LTC3372EUH#PBF - 60V Low IQ Buck Controller + 4-Channel 8A Configurable Buck DC/DCs | Analog Devices
MPN: LTC3372EUH#PBF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $9.8 | $980.00 |
| 500 | $8.9 | $4,450.00 |
| 1,000 | $8.1 | $8,100.00 |
Drop-in alternatives for LTC3372EUH#PBF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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Request AlternativesLTC3372EUH#PBF Maximum Ratings & Electrical Characteristics
| Input Voltage Range (HV Controller) | 4.5V to 60V |
| Number of LV Buck Channels | 4 |
| Total LV Output Current | 8A (configurable) |
| Output Voltage Range (LV) | 0.8V to VIN (adjustable) |
| Switching Frequency | 1MHz to 3MHz (programmable) |
| Quiescent Current | Low IQ (specific value [DATA_NEEDED: IQ]) |
| Operating Temperature Range | -40°C to 125°C (junction) |
| Package | 48-QFN (7x7mm) |
| Mounting Type | Surface Mount |
| Control Architecture | Current Mode |
| Synchronous Rectification | Yes (LV channels) |
| Spread Spectrum | Yes |
| Power Good Output | Yes |
| Soft-Start | Yes (programmable) |
| RoHS Status | Compliant |
LTC3372EUH#PBF Pin Configuration
| Pin 1 | HVIN — High-voltage controller input |
| Pin 2 | HVGATE — High-side gate drive output |
| Pin 3 | HVSW — Switch node for HV controller |
| Pin 4 | HVFB — Feedback for HV controller |
| Pin 5 | GND — Ground |
| Pin 6 | LVIN1 — Input for LV buck channel 1 |
| Pin 7 | LVSW1 — Switch node for LV buck channel 1 |
| Pin 8 | LVFB1 — Feedback for LV buck channel 1 |
| Pin 9 | LVIN2 — Input for LV buck channel 2 |
| Pin 10 | LVSW2 — Switch node for LV buck channel 2 |
| Pin 11 | LVFB2 — Feedback for LV buck channel 2 |
| Pin 12 | GND — 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
LTC3372EUH#PBF is suitable for 6 applications: Industrial Power Supplies, Automotive Infotainment, FPGA and Processor Power, Base Station Power, Battery-Powered Devices, Test and Measurement.
Industrial Power Supplies
The LTC3372EUH#PBF is ideal for industrial power supplies that require multiple regulated rails from a high-voltage input. Its 4.5V to 60V input range allows direct operation from 24V or 48V industrial buses. The HV controller can step down to an intermediate rail, while the four LV bucks generate core voltages for microcontrollers, FPGAs, and sensors. The low quiescent current helps meet standby power regulations, and the programmable switching frequency allows optimization for efficiency or EMI. With up to 8A total output, it can power a variety of loads in factory automation, process control, and test equipment.
Recommended
Automotive Infotainment
In automotive infotainment systems, the LTC3372EUH#PBF provides a compact power solution for processors, displays, and audio amplifiers. The wide input range handles load dump and cold-crank conditions (down to 4.5V). The four LV channels can supply 1.8V, 3.3V, and 5V rails with high efficiency, reducing heat in the dashboard. The spread spectrum feature minimizes EMI, which is critical for automotive EMC compliance. The device's -40°C to 125°C operating range ensures reliable operation in extreme environments. For AEC-Q100 compliance, consider the LTC3372HUK#TRPBF variant.
Recommended
FPGA and Processor Power
FPGAs and processors often require multiple voltage rails (core, I/O, auxiliary) with precise sequencing. The LTC3372EUH#PBF simplifies this by integrating four configurable buck converters and a high-voltage controller. The LV channels can be paralleled to provide up to 8A for a high-current core rail, while the HV controller can generate a higher voltage for peripherals. The programmable soft-start and power-good outputs enable proper power sequencing. The high switching frequency (up to 3MHz) allows the use of small inductors, saving board space. This makes the LTC3372 ideal for communications, networking, and embedded computing systems.
