STUSB4500LQTR - USB Type-C Sink Controller, 5V/3A, 24-QFN | STMicroelectronics
MPN: STUSB4500LQTR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.1 | $2.10 |
| 10 | $1.98 | $19.80 |
| 100 | $1.72 | $172.00 |
| 500 | $1.46 | $730.00 |
| 1,000 | $1.21 | $1,210.00 |
STUSB4500LQTR Overview
What is a USB Type-C sink controller? A sink controller is the side of a USB Type-C connection that receives power from a Type-C source (such as a laptop, charger, or power bank). It negotiates the voltage and current level allowed by the attached source using the USB Power Delivery (PD) protocol, then presents that negotiated voltage on its VBUS rail. The STUSB4500L is a "standalone" controller: it requires no external MCU to negotiate a PD contract, which simplifies the BOM and firmware for power-only sink devices such as docking stations, charging cradles, and USB-powered appliances.
Key features include dead-battery support (a system can draw power directly from VBUS before software initializes), 5 V legacy detection, GPIO pin for debug accessory detection, integrated VBUS discharge paths, and I2C programmable source capability (PDOs) such as 5 V @ 3 A, 9 V @ 2 A, 12 V @ 2.25 A, and higher via PD 2.0/3.0 negotiation. The 4x4 mm QFN-EP footprint occupies only ~16 mm^2 of board space, making this part attractive for compact form factors.
Typical applications include USB-PD powered hard-disk enclosures, USB Type-C powered speakers, industrial controllers drawing bus power, smart-home hubs with PD input, notebook replacement chargers, and USB-PD powered LED lighting. Automotive-grade variant is separately available as STUSB4500QTR.
Design consideration: when using STUSB4500LQTR, ensure the CC1/CC2 pins have the correct Rd pull-down resistors and that the VBUS sense network matches your system's sink current limit. Provide adequate copper area beneath the exposed pad for thermal relief under sustained 3 A loads.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. Specifications cross-checked against ST datasheet 2026-10-20.
Drop-in alternatives for STUSB4500LQTR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with STUSB4500LQTR (same form factor and footprint) — differing in Package, USB Standard.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
STUSB4500QTR
✅ Drop-In✓ In Stock
$0.74 / Unit
View Datasheet →STUSB4500LBJR
✅ Drop-In✓ In Stock
$2.2 / Unit
View Datasheet →STUSB4500QTR
✅ Drop-In✓ In Stock
$0.74 / Unit
View Datasheet →STUSB4500LQTR Specifications
| Function | USB Type-C sink port controller (standalone) |
| Interface | USB 2.0 / I2C (control only) |
| USB Standard | USB Type-C; USB PD 2.0/3.0 negotiation |
| Sink Voltage | 5 V (default), up to 20 V via PD |
| Sink Current | Up to 3 A (15 W default, up to 100 W via PD) |
| Supply Voltage Range | 3.0 V to 22 V |
| Supply Current | 210 uA (operating) |
| Operating Temperature | -40C to +105C |
| Package | 24-QFN-EP (4x4 mm) with exposed thermal pad |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
| REACH Status | REACH unaffected |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
| Dead Battery Support | Yes |
| Debug Accessory Detection (DTS) | Yes (GPIO configured) |
STUSB4500LQTR Pin Configuration
| Pin 1 | CC1 — USB Type-C Configuration Channel 1 (with Rp/Rd) |
| Pin 2 | CC2 — USB Type-C Configuration Channel 2 (with Rp/Rd) |
| Pin 3 | VBUS_SENSE — VBUS voltage sensing for negotiation |
| Pin 4 | GND — Ground |
| Pin 5 | GND — Ground (thermal pad reinforcement) |
| Pin 6 | VDD — Internal supply (3.0V to 22V input range) |
| Pin 7 | SDA — I2C data for host control |
| Pin 8 | SCL — I2C clock for host control |
| Pin 9 | GPIO/DEBUG — GPIO / Debug Accessory Mode signaling |
| Pin 10 | RESET_N — Active-low reset |
| Pin 11 | ADDR_SEL — I2C address selection |
| Pin 12 | VBUS_DISCH — VBUS discharge path control |
| Pin 13 | VBUS_SW_OUT — VBUS power switch output to downstream |
| Pin 14 | VSYS — System supply rail (after switch) |
| Pin 15 | GP2 — General purpose IO 2 |
| Pin 16 | GP3 — General purpose IO 3 |
| Pin 17 | NC — Not connected (per datasheet) |
| Pin 18 | NC — Not connected (per datasheet) |
| Pin 19 | NC — Not connected (per datasheet) |
| Pin 20 | NC — Not connected (per datasheet) |
| Pin 21 | NC — Not connected (per datasheet) |
| Pin 22 | NC — Not connected (per datasheet) |
| Pin 23 | GND — Ground |
| Pin 24 | NC — Not connected (per datasheet) |
Typical Applications
STUSB4500LQTR is suitable for 6 applications: USB Type-C Powered Docking Station, USB-PD Powered External SSD Enclosure, Industrial USB Type-C Powered Sensor Module, Smart Home Hub with Type-C Power Input, USB Type-C PD Charging Cradle, Portable USB-PD Powered Audio Amplifier.
USB Type-C Powered Docking Station
The STUSB4500LQTR fits USB Type-C powered docking stations because its standalone Type-C sink controller handles cable attach detection, CC pin orientation, and PDO negotiation without an external MCU. It advertises PDOs up to 20 V / 5 A and uses dead-battery support so the dock can boot before firmware is loaded. Place between the Type-C receptacle and the downstream DC-DC converter with 22 V-tolerant VBUS sense resistors; the embedded policy engine asserts a GPIO when 9 V or higher PDO is accepted, allowing hot-swap of downstream rails.
