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Analog Devices Inc. LTC3374AIUHF#PBF
- Part No.:
- LTC3374AIUHF#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 38-WFQFN Exposed Pad
- Datasheet:
-
LTC3374AIUHF#PBF.pdf
- Description:
- IC REG BUCK ADJ 1A 8OUT 38QFN
- Quantity:
- Payment:
- Shipping:
Inventory:983
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Product details
Overview
LTC3374AIUHF#PBF from Analog Devices is a multioutput power supply IC integrating eight synchronous 1A buck regulators, each powered by independent 2.25V–5.5V inputs, supporting parallel configurations up to 4A per channel with shared inductors. It delivers ±1% VFB accuracy on Buck 1, 1MHz–3MHz programmable switching frequency, and AEC-Q100 qualification for automotive systems requiring precise multichannel voltage regulation.
For engineers reviewing the LTC3374AIUHF#PBF datasheet, LTC3374AIUHF#PBF pinout, LTC3374AIUHF#PBF application, or LTC3374AIUHF#PBF equivalent, key selection criteria include independent VIN support per buck, master/slave configurability across 15 combinations, ±1% PGOOD accuracy, die temperature monitoring via TEMP pin, and thermal performance enabled by its 38-lead 5mm × 7mm QFN package with exposed GND pad.
Technical Context
The LTC3374AIUHF#PBF implements eight independent synchronous buck converters with phase-shifted 90° switching to reduce input ripple. Each regulator supports 0.8V to VIN output range and features precision enable thresholds (e.g., EN rising threshold = 400mV typ. for first regulator) enabling autonomous power-up sequencing without external controllers.
Its MODE pin selects between Burst Mode® operation (for light-load efficiency) and forced continuous mode across all channels. The RT pin programs oscillator frequency from 1MHz to 3MHz, while SYNC allows external clock synchronization with automatic slope compensation adaptation-critical for EMI-sensitive automotive and industrial applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulator Count | Eight independent synchronous 1A buck DC/DCs, configurable as 15 master/slave combinations up to 4A per group. |
| Input Voltage Range | 2.25V to 5.5V per VIN pin (VIN1–VIN8), enabling mixed-rail system integration. |
| Output Voltage Accuracy | ±1% on VFB for Buck 1; ±1.2% for Bucks 2–8-ensuring tight regulation for core logic and memory rails. |
| Switching Frequency | Programmable 1MHz–3MHz via RT resistor or external SYNC signal; default internal 2MHz clock. |
| Thermal Monitoring | TEMP pin outputs 220mV at 25°C with 7mV/°C slope-enables real-time die temperature tracking without external sensors. |
| Overvoltage Protection | Dedicated OV indicator triggers at 107.5% of regulated VOUT with 3% hysteresis-provides fail-safe rail monitoring. |
| AEC-Q100 Grade | Qualified for automotive applications over –40°C to +125°C junction temperature range. |
Pinout & Package
The LTC3374AIUHF#PBF is housed in a thermally enhanced 38-lead 5mm × 7mm plastic QFN package with exposed GND pad (Pin 39), requiring soldering to PCB ground plane for electrical integrity and thermal performance (θJA = 34°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB1–FB8 | Feedback inputs | Close regulation loop for each buck; FB2–FB8 tied to respective VIN enables master/slave paralleling. |
| VIN1–VIN8 | Independent input supplies | Accept separate 2.25V–5.5V rails-supports heterogeneous SoC subsystems or isolated domain powering. |
| SW1–SW8 | Switch nodes | Connect external inductors; phase-shifted 90° switching reduces input capacitor RMS current. |
| EN1–EN8 | Enable controls | Active-high logic with precision thresholds (e.g., 400mV rise) enables deterministic power sequencing. |
| PGOOD_ALL | Global power-good status | Open-drain output pulled low if any enabled buck falls outside 97–99% (Buck 1) or 94–96% (Bucks 2–8) of target VOUT. |
| MODE | Operating mode select | Low = Burst Mode® for high light-load efficiency; high = forced continuous mode for low-noise operation. |
| TEMP | Digital die temperature monitor | Outputs linear analog voltage (220mV @ 25°C, +7mV/°C) - enables thermal throttling or system-level diagnostics. |
| GND (Pin 39) | Power and thermal reference | Exposed pad must be soldered to PCB ground plane to meet θJA = 34°C/W and ensure safe 150°C max junction operation. |
