TPS65381A-Q1 - 5-Output Safety PMIC 4.5-40V | Texas Instruments
N.º de pieza: TPS65381A-Q1 ✓ Activo| Cant. | Precio unitario | Total |
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| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1.000 | $0 | $0,00 |
TPS65381A-Q1 Descripción general
A PMIC (Power Management IC) is a specialized voltage regulator subsystem that consolidates multiple power rails - buck converters and LDOs - into one device. In the power-management hierarchy, the TPS65381A-Q1 sits above single-channel regulators and below full battery-management systems, purpose-built as an MCU power companion for functional-safety systems.
Key strengths include the wide 4.5V to 40V input range that directly tolerates automotive 12V battery transients, five simultaneous regulated rails eliminating a discrete multi-IC power tree, AEC-Q100 qualification for automotive environments, and SPI-configurable supervision supporting safety mechanisms such as voltage monitoring and diagnostics. The device supports TI Hercules TMS570 and C2000 MCU families as well as dual-core lockstep (LS) and loosely-coupled (LC) MCU architectures.
Architecturally, the integrated step-down converter generates the primary MCU core rail while the LDOs supply I/O, analog, and CAN/transceiver rails with low-noise, high-PSRR performance. Built-in power-up sequencing, windowed voltage supervision, and fault reporting reduce external component count and simplify ISO 26262-oriented system designs. According to TI datasheet documentation (120 pages), the register map is SPI-accessible for runtime configuration.
Typical applications include automotive ADAS domain controllers, electric power steering, gateway modules, and industrial functional-safety controllers built on dual-core lockstep MCUs.
Design consideration: TI states no pin-to-pin compatible replacements exist for this part, so second-source strategy must be architectural rather than drop-in. Verify SPI register configuration and sequencing timing against your MCU power requirements during layout.
Alternativas directas para TPS65381A-Q1 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con TPS65381A-Q1 (mismo factor de forma y huella) — difiere en Package, Power Good Output, Qualification.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
TPS65381QDAPRQ1
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TPS65381AQDAPTQ1
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TPS653851AQDAPRQ1
⚡ Mismo encapsulado📋 Alternativa de referencia (no en el catálogo)
TPS65386AQDAPRQ1
⚡ Mismo encapsulado ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TPS65381A-Q1 Valores máximos y características eléctricas
| Función | Multi-rail PMIC for MCUs in safety applications |
| Número de salidas | 5 |
| Topología | 1 buck converter (integrated FETs) + 4 LDOs |
| Rango de tensión de entrada | 4.5 V to 40 V |
| Supported MCUs | TI Hercules TMS570, C2000, dual-core lockstep (LS) and loosely-coupled (LC) architectures |
| Control Interface | SPI (configurable supervision and diagnostics) |
| Safety Mechanisms | Windowed voltage supervision, fault reporting, power-up sequencing |
| Qualification | AEC-Q100 (automotive) |
| Encapsulado | 32-HTSSOP PowerPAD (DAP) |
| Tipo de montaje | Surface Mount |
| Applications Market | Automotive and industrial |
| Ordering Part Numbers | TPS65381AQDAPRQ1 (reel), TPS65381AQDAPTQ1 (tray) |
Guía de configuración de pines de TPS65381A-Q1 32-htssop powerpad (dap)
Configuración de pines para TPS65381A-Q1 (encapsulado 32-htssop powerpad (dap)). Este dispositivo de potencia presenta terminales de puerta, drenador y fuente. Para encapsulados no polarizados, consulte la hoja de datos del fabricante para conocer la orientación exacta del pin 1 y los detalles del footprint. Las aplicaciones habituales incluyen el diseño de fuentes de alimentación, el accionamiento de motores y la conmutación de cargas.
No hay datos detallados de patillaje disponibles para TPS65381A-Q1.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
TPS65381A-Q1 es adecuado para 6 aplicacións: Automotive ADAS Domain Controllers, Electric Power Steering (EPS), Automotive Gateway Modules, Industrial Functional-Safety Controllers, TI Hercules TMS570 MCU Power, C2000 Motor Control Safety Systems.
Automotive ADAS Domain Controllers
ADAS domain controllers run dual-core lockstep MCUs whose core, I/O, and analog rails must be monitored for functional safety. The TPS65381A-Q1 generates all five rails from one 4.5V-40V automotive battery input; its windowed voltage supervision and SPI fault reporting give the MCU a safety-relevant power diagnostic path, while integrated sequencing removes discrete sequencer ICs from the power tree.
