Texas Instruments TPS2068DGN

Overview

TPS2068DGN from Texas Instruments is a single-channel, current-limited, high-side power-distribution switch featuring a 70-mΩ N-channel MOSFET, 1.5-A continuous output current, 2.7 V to 5.5 V input voltage range, active-low enable, and thermal/short-circuit protection. It serves as a robust hot-swap controller for USB host ports and industrial peripheral modules requiring controlled inrush current and fault reporting.

For engineers reviewing the TPS2068DGN datasheet, TPS2068DGN pinout, TPS2068DGN application, or TPS2068DGN equivalent, key selection criteria include its –40°C to 85°C operating temperature range (DGN package), deglitched open-drain OC output, reverse current blocking, <1-μA standby supply current, and UL/CB-certified safety compliance.

Technical Context

The TPS2068DGN integrates an internal charge pump to drive the high-side N-channel MOSFET gate across the full 2.7–5.5 V input range, enabling precise control of rise/fall times (0.6-ms typical rise time) without external components. Its current-limit circuit operates with a 1.6 A min / 2.6 A max threshold and enters constant-current mode during overload, while thermal shutdown activates at ~135°C with 10°C hysteresis.

It features undervoltage lockout (UVLO) with 2.0–2.5 V turn-on threshold and 75 mV hysteresis, ensuring reliable power-up sequencing. The OC pin provides deglitched (4–15 ms timeout), open-drain fault reporting-asserted low on overcurrent or thermal events-and remains inactive during power-up transients.

Key Specifications

Pinout & Package

TPS2068DGN uses an 8-pin MSOP (DGN) package with exposed PowerPad thermally connected to GND. Pin 1 is GND; Pin 2 and 3 are IN (dual-input configuration for enhanced current handling); Pin 4 is EN (active-low enable); Pin 5 is OC (open-drain fault output); Pins 6–8 are paralleled OUT terminals (single-switch output path).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2069DGN, TPS2068DGN offers identical protection and thermal performance but requires active-low enable signaling; compared with TPS2051BDGN, it delivers 3× higher current, half the on-resistance, and certified safety compliance-making it suitable for industrial and USB host applications where reliability and regulation matter.

Availability

TPS2068DGN is available at Aetrix Electronics and suitable for USB host protection, industrial hot-swap modules, and embedded peripheral power control requiring stable component supply, long-term lifecycle support, and certified safety compliance.

Supply support for TPS2068DGN 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 expertise in high-reliability power distribution solutions.

The TPS206x family was designed specifically for USB-compliant and industrial hot-plug power switching-emphasizing current limiting, fault reporting, thermal resilience, and safety certification in compact surface-mount packages.

FAQ

What is the maximum continuous output current supported by the TPS2068DGN?

The TPS2068DGN supports 1.5 A continuous output current at ambient temperatures up to 70°C. With proper PCB thermal design (PowerPad connected to GND plane), it maintains this rating up to 85°C ambient. At higher junction temperatures, current must be derated per the Dissipation Rating Table-e.g., 600 mW at 70°C ambient for the DGN package. The device enters constant-current limiting above ~2.1 A, protecting both itself and the load.

Does the TPS2068DGN require external components for basic operation?

No, the TPS2068DGN requires no external components for core functionality: its internal charge pump eliminates the need for boost capacitors, and the deglitched OC output needs only a pull-up resistor for MCU interfacing. A 0.1-μF ceramic capacitor between IN and GND is recommended for stability, and output bulk capacitance (e.g., 22 μF) is advised for heavy loads-but neither is mandatory for turn-on. The PowerPad must be soldered to GND for thermal and safety compliance.

How does the TPS2068DGN handle short-circuit faults?

Upon detecting an output short, the TPS2068DGN immediately enters constant-current mode at ~2.1 A (typical), limiting power dissipation. If the fault persists, junction temperature rises until thermal shutdown triggers at ~135°C, turning off the switch. After cooling by ~10°C, it auto-recovers. Concurrently, the OC pin pulls low after a 4–15 ms deglitch window-ensuring no false trips during inrush. This dual-layer protection preserves both IC and system integrity.

Is the TPS2068DGN compatible with USB 2.0 host port requirements?

Yes, the TPS2068DGN meets all critical USB 2.0 host port power requirements: it provides 1.5-A current capability (exceeding the 500-mA per-port spec), controlled rise time (<1 ms) to limit inrush, deglitched OC reporting for USB controller fault handling, and UL/CB safety certification. Its –40°C to 85°C rating and reverse current blocking further align with industrial USB host designs beyond consumer-grade implementations.

What is the purpose of the dual IN pins (2 and 3) and triple OUT pins (6, 7, 8) on the TPS2068DGN?

The dual IN pins reduce series resistance and inductance from the input source to the internal MOSFET source terminal, improving current sharing and thermal distribution. The triple OUT pins similarly lower bond-wire resistance and parasitic inductance from the MOSFET drain to the load-collectively enabling robust 1.5-A continuous operation in the small MSOP-8 package while minimizing voltage drop and EMI. This layout is specific to the TPS2068/69 and differs from the dual-channel TPS2060/64 pinout.