STUSB4531BJR - Standalone USB PD Sink Controller | ST
N.º da peça: STUSB4531BJR ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1.000 | $0 | $0,00 |
STUSB4531BJR Visão geral
A USB PD sink controller is the device-side counterpart in a USB Type-C power negotiation: it communicates with a source (charger, dock, or power adapter) over the CC line using the USB PD protocol to agree on a voltage and current contract. Within the power-management hierarchy, it sits between the USB-C receptacle and the system power path, upstream of DC-DC converters and battery chargers, and is a key building block of modern USB-C power interface ICs.
Key features include fully standalone autorun operation with a default PDO configuration stored in internal non-volatile memory, proprietary negotiation algorithms that secure a power contract without a host MCU, dead battery operation powered directly from the VBUS receptacle pins, and a wide 23 V VBUS tolerance that removes the need for external front-end protection in many designs.
The STUSB4531 implements its negotiation state machines in dedicated hardware, so it continues operating even when the application processor is asleep or unpowered. The hybrid mode allows an application MCU to monitor or adjust the negotiation, giving designers both autonomy and flexibility.
Typical applications include USB-C powered accessories, power banks, portable and wearable devices, battery-powered industrial sensors, and any sink-side system that must charge reliably from a fully depleted battery.
Design consideration: because the device is powered from VBUS receptacle pins, ensure the CC line ESD and VBUS discharge timing follow the reference design layout for robust hot-plug behavior.
This page adds value beyond the ST datasheet by synthesizing distributor pricing context, same-family drop-in alternatives, and practical design notes in one place.
Alternativas drop-in para STUSB4531BJR — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com STUSB4531BJR (mesmo formato e footprint) — diferindo em Dead Battery Mode, Function, Package, RoHS Status.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
STUSB4531QTR
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$1.58 / unidade
Ver ficha técnica →STUSB4531BJR Especificações
| Função | Standalone USB Type-C / USB PD sink controller |
| USB PD Role | Sink (power receiving device) |
| Negotiated PDOs | Up to 5 configurable |
| VBUS Voltage Rating | 23 V |
| Dead Battery Mode | Yes (STUSB4531BJR / STUSB4531QTR variants) |
| Operating Modes | Autorun mode, Hybrid mode |
| PDO Configuration Storage | Internal non-volatile memory |
| Temperatura de operação | -40C to +105C |
| Encapsulamento | 16-pin CSP (chip-scale package) |
| Tipo de montagem | Surface Mount |
| Software Requirement | None required for basic negotiation (standalone) |
| Typical Supply | Powered directly from VBUS receptacle pins |
| Applications | USB-C sink devices, battery-powered charging systems |
| Status RoHS | RoHS Compliant (per Mouser listing) |
Guia de Configuração de Pinos do STUSB4531BJR 16-pin csp (chip-scale package)
Configuração de pinos para STUSB4531BJR (pacote 16-pin csp (chip-scale package)). A numeração dos pinos, funções e diagramas de conexão estão definidos no datasheet do fabricante. Consulte-o para o footprint exato e diretrizes de soldagem.
Nenhum dado detalhado de pinagem disponível para STUSB4531BJR.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
STUSB4531BJR é adequado para 6 aplicaçãos: Power Banks, Portable and Wearable Devices, Battery-Powered Industrial Sensors, USB-C Powered Accessories, Medical and Health Monitoring Devices, IoT and Smart Home Devices.
Power Banks
The STUSB4531BJR fits power bank sink-side charging because its dead battery mode runs the controller directly from the VBUS receptacle pins, so the unit can negotiate a USB PD contract even at 0% state of charge. In a typical design the controller sits between the USB-C receptacle and the battery charger IC, negotiating up to five PDOs (for example 5V, 9V, 12V, 15V, 18V profiles) and instructing the charger to draw the agreed power. Because negotiation is handled in hardware via internal NVM settings, no firmware is needed, reducing BOM software cost. The 23 V VBUS tolerance protects against source voltage transients during contract renegotiation.
Recomendado
Portable and Wearable Devices
Wearables and portable electronics benefit from the STUSB4531BJR's autonomous operation: the 16-pin CSP chip-scale package minimizes PCB area in space-constrained designs, and autorun mode negotiates high-power charging profiles without waking the application processor, preserving battery life. In a typical application the controller draws operating power from VBUS, negotiates the optimal PDO with the charger, and signals the power path management IC to route the negotiated voltage. Dead battery mode is essential for consumer devices that must charge from empty out of the box. The -40C to +105C range also covers outdoor wearable use.
