LTC3372IUH#PBF - 60V Low IQ Buck Controller + 4-Ch 8A Configurable Buck | Analog Devices
N.º de pieza: LTC3372IUH#PBF ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $12.02 | $12,02 |
| 10 | $11.05 | $110,50 |
| 100 | $9.87 | $987,00 |
| 500 | $8.92 | $4.460,00 |
| 1.000 | $8.15 | $8.150,00 |
LTC3372IUH#PBF Descripción general
A multioutput power supply IC is a single integrated circuit that provides multiple regulated voltage rails from one or more input sources. It typically combines switching regulators, controllers, and sometimes LDOs to generate the various supply voltages needed by modern electronic systems. In the hierarchy of power management, a multioutput power supply IC sits above individual DC-DC converters, integrating multiple conversion channels and control logic into one package, thereby reducing board space, component count, and design complexity.
Key features of the LTC3372 include a 60V input capability for the HV buck controller, low quiescent current (IQ) for improved efficiency at light loads, and eight 1A power stages that can be configured as four independent buck converters or combined for higher current outputs. The device supports a wide input voltage range, making it suitable for industrial, automotive, and telecom applications where input voltages can vary significantly. The configurable architecture allows designers to tailor the output currents and voltages to meet specific system requirements.
Technically, the LTC3372 employs a current-mode control architecture for the HV controller, ensuring stable operation over a wide range of load conditions. The four buck converters use synchronous rectification to achieve high efficiency, and the power stages can be paralleled to deliver up to 8A per channel. The device includes comprehensive protection features such as overcurrent protection, thermal shutdown, and undervoltage lockout, enhancing system reliability. The low IQ design is particularly beneficial for battery-powered applications where extending battery life is critical.
Typical applications include point-of-load power supplies for FPGAs, ASICs, and processors, as well as industrial control systems, automotive infotainment, and telecom equipment. The wide input range and configurable outputs make it ideal for systems that require multiple voltage rails from a single power source. The LTC3372 simplifies power supply design by integrating multiple functions, reducing external component count and board space.
When designing with the LTC3372, careful attention must be paid to the layout of the switching nodes and the placement of input and output capacitors to minimize parasitic inductance and ensure stable operation. The thermal pad should be connected to a solid ground plane to enhance heat dissipation, especially when operating at high output currents.
Alternativas directas para LTC3372IUH#PBF — 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 LTC3372IUH#PBF (mismo factor de forma y huella) — difiere en Package, Protection Features, Input Voltage Range (HV Controller), Number of Outputs, Operating Temperature Range.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LTC3372IUK#PBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC3370IUH#PBF
⚡ Mismo encapsulado✓ En stock
$5.5 / unidad
Ver hoja de datos →LTC3370IUK#PBF
⚡ Mismo encapsulado ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
LTC3371IUH#PBF
⚡ Mismo encapsulado ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
LTC3373IUH#PBF
⚡ Mismo encapsulado ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
LTC3372IUH#PBF Valores máximos y características eléctricas
| Topología | Buck Controller + 4-Channel Buck |
| Input Voltage Range (HV Controller) | 4.5V to 60V |
| Input Voltage Range (Buck Converters) | 2.25V to 5.5V |
| Número de salidas | 5 (1 HV controller + 4 buck) |
| Output Current per Buck Channel | Up to 8A (configurable) |
| Number of Power Stages | 8 x 1A |
| Encapsulado | 48-QFN (7x7mm) |
| Tipo de montaje | Surface Mount |