Key Features
| Feature | Design Value |
|---|---|
| Eight-channel integration | Reduces board space and BOM count versus discrete buck solutions-ideal for compact ADAS ECUs and infotainment modules. |
| Configurable master/slave topology | Supports 15 distinct channel groupings (e.g., 4×2A, 2×4A) using shared inductors-lowers magnetics cost and improves current sharing accuracy. |
| Automated power sequencing | Precision EN thresholds (±20mV) eliminate need for external sequencers-simplifies design for multi-rail processors and FPGAs. |
| Real-time thermal monitoring | On-die TEMP pin provides direct die temperature readout-enables dynamic frequency scaling or fault logging without external components. |
| AEC-Q100 qualification | Validated for automotive use including extended temperature operation and robustness against ESD/transients-meets ISO 26262 functional safety readiness requirements. |
Applications
| ADAS Domain Controller Power | Automotive Infotainment SoC Rails |
|---|---|
Use Scenario: Powering vision processor, radar MCU, and sensor interface ICs within a centralized ADAS ECU requiring tightly regulated, independently sequenced voltages. IC Role / Device Role / Timing Role: Provides eight synchronized but individually controllable 1A buck rails-Buck 1–4 supply core CPU/GPU (0.8–1.2V), Buck 5–8 deliver I/O and peripheral voltages (1.8–3.3V). Use Value: Phase-shifted switching minimizes input ripple; ±1% VFB accuracy ensures stable operation under dynamic load transients typical of CNN inference workloads. | Use Scenario: Delivering multiple clean, low-noise power rails to an automotive-grade multimedia SoC with GPU, video decoder, and DDR interface. IC Role / Device Role / Timing Role: Acts as primary PMIC-Buck 1–2 supply core logic (0.85V/1.1V), Buck 3–4 feed DDR3L (1.35V), Buck 5–6 power audio codec (3.3V), Buck 7–8 drive display interface (1.8V/5V). Use Value: MODE pin enables forced continuous mode during video playback to suppress audible switching noise; PGOOD_ALL simplifies system-level power validation. |
| Industrial PLC I/O Module | Telematics Control Unit (TCU) |
Use Scenario: Supplying isolated field I/O circuitry (digital inputs, analog outputs, RS-485 transceivers) in harsh industrial environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Powers isolated DC-DC bias rails and signal conditioning stages-Buck 1–3 generate 5V/3.3V/2.5V for analog front-ends, Buck 4–6 supply isolated gate drivers, Buck 7–8 run microcontroller peripherals. Use Value: AEC-Q100 qualification ensures reliability at –40°C to +125°C; TEMP pin enables predictive maintenance by correlating die temperature with ambient stress conditions. | Use Scenario: Managing power for LTE/V2X modems, GNSS receivers, and secure boot MCUs in connected vehicle telematics units operating across global temperature zones. IC Role / Device Role / Timing Role: Delivers 1.1V core, 1.8V memory, 2.8V RF, and 3.3V interface rails-with Buck 1–2 paralleled for 2A modem core supply and Buck 3–4 for GNSS LNA bias. Use Value: Overvoltage indication prevents damage to sensitive RF front-ends during load dump events; RT-programmable frequency avoids interference with cellular band harmonics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3374AEUHF#PBF | Same silicon, commercial temperature grade (–40°C to +125°C), identical pinout and electrical specs. | Not qualified to AEC-Q100; unsuitable for automotive safety-critical systems. | Select when operating environment remains within commercial temp range and automotive qualification is not required. |
| MP2964GQ-10 | Four-channel 4A/phase buck controller (not integrated); requires external MOSFETs and gate drivers. | Targets higher-current applications (>4A/channel); lacks integrated power stages and TEMP monitoring. | Choose for custom high-efficiency designs where layout control and thermal optimization outweigh integration benefits. |
Compared with LTC3374AEUHF#PBF, the LTC3374AIUHF#PBF adds AEC-Q100 qualification and guaranteed performance over the full –40°C to +125°C junction range-essential for under-hood automotive deployment. Versus MP2964GQ-10, it trades external component flexibility for reduced design cycle time and proven thermal behavior in space-constrained modules.
