TPS55065QPWPRQ1 - 40V 500mA Buck-Boost Converter | TI
N.º de pieza: TPS55065QPWPRQ1 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.4 | $2,40 |
| 10 | $2.13 | $21,30 |
| 100 | $1.85 | $185,00 |
| 500 | $1.62 | $810,00 |
| 1.000 | $1.45 | $1.450,00 |
TPS55065QPWPRQ1 Descripción general
A buck-boost converter is a switched-mode DC-DC topology that produces a regulated output voltage regardless of whether the input voltage is above, below, or equal to the output voltage. This category sits within the broader hierarchy of switching regulators -> DC-DC converters -> power management ICs -> semiconductors, and is essential when battery or supply voltages swing through the regulated rail (for example, a 12 V automotive rail that drops to 6 V during cranking and rises to 40 V on load dump). Because buck-boost regulators use the same inductor for both modes, they offer a single-IC solution for applications that traditionally required a SEPIC or cascaded buck-then-boost design.
Key features include an integrated high-side and low-side power switch pair, voltage-mode control with programmable current limit, fixed 5 V ±3% output, spread-spectrum frequency modulation and adjustable slew rate for EMI mitigation, a power-good reset output with programmable deglitch delay, and a wide 1.5 V to 40 V operating input range. The device operates with a 300 kHz to 2.2 MHz switching frequency (selectable via the RT/SS resistor) and provides internal soft start, cycle-by-cycle current limit, and thermal shutdown.
Architecturally, the TPS55065 uses a peak-current-mode control loop with internal compensation components, reducing external BOM count. The integrated 1.5 A MOSFET switches and built-in bootstrap circuit minimize gate-drive losses. The 20-pin HTSSOP package with PowerPAD provides a low thermal resistance of approximately 40 °C/W on a JEDEC-standard 4-layer test board, supporting 500 mA continuous output up to the maximum ambient temperature.
Typical applications include automotive infotainment power rails, body electronics and ECU supplies, USB charging ports, instrument cluster power, and industrial 12 V/24 V bus systems. The wide VIN range makes it particularly suitable for cold-cranking and load-dump conditions defined by ISO 7637-2 and ISO 16750-2.
A key design trade-off to consider is efficiency: buck-boost converters achieve high efficiency (typically >85% at moderate loads) but require careful inductor selection and input/output capacitor choice to maintain stability across mode transitions. Place the input and output capacitors close to the IC and follow TI's recommended LC values for the chosen operating frequency.
Alternativas directas para TPS55065QPWPRQ1 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
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TPS55065PWP
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TPS55065QPWPRQ1
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$1.45 / unidad
Ver hoja de datos →TPS55065PWPR
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TPS55065QPWPRQ1 Valores máximos y características eléctricas
| Topología | Buck-Boost (Step-Down/Step-Up) |
| Rango de tensión de entrada | 1.5 V to 40 V |
| Tensión de salida | 5 V fixed |
| Output Voltage Tolerance | ±3% |
| Corriente de salida máxima | 500 mA |
| Tipo de salida | Fixed |
| Control Mode | Voltage Mode |
| Rectificador síncrono | Yes (integrated) |
| Switching Frequency Range | 300 kHz to 2.2 MHz |
| Número de salidas | 1 |
| Reset/Power-Good Function | Yes (programmable delay) |
| EMI Features | Spread-spectrum, adjustable slew rate |
| Limitación de corriente | Programmable |
| Automotive Qualification | AEC-Q100 (Q1 suffix) |
| Temperatura de funcionamiento | -40 °C to +125 °C |
| Encapsulado | 20-pin HTSSOP (PWP) with PowerPAD |
| Tipo de montaje | Surface Mount |
| Power Dissipation | 3.9 W (per package datasheet rating) |
| Estado RoHS | Compliant |
Configuración de pines de TPS55065QPWPRQ1
| Pin 1 | BOOT — Bootstrap capacitor connection for high-side gate drive |
| Pin 2 | VIN — Input voltage supply (1.5 V to 40 V) |
| Pin 3 | EN — Enable input (active high) |
| Pin 4 | RT/SS — Frequency set / soft-start programming resistor |
| Pin 5 | VREF — Internal reference bypass |
| Pin 6 | COMP — Compensation network node |
| Pin 7 | FB — Feedback (used for fixed 5 V output sense) |
| Pin 8 | RESET — Power-good reset output (open-drain) |
| Pin 9 | PGOOD — Power-good indicator |
| Pin 10 | SS/TR — Soft-start / tracking input |
| Pin 11 | AGND — Analog ground |
| Pin 12 | NC — Not connected (per datasheet) |
| Pin 13 | NC — Not connected (per datasheet) |
| Pin 14 | SW — Switch node (inductor connection) |
| Pin 15 | SW — Switch node (inductor connection) |
| Pin 16 | PGND — Power ground |
| Pin 17 | PGND — Power ground |
| Pin 18 | VOUT — 5 V regulated output |
| Pin 19 | VIN — Input voltage supply |
| Pin 20 | PGND — Power ground |
Aplicaciones típicas
TPS55065QPWPRQ1 es adecuado para 6 aplicacións: Automotive Infotainment Power Rail, Automotive Body Electronics ECU, Industrial 24V Bus to 5V Conversion, USB Charging Port Supply, Battery-Powered Portable Instrument, Automotive Instrument Cluster Supply.
