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Analog Devices Inc. LTC3374EFE#TRPBF
- Part No.:
- LTC3374EFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3374EFE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1A 8OUT 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,904
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Product details
Overview
LTC3374EFE#TRPBF from Analog Devices (formerly Linear Technology) is an 8-channel synchronous buck DC/DC regulator IC with independent 1A per channel capability, programmable 1MHz–3MHz switching frequency, precision enable thresholds (±30mV), and die temperature monitoring. It supports master-slave parallel configurations up to 4A per output using shared inductors and operates from 2.25V–5.5V input supplies per channel - ideal for multirail power management in FPGA, ASIC, and SoC-based industrial control systems.
For engineers reviewing the LTC3374EFE#TRPBF datasheet, LTC3374EFE#TRPBF pinout, LTC3374EFE#TRPBF application, or LTC3374EFE#TRPBF equivalent, key selection criteria include per-channel VIN independence, 0.8V–VIN output range, thermal-aware operation via TEMP pin, phase-shifted 90° switching for EMI reduction, and precise autonomous power-up sequencing enabled by dual-threshold EN pins.
Technical Context
The LTC3374EFE#TRPBF integrates eight fully independent synchronous buck regulators, each with internal PMOS/NMOS power stages (300mΩ RDS(ON) typ.), fixed-frequency or externally synchronized operation, and configurable Burst Mode™ or forced continuous PWM mode via a single MODE pin. All channels share a common oscillator architecture with RT-resistor programming or SYNC input.
Each buck stage features dedicated VIN, SW, FB, and EN pins, enabling flexible rail assignment and independent enable/disable control. Parallel configuration is implemented by connecting FBx to VINy (e.g., FB2 to VIN1), allowing up to four converters to combine into a single 4A output with shared inductor and current sharing - validated by IFWD4 = 9.2A typical current limit under combined operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel count | 8 independent 1A synchronous buck regulators |
| Input voltage range | 2.25V to 5.5V per channel - supports mixed-supply system rails |
| Output voltage range | 0.8V to VIN - enables low-voltage core logic and I/O supply generation |
| Switching frequency | 1MHz to 3MHz (programmable via RT resistor or external SYNC signal) |
| Feedback reference | 800mV ±20mV - enables accurate output regulation across temperature |
| Enable threshold | 400mV rising / 340mV falling (typ.) - ensures reliable sequencing without external bias |
| Die temperature monitor | 150mV at 25°C, 6.75mV/°C slope - provides direct junction temperature readout |
| Thermal shutdown | 165°C with 10°C hysteresis - protects against sustained overtemperature conditions |
Pinout & Package
The LTC3374EFE#TRPBF is housed in a thermally enhanced 38-lead plastic TSSOP package (5mm × 7mm footprint, exposed pad). The exposed pad (Pin 39) must be soldered to a PCB ground plane for electrical integrity and thermal performance (θJA = 25°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1–EN8 | Per-channel enable inputs | Active-high logic; precision thresholds support autonomous power sequencing |
| FB1–FB8 | Per-channel feedback inputs | Connect to resistor divider; shorting FBx to VINy configures master-slave parallel operation |
| VIN1–VIN8 | Per-channel input supplies | Independent 2.25V–5.5V inputs - enables heterogeneous rail sourcing |
| SW1–SW8 | Per-channel switch nodes | Drive external inductors; phase-shifted 90° switching reduces input ripple |
| PGOOD_ALL | Global power-good indicator | Open-drain output asserting LOW if any enabled output deviates >7.5% from target |
| TEMP | Digital die temperature sensor output | Analog voltage proportional to junction temperature (150mV @ 25°C, +6.75mV/°C) |
| MODE | Global operating mode control | LOW = Burst Mode™ (light-load efficiency); HIGH = forced continuous PWM (low-noise) |
| SYNC / RT | Oscillator control interface | SYNC accepts external clock; RT sets frequency via resistor (1–3MHz range) |
| VCC | Internal bias supply | 2.7V–5.5V input powering internal circuitry; requires ≥10µF ceramic bypass |
| GND (exposed pad) | Power and signal ground | Exposed thermal pad must be soldered to PCB ground plane for thermal and electrical performance |
Key Features
| Feature | Design Value |
|---|---|
| 8-channel 1A buck integration | Reduces board area vs discrete solutions; eliminates inter-channel timing mismatches |
| Configurable parallel operation | Up to 4A per output using shared inductor - simplifies high-current rail design |
| Phase-shifted 90° switching | Minimizes input capacitor RMS current and conducted EMI across all channels |
| Precision enable thresholds | ±30mV tolerance enables robust, self-timed power-up without external sequencers |
| Integrated die temperature monitor | Eliminates need for external thermal sensors; enables real-time thermal margining |
| Two-mode regulation control | Burst Mode™ extends battery life; forced continuous mode ensures low-noise operation |
Applications
| FPGA Core & I/O Power | Automotive ADAS Domain Controller |
|---|---|
Use Scenario: Powering heterogeneous voltage domains (e.g., 0.85V core, 1.2V memory, 1.8V I/O) on Xilinx Kintex Ultrascale+ FPGA. IC Role / Device Role / Timing Role: Single-chip multirail buck controller delivering independent, sequenced, and monitored outputs. Use Value: Eliminates 7–8 discrete buck ICs; reduces BOM count, layout complexity, and thermal hotspots while maintaining per-rail fault reporting. |
Use Scenario: Supplying multiple subsystems (camera ISP, radar processor, CAN transceiver, display driver) in Tier-1 ADAS ECU. IC Role / Device Role / Timing Role: Centralized, AEC-Q200-aligned power manager with thermal awareness and fail-safe PGOOD_ALL reporting. Use Value: Enables ASIL-B compliant power monitoring via die temperature tracking and rail-specific enable/disable control. |
| Industrial PLC CPU Module | 5G Small Cell Baseband Unit |
