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Analog Devices Inc. LTC3374AEUHF#TRPBF
- Part No.:
- LTC3374AEUHF#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 38-WFQFN Exposed Pad
- Datasheet:
-
LTC3374AEUHF#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1A 8OUT 38QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,488
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Product details
Overview
LTC3374AEUHF#TRPBF from Analog Devices is a high-accuracy, 8-channel parallelable 1A synchronous buck DC/DC regulator IC. It integrates eight independent 1A buck converters, each with 2.25V–5.5V input range, ±1% VFB accuracy on Buck 1, and programmable 1MHz–3MHz switching frequency. Used in multichannel power management for automotive infotainment SoCs requiring tightly regulated core, I/O, and peripheral rails.
For engineers reviewing the LTC3374AEUHF#TRPBF datasheet, LTC3374AEUHF#TRPBF pinout, LTC3374AEUHF#TRPBF application, or LTC3374AEUHF#TRPBF equivalent, key selection criteria include per-channel enable control, master/slave configurability up to 4A, die temperature monitoring via TEMP pin, ±1% PGOOD accuracy, and AEC-Q100 qualification for automotive use.
Technical Context
The LTC3374AEUHF#TRPBF implements eight independent synchronous buck regulators sharing a common oscillator architecture, with phase-shifted 90° switching to reduce input ripple. Each channel features internal PMOS/NMOS power stages, precision feedback comparators, and dedicated EN pins enabling autonomous power-up sequencing.
Operating mode (Burst Mode® vs forced continuous) is globally controlled via the MODE pin, while output voltage is set by external resistor dividers on FB1–FB8. The device supports flexible configuration: channels may operate independently or be combined in 15 master/slave groupings (e.g., 2×2A, 4×1A, or single 4A) using shared inductors and VIN/FB interconnections.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulator Count | 8 independent synchronous buck regulators, configurable as 1A×8, 2A×4, 3A×2+2A×1, or 4A×2 |
| Input Voltage Range | 2.25V to 5.5V per channel - supports direct connection to diverse system rails (e.g., 3.3V, 5V, or battery-derived supplies) |
| Output Voltage Accuracy | ±1% on Buck 1 (VFB = 800mV ±4mV); ±2% on Bucks 2–8 (VFB = 800mV ±16mV) |
| Switching Frequency | Programmable 1MHz–3MHz via RT resistor or external SYNC signal; default 2MHz internal oscillator |
| Current Limit | 1.4A (1-buck), 3.6A (3-buck), 5.4A (4-buck) - enables safe parallel operation with defined overcurrent protection |
| Thermal Monitoring | TEMP pin outputs 220mV at 25°C with 7mV/°C slope - provides real-time die temperature for thermal derating or fault logging |
| PGOOD Accuracy | ±1% threshold (97–99% of VOUT) with 0.5–1.5% hysteresis - ensures reliable power-good assertion across load and temperature |
Pinout & Package
Package: 38-lead 5mm × 7mm plastic QFN with exposed pad (UHF package). Exposed pad must be soldered to PCB ground plane for thermal and electrical performance (θJA = 34°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB1–FB8 | Feedback input for buck regulators 1–8 | Connects to resistor divider midpoint; sets output voltage (VOUT = 0.8V × (1 + R1/R2)) |
| VIN1–VIN8 | Independent input supply for each buck | Each accepts 2.25V–5.5V; bypassed with ≥10µF ceramic capacitor; shorted to combine channels |
| SW1–SW8 | Switch node for buck power stage | Connects to external inductor; carries high di/dt switching current; requires low-inductance layout |
| EN1–EN8 | Active-high enable for individual bucks | Enables autonomous sequencing; threshold 380–420mV rising, 300–340mV falling |
| MODE | Global operating mode select | Low = Burst Mode® (light-load efficiency); High = forced continuous (low-noise, fixed-frequency) |
| TEMP | Digital die temperature monitor output | Analog voltage (220mV @ 25°C, +7mV/°C) - used for thermal management without external sensor |
| PGOOD_ALL | Open-drain composite power-good indicator | Asserts low if any enabled buck falls outside ±1% PGOOD window or exceeds 107.5% overvoltage threshold |