Automotive Infotainment Power Rail
The TPS55065QPWPRQ1 supplies a regulated 5 V rail to head-unit, display, and audio-amplifier subsystems in automotive infotainment. The fixed 5 V output directly powers USB VBUS lines, LCD bias circuits, and MCU rails without additional post-regulation. AEC-Q100 qualification plus the 1.5 V-40 V input range lets one IC handle cold-crank dips to 6 V and 40 V load-dump transients per ISO 7637-2. The integrated switches and 500 mA continuous output eliminate external FETs and reduce BOM count versus SEPIC or buck+LDO cascades. Spread-spectrum frequency modulation and adjustable slew rate address CISPR 25 Class 5 EMI requirements, minimizing input filter cost in radio-co-located designs.
Recomendado
Automotive Body Electronics ECU
Body control modules (BCMs) and zonal ECUs rely on the TPS55065QPWPRQ1 for a stable 5 V rail from the harsh 12 V automotive bus. The buck-boost topology maintains regulation during cold-start when the battery sags and during load-dump when the alternator spike hits 40 V - conditions where a buck-only converter would drop out. The PowerPAD package exposes a low thermal-resistance pad for direct PCB copper heat-sinking under the hood. AEC-Q100 Grade 1 (-40 °C to +125 °C) qualification matches underhood and cabin ECU thermal profiles. Programmable reset/power-good output drives MCU NRST lines for deterministic boot sequencing.
Recomendado
Industrial 24V Bus to 5V Conversion
Factory automation and process-control PLCs use the TPS55065QPWPRQ1 to derive a clean 5 V from a noisy 24 V industrial supply. The wide 1.5 V-40 V input tolerates large voltage excursions on long cable runs, while the buck-boost topology keeps regulation during brown-out conditions when the 24 V bus sags toward 12 V. The internal compensation network simplifies loop design and removes the need for external compensation components. The integrated power-good reset signal provides fault indication to the host controller. With 500 mA continuous output, the part powers sensor interfaces, isolated transceivers, and low-power communication PHYs on a single board.
Recomendado
USB Charging Port Supply
In-vehicle and industrial USB charging ports leverage the TPS55065QPWPRQ1's fixed 5 V output to power VBUS directly. The 500 mA continuous current meets BC1.2 Type-A charging requirements, and the wide VIN range supports both 12 V automotive and 24 V industrial sources without changing the design. Power-good reset signaling indicates VBUS stable for downstream USB switch and port-controller ICs. The integrated high-side/low-side switches and small 20-pin HTSSOP footprint minimize PCB area in head-unit USB modules. Adjustable switching frequency (300 kHz-2.2 MHz) lets designers avoid AM-band interference.
Recomendado
Battery-Powered Portable Instrument
Portable measurement and diagnostic instruments benefit from the TPS55065QPWPRQ1's buck-boost topology when powered from multi-cell battery packs or USB sources. With input 1.5 V-40 V and output 5 V fixed, a single regulator handles 2-cell Li-Ion (8.4 V max), 12 V lead-acid, and 24 V bench supplies. The 500 mA output powers sensor front-ends, ADCs, and BLE/Wi-Fi modules. Low quiescent current and high efficiency at moderate loads extend battery runtime. The HTSSOP PowerPAD package fits handheld enclosures while providing sufficient thermal headroom for 500 mA continuous operation.
