LTC3370IUH#TRPBF - 4-Ch 8A Configurable Buck DC/DC | Analog Devices
MPN: LTC3370IUH#TRPBF β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.15 | $6.15 |
| 10 | $5.68 | $56.80 |
| 100 | $4.92 | $492.00 |
| 500 | $4.31 | $2,155.00 |
| 1,000 | $3.94 | $3,940.00 |
Drop-in alternatives for LTC3370IUH#TRPBF 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:
LTC3370IUH#PBF
β Drop-Inβ In Stock
$5.5 / Unit
View Datasheet βLTC3370IUH
β Drop-Inπ Reference alternative (not in catalog)
LTC3370IUH#TRPBF Maximum Ratings & Electrical Characteristics
| Function | Step-Down (Buck) |
| Output Configuration | Positive |
| Topology | Synchronous Buck |
| Number of Outputs | 4 |
| Output Type | Adjustable |
| Voltage - Input (Min) | 2.25 V |
| Voltage - Input (Max) | 5.5 V |
| Voltage - Output (Min/Fixed) | 0.8 V |
| Voltage - Output (Max) | 5.5 V |
| Current - Output | 2 A per channel (8A total) |
| Frequency - Switching | 1 MHz to 3 MHz |
| Synchronous Rectifier | Yes |
| Operating Temperature | -40Β°C to 125Β°C (junction) |
| Package / Case | 32-WFQFN Exposed Pad |
| Mounting Type | Surface Mount |
| Supplier Device Package | 32-QFN (5x5) |
| Base Product Number | LTC3370 |
LTC3370IUH#TRPBF Pin Configuration
| Pin 1 | SW1 β Switch node for channel 1 |
| Pin 2 | SW1 β Switch node for channel 1 |
| Pin 3 | VIN1 β Input supply for channel 1 |
| Pin 4 | VIN1 β Input supply for channel 1 |
| Pin 5 | GND β Ground |
| Pin 6 | GND β Ground |
| Pin 7 | SW2 β Switch node for channel 2 |
| Pin 8 | SW2 β Switch node for channel 2 |
| Pin 9 | VIN2 β Input supply for channel 2 |
| Pin 10 | VIN2 β Input supply for channel 2 |
| Pin 11 | GND β Ground |
| Pin 12 | GND β Ground |
| Pin 13 | SW3 β Switch node for channel 3 |
| Pin 14 | SW3 β Switch node for channel 3 |
| Pin 15 | VIN3 β Input supply for channel 3 |
| Pin 16 | VIN3 β Input supply for channel 3 |
| Pin 17 | GND β Ground |
| Pin 18 | GND β Ground |
| Pin 19 | SW4 β Switch node for channel 4 |
| Pin 20 | SW4 β Switch node for channel 4 |
| Pin 21 | VIN4 β Input supply for channel 4 |
| Pin 22 | VIN4 β Input supply for channel 4 |
| Pin 23 | GND β Ground |
| Pin 24 | GND β Ground |
| Pin 25 | C1 β Configuration pin 1 |
| Pin 26 | C2 β Configuration pin 2 |
| Pin 27 | C3 β Configuration pin 3 |
| Pin 28 | MODE/SYNC β Mode select / synchronization |
| Pin 29 | RT β Frequency programming resistor |
| Pin 30 | RUN β Enable pin |
| Pin 31 | VOUT1 β Output voltage sense for channel 1 |
| Pin 32 | VOUT2 β Output voltage sense for channel 2 |
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
LTC3370IUH#TRPBF is suitable for 6 applications: FPGA Power Supply, Processor Power, Industrial Multi-Rail Systems, Portable Battery-Powered Devices, Communications Equipment, Automotive Electronics.
FPGA Power Supply
The LTC3370IUH#TRPBF provides multiple low-voltage rails (e.g., 1.0V, 1.8V, 2.5V, 3.3V) for FPGA cores and I/O. Its configurable output currents (up to 8A total) match the varying load requirements of different FPGA rails. The high efficiency and small package make it ideal for space-constrained designs. With a 2.25V to 5.5V input, it can be powered from a 5V intermediate bus. The programmable switching frequency allows optimization for efficiency or component size. The device's synchronous rectification ensures high efficiency, reducing thermal stress. The pin-configurable outputs simplify design without external resistors. This makes the LTC3370 a versatile solution for FPGA power management.
Recommended
Processor Power
The LTC3370IUH#TRPBF can power multiple processor rails, such as core, I/O, and memory voltages. Its four channels can be configured to provide different currents, e.g., 2A for core, 2A for I/O, and 4A for memory. The input range of 2.25V to 5.5V suits battery-powered or 5V systems. The low quiescent current in Burst Mode extends battery life in portable devices. The device's fast transient response ensures stable operation during processor load changes. The small 5x5mm QFN package saves board space. The programmable frequency allows designers to avoid noise-sensitive frequency bands. Overall, it simplifies multi-rail processor power design.