| RT | Oscillator frequency programming | Resistor-to-ground sets fSW; tie to VCC for default 2MHz; supports synchronization via SYNC pin |
Key Features
| Feature | Design Value |
|---|---|
| Eight 1A synchronous buck regulators | Reduces board area and BOM count vs discrete solutions; eliminates need for external MOSFET drivers or controllers |
| 15 master/slave configurations up to 4A | Enables scalable current delivery (e.g., 4A CPU core rail) using shared inductors and minimal layout changes |
| ±1% VFB accuracy on Buck 1 | Ensures tight regulation for critical rails (e.g., SoC core voltage), minimizing margining and improving system stability |
| AEC-Q100 qualified (Grade I: –40°C to +125°C) | Validated for automotive applications including ADAS ECUs and infotainment systems without additional qualification effort |
| 90° phase-shifted switching | Reduces RMS input capacitor ripple current by ~30% vs in-phase operation, lowering required capacitance and EMI filtering |
| Overvoltage (OV) indicator with 107.5% threshold | Provides early fault detection for output overvoltage events (e.g., feedback resistor open), enhancing system safety |
Applications
| Automotive Infotainment SoC Power | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powering multiple voltage domains (core, GPU, memory, USB PHY) in a single-chip automotive infotainment processor. IC Role / Device Role / Timing Role: Multichannel PMIC providing independent, sequenced, and monitored DC/DC conversion for heterogeneous SoC subsystems. Use Value: Eliminates six discrete buck ICs; achieves <1% output error on core rail; supports AEC-Q100 compliance out-of-box. | Use Scenario: Supplying isolated 3.3V, 5V, and 12V rails for digital I/O, analog sensors, and communication interfaces in modular PLC backplanes. IC Role / Device Role / Timing Role: Centralized power manager delivering configurable, thermally monitored, and fault-flagged outputs across distributed modules. Use Value: Enables hot-swap capability via per-rail enable control; TEMP pin allows predictive maintenance; PGOOD_ALL simplifies system-level power validation. |
| Communications Baseband Processor | Medical Imaging Sensor Array |
Use Scenario: Generating low-noise, tightly regulated supplies for RF transceivers, ADCs, and DSP cores in 5G small-cell baseband units. IC Role / Device Role / Timing Role: Precision power source with forced continuous mode (via MODE pin) and phase-shifting to minimize conducted EMI into sensitive analog sections. Use Value: Achieves >90% efficiency at 500mA load (VIN=3.3V, VOUT=1.8V); reduces input ripple by 30% vs non-phased design. | Use Scenario: Powering high-resolution CMOS image sensor arrays requiring ultra-stable bias voltages and thermal derating during long-exposure acquisition. IC Role / Device Role / Timing Role: Thermally aware multirail supply with real-time die temperature reporting (TEMP pin) and overvoltage protection for sensor pixel integrity. Use Value: Prevents thermal runaway via closed-loop derating; OV detection avoids sensor latch-up; ±1% PGOOD ensures valid frame capture timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3374EUHF#TRPBF | Non-AEC-Q100 version; same pinout, specs, and functionality but rated for 0°C to 85°C junction temperature | Suitable for commercial/industrial applications without automotive qualification requirements | Select when automotive temperature range (–40°C to +125°C) and AEC-Q100 are not required; lower cost and broader availability |
| TPS65218D0RSLR | 6-channel buck (max 3A total), integrated LDOs, PMIC for AM335x/AM437x; no die temperature monitor or 4A parallel capability | Targeted at TI Sitara processors; lacks independent VIN per channel and master/slave flexibility | Choose only for TI ecosystem designs where integrated LDOs and processor-specific sequencing are prioritized over scalability and thermal visibility |
Compared with LTC3374EUHF#TRPBF, the LTC3374AEUHF#TRPBF adds AEC-Q100 qualification and extended temperature support, while TPS65218D0RSLR trades channel independence and thermal monitoring for tighter SoC integration - making LTC3374AEUHF#TRPBF optimal for scalable, thermally managed, automotive-grade multirail systems.
