LTC3372IUH#PBF - 60V Low IQ Buck Controller + 4-Ch 8A Configurable Buck | Analog Devices
MPN: LTC3372IUH#PBF β Active| Qty | Unit Price | Extended |
|---|---|---|
| 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 |
Drop-in alternatives for LTC3372IUH#PBF β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
LTC3372IUK#PBF
β Drop-Inπ Reference alternative (not in catalog)
LTC3370IUH#PBF
β‘ Same Packageβ In Stock
$5.5 / Unit
View Datasheet βLTC3370IUK#PBF
β‘ Same Packageπ Reference alternative (not in catalog)
LTC3371IUH#PBF
β‘ Same Packageπ Reference alternative (not in catalog)
LTC3373IUH#PBF
β‘ Same Packageπ Reference alternative (not in catalog)
LTC3372IUH#PBF Maximum Ratings & Electrical Characteristics
| Topology | Buck Controller + 4-Channel Buck |
| Input Voltage Range (HV Controller) | 4.5V to 60V |
| Input Voltage Range (Buck Converters) | 2.25V to 5.5V |
| Number of Outputs | 5 (1 HV controller + 4 buck) |
| Output Current per Buck Channel | Up to 8A (configurable) |
| Number of Power Stages | 8 x 1A |
| Switching Frequency | [DATA_NEEDED: Switching frequency] |
| Quiescent Current | Low IQ (exact value [DATA_NEEDED]) |
| Package | 48-QFN (7x7mm) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40Β°C to +125Β°C (junction) |
| Synchronous Rectification | Yes |
| Control Architecture | Current Mode |
| Protection Features | Overcurrent, Thermal Shutdown, UVLO |
| RoHS Status | Compliant |
LTC3372IUH#PBF Pin Configuration
| Pin 1 | HVIN β Input voltage for HV buck controller |
| Pin 2 | HVSW β Switch node for HV controller |
| Pin 3 | HVFB β Feedback for HV controller |
| Pin 4 | HVGATE β Gate drive for external FET |
| Pin 5 | VIN1 β Input for buck converter 1 |
| Pin 6 | SW1 β Switch node for buck 1 |
| Pin 7 | FB1 β Feedback for buck 1 |
| Pin 8 | VIN2 β Input for buck converter 2 |
| Pin 9 | SW2 β Switch node for buck 2 |
| Pin 10 | FB2 β Feedback for buck 2 |
| Pin 11 | VIN3 β Input for buck converter 3 |
| Pin 12 | SW3 β Switch node for buck 3 |
| Pin 13 | FB3 β Feedback for buck 3 |
| Pin 14 | VIN4 β Input for buck converter 4 |
| Pin 15 | SW4 β Switch node for buck 4 |
| Pin 16 | FB4 β Feedback for buck 4 |
| Pin 17 | GND β Ground |
| Pin 18 | GND β Ground |
| Pin 19 | GND β Ground |
| Pin 20 | GND β Ground |
| Pin 21 | GND β Ground |
| Pin 22 | GND β Ground |
| Pin 23 | GND β Ground |
| Pin 24 | GND β Ground |
| Pin 25 | GND β Ground |
| Pin 26 | GND β Ground |
| Pin 27 | GND β Ground |
| Pin 28 | GND β Ground |
| Pin 29 | GND β Ground |
| Pin 30 | GND β Ground |
| Pin 31 | GND β Ground |
| Pin 32 | GND β Ground |
| Pin 33 | GND β Ground |
| Pin 34 | GND β Ground |
| Pin 35 | GND β Ground |
| Pin 36 | GND β Ground |
| Pin 37 | GND β Ground |
| Pin 38 | GND β Ground |
| Pin 39 | GND β Ground |
| Pin 40 | GND β Ground |
| Pin 41 | GND β Ground |
| Pin 42 | GND β Ground |
| Pin 43 | GND β Ground |
| Pin 44 | GND β Ground |
| Pin 45 | GND β Ground |
| Pin 46 | GND β Ground |
| Pin 47 | GND β Ground |
| Pin 48 | GND β Ground |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
LTC3372IUH#PBF is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for LTC3372IUH#PBF β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
Key Differentiators
- Integrated high-voltage buck controller (vs LTC3370IUH#PBF)
- Wide input voltage range (vs LTC3370IUH#PBF)
- Configurable power stages (vs LTC3370IUH#PBF)
Design Notes
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 125Β°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.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Other compliance data not specified in the provided sources.
