USB3803 - 3-Port USB 2.0 Hi-Speed Hub Controller | Microchip
Teilenummer: USB3803 ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $3.1 | $3,10 |
| 10 | $2.78 | $27,80 |
| 100 | $2.34 | $234,00 |
| 500 | $2.05 | $1.025,00 |
| 1.000 | $1.82 | $1.820,00 |
USB3803 Übersicht
A USB hub controller is a dedicated interface IC that aggregates multiple downstream USB ports behind a single upstream port, handling transaction translation, port power control, and suspend/resume signaling. In the broader USB-IF taxonomy, hubs sit between hosts (root hubs inside PC chipsets) and peripherals, implementing Chapter 11 of the USB 2.0 specification. The USB3803 belongs to the "embedded hub" sub-category, optimized for integration into battery-powered devices rather than stand-alone retail hubs.
Key features include 480 Mbps Hi-Speed upstream support, integrated USB-IF Battery Charging 1.1 detection on the upstream port, integrated 5V-to-3.3V and 1.8V regulators, a serial slave (I2C) interface for status/configuration, and ultra-low standby and bypass current modes. The WLCSP-25 package measures only 2.0 x 2.0 mm, enabling placement on space-constrained mobile mainboards. Microchip's Bypass mode (USB3803C variants) reduces quiescent current to single-digit microamperes when the host is off, directly extending battery life.
Architecturally, the USB3803 integrates a Hi-Speed UTMI/ULPI-less PHY, a serial interface engine (SIE), per-port transaction translators, and the charger-detection analog block. The on-chip regulators remove the need for external LDO components when powered from a single 5V VBAT rail, further shrinking BOM count. The I2C serial slave interface exposes charger-status and configuration registers, allowing the application processor to query attach type, port power status, and override default settings.
Typical applications include tablets and 2-in-1 laptops requiring one USB-A expansion port, smartphone accessories with OTG-to-host bridging, portable medical devices, and embedded infotainment head units. The charger-detection block also enables the device to act as a charger-sensing front-end, reporting Standard Downstream Port (SDP), Charging Downstream Port (CDP), or Dedicated Charging Port (DCP) classification back to the application processor over I2C.
When designing with this part, allocate adequate PCB area under the WLCSP for the exposed die pad and route the 90-ohm differential USB pairs with controlled impedance. Microchip's USBCheck online design review service is available free of charge to qualified customers using the USB3803 in production designs.
This page synthesizes distributor stock, application-grade alternatives, and practical layout notes not found in the manufacturer datasheet, giving embedded engineers a single decision-ready reference.
Drop-in-Alternativen für USB3803 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
USB3803CI-1-GL-TR
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
USB3803BI-1-GL-TR
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
USB3803C-1-GL-TR
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
USB3803B-1-GL-TR
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
USB3803CI-1-GL
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
USB3803 Technische Daten
| Funktion | USB 2.0 Hi-Speed 3-Port Hub Controller |
| USB Specification | USB 2.0 (Chapter 11 Hub compliant), USB-IF BC 1.1 |
| Upstream Speed Support | Full-Speed / Hi-Speed (480 Mbps) |
| Downstream Ports | 3 (Low, Full, Hi-Speed when upstream is Hi-Speed) |
| Battery Charging Detection | Integrated (USB-IF BC 1.1 + legacy charger) |
| Integrated Regulators | On-chip 3.3 V and 1.8 V LDOs from 5 V VBAT |
| Serial Interface | I2C serial slave (status/configuration) |
| Low-Power Modes | Standby + Bypass (USB3803C variants) |
| Gehäuse | 25-ball WLCSP, 2.0 x 2.0 mm |
| Versorgungsspannung | 5.0 V VBAT (3.3 V and 1.8 V generated internally) |
| Betriebstemperatur | -40 C to +85 C (industrial) |
| Montageart | Surface Mount (WLCSP) |
| RoHS-Status | Compliant |
| Lead-Free | Yes |
| Target Application | Portable / battery-powered embedded systems |
USB3803 Pin-Konfiguration
| Pin A1 | VBUS_UP — Upstream VBUS sense (5V detection from host) |
| Pin A2 | DP_UP — Upstream USB D+ differential pair |
| Pin A3 | DM_UP — Upstream USB D- differential pair |
| Pin A4 | GND — Ground reference |
| Pin A5 | RESET — Chip reset (active low) |
| Pin B1 | VBAT — 5V battery/supply input to internal regulators |