Recommended
Industrial Multi-Rail Systems
In industrial systems, the LTC3370IUH#TRPBF provides multiple regulated rails for sensors, microcontrollers, and communication interfaces. Its wide input range (2.25V to 5.5V) allows operation from 3.3V or 5V supplies. The configurable outputs can be set to 1.8V, 2.5V, 3.3V, and 5V as needed. The device's robust protection features (overcurrent, thermal shutdown) ensure reliability in harsh environments. The -40Β°C to 125Β°C operating range meets industrial temperature requirements. The high efficiency reduces heat dissipation, enabling operation without active cooling. The small package is ideal for space-limited industrial PCBs. This makes the LTC3370 a practical choice for industrial power management.
Recommended
Portable Battery-Powered Devices
The LTC3370IUH#TRPBF is well-suited for portable devices powered by batteries, such as handheld instruments and IoT devices. Its input range of 2.25V to 5.5V covers single-cell Li-Ion (3.0V-4.2V) and 5V USB supplies. The low quiescent current (40uA in Burst Mode) extends battery life. The four channels can power different subsystems (e.g., MCU, RF, display) with individual voltage and current settings. The high efficiency (up to 95%) minimizes power loss, reducing heat and maximizing runtime. The small 5x5mm package fits compact designs. The programmable frequency allows optimization for efficiency or component size. This makes the LTC3370 ideal for battery-powered multi-rail applications.
Recommended
Communications Equipment
In communications equipment, the LTC3370IUH#TRPBF provides clean, regulated rails for FPGAs, DSPs, and transceivers. Its high PSRR and low output ripple ensure minimal noise interference in sensitive RF circuits. The configurable outputs can be set to 1.0V, 1.8V, 2.5V, and 3.3V as required. The device's synchronous rectification provides high efficiency, reducing thermal load in densely packed equipment. The programmable switching frequency allows designers to avoid interference with communication frequency bands. The small package is ideal for compact line cards and routers. The wide input range supports 5V backplane supplies. This makes the LTC3370 a reliable choice for communications power.
Recommended
Automotive Electronics
The LTC3370IUH#TRPBF is suitable for automotive electronics, such as infotainment systems, ADAS, and body control modules. It operates over the automotive temperature range (-40Β°C to 125Β°C) and can be powered from a 5V rail derived from the car battery. The four channels can provide different voltages for microcontrollers, sensors, and displays. The device's robust protection features ensure reliable operation in harsh automotive environments. The high efficiency reduces heat generation, important in enclosed automotive modules. The small package saves space in crowded PCBs. While not explicitly AEC-Q100 qualified, it meets the temperature requirements. This makes the LTC3370 a viable option for automotive power management.
Recommended
Engineering reference data for LTC3370IUH#TRPBF β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC3370IUH#PBF | LTC3370IUH | LTC3375EUK |
|---|---|---|---|---|
| Package | 32-WFQFN Exposed Pad | 32-WFQFN Exposed Pad | 32-WFQFN Exposed Pad | 24-QFN |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Outputs | 4 | 4 | 4 | 4 |
| Total Output Current | 8A | 8A | 8A | 8A |
| Input Voltage Range | 2.25V to 5.5V | 2.25V to 5.5V | 2.25V to 5.5V | 2.7V to 5.5V |
| Switching Frequency | 1MHz to 3MHz | 1MHz to 3MHz | 1MHz to 3MHz | 1MHz to 3MHz |
| Operating Temperature | -40Β°C to 125Β°C | -40Β°C to 125Β°C | -40Β°C to 125Β°C | -40Β°C to 125Β°C |
| Packaging | Tape & Reel | Tube | Bulk | Tape & Reel |
Key Differentiators
- Configurable output currents via pin-strapping (vs LTC3375EUK)
- Higher total output current (8A) (vs LTC3375EUK)
- Wider input voltage range (2.25V to 5.5V) (vs LTC3375EUK)
Design Notes
Ensure the exposed pad (pin 33) is soldered to a large copper area for thermal dissipation. Use multiple vias to connect the pad to the ground plane. Place input and output capacitors close to the respective pins to minimize parasitic inductance. For each channel, use a 10uF ceramic capacitor at the input and a 22uF ceramic capacitor at the output, as recommended in the datasheet.
The LTC3370 can deliver up to 8A total output current. Ensure the input supply can provide sufficient current without excessive voltage drop. Use low-ESR ceramic capacitors to handle the high ripple currents. The power dissipation is calculated as (VIN - VOUT) * IOUT per channel; for high current and large voltage differences, consider thermal management.
Do not exceed the absolute maximum input voltage of 6V. The configuration pins C1-C3 must be set correctly to achieve the desired output current combination; incorrect settings can cause improper operation. The RT pin must have a resistor to ground to set the switching frequency; leaving it floating may cause erratic behavior. Ensure the RUN pin is properly driven to enable the device.
Compliance Information
RoHS compliant per distributor listings. Not AEC-Q100 qualified, but suitable for automotive temperature range.
