LTC3372IUH#PBF - 60V Low IQ Buck Controller + 4-Ch 8A Configurable Buck | Analog Devices
N.º da peça: LTC3372IUH#PBF ✓ Ativo| Qtd. | Preço unitário | 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 Visão geral
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 drop-in para LTC3372IUH#PBF — 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 LTC3372IUH#PBF (mesmo formato e footprint) — diferindo em Package, Protection Features, Input Voltage Range (HV Controller), Number of Outputs, Operating Temperature Range.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
LTC3372IUK#PBF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LTC3370IUH#PBF
⚡ Mesmo encapsulamento✓ Em estoque
$5.5 / unidade
Ver ficha técnica →LTC3370IUK#PBF
⚡ Mesmo encapsulamento ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
LTC3371IUH#PBF
⚡ Mesmo encapsulamento ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
LTC3373IUH#PBF
⚡ Mesmo encapsulamento ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
LTC3372IUH#PBF Classificações máximas e características elétricas
| Topologia | 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 saídas | 5 (1 HV controller + 4 buck) |
| Output Current per Buck Channel | Up to 8A (configurable) |
| Number of Power Stages | 8 x 1A |
| Encapsulamento | 48-QFN (7x7mm) |
| Tipo de montagem | Surface Mount |
| Faixa de temperatura de operação | -40°C to +125°C (junction) |
| Retificação síncrona | Yes |
| Control Architecture | Current Mode |
| Protection Features | Overcurrent, Thermal Shutdown, UVLO |
| Status RoHS | Compliant |
Configuração de pinos do LTC3372IUH#PBF
| Pino 1 | HVIN — Input voltage for HV buck controller |
| Pino 2 | HVSW — Switch node for HV controller |
| Pino 3 | HVFB — Feedback for HV controller |
| Pino 4 | HVGATE — Gate drive for external FET |
| Pino 5 | VIN1 — Input for buck converter 1 |
| Pino 6 | SW1 — Switch node for buck 1 |
| Pino 7 | FB1 — Feedback for buck 1 |
| Pino 8 | VIN2 — Input for buck converter 2 |
| Pino 9 | SW2 — Switch node for buck 2 |
| Pino 10 | FB2 — Feedback for buck 2 |
| Pino 11 | VIN3 — Input for buck converter 3 |
| Pino 12 | SW3 — Switch node for buck 3 |
| Pino 13 | FB3 — Feedback for buck 3 |
| Pino 14 | VIN4 — Input for buck converter 4 |
| Pino 15 | SW4 — Switch node for buck 4 |
| Pino 16 | FB4 — Feedback for buck 4 |
| Pino 17 | GND — Ground |
| Pino 18 | GND — Ground |
| Pino 19 | GND — Ground |
| Pino 20 | GND — Ground |
| Pino 21 | GND — Ground |
| Pino 22 | GND — Ground |
| Pino 23 | GND — Ground |
| Pino 24 | GND — Ground |
| Pino 25 | GND — Ground |
| Pino 26 | GND — Ground |
| Pino 27 | GND — Ground |
| Pino 28 | GND — Ground |
| Pino 29 | GND — Ground |
| Pino 30 | GND — Ground |
| Pino 31 | GND — Ground |
| Pino 32 | GND — Ground |
| Pino 33 | GND — Ground |
| Pino 34 | GND — Ground |
| Pino 35 | GND — Ground |
| Pino 36 | GND — Ground |
| Pino 37 | GND — Ground |
| Pino 38 | GND — Ground |
| Pino 39 | GND — Ground |
| Pino 40 | GND — Ground |
| Pino 41 | GND — Ground |
| Pino 42 | GND — Ground |
| Pino 43 | GND — Ground |
| Pino 44 | GND — Ground |
| Pino 45 | GND — Ground |
| Pino 46 | GND — Ground |
| Pino 47 | GND — Ground |
| Pino 48 | GND — Ground |
Aplicações típicas
LTC3372IUH#PBF é adequado para 6 aplicaçãos: 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
Resumo dos produtos recomendados
Dados de referência de engenharia para LTC3372IUH#PBF — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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 |
Principais diferenciais
- Integrated high-voltage buck controller (vs LTC3370IUH#PBF)
- Wide input voltage range (vs LTC3370IUH#PBF)
- Configurable power stages (vs LTC3370IUH#PBF)
Notas de projeto
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.
Informações de conformidade
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Other compliance data not specified in the provided sources.
