Texas Instruments TPS2075DBG4

Overview

TPS2075DBG4 from Texas Instruments is a four-port USB hub power controller integrating independent high-side N-channel MOSFET power switches (100 mA bus-powered / 500 mA self-powered per port), a 3.3-V/100-mA LDO regulator, and DP0_RST hub reset signaling. It supports USB 1.1/2.0 compliance, automatic SP-to-BP switchover, and operates across 4.5–5.5 V input with –40°C to 85°C ambient range in a 24-pin SSOP package.

For engineers reviewing the TPS2075DBG4 datasheet, TPS2075DBG4 pinout, TPS2075DBG4 application, or TPS2075DBG4 equivalent, key selection criteria include BPMODE logic polarity (active-high for TPS2075), independent thermal/short-circuit protection per port, PG_DLY-adjustable power-good timing, OCx overcurrent flag outputs, and dual-supply operation with BP_DIS-controlled autoswitch disable.

Technical Context

The TPS2075DBG4 implements two independent power-switch domains: bus-powered (BP→OUTx, r_DS(on) = 500 mΩ typ.) and self-powered (SP→OUTx, r_DS(on) = 100 mΩ typ.), each with dedicated undervoltage lockout (BP start threshold = 4.25 V, SP start = 4.5 V) and thermal shutdown (140°C first trip). Its control logic uses active-low EN1–EN4 enables and active-high BP_DIS to gate autoswitching between supply modes.

It integrates a 3.3-V LDO (3.2–3.4 V output, 100 mA max, 0.6 V dropout) with PG and PG_DLY pins enabling programmable delay (via external capacitor) for synchronized hub reset (DP0_RST) and power-good assertion. BPMODE output signals bus-powered mode with active-high logic-distinct from TPS2074's active-low BPMODE.

Key Specifications

Pinout & Package

TPS2075DBG4 is housed in a 24-pin SSOP (DB) package with 0.64-mm pitch, 8.2-mm × 3.9-mm body, and exposed thermal pad (not electrically connected). Pin 9 (BPMODE) is active-high for bus-powered indication-critical for correct hub controller configuration.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB hub power management applications.

Compared with TPS2074DB, TPS2075DBG4 offers active-high BPMODE for simplified interface; versus TPS2064D, it delivers full four-port control with integrated LDO and hub reset-reducing BOM count and layout complexity in complete USB hub designs.

Availability

TPS2075DBG4 is available at Aetrix Electronics and suitable for USB hub designs, industrial docking stations, and embedded peripheral interfaces requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS2075DBG4 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and system-level integration.

The TPS207x family targets USB-compliant power distribution in hub and peripheral applications, combining high-side switching, regulation, and protocol-aware signaling (DP0_RST, PG) to simplify USB system design.

FAQ

What is the key functional difference between TPS2075DBG4 and TPS2074DB?

The primary functional difference lies in BPMODE logic polarity: TPS2075DBG4 asserts BPMODE high during bus-powered operation, whereas TPS2074DB asserts it low. All other electrical specifications, pinout, package, and feature set-including per-port current limiting, 3.3-V LDO, DP0_RST, and PG_DLY timing-are identical. This distinction mandates firmware or logic-level adaptation when substituting between the two in an existing design.

Does TPS2075DBG4 require external capacitors, and what values are recommended?

Yes, TPS2075DBG4 requires multiple external capacitors: a 0.1-µF ceramic + 10-µF bulk capacitor on BP–AGND; 0.1-µF + 68-µF on SP–AGND; 33-µF (min) on each OUTx–GND; and 4.7–33-µF on 3.3V_OUT–GND with 0.2–10-Ω ESR. The PG_DLY pin needs a timing capacitor (e.g., 0.47 µF for 190-ms delay). These values ensure stable regulation, transient suppression, and compliant USB hub reset timing.

How does the automatic SP-to-BP switchover work in TPS2075DBG4?

When BP_DIS is low and SP voltage exceeds 4.5 V, TPS2075DBG4 operates in self-powered mode. If SP drops below 4.0 V (UVLO stop threshold), it automatically switches to bus-powered mode using BP as the output source. This transition is disabled by pulling BP_DIS high. The BPMODE output updates accordingly, and PG/DP0_RST timing remains synchronized to maintain hub controller compatibility during mode change.

Can TPS2075DBG4 drive USB 2.0 high-speed (480 Mbps) downstream ports directly?

No, TPS2075DBG4 does not interface with USB data lines (D+/D–); it manages only VBUS power delivery to downstream ports. High-speed signal integrity depends on the hub controller IC and PCB layout-not the TPS2075DBG4. Its role is strictly power switching, regulation, and reset signaling (DP0_RST), making it fully compatible with any USB 2.0 hub controller that accepts 3.3-V supply and responds to PG/DP0_RST timing.

What thermal protection mechanisms does TPS2075DBG4 implement per port?

TPS2075DBG4 provides per-port overcurrent protection via internal sense FETs (not resistors), triggering OC1–OC4 low within 1–10 ms. It also features global thermal shutdown with two thresholds: first trip at 140°C (latching off until cooldown), second at 150°C. Hysteresis (15–25°C) prevents oscillation. These protections operate independently of enable states and remain active even when ENx pins are deasserted.