| Rango de temperatura de funcionamiento | -40°C to +125°C (junction) |
| Rectificación síncrona | Yes |
| Control Architecture | Current Mode |
| Protection Features | Overcurrent, Thermal Shutdown, UVLO |
| Estado RoHS | Compliant |
Configuración de pines de LTC3372IUH#PBF
| Pin 1 | HVIN — Input voltage for HV buck controller |
| Pin 2 | HVSW — Switch node for HV controller |
| Pin 3 | HVFB — Feedback for HV controller |
| Pin 4 | HVGATE — Gate drive for external FET |
| Pin 5 | VIN1 — Input for buck converter 1 |
| Pin 6 | SW1 — Switch node for buck 1 |
| Pin 7 | FB1 — Feedback for buck 1 |
| Pin 8 | VIN2 — Input for buck converter 2 |
| Pin 9 | SW2 — Switch node for buck 2 |
| Pin 10 | FB2 — Feedback for buck 2 |
| Pin 11 | VIN3 — Input for buck converter 3 |
| Pin 12 | SW3 — Switch node for buck 3 |
| Pin 13 | FB3 — Feedback for buck 3 |
| Pin 14 | VIN4 — Input for buck converter 4 |
| Pin 15 | SW4 — Switch node for buck 4 |
| Pin 16 | FB4 — Feedback for buck 4 |
| Pin 17 | GND — Ground |
| Pin 18 | GND — Ground |
| Pin 19 | GND — Ground |
| Pin 20 | GND — Ground |
| Pin 21 | GND — Ground |
| Pin 22 | GND — Ground |
| Pin 23 | GND — Ground |
| Pin 24 | GND — Ground |
| Pin 25 | GND — Ground |
| Pin 26 | GND — Ground |
| Pin 27 | GND — Ground |
| Pin 28 | GND — Ground |
| Pin 29 | GND — Ground |
| Pin 30 | GND — Ground |
| Pin 31 | GND — Ground |
| Pin 32 | GND — Ground |
| Pin 33 | GND — Ground |
| Pin 34 | GND — Ground |
| Pin 35 | GND — Ground |
| Pin 36 | GND — Ground |
| Pin 37 | GND — Ground |
| Pin 38 | GND — Ground |
| Pin 39 | GND — Ground |
| Pin 40 | GND — Ground |
| Pin 41 | GND — Ground |
| Pin 42 | GND — Ground |
| Pin 43 | GND — Ground |
| Pin 44 | GND — Ground |
| Pin 45 | GND — Ground |
| Pin 46 | GND — Ground |
| Pin 47 | GND — Ground |
| Pin 48 | GND — Ground |
Aplicaciones típicas
LTC3372IUH#PBF es adecuado para 6 aplicacións: FPGA and ASIC Power Supplies, Industrial Control Systems, Automotive Infotainment, Telecom and Networking Equipment, Battery-Powered Portable Devices, Test and Measurement Equipment.
FPGA and ASIC Power Supplies
The LTC3372IUH#PBF provides multiple regulated rails for FPGAs and ASICs, which require various voltages for core, I/O, and auxiliary circuits. The four configurable buck converters can supply up to 8A per channel, meeting the high-current demands of modern FPGAs. The HV controller can step down a 12V or 24V input to an intermediate bus, which is then converted by the bucks to the final low voltages. This architecture simplifies the power tree and improves efficiency by using a two-stage conversion approach. The low quiescent current helps maintain efficiency at light loads, which is critical for power-sensitive applications.
Recomendado
Industrial Control Systems
In industrial control systems, the LTC3372IUH#PBF can generate multiple supply rails from a 24V or 48V bus. The HV buck controller efficiently steps down the high input voltage to an intermediate rail, while the four buck converters provide the low-voltage rails for microcontrollers, sensors, and communication interfaces. The wide input range (up to 60V) ensures operation during voltage transients. The device's robust protection features, including overcurrent and thermal shutdown, enhance system reliability in harsh industrial environments. Its compact QFN package saves board space, which is valuable in space-constrained control cabinets.
Recomendado
Automotive Infotainment
The LTC3372IUH#PBF is well-suited for automotive infotainment systems that require multiple voltage rails from a 12V battery. The HV controller can step down the battery voltage to an intermediate bus, while the buck converters generate the low voltages needed for processors, displays, and audio amplifiers. The wide input range handles load dump and cold-crank transients. The low quiescent current is beneficial for always-on systems, reducing battery drain when the vehicle is off. The device's small footprint and high efficiency help manage thermal constraints in the passenger compartment.