Use Scenario: Providing isolated 3.3V, 2.5V, 1.8V, and 1.2V rails for ARM Cortex-A53 CPU, DDR3L, Ethernet PHY, and field I/O interfaces. IC Role / Device Role / Timing Role: High-density, thermally robust power solution supporting wide ambient temperature range (–40°C to 125°C). Use Value: Maintains stable regulation across industrial temperature extremes with <1% load/line regulation and integrated thermal derating. |
Use Scenario: Generating tightly regulated, low-noise rails (e.g., 1.0V RF DAC, 1.8V ADC, 3.3V SerDes) in compact 5G mmWave small cell units. IC Role / Device Role / Timing Role: Multichannel buck regulator with forced continuous mode for ultra-low output ripple and phase-coordinated switching. Use Value: Achieves <10mVpp ripple at 1A load via synchronized 2MHz operation and 90° phase shift - critical for RF signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ8875A-10 from Monolithic Power Systems | 4-channel, 3A/channel; no per-channel VIN independence; no die temperature monitor | Suitable for simpler, lower-channel-count designs where thermal monitoring is not required | Select when needing higher per-channel current and lower channel count, but sacrificing rail flexibility and thermal visibility |
| TPS650861 from Texas Instruments | 6-channel PMIC with integrated LDOs; fixed 1.8V/3.3V/5V outputs; no programmable FB range or parallel configuration | Targeted at Intel Atom/Celeron platforms with predefined rail requirements | Choose for x86-based embedded systems requiring preconfigured power trees and companion LDOs |
Compared with MPQ8875A-10 and TPS650861, the LTC3374EFE#TRPBF uniquely delivers 8 independently configurable 1A buck channels with per-rail VIN, full 0.8V–VIN output adjustability, and integrated die temperature sensing - making it optimal for custom, thermally constrained, multirail FPGA/ASIC designs.
Availability
LTC3374EFE#TRPBF is available at Aetrix Electronics and suitable for FPGA power delivery, automotive ADAS domain controllers, and industrial PLC CPU modules requiring stable component supply, long-term lifecycle support, and guaranteed –40°C to 125°C operation.
Supply support for LTC3374EFE#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices acquired Linear Technology in 2017 and maintains its high-performance analog and power management portfolio with rigorous reliability testing and automotive-grade qualification.
The LTC3374EFE#TRPBF belongs to Linear's high-density multichannel DC/DC regulator family, designed specifically for space-constrained, thermally demanding applications in industrial, automotive, and communications infrastructure where rail independence and thermal visibility are critical.
FAQ
What is the maximum output current achievable per channel using LTC3374EFE#TRPBF?
The LTC3374EFE#TRPBF supports up to 1A per individual buck channel. When configured in master-slave parallel mode - by connecting FB2 to VIN1, FB3 to VIN2, etc. - up to four channels can be combined to deliver up to 4A per output. The datasheet specifies IFWD4 = 9.2A typical current limit for four combined channels, confirming robust 4A capability with proper thermal design and shared inductor selection.
Does LTC3374EFE#TRPBF support independent input voltages for each channel?
Yes, the LTC3374EFE#TRPBF supports fully independent input supplies for each of its eight buck channels, with each VIN1–VIN8 rated for 2.25V to 5.5V. This allows heterogeneous rail sourcing - for example, powering Channel 1 from a 3.3V supply and Channel 2 from a 5V supply - without inter-channel coupling or mandatory supply matching.
How does the TEMP pin on LTC3374EFE#TRPBF function in system thermal management?
The TEMP pin on LTC3374EFE#TRPBF outputs an analog voltage proportional to die temperature: 150mV at 25°C with a slope of 6.75mV/°C. This enables direct junction temperature measurement without external sensors. System firmware can use this signal for dynamic thermal throttling, lifetime derating calculations, or early overtemperature warning before the 165°C shutdown threshold is reached.
Can LTC3374EFE#TRPBF operate with different switching frequencies across channels?
No - all eight buck channels of the LTC3374EFE#TRPBF share a common oscillator. Frequency is set globally via the RT pin (resistor-programmed) or SYNC pin (external clock), or defaults to 2MHz. This ensures deterministic phase relationships (90° offset per channel) and consistent EMI behavior, but prevents per-channel frequency tuning.
What is the purpose of the PGOOD_ALL pin on LTC3374EFE#TRPBF?
The PGOOD_ALL pin on LTC3374EFE#TRPBF is an open-drain status output that asserts LOW whenever the regulated output voltage of *any* enabled buck channel deviates more than 7.5% below its programmed value. It remains LOW when all regulators are disabled. This single-pin global fault indicator simplifies system-level power health monitoring and enables coordinated reset or shutdown sequences.
LTC3374EFE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 8
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 1A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-TSSOP-EP
LTC3374EFE#TRPBF FAQ
1.How can I place an order for LTC3374EFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3374EFE#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC3374EFE#TRPBF reliable?
The price and inventory of LTC3374EFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3374EFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3374EFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3374EFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3374EFE#TRPBF?
LTC3374EFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3374EFE#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC3374EFE#TRPBF?
For technical support, including LTC3374EFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3374EFE#TRPBF requirements.
6.How does Aetrix verify that LTC3374EFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3374EFE#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC3374EFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3374EFE#TRPBF?
All LTC3374EFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3374EFE#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC3374EFE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3374EFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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