LTC3370EUH#TRPBF - 4-Ch 8A Configurable Buck DC/DC | Analog Devices
MPN: LTC3370EUH#TRPBF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.12 | $6.12 |
| 10 | $5.51 | $55.10 |
| 100 | $4.9 | $490.00 |
| 500 | $4.41 | $2,205.00 |
| 1,000 | $3.92 | $3,920.00 |
LTC3370EUH#TRPBF Overview
A configurable buck converter is a type of DC-DC step-down regulator that uses multiple internal power stages that can be combined to deliver higher current on fewer outputs. In the hierarchy of power management ICs, it sits above fixed-output regulators, offering flexibility in output count and current allocation. The LTC3370's architecture allows one to four outputs, each with up to 8A total, making it a versatile building block for systems requiring multiple low-voltage rails.
Key features include four synchronous buck converters with up to 8A total output current, 2.25V to 5.5V input range, adjustable output voltage down to 0.8V, and pin-configurable output current sharing. The device achieves high efficiency (up to 95%) by integrating low RDS(ON) switches and supports Burst Mode operation for light-load efficiency. It also includes soft-start, short-circuit protection, and thermal shutdown.
Technically, the LTC3370 uses a current-mode control architecture with a programmable switching frequency from 1MHz to 3MHz, allowing designers to trade off efficiency vs. component size. The C1-C3 pins set the configuration, and the MODE/SYNC pin allows external synchronization or Burst Mode. The device is available in a 32-lead WFQFN package with exposed pad for thermal management.
Typical applications include solid-state drives, FPGA/ASIC power supplies, optical modules, and industrial equipment where multiple low-voltage rails are needed. Its wide input range and high efficiency make it suitable for battery-powered devices and point-of-load regulation.
When designing with the LTC3370, ensure proper decoupling with 10µF ceramic capacitors on each input and output, and use the exposed pad for heat sinking. The switching frequency should be chosen to optimize efficiency and component size, and the C1-C3 pins must be set correctly for the desired output configuration.
Drop-in alternatives for LTC3370EUH#TRPBF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LTC3370EUH#TRPBF (same form factor and footprint) — differing in Package, Output Voltage Range, Switching Frequency, Maximum Output Current, Operating Temperature Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTC3370EUH#PBF
✅ Drop-In✓ In Stock
$7.15 / Unit
View Datasheet →LTC3370EUH
✅ Drop-In📋 Reference alternative (not in catalog)
LTC3370IUKG#TRPBF
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS65270
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS65270
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LTC3370EUH#TRPBF Maximum Ratings & Electrical Characteristics
| Function | Step-Down (Buck) |
| Output Configuration | Positive, Adjustable |
| Topology | Synchronous Buck |
| Number of Outputs | 4 |
| Output Current per Channel | 2A (max, configurable) |
| Total Output Current | 8A |
| Input Voltage Range | 2.25V to 5.5V |
| Output Voltage Range | 0.8V to 5.5V |
| Switching Frequency | 1MHz to 3MHz (programmable) |
| Synchronous Rectifier | Yes |
| Control Architecture | Current Mode |
| Package | 32-WFQFN Exposed Pad (5mm x 5mm) |
| Operating Temperature Range | -40°C to 125°C (junction) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
LTC3370EUH#TRPBF Pin Configuration
| Pin 1 | SW1 — Switch node for buck 1 |
| Pin 2 | PVIN1 — Power input for buck 1 |
| Pin 3 | PVIN2 — Power input for buck 2 |
| Pin 4 | SW2 — Switch node for buck 2 |
| Pin 5 | GND — Ground |
| Pin 6 | SW3 — Switch node for buck 3 |
| Pin 7 | PVIN3 — Power input for buck 3 |
| Pin 8 | PVIN4 — Power input for buck 4 |
| Pin 9 | SW4 — Switch node for buck 4 |
| Pin 10 | GND — Ground |
| Pin 11 | C1 — Configuration pin 1 |
| Pin 12 | C2 — Configuration pin 2 |
| Pin 13 | C3 — Configuration pin 3 |
| Pin 14 | MODE/SYNC — Mode select / external sync |
| Pin 15 | RT — Switching frequency set resistor |
| Pin 16 | RUN — Enable (active high) |
| Pin 17 | VIN — Input supply |
| Pin 18 | VOUT1 — Output voltage sense for buck 1 |
| Pin 19 | VOUT2 — Output voltage sense for buck 2 |
| Pin 20 | VOUT3 — Output voltage sense for buck 3 |
| Pin 21 | VOUT4 — Output voltage sense for buck 4 |
| Pin 22 | FB1 — Feedback for buck 1 |
| Pin 23 | FB2 — Feedback for buck 2 |
| Pin 24 | FB3 — Feedback for buck 3 |
| Pin 25 | FB4 — Feedback for buck 4 |
| Pin 26 | SS — Soft-start |
| Pin 27 | PGOOD — Power good indicator |
| Pin 28 | GND — Ground |
| Pin 29 | GND — Ground |
| Pin 30 | GND — Ground |
| Pin 31 | GND — Ground |
| Pin 32 | GND — Ground |
Typical Applications
LTC3370EUH#TRPBF is suitable for 6 applications: FPGA/ASIC Power Supplies, Solid-State Drives (SSD), Optical Modules, Industrial Equipment, Battery-Powered Devices, Point-of-Load (POL) Regulation.