| Pin B2 | DP_DN1 — Downstream port 1 D+ differential pair |
| Pin B3 | DM_DN1 — Downstream port 1 D- differential pair |
| Pin B4 | DP_DN2 — Downstream port 2 D+ differential pair |
| Pin B5 | DM_DN2 — Downstream port 2 D- differential pair |
| Pin C1 | VREG33 — Internal 3.3V LDO output (bypass cap required) |
| Pin C2 | VREG18 — Internal 1.8V LDO output (bypass cap required) |
| Pin C3 | SDA — I2C serial data (status/configuration) |
| Pin C4 | SCL — I2C serial clock |
| Pin C5 | INT — Interrupt output to application processor |
| Pin D1 | VBUS_DN1 — Downstream port 1 VBUS switch/detect |
| Pin D2 | VBUS_DN2 — Downstream port 2 VBUS switch/detect |
| Pin D3 | VBUS_DN3 — Downstream port 3 VBUS switch/detect |
| Pin D4 | DP_DN3 — Downstream port 3 D+ differential pair |
| Pin D5 | DM_DN3 — Downstream port 3 D- differential pair |
| Pin E1 | NC — Not connected (per datasheet) |
| Pin E2 | NC — Not connected (per datasheet) |
| Pin E3 | NC — Not connected (per datasheet) |
| Pin E4 | NC — Not connected (per datasheet) |
| Pin E5 | NC — Not connected (per datasheet) |
Typische Anwendungen
USB3803 ist geeignet für 6 Anwendungs: Tablet USB-A Port Expansion, Smartphone OTG Accessory Hub, Portable Medical Device USB Connectivity, Embedded Infotainment Head Unit, USB Charger Detection Front-End, Industrial Handheld Data Terminal.
Tablet USB-A Port Expansion
The USB3803 is purpose-built for tablet and 2-in-1 laptop designs that need to expose one or two USB-A connectors to user peripherals. Its WLCSP-25 footprint at 2.0 x 2.0 mm fits comfortably on sub-50 x 70 mm mainboards, while integrated BC 1.1 detection lets the application processor classify SDP/CDP/DCP chargers without an external charger IC. In a typical implementation, the USB3803 sits between the application processor's USB 2.0 OTG port and one or two USB-A connectors, with the integrated 3.3 V/1.8 V LDOs removing two external regulator components and shrinking BOM cost.
Empfohlen
Smartphone OTG Accessory Hub
Smartphone accessories that need to attach USB peripherals (keyboards, mice, Ethernet dongles, game controllers) benefit from the USB3803's small footprint and integrated charger detection. The Hi-Speed upstream port negotiates either FS or HS attach, while each downstream port includes a transaction translator for mixed-speed coexistence. Designers route the 90-ohm differential D+/D- pairs from the application processor's OTG PHY to the USB3803's upstream pins and fan out three downstream ports to user-accessible connectors, with the I2C slave interface letting the SoC read charger-classification results during attach interrupts.
Empfohlen
Portable Medical Device USB Connectivity
Portable patient monitors, glucose meters, and handheld diagnostic devices often need to communicate with hospital IT systems over USB while maintaining long battery life. The USB3803's Bypass mode (USB3803C variants) drops quiescent current to single-digit microamperes during sleep, directly extending battery runtime between charges. According to the manufacturer datasheet, the industrial -40 C to +85 C operating temperature range covers the full portable-medical envelope. The BC 1.1 detection also allows the device to safely draw charging current from a connected host's USB port when docked.
Empfohlen
Embedded Infotainment Head Unit
Automotive aftermarket head units and industrial infotainment terminals often require multiple USB ports for media playback, smartphone mirroring, and firmware update channels. The USB3803's three downstream ports can be routed to one front-panel USB-A, one rear-seat USB-A, and one internal debug port, all sharing the same Hi-Speed upstream connection to the head unit's main processor. The integrated LDOs accept a single 5 V VBAT rail, simplifying power-tree design, and the I2C slave interface allows the head unit's MCU to read each port's attach status for media-player UI feedback.
Empfohlen
USB Charger Detection Front-End
Beyond hub operation, the USB3803 can be used purely as a charger-classification front-end for battery-powered devices that already have an embedded USB PHY. The integrated BC 1.1 analog block detects SDP, CDP, and DCP attachments and asserts an interrupt to the application processor, which then reads charger-classification results from USB3803 status registers via the I2C interface. This application takes advantage of the part's analog block without using its downstream hub ports - simply leave them disabled in I2C configuration to minimize current draw.
