10 µA. Input current is ±0.5 µA, making it compatible with open-drain or push-pull microcontroller outputs without level shifting.

Can TPS2012PWR be used in place of a PMOS high-side switch like the SiP32411?

Yes-TPS2012PWR is explicitly designed as a drop-in replacement for Siliconix Littlefoot™ PMOS switches (e.g., SiP32411) when GND is connected, offering superior R_ON (95 mΩ vs. ~150 mΩ), lower quiescent current, and integrated thermal protection. However, pin count differs (14 vs. 8), so layout adaptation is needed despite functional equivalence.

What happens during a sustained short circuit on the TPS2012PWR output?

During a sustained short, TPS2012PWR first enters constant-current mode at ~2 A, causing voltage across the switch to rise and power dissipation to increase. If junction temperature reaches ~180°C, thermal protection shuts off the output. After cooling ~20°C, it automatically recycles ON-cycling continues until the fault is removed. This prevents permanent damage while maintaining visibility of the fault condition.