FPGA/ASIC Power Supplies
The LTC3370EUH#TRPBF provides multiple configurable output rails (e.g., 1.0V core, 1.8V I/O, 2.5V auxiliary) from a single IC. Its 8A total current and adjustable outputs meet the sequencing and accuracy requirements of FPGAs. The high efficiency and small footprint reduce board space and thermal stress, making it ideal for compact designs.
Recommended
Solid-State Drives (SSD)
In SSDs, the LTC3370EUH#TRPBF powers the controller, NAND flash, and DRAM with separate low-voltage rails. Its 2.25V to 5.5V input range suits 3.3V or 5V supplies, and the configurable outputs allow optimal current allocation. The high efficiency extends battery life in portable SSDs, and the small package fits M.2 form factors.
Recommended
Optical Modules
The LTC3370EUH#TRPBF is used in optical transceivers to generate multiple low-noise rails for laser drivers, TIA, and digital control. Its low output ripple and high PSRR ensure clean power for sensitive analog circuits. The programmable switching frequency allows optimization for EMI, and the small package fits QSFP modules.
Recommended
Industrial Equipment
In industrial systems, the LTC3370EUH#TRPBF provides multiple rails for microcontrollers, sensors, and communication interfaces. Its wide input range (2.25V to 5.5V) accommodates 3.3V and 5V buses, and the -40°C to 125°C temperature range ensures reliability in harsh environments. The configurable outputs simplify power tree design.
Recommended
Battery-Powered Devices
The LTC3370EUH#TRPBF is ideal for battery-powered devices like portable instruments and IoT nodes. Its high efficiency (up to 95%) and Burst Mode operation extend battery life. The 2.25V to 5.5V input range supports single-cell Li-Ion or 3.3V/5V rails, and the small package minimizes PCB area.
Recommended
Point-of-Load (POL) Regulation
The LTC3370EUH#TRPBF serves as a POL regulator for digital ICs, providing local, low-noise supply rails close to the load. Its high efficiency reduces heat, and the programmable frequency allows optimization for efficiency or size. The multiple outputs can replace several discrete regulators, saving board space and cost.
Recommended
Recommended Products Summary
Engineering reference data for LTC3370EUH#TRPBF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC3370EUH#PBF | LTC3370EUH | LTC3370IUKG#TRPBF | TPS65270 |
|---|---|---|---|---|---|
| Package | 32-WFQFN Exposed Pad | 32-WFQFN Exposed Pad | 32-WFQFN Exposed Pad | 32-WFQFN Exposed Pad | 32-WFQFN Exposed Pad |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Number of Outputs | 4 | 4 | 4 | 4 | 2 |
| Total Output Current | 8A | 8A | 8A | 8A | 6A |
| Input Voltage Range | 2.25V to 5.5V | 2.25V to 5.5V | 2.25V to 5.5V | 2.25V to 5.5V | 4.5V to 18V |
| Switching Frequency | 1MHz to 3MHz | 1MHz to 3MHz | 1MHz to 3MHz | 1MHz to 3MHz | 300kHz to 2.2MHz |
| Operating Temperature Range | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C |
| Control Architecture | Current Mode | Current Mode | Current Mode | Current Mode | Current Mode |
Key Differentiators
- Four configurable outputs with up to 8A total current (vs TPS65270)
- Wide input voltage range (2.25V to 5.5V) (vs TPS65270)
- Pin-programmable configuration (vs TPS65270)
Design Notes
Place input and output capacitors close to the IC pins to minimize parasitic inductance. Use 10µF ceramic capacitors for each PVIN and VOUT. The exposed pad must be soldered to a large copper area for thermal dissipation. Follow the layout guidelines in the datasheet for optimal performance.
The LTC3370EUH#TRPBF can dissipate significant power at high output currents. Ensure adequate copper area on the PCB for heat sinking. The thermal resistance from junction to ambient (θJA) is typically 30°C/W with proper layout. For high ambient temperatures, consider airflow or a heatsink.
Set the C1-C3 pins correctly for the desired output configuration. Incorrect settings can lead to improper current sharing or output voltage errors. Also, ensure the RT resistor is within the specified range to set the switching frequency correctly. Do not leave the RUN pin floating; tie it to VIN if always enabled.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Lead-free packaging.
