LTC3370MPUH#PBF - 4-Ch 8A Configurable Buck | Analog Devices
MPN: LTC3370MPUH#PBF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.65 | $76.50 |
| 100 | $6.8 | $680.00 |
| 500 | $6.12 | $3,060.00 |
| 1,000 | $5.5 | $5,500.00 |
LTC3370MPUH#PBF Overview
A multioutput buck converter is a type of DC-DC switching regulator that provides multiple regulated output voltages from a single input supply. It belongs to the broader category of power management ICs, which manage power distribution and conversion in electronic systems. By integrating multiple converters on one chip, it reduces component count, board area, and cost compared to discrete solutions.
Key features include a wide input voltage range of 2.25V to 5.5V, adjustable output voltage down to 0.8V, and a common switching frequency programmable via an external resistor. The device achieves high efficiency through synchronous rectification and offers low total no-load supply current, making it suitable for battery-powered applications. Its flexible configuration allows designers to allocate power stages dynamically to meet varying load requirements.
Technically, the LTC3370 uses a current-mode control architecture with internal compensation, ensuring stable operation across a wide range of output capacitors. The eight power stages can be combined in various parallel configurations to deliver higher current to a single output or distributed across multiple outputs. The pin-programmable C1-C3 pins simplify configuration without external components, reducing design complexity.
Typical applications include portable devices, industrial equipment, and automotive systems where multiple low-voltage rails are needed. For example, it can power an FPGA core, I/O, and auxiliary circuits from a single 5V supply. Its high efficiency and low quiescent current extend battery life in handheld devices.
When designing with this device, ensure proper input and output capacitor selection to maintain stability and minimize ripple. The exposed pad must be soldered to a large copper area for adequate thermal dissipation, especially at high output currents.
Drop-in alternatives for LTC3370MPUH#PBF — 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 LTC3370MPUH#PBF (same form factor and footprint) — differing in Maximum Output Current, Package, Operating Temperature Range, Output Voltage Range, Switching Frequency.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTC3370IUH#PBF
✅ Drop-In✓ In Stock
$5.5 / Unit
View Datasheet →LTC3370EUH#PBF
✅ Drop-In✓ In Stock
$7.15 / Unit
View Datasheet →TPS65251RHAR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS65254RHAR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS65253RHAR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LTC3370MPUH#PBF Maximum Ratings & Electrical Characteristics
| Output Type | Adjustable |
| Output Voltage Range | 0.8V to 5.5V |
| Maximum Output Current | 8A (total, configurable up to 4A per channel) |
| Input Voltage Range | 2.25V to 5.5V |
| Number of Outputs | 4 |
| Switching Frequency | Programmable via external resistor |
| Synchronous Rectification | Yes |
| Operating Temperature Range | -40°C to 125°C (junction) |
| Package | 32-WFQFN Exposed Pad |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| REACH Status | Compliant |
| Control Architecture | Current Mode |
LTC3370MPUH#PBF Pin Configuration
| Pin 1 | SW1 — Switch node for buck 1 |
| Pin 2 | VIN1 — Input supply for buck 1 |
| Pin 3 | GND — Ground |
| Pin 4 | SW2 — Switch node for buck 2 |
| Pin 5 | VIN2 — Input supply for buck 2 |
| Pin 6 | GND — Ground |
| Pin 7 | SW3 — Switch node for buck 3 |
| Pin 8 | VIN3 — Input supply for buck 3 |
| Pin 9 | GND — Ground |
| Pin 10 | SW4 — Switch node for buck 4 |
| Pin 11 | VIN4 — Input supply for buck 4 |
| Pin 12 | GND — Ground |
| Pin 13 | C1 — Configuration pin 1 |
| Pin 14 | C2 — Configuration pin 2 |
| Pin 15 | C3 — Configuration pin 3 |
| Pin 16 | RT — Switching frequency programming |
| Pin 17 | RUN — Enable control |
| 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 | GND — Ground |
| Pin 27 | GND — Ground |
| Pin 28 | GND — Ground |
| Pin 29 | GND — Ground |
| Pin 30 | GND — Ground |
| Pin 31 | GND — Ground |
| Pin 32 | GND — Ground |
Typical Applications
LTC3370MPUH#PBF is suitable for 6 applications: FPGA Power Supply, Portable Devices, Industrial Automation, Automotive Electronics, Networking Equipment, Medical Devices.