Recommended
Base Station Power
In base station and telecom equipment, the LTC3372EUH#PBF provides a robust power solution for 48V backplane systems. The HV controller steps down 48V to an intermediate bus, while the four LV bucks generate the low voltages needed for digital logic, RF transceivers, and signal processing. The wide input range and high efficiency reduce power loss and heat, which is crucial in densely packed equipment. The low quiescent current helps meet energy efficiency standards. The device's programmable frequency allows synchronization to avoid beat frequencies with RF circuits. This makes it suitable for remote radio heads, small cells, and distributed antenna systems.
Recommended
Battery-Powered Devices
For battery-powered devices, the LTC3372EUH#PBF's low quiescent current (Low IQ) extends battery life. The wide input range allows operation from a variety of battery chemistries, including Li-ion (3.0V to 4.2V) and lead-acid (up to 60V for HV controller). The four LV channels can efficiently generate multiple voltages for sensors, MCUs, and wireless modules. The device supports burst mode operation for light loads, further reducing power consumption. The small 48-QFN package and high integration save board space, making it suitable for portable instruments, medical devices, and IoT gateways.
Recommended
Test and Measurement
In test and measurement equipment, the LTC3372EUH#PBF provides clean, stable power rails for precision analog circuits. The low output ripple and high PSRR of the LV bucks ensure minimal noise injection into sensitive measurement paths. The programmable frequency allows optimization to avoid interference with measurement frequencies. The HV controller can generate higher voltages for stimulus circuits, while the LV channels power ADCs, DACs, and digital logic. The device's thermal performance in the 48-QFN package supports continuous operation in benchtop instruments. This makes it suitable for oscilloscopes, spectrum analyzers, and data acquisition systems.
Recommended
Recommended Products Summary
Engineering reference data for LTC3372EUH#PBF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC3372EUK#PBF | LTC3372HUK#TRPBF | TPS65381A-Q1 |
|---|---|---|---|---|
| Package | 48-QFN (7x7mm) | 48-QFN (7x7mm) | 48-QFN (7x7mm) | 48-QFN (7x7mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Input Voltage Range | 4.5V to 60V | 4.5V to 60V | 4.5V to 60V | 4.5V to 40V |
| Number of Outputs | 1 HV controller + 4 LV bucks | 1 HV controller + 4 LV bucks | 1 HV controller + 4 LV bucks | 3 bucks + 1 LDO |
| Total Output Current | 8A (LV) | 8A (LV) | 8A (LV) | 3A (bucks) |
| Switching Frequency | 1MHz to 3MHz | 1MHz to 3MHz | 1MHz to 3MHz | 2.2MHz fixed |
| Operating Temperature | -40°C to 125°C | -40°C to 125°C | -40°C to 150°C | -40°C to 125°C |
| AEC-Q100 | No | No | No | Yes |
Key Differentiators
- Integrated high-voltage controller plus four low-voltage bucks (vs LTC3370EUH#PBF)
- Wide input voltage range (4.5V to 60V) (vs TPS65381A-Q1)
- Configurable 8A total output current (vs TPS65381A-Q1)
Design Notes
For the HV controller, select external N-channel MOSFETs with appropriate voltage and current ratings. Ensure the gate drive voltage is sufficient to fully enhance the FETs. Use a bootstrap capacitor for the high-side FET. The LV buck channels have internal switches, but proper input and output capacitance is essential for stability. Refer to the datasheet for recommended capacitor values and ESR ranges.
The 48-QFN package has an exposed pad that must be soldered to a large copper area on the PCB for effective heat dissipation. Calculate power dissipation based on the total output current and efficiency. For high-current applications, consider adding thermal vias under the pad. The junction temperature should be kept below 125°C for reliable operation.
Keep the high-current paths (input, switch nodes, output) short and wide to minimize parasitic inductance and resistance. Place the input capacitors close to the VIN pins and the output capacitors close to the feedback sense points. For the HV controller, route the gate drive traces carefully to avoid noise coupling. Use a solid ground plane and separate analog and power grounds if necessary.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified; for automotive grade, consider LTC3372HUK#TRPBF or TPS65381A-Q1.
