Texas Instruments TPD3S044DBVR

Overview

TPD3S044DBVR from Texas Instruments is a USB 3.0 host-port protection IC integrating a 1.5-A current-limited load switch and dual-channel IEC 61000-4-2 ±12-kV contact / ±15-kV air-gap ESD protection diode array for D+ and D− lines. It features 74 mΩ typical R_DS(on), 2.15-A typical current limit, 2-µs short-circuit response, and reverse-current blocking - deployed in laptop USB ports and set-top box power rails.

For engineers reviewing the TPD3S044DBVR datasheet, TPD3S044DBVR pinout, TPD3S044DBVR application, or TPD3S044DBVR equivalent, key selection criteria include continuous 1.5-A output rating, integrated output discharge (456 Ω typ), undervoltage lockout (3.77 V), thermal shutdown (135 °C), and SOT-23-6 (DBV) package compatibility with high-density USB interface layouts.

Technical Context

The TPD3S044DBVR implements an N-channel MOSFET-based load switch with internal charge pump for gate drive, enabling low R_DS(on) while maintaining 5-V rail regulation under heavy capacitive loads. Its current-limit architecture delivers flat-profile limiting (no peaking) at 2.15 A typ, with thermal auto-restart after junction temperature exceeds 135 °C.

ESD protection uses bidirectional TVS diodes on D1/D2 pins rated per IEC 61000-4-2 Level 4, featuring 0.95-V forward voltage, 6-V breakdown, and ultra-low 1.4-pF capacitance to D_GND - preserving USB 3.0 signal integrity without degrading eye diagram margins.

Key Specifications

Pinout & Package

SOT-23-6 (DBV) package: 2.90 mm × 2.80 mm × 1.45 mm body, surface-mount, lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB host-port protection applications.

Compared with TPD3S044DBVR, TPD3S014DBVR offers lower current handling but identical protection architecture and pinout, while TPD4E05U06DQAR provides superior capacitance performance at the expense of requiring a discrete power switch - making TPD3S044DBVR optimal for integrated, space-constrained USB 3.0 host designs.

Availability

TPD3S044DBVR is available at Aetrix Electronics and suitable for laptop USB interfaces, set-top box power distribution, and industrial point-of-sale terminals requiring stable component supply and long-term production continuity.

Supply support for TPD3S044DBVR 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, efficiency, and system-level integration.

The TPD3S0x4 product line was designed specifically for USB host-port protection - combining load switching, ESD suppression, and fault management in one compact package for consumer and industrial USB 2.0/3.0 endpoints.

FAQ

What is the maximum continuous output current supported by the TPD3S044DBVR?

The TPD3S044DBVR supports a maximum continuous output current of 1.5 A. This rating is validated across the –40°C to 85°C ambient temperature range and enables robust operation in USB host ports powering high-current peripherals such as external SSDs or USB-powered hubs. The device enters constant-current limiting at 2.15 A (typical) during overload conditions.

Does the TPD3S044DBVR require an external capacitor on the IN pin?

Yes, the TPD3S044DBVR requires a minimum 0.1-µF ceramic capacitor connected between IN and GND, placed as close as possible to the device. This capacitor stabilizes the input supply during fast load transients and suppresses noise coupling into the internal charge pump. Larger values (up to 22 µF) are recommended in systems with long input traces or high inductance to limit voltage overshoot.

How does the TPD3S044DBVR handle reverse current flow when disabled?

The TPD3S044DBVR blocks reverse current from OUT to IN when disabled or in UVLO state, thanks to its N-channel MOSFET architecture and integrated body-diode control. This prevents backfeeding into upstream power sources - a critical feature in multi-port USB hubs where VBUS lines may share a common rail. Reverse leakage remains below 1 µA at 5.5 V and 125°C.

What ESD protection levels does the TPD3S044DBVR provide on D+ and D− lines?

The TPD3S044DBVR provides IEC 61000-4-2 Level 4 ESD protection on D1 and D2 pins: ±12-kV contact discharge and ±15-kV air-gap discharge. These ratings were verified on PCBs with standard 0.1-µF and 120-µF bypass capacitors. The diodes exhibit 0.95-V forward voltage and 6-V breakdown, ensuring clamping occurs before damage to downstream PHY circuitry.

Can the TPD3S044DBVR be used in USB 3.0 SuperSpeed applications without signal degradation?

Yes, the TPD3S044DBVR is qualified for USB 3.0 applications due to its ultra-low 1.4-pF capacitance from D1/D2 to GND and 0.02-pF differential capacitance - both measured at 1 MHz and 2.5 V bias. These values minimize insertion loss and maintain signal integrity across the 2.5–5 GHz SuperSpeed bandwidth, as confirmed in TI's USB 3.0 compliance test reports for the TPD3S0x4 family.