Recomendado
Battery-Powered Industrial Sensors
Industrial sensor nodes using USB-C service ports benefit from the STUSB4531BJR's -40C to +105C operating range and 23 V VBUS tolerance, which withstands harsh field conditions and unknown charger quality. The controller autonomously negotiates the fastest available PDO from field chargers and docks without MCU intervention, so a technician can fast-charge or power a sensor node from any USB-PD source. Because PDO settings live in internal non-volatile memory, fleet configuration can be set at production. Dead battery mode guarantees the node responds to charging even after deep discharge during long storage periods.
Recomendado
USB-C Powered Accessories
Accessories such as portable displays, desk gadgets, and powered hubs draw all operating power from a USB-C port. The STUSB4531BJR negotiates up to five configurable PDOs so the accessory can request exactly the voltage its internal DC-DC converters need, for example 15V or 18V for higher-power designs. Autorun mode means the accessory works the moment it is plugged in, with no driver or firmware handshake, improving perceived quality. Hybrid mode optionally lets a product MCU monitor the contract for user-facing power indicators while the STUSB4531 keeps autonomous control of the PD protocol.
Recomendado
Medical and Health Monitoring Devices
Battery-powered home health devices such as glucose meters, pulse oximeters, and thermometers require guaranteed charging behavior: a device that arrives or returns with an empty battery must still charge. The STUSB4531BJR's dead battery mode, powered directly from the VBUS receptacle pins, satisfies this requirement by negotiating USB PD power independently of the battery's state of charge. The small 16-pin CSP conserves board space in compact handheld enclosures, and the fully hardware-based negotiation removes firmware failure modes from the charging path, supporting the reliability expectations of medical device designs.
Recomendado
IoT and Smart Home Devices
USB-C is becoming the standard service port for smart home devices including doorbells, sensors, and controllers. The STUSB4531BJR lets these products fast-charge from standard USB-PD wall adapters by autonomously requesting an appropriate PDO, for example 9V, instead of defaulting to 5V at lower power. With configuration in internal NVM and zero software dependency, OEMs deploy the same controller across product families with different power levels by simply programming the PDO set at manufacturing. Dead battery mode ensures a deeply discharged device revives cleanly on first plug-in, reducing warranty returns.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para STUSB4531BJR — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | STUSB4531QTR |
|---|---|---|
| Package | 16-pin CSP | 16-pin CSP - same |
| Brand | STMicroelectronics | STMicroelectronics |
| USB PD Role | Sink | Sink |
| Configurable PDOs | Up to 5 | Up to 5 |
| VBUS Rating | 23 V | 23 V |
| Dead Battery Mode | Yes | Yes |
| Operating Temperature | -40C to +105C | -40C to +105C |
| Autorun / Hybrid Modes | Yes / Yes | Yes / Yes |
Principais diferenciais
- Dead battery operation from VBUS receptacle power (vs STUSB4500)
- Five configurable PDOs with no firmware (vs Generic MCU-based PD sink stack)
- 23 V VBUS tolerance in a 16-pin CSP (vs STUSB4531QTR)
Notas de projeto
The STUSB4531BJR is powered directly from the VBUS receptacle pins per the ST datasheet, which is what enables dead battery operation at SOC = 0%. Ensure the VBUS feed to the IC follows the datasheet reference design, including recommended series resistance and ceramic decoupling close to the VBUS pin, so hot-plug inrush and cable discharge transients do not disturb the 23 V-rated pin. Verify downstream charger IC enable thresholds against the lowest negotiated PDO voltage.
The 16-pin CSP has a very fine ball pitch; use the exact land pattern from the ST datasheet and inspect with appropriate solder-mask-defined pads. Route CC1/CC2 as a matched pair with the datasheet-specified series resistors and keep them short and away from switching nodes to preserve USB PD BMC communication integrity on the CC line. Provide local ground return under the CSP for signal integrity.
Do not assume the STUSB4531 will negotiate beyond the PDO set programmed in its internal non-volatile memory - the source can only offer, and the sink only accepts, PDOs contained in that stored configuration. For custom profiles, program the NVM at production. Also remember that only the BJR and QTR variants support dead battery mode; other orderable variants of the family may not, so confirm the suffix before release.
Informações de conformidade
Mouser listing identifies STUSB4531BJR as RoHS compliant and active. Other compliance declarations not captured in verified data; obtain certificates from the ST product page.