Availability
LTC3374AEUHF#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLCs, communications baseband units, and medical imaging equipment requiring stable component supply, AEC-Q100 compliance, and multichannel power management.
Supply support for LTC3374AEUHF#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC3374A product line delivers highly integrated, thermally robust, and AEC-Q100-qualified multichannel DC/DC regulators designed specifically for automotive and high-reliability embedded systems demanding precise voltage regulation and flexible current scalability.
FAQ
What is the maximum output current achievable with the LTC3374AEUHF#TRPBF?
The LTC3374AEUHF#TRPBF supports up to 4A per output rail by combining four of its eight 1A buck regulators in master/slave configuration using a shared inductor. This is achieved through dedicated FB/VIN interconnects and validated current-sharing circuitry, with specified current limits of 5.4A for four-buck operation. Individual channels remain limited to 1A unless explicitly configured in parallel.
Does the LTC3374AEUHF#TRPBF require external components for basic operation?
Yes, the LTC3374AEUHF#TRPBF requires external components for full functionality: one inductor and two resistors (for feedback divider) per active buck channel, plus ≥10µF ceramic input capacitors on each VIN pin and a resistor on the RT pin to set switching frequency. The TEMP pin may be tied to VCC to disable thermal monitoring and save 12µA quiescent current.
How does the LTC3374AEUHF#TRPBF handle thermal management?
The LTC3374AEUHF#TRPBF integrates a die temperature monitor (TEMP pin) outputting 220mV at 25°C with a 7mV/°C slope, enabling real-time thermal tracking. It also features overtemperature shutdown at 170°C (10°C hysteresis) and requires soldering of its exposed pad to a PCB ground plane for thermal dissipation (θJA = 34°C/W in QFN package).
Can the LTC3374AEUHF#TRPBF be synchronized to an external clock?
Yes, the LTC3374AEUHF#TRPBF supports external synchronization via the SYNC pin. Driving SYNC with a clean clock signal (1MHz–3MHz, tLOW/tHIGH > 40ns) synchronizes all eight buck regulators to that frequency. Slope compensation is automatically adjusted, and the internal oscillator is disabled - eliminating beat frequencies and easing EMI filter design.
What is the purpose of the MODE pin on the LTC3374AEUHF#TRPBF?
The MODE pin on the LTC3374AEUHF#TRPBF selects global operating mode: logic low enables Burst Mode® operation for highest light-load efficiency (e.g., <100µA IQ), while logic high forces continuous conduction mode across all enabled bucks for low-noise, constant-frequency operation - critical for noise-sensitive analog or RF circuits.
LTC3374AEUHF#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 38-WFQFN 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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-QFN (5x7)
LTC3374AEUHF#TRPBF FAQ
1.How can I place an order for LTC3374AEUHF#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3374AEUHF#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 LTC3374AEUHF#TRPBF reliable?
The price and inventory of LTC3374AEUHF#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3374AEUHF#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3374AEUHF#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3374AEUHF#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3374AEUHF#TRPBF?
LTC3374AEUHF#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3374AEUHF#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 LTC3374AEUHF#TRPBF?
For technical support, including LTC3374AEUHF#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3374AEUHF#TRPBF requirements.
6.How does Aetrix verify that LTC3374AEUHF#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3374AEUHF#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 LTC3374AEUHF#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3374AEUHF#TRPBF?
All LTC3374AEUHF#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3374AEUHF#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 LTC3374AEUHF#TRPBF part is unused and in its original packaging.
Return procedure for LTC3374AEUHF#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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