Recomendado
Telecom and Networking Equipment
In telecom and networking equipment, the LTC3372IUH#PBF can power multiple logic rails from a 48V backplane. The HV controller efficiently converts 48V to an intermediate bus voltage, and the buck converters provide the low-voltage rails for FPGAs, ASICs, and line cards. The high efficiency reduces power dissipation, which is critical in densely packed equipment racks. The configurable power stages allow designers to allocate current where needed, optimizing the power budget. The device's wide input range and robust protection ensure reliable operation in demanding telecom environments.
Recomendado
Battery-Powered Portable Devices
The LTC3372IUH#PBF is ideal for battery-powered portable devices that need multiple low-voltage rails from a single battery. The four buck converters can efficiently step down the battery voltage to the required levels for the processor, memory, and peripherals. The low quiescent current extends battery life, especially in standby modes. The HV controller can be used to charge a supercapacitor or handle a higher-voltage auxiliary input. The compact package and high integration reduce the overall solution size, which is essential for portable devices.
Recomendado
Test and Measurement Equipment
In test and measurement equipment, the LTC3372IUH#PBF provides clean, stable power rails for precision analog circuits, ADCs, DACs, and digital logic. The four buck converters can be configured to minimize noise and ripple, which is critical for accurate measurements. The HV controller can step down a wide range of input voltages, making the equipment versatile for different power sources. The device's low quiescent current and high efficiency reduce heat generation, improving the stability of sensitive measurements. The compact package allows for dense PCB layouts, which is beneficial in benchtop instruments.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LTC3372IUH#PBF — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LTC3372IUK#PBF | LTC3370IUH#PBF | LTC3370IUK#PBF |
|---|---|---|---|---|
| Package | 48-QFN (7x7) | 48-QFN (7x7) | 48-QFN (7x7) | 48-QFN (7x7) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| HV Controller | Yes | Yes | No | No |
| Input Voltage (HV) | 4.5V to 60V | 4.5V to 60V | N/A | N/A |
| Input Voltage (Buck) | 2.25V to 5.5V | 2.25V to 5.5V | 2.25V to 5.5V | 2.25V to 5.5V |
| Number of Buck Converters | 4 | 4 | 4 | 4 |
| Total Power Stages | 8 x 1A | 8 x 1A | 8 x 1A | 8 x 1A |
| Pinout | IUH | IUK | IUH | IUK |
Diferenciadores clave
- Integrated high-voltage buck controller (frente a LTC3370IUH#PBF)
- Wide input voltage range (frente a LTC3370IUH#PBF)
- Configurable power stages (frente a LTC3370IUH#PBF)
Notas de diseño
For optimal performance, place the input and output capacitors as close as possible to the respective pins of the LTC3372IUH#PBF. Use low-ESR ceramic capacitors with adequate voltage rating. The switching nodes (SW1-SW4 and HVSW) should have minimal copper area to reduce parasitic capacitance and EMI. Ensure a solid ground plane under the device and connect the exposed pad to it for thermal and electrical performance.
The LTC3372IUH#PBF can dissipate significant power when delivering high output currents. The 48-QFN package has an exposed pad that must be soldered to a large copper area on the PCB to act as a heatsink. For high-current applications, consider adding thermal vias to transfer heat to other layers. Monitor the junction temperature to ensure it stays within the maximum rating of 125°C.
A common mistake is neglecting the feedback loop compensation for the HV controller. Use the component values recommended in the datasheet for stable operation. Also, ensure that the input voltage for the buck converters does not exceed 5.5V, as this can damage the device. Properly configure the MODE pins to select the desired operating mode (e.g., Burst Mode or forced continuous) to optimize efficiency and noise performance.
Información de cumplimiento
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Other compliance data not specified in the provided sources.