Availability
LTC3374AIUHF#PBF is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, industrial PLC I/O modules, and telematics control units requiring stable component supply with long-term lifecycle assurance and AEC-Q100 compliance.
Supply support for LTC3374AIUHF#PBF 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 technologies, serving automotive, industrial, communications, and healthcare markets.
The LTC3374A product line delivers highly integrated, AEC-Q100-qualified multichannel power management ICs designed specifically for next-generation automotive electronics demanding compact size, precise regulation, and robust thermal management.
FAQ
What is the maximum output current achievable per channel using LTC3374AIUHF#PBF?
The LTC3374AIUHF#PBF supports up to 1A per individual buck regulator. When configured in master/slave mode, up to four channels can be paralleled to deliver up to 4A per output rail using a single inductor-verified in the datasheet's typical application circuits and efficiency curves for 2A, 3A, and 4A configurations.
Does LTC3374AIUHF#PBF support independent input voltage supplies for each buck channel?
Yes, LTC3374AIUHF#PBF accepts independent 2.25V to 5.5V inputs on VIN1 through VIN8-enabling heterogeneous power domain management, such as supplying different SoC subsystems from separate battery rails or intermediate converters without level-shifting.
How does the TEMP pin on LTC3374AIUHF#PBF function in system thermal management?
The TEMP pin on LTC3374AIUHF#PBF outputs a linear analog voltage (220mV at 25°C, +7mV/°C) proportional to die temperature-allowing microcontrollers to implement closed-loop thermal throttling, log junction temperature history, or trigger fault alerts before reaching the 170°C overtemperature shutdown threshold.
Can LTC3374AIUHF#PBF be synchronized to an external clock source?
Yes, LTC3374AIUHF#PBF supports external clock synchronization via the SYNC pin. Applying a 1MHz–3MHz square wave to SYNC forces all eight buck regulators to switch at that frequency with automatic slope compensation adjustment-critical for EMI compliance in automotive EMC testing.
What is the purpose of the PGOOD_ALL pin on LTC3374AIUHF#PBF?
The PGOOD_ALL pin on LTC3374AIUHF#PBF is an open-drain status output that goes LOW if any enabled buck regulator's output voltage falls below 94–99% (depending on channel) of its target or rises above 107.5%-providing a single-point system power validation signal for host processors or supervisory ICs.
LTC3374AIUHF#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 38-WFQFN Exposed Pad
- Packaging:
- Tube
- 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)
LTC3374AIUHF#PBF FAQ
1.How can I place an order for LTC3374AIUHF#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3374AIUHF#PBF 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 LTC3374AIUHF#PBF reliable?
The price and inventory of LTC3374AIUHF#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3374AIUHF#PBF is usually 5 days.
3.What payment methods are accepted for LTC3374AIUHF#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3374AIUHF#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3374AIUHF#PBF?
LTC3374AIUHF#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3374AIUHF#PBF 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 LTC3374AIUHF#PBF?
For technical support, including LTC3374AIUHF#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3374AIUHF#PBF requirements.
6.How does Aetrix verify that LTC3374AIUHF#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3374AIUHF#PBF 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 LTC3374AIUHF#PBF meets industry standards.
7.What is the process for return or replacement of LTC3374AIUHF#PBF?
All LTC3374AIUHF#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3374AIUHF#PBF, 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 LTC3374AIUHF#PBF part is unused and in its original packaging.
Return procedure for LTC3374AIUHF#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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