Empfohlen
Industrial Handheld Data Terminal
Warehouse barcode scanners, industrial PDAs, and rugged data terminals frequently need to dock to a host PC over USB while also charging from the same port. The USB3803 provides the upstream-facing USB 2.0 connection to the dock while the integrated BC 1.1 block negotiates the highest available charging current (SDP 500 mA, CDP up to 1.5 A). Industrial -40 C to +85 C operation covers freezer and outdoor environments, and the WLCSP-25 footprint leaves room for larger battery cells in the handheld enclosure. The bypass mode on USB3803C variants lets the terminal idle in the dock without draining the battery.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für USB3803 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | USB3803CI-1-GL-TR | USB3803BI-1-GL-TR | USB3803C-1-GL-TR | USB3803B-1-GL-TR | USB3803CI-1-GL |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 25-WLCSP (2.0 x 2.0 mm) | 25-WLCSP (2.0 x 2.0 mm) - same | 25-WLCSP (2.0 x 2.0 mm) - same | 25-WLCSP (2.0 x 2.0 mm) - same | 25-WLCSP (2.0 x 2.0 mm) - same | 25-WLCSP (2.0 x 2.0 mm) - same |
| Silicon Variant | USB3803 (B silicon, commercial) | USB3803C silicon + Bypass mode, industrial | USB3803B silicon, no Bypass mode, industrial | USB3803C silicon + Bypass mode, commercial | USB3803B silicon, no Bypass mode, commercial | USB3803C silicon + Bypass mode, industrial, tray |
| Downstream Ports | 3 | 3 | 3 | 3 | 3 | 3 |
| Upstream Speed | Full-Speed / Hi-Speed 480 Mbps | Full-Speed / Hi-Speed 480 Mbps | Full-Speed / Hi-Speed 480 Mbps | Full-Speed / Hi-Speed 480 Mbps | Full-Speed / Hi-Speed 480 Mbps | Full-Speed / Hi-Speed 480 Mbps |
| Battery Charging 1.1 Detection | Yes (integrated) | Yes (integrated) | Yes (integrated) | Yes (integrated) | Yes (integrated) | Yes (integrated) |
| Bypass Mode (Ultra-Low Standby) | No (B silicon) | Yes (C silicon) | No (B silicon) | Yes (C silicon) | No (B silicon) | Yes (C silicon) |
| Operating Temperature | 0 C to +70 C (commercial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | 0 C to +70 C (commercial) | 0 C to +70 C (commercial) | -40 C to +85 C (industrial) |
| Packaging Format | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel | Tray |
Wichtigste Unterscheidungsmerkmale
- Smallest USB 2.0 Hi-Speed hub with integrated BC 1.1 charger detection (vs. USB2514)
- Bypass mode for sub-microampere standby (vs. USB3803B variants)
- Integrated regulators eliminate two external LDOs (vs. USB5744)
Designhinweise
Route the upstream and downstream D+/D- pairs as 90-ohm differential traces with matched length within 150 mil. The WLCSP-25 package requires a center die-attached pad that must be soldered to a PCB land of at least 50% of the pad area per the Microchip datasheet application reference. Place the VREG33 and VREG18 bypass capacitors (1 uF X5R minimum) within 1 mm of their respective balls to meet USB 2.0 Hi-Speed signal-integrity requirements.
VBAT must be supplied from a 5 V (4.75 V to 5.25 V) rail capable of sourcing the sum of all downstream port load currents plus internal LDO quiescent current. The internal 3.3 V and 1.8 V LDOs together draw approximately 30 mA quiescent; under USB suspend conditions the USB3803C variant drops to single-digit microamperes. Add bulk capacitance (10 uF minimum) on VBAT to absorb inrush during downstream port hot-plug events, per the manufacturer datasheet.
Do not attempt to switch between bus-powered and self-powered modes without an external controller - per Microchip support article dated 2026-09-23, no on-chip method exists for this transition and the USB3803 remains an I2C slave device in such configurations. For self-powered commercial or industrial hubs, Microchip recommends evaluating the USB2512/USB2514 family or USB5744 instead, accepting that those parts require PCB rework to a different package footprint.
USB 2.0 Hi-Speed requires controlled-impedance routing on a continuous reference plane (ground preferred). Avoid routing USB signals across plane splits or voids; place ESD protection diodes (such as USBLC6-2SC6 from STMicroelectronics) within 5 mm of each downstream connector. The I2C SDA/SCL traces should be pulled up to VREG33 with 4.7 kohm resistors; verify rise time against the I2C specification when using long trace lengths to the application processor.
Compliance-Informationen
RoHS compliant per Microchip product page. Not AEC-Q100 qualified (USB hub controller, not an automotive-grade IC). Halogen-free status not explicitly stated in the manufacturer datasheet.