Recomendado
Automotive Instrument Cluster Supply
Digital instrument clusters use the TPS55065QPWPRQ1 to power display drivers, stepper-motor gauge controllers, and warning-indicator LEDs from the 12 V automotive bus. The 1.5 V-40 V input range covers all ISO 16750-2 transient and cranking profiles without external protection circuits. Fixed 5 V output simplifies downstream LDO design for analog gauge drivers. AEC-Q100 Grade 1 qualification supports under-dash thermal environments, while the PowerPAD provides direct PCB heat dissipation. The reset output signals MCU when the 5 V rail is out of tolerance, ensuring safe gauge-state recovery.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TPS55065QPWPRQ1 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TPS55065PWP | TPS55065PWPR |
|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 20-HTSSOP (PWP) | 20-HTSSOP (PWP) - same | 20-HTSSOP (PWP) - same |
| Input Voltage Range | 1.5 V to 40 V | 1.5 V to 40 V | 1.5 V to 40 V |
| Output Voltage | 5 V fixed | 5 V fixed | 5 V fixed |
| Output Current | 500 mA | 500 mA | 500 mA |
| Automotive Qualification (AEC-Q100) | Yes (Grade 1) | No | No |
| Topology | Buck-Boost | Buck-Boost | Buck-Boost |
| Switching Frequency Range | 300 kHz to 2.2 MHz | 300 kHz to 2.2 MHz | 300 kHz to 2.2 MHz |
| Power-Good Reset Output | Yes | Yes | Yes |
Diferenciadores clave
- Automotive-grade AEC-Q100 qualification in same package as industrial variant (frente a TPS55065PWP)
- Single-IC buck-boost with 1.5 V-40 V input replaces SEPIC or cascaded converters (frente a Discrete SEPIC design)
- Programmable power-good reset and current limit for functional safety (frente a LM2576-based buck-boost design)
Notas de diseño
Estimated: At VIN = 24 V, VOUT = 5 V, and 500 mA load, power dissipation is approximately (24 V - 5 V) × 0.5 A × (1 - efficiency). Assuming 90% efficiency, dissipation is ~1.1 W. The 20-pin HTSSOP PowerPAD has a typical theta_JA of ~40 °C/W on a JEDEC 4-layer board, yielding a ~44 °C junction temperature rise. At 85 °C ambient the junction reaches ~129 °C, well within the 150 °C thermal-shutdown limit. For continuous 500 mA operation above 105 °C ambient, increasing the PCB copper pour around the PowerPAD to at least 1 square inch is recommended.
Place the input bulk capacitor, bootstrap capacitor, and output capacitor as close as possible to the IC pins to minimize parasitic inductance on the switch node (SW). Use a 4-layer PCB with a dedicated ground plane under the device; connect the PowerPAD to the ground plane with multiple thermal vias (typically 5-9 vias of 0.3 mm diameter). Keep the switch-node trace short and surrounded by ground copper to reduce radiated EMI. Place the feedback trace away from the SW node to avoid noise coupling; a 10 nF ceramic bypass on VREF is recommended.
Common pitfalls when designing with the TPS55065QPWPRQ1: (1) Selecting an inductor with insufficient saturation current rating - peak currents can reach 1.5 A; choose an inductor rated at 2 A or higher. (2) Omitting the bootstrap (BOOT) capacitor - the high-side gate drive fails without it, resulting in no output. (3) Exceeding the 40 V absolute maximum VIN during load-dump transients - add a TVS clamp or upstream protection if the input source is unregulated. (4) Forgetting to program RT/SS resistor - default switching frequency may interfere with AM radio band.
To meet CISPR 25 Class 5 automotive EMI requirements, enable the TPS55065's spread-spectrum frequency modulation via the RT/SS resistor configuration. Place a common-mode filter on the input supply line to attenuate conducted emissions. Use shielded inductors or pot-core inductors to minimize near-field radiation from the SW node. Avoid routing the SW trace near sensitive analog signal traces; if necessary, route on an inner PCB layer between two ground planes.
Información de cumplimiento
AEC-Q100 Grade 1 qualified per TI product page (Q1 suffix). RoHS and REACH compliant per TI material declaration. Halogen-free status not specified in the verified web data - flagged as unknown.