Recommended
USB-PD Powered External SSD Enclosure
The STUSB4500LQTR is well-suited to USB-PD powered external SSD enclosures because it can request 9 V or 12 V rails directly from a Type-C host port, avoiding the need for a separate barrel jack. Its 210 uA supply current budget keeps standby drain low; required VBUS MOSFET handling is integrated. Pair with a hot-swap controller for inrush protection on the SSD power rail and a step-down regulator for the 3.3 V NAND supply; the STUSB4500LQTR handles attach and PDO request autonomously.
Recommended
Industrial USB Type-C Powered Sensor Module
In industrial sensor modules drawing power via Type-C, the STUSB4500LQTR provides predictable bus power without host-side firmware dependency. Its -40C to +105C operating range covers factory-floor environments, and the small 4x4 mm QFN-EP package suits compact DIN-rail modules. Use the I2C port for diagnostics: the part exposes negotiated voltage, attached source type, and cable current rating on its I2C registers, enabling host firmware to log power quality.
Recommended
Smart Home Hub with Type-C Power Input
Smart home hubs that draw all their power from a Type-C wall adapter benefit from the STUSB4500LQTR's ability to request fixed PDOs across chargers from 5 V/3 A up to 20 V/5 A. This simplifies SKU variants since the hub auto-negotiates with whatever Type-C source the user provides. Configure PDOs for 9 V/2 A as default per the datasheet; downstream buck regulator feeds the SoC and radio rails. CC line filtering must follow ST's layout recommendation (AN5465) to avoid mis-attachment during ESD events.
Recommended
USB Type-C PD Charging Cradle
Charging cradles for industrial scanners, payment terminals, and medical tablets fit naturally with the STUSB4500LQTR because it is a fully standalone PD sink with no MCU required. Its dead-battery support means a deeply discharged device can be charged the moment it is placed in the cradle, even before power management firmware boots. Use the GPIO pin to drive a status LED that indicates when the negotiated PDO contract has settled and full charging current is available.
Recommended
Portable USB-PD Powered Audio Amplifier
Portable USB-C PD powered audio amplifiers use the STUSB4500LQTR to draw 15 W or higher peak power from a Type-C laptop or power bank, enabling high SPL output that a 5 V/0.5 A default would not. The standalone controller means the amplifier does not need a host MCU running Linux/RTOS to negotiate power, so it works as a 'dumb' device attached to any Type-C source. Downstream rail from a 12 V PDO powers a class-D amp; protection is straightforward given VBUS is sense-monitored internally.
Recommended
Recommended Products Summary
Engineering reference data for STUSB4500LQTR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STUSB4500QTR | STUSB4500LBJR | STUSB4500 |
|---|---|---|---|---|
| Package | 24-QFN-EP (4x4) | 24-QFN-EP (4x4) | 24-QFN-EP (4x4) | 24-QFN-EP (4x4) |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Max Sink Power | 15 W (5V/3A) | 15 W (5V/3A) | 15 W (5V/3A) | 100 W (20V/5A) |
| Automotive Grade | No (industrial -40 to +105C) | Yes (AEC-Q100) | No | No |
| Supply Voltage Range | 3.0 V to 22 V | 3.0 V to 22 V | 3.0 V to 22 V | 3.0 V to 22 V |
| Supply Current | 210 uA | 210 uA | 210 uA | 210 uA |
| Dead Battery Support | Yes | Yes | Yes | Yes |
| MSL Level | MSL3 (168 hours) | MSL3 | MSL3 | MSL3 |
Key Differentiators
- Standalone PD sink controller - no MCU required for basic 5V/3A operation (vs FUSB302)
- AEC-Q100 automotive-grade sibling available in same package (vs STUSB4500LBJR)
- Compact 4x4 mm QFN-EP with integrated VBUS discharge (vs STUSB4500)
Design Notes
Per ST application note AN5465, place the CC1/CC2 pull-down resistors (Rd, typically 5.1 kohm) within 3 mm of the STUSB4500LQTR pins. Keep the CC traces matched in length and away from VBUS switching nodes. Use a 100 nF decoupling capacitor on VDD within 1 mm of pin 6, and a 10 uF bulk cap on VBUS_SENSE. Provide at least 1 square inch of copper under the exposed thermal pad (EP) tied to ground, since the part dissipates power across VBUS at 3 A continuous load.
Estimated: at 5 V/3 A (15 W) and worst-case ambient 85 C industrial environment, the 24-QFN-EP package must dissipate ~1.5 W of internal losses; with the EP soldered to a 1 sq-in copper pour on a 4-layer FR4 board, theta_JA is approximately 35 C/W. Junction temperature rise is around 53 C, keeping Tj below 138 C. Without EP soldering the chip will thermally throttle or fail; always reflow the EP per J-STD-020 MSL3 (168 hours floor life) profile.
Do not connect VBUS_SENSE directly to the Type-C VBUS pin without a series resistor (typically 100 kohm) and a decoupling capacitor, or the IC's internal voltage sense network may misread under transient load. Do not omit the I2C pull-up resistors (typically 4.7 kohm to VDD); the STUSB4500LQTR uses open-drain I/O. When using dead-battery mode, ensure the host system does not load the VBUS rail until the part's GPIO handshake completes, or the contract negotiation may fail on weak sources.
Compliance Information
Industrial-grade L part not AEC-Q100; choose STUSB4500QTR for AEC-Q100 automotive. REACH status verified unaffected via ST product declaration. Halogen-free per ST product page. RoHS compliant per distributor listings.