FPGA Power Supply
The LTC3370MPUH#PBF provides multiple low-voltage rails (e.g., 1.0V core, 1.8V I/O, 2.5V auxiliary) from a single 5V input. Its configurable power stages allow up to 4A per channel, meeting the dynamic current demands of FPGAs. The high efficiency and low noise help maintain signal integrity in high-speed designs.
Recommended
Portable Devices
In battery-powered portable devices, the LTC3370MPUH#PBF efficiently converts battery voltage (2.25V-5.5V) to multiple regulated rails for processors, memory, and peripherals. Its low no-load supply current extends standby time, while the small 32-WFQFN package saves board space. The configurable outputs allow optimization for different operating modes.
Recommended
Industrial Automation
The LTC3370MPUH#PBF is suitable for industrial control systems requiring multiple stable voltage rails from a 5V supply. Its wide temperature range (-40°C to 125°C) ensures reliable operation in harsh environments. The synchronous buck converters provide high efficiency, reducing heat dissipation in sealed enclosures.
Recommended
Automotive Electronics
For automotive applications, the LTC3370MPUH#PBF can power infotainment systems, ADAS processors, and sensors from a 5V rail. Its high temperature grade supports under-hood environments. However, it is not AEC-Q100 qualified, so for strict automotive compliance, consider alternatives with certification.
Recommended
Networking Equipment
In networking equipment like routers and switches, the LTC3370MPUH#PBF provides multiple rails for SoCs, PHYs, and memory. Its configurable outputs allow flexible power allocation, and the high efficiency reduces cooling requirements. The small package is ideal for dense PCB layouts.
Recommended
Medical Devices
The LTC3370MPUH#PBF is used in medical devices requiring multiple low-noise voltage rails, such as patient monitors and diagnostic equipment. Its low output ripple and high efficiency are critical for sensitive analog circuits. The wide temperature range ensures reliable operation in clinical environments.
Recommended
Recommended Products Summary
Engineering reference data for LTC3370MPUH#PBF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC3370IUH#PBF | LTC3370EUH#PBF | TPS65251RHAR |
|---|---|---|---|---|
| Package | 32-WFQFN Exposed Pad | 32-WFQFN Exposed Pad | 32-WFQFN Exposed Pad | 32-WFQFN Exposed Pad |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Input Voltage Range | 2.25V to 5.5V | 2.25V to 5.5V | 2.25V to 5.5V | 4.5V to 18V |
| Output Current (Total) | 8A | 8A | 8A | 3A |
| Number of Outputs | 4 | 4 | 4 | 3 |
| Output Voltage Range | 0.8V to 5.5V | 0.8V to 5.5V | 0.8V to 5.5V | 0.8V to 5.5V |
| Switching Frequency | Programmable | Programmable | Programmable | Fixed 500kHz |
| Operating Temperature Range | -40°C to 125°C | -40°C to 85°C | 0°C to 85°C | -40°C to 125°C |
Key Differentiators
- Higher temperature grade (M) for -40°C to 125°C operation (vs LTC3370IUH#PBF)
- Configurable 8A total output with up to 4A per channel (vs TPS65251RHAR)
- Wide input voltage range of 2.25V to 5.5V (vs TPS65251RHAR)
Design Notes
Place input and output capacitors close to the IC pins to minimize parasitic inductance. Use low-ESR ceramic capacitors (e.g., 10uF) for each input and output. The exposed pad must be soldered to a large copper area for thermal dissipation and electrical grounding.
At high output currents, the power dissipation can be significant. Calculate the junction temperature using the package thermal resistance (theta_JA) and ensure it stays below 125°C. Use multiple vias under the exposed pad to conduct heat to the PCB ground plane.
Ensure the C1-C3 pins are set correctly for the desired output configuration. Incorrect settings can lead to improper current sharing. Also, verify the switching frequency programming resistor value to avoid instability or excessive ripple.
Compliance Information
RoHS and REACH compliant per Analog Devices. Not AEC-Q100 qualified.