Recomendado
Electric Power Steering (EPS)
EPS ECUs combine safety MCUs, gate drivers, and CAN communication, all requiring sequenced, supervised rails. The TPS65381A-Q1's four LDOs supply I/O, analog, and transceiver rails with low noise while the buck powers the MCU core from the 12V battery line, tolerating cranking transients up to 40V. SPI diagnostics support the safety concept required for steering-related ASIL-rated systems.
Recomendado
Automotive Gateway Modules
Gateway modules bridge CAN, LIN, and Ethernet domains and typically use lockstep MCUs. The TPS65381A-Q1 supplies the MCU core via its integrated buck and powers transceivers through its LDOs, from a single battery input. Windowed supervision flags out-of-range rails to the MCU, and the 32-HTSSOP PowerPAD package simplifies thermal design in the constrained gateway PCB area.
Recomendado
Industrial Functional-Safety Controllers
Industrial safety controllers (per IEC-oriented functional-safety practice) pair dual-core MCUs with monitored power. The TPS65381A-Q1's SPI-configurable voltage supervision and fault reporting map directly to safety-manual requirements, and its wide 4.5V-40V input suits 24V industrial rails. Five integrated outputs replace a discrete multi-IC power tree, cutting BOM count and qualification effort.
Recomendado
TI Hercules TMS570 MCU Power
The TPS65381A-Q1 is purpose-built as the power companion for TI Hercules TMS570 MCUs, matching the required core and I/O rails and startup sequencing. TI SafeTI Diagnostic Library drivers for TMS570 work with this device directly, and the device's supervision outputs tie into the MCU safety mechanisms, giving a validated MCU-plus-PMIC power architecture for safety applications.
Recomendado
C2000 Motor Control Safety Systems
C2000-based motor drives in automotive and industrial safety contexts need clean analog rails for ADC accuracy alongside the MCU core rail. The TPS65381A-Q1's LDOs provide the low-noise analog supply while the buck powers the core, and its supervision reports power faults to the C2000 diagnostics. This supports safety-rated drives such as traction inverters and servo axes.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TPS65381A-Q1 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TPS65381QDAPRQ1 | TPS65381AQDAPTQ1 | TPS653851AQDAPRQ1 |
|---|---|---|---|---|
| Package | 32-HTSSOP PowerPAD (DAP) | 32-HTSSOP PowerPAD (DAP) - same | 32-HTSSOP PowerPAD (DAP) - same | 32-HTSSOP PowerPAD (DAP) - same package, different family |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Pin-to-Pin Compatibility | Reference | Yes - exact equivalent per TI | Yes - same die | No - significant hw/sw changes required per TI |
| Register Map / SPI Compatibility | Reference | Same register map and SPI timing | Identical | Different - software rewrite needed |
| Qualification | AEC-Q100 (-Q1) | AEC-Q100 (-Q1) | AEC-Q100 (-Q1) | AEC-Q100 (-Q1) |
Diferenciadores clave
- Exact drop-in equivalence within its own family (frente a TPS65381QDAPRQ1)
- Integrated 5-rail power tree with safety supervision (frente a TPS653851AQDAPRQ1)
- Wide 4.5V-40V single input eliminates preregulator (frente a Discrete buck + LDO solution)
Notas de diseño
Solder the exposed PowerPAD of the 32-HTSSOP (DAP) package to a solid PCB ground plane with an array of thermal vias. This pad is the primary thermal and ground path for the integrated buck FETs; an unsoldered or under-sized pad will cause excessive junction temperatures at buck load. Follow the datasheet layout section of the 120-page TI document for capacitor placement on the buck switch node and each LDO output.
TI states on E2E that TPS65385xx-Q1 cannot replace the TPS65381A-Q1 without significant software and hardware changes - do not assume family-level compatibility. Likewise the TPS65381-Q1 and TPS65381A-Q1 share the same register map and SPI timing, so SafeTI Diagnostic Library drivers work on both, but always re-verify SPI configuration and sequencing timing against your MCU power requirements during layout review.
Exploit the 4.5V to 40V input range to connect directly to the automotive 12V battery rail, but verify load-dump and cranking transients at your module level; if the transient exceeds 40V, add an upstream protection device. Use the SPI-configurable windowed supervision thresholds to match each rail's tolerance band to your MCU's safety requirements rather than defaulting to factory settings.
Keep the buck converter switching loop (input capacitor, integrated FETs, inductor) as compact as possible to minimize EMI on the analog LDO rails on the same die. Separate the quiet analog ground region feeding the LDO outputs from the high-di/dt buck return path, joining them at the PowerPAD. This preserves the low-noise quality of the I/O and transceiver rails.
Información de cumplimiento
AEC-Q100 qualification confirmed by -Q1 suffix and TI product page. Other compliance details should be confirmed on the TI.com quality page; not present in retrieved data.
