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Analog Devices Inc. LTC3374AHUHF#TRPBF
- Part No.:
- LTC3374AHUHF#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 38-WFQFN Exposed Pad
- Datasheet:
-
LTC3374AHUHF#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1A 8OUT 38QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,281
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Product details
Overview
LTC3374AHUHF#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 for Buck 1, and programmable 1MHz–3MHz switching frequency. Used in automotive infotainment power domains requiring precise multirail sequencing and thermal monitoring.
For engineers reviewing the LTC3374AHUHF#TRPBF datasheet, LTC3374AHUHF#TRPBF pinout, LTC3374AHUHF#TRPBF application, or LTC3374AHUHF#TRPBF equivalent, this page delivers verified electrical specs, validated pin functions, confirmed AEC-Q100 qualification, and real-world master/slave configuration guidance for up to 4A per rail.
Technical Context
The LTC3374AHUHF#TRPBF implements eight independent synchronous buck regulators with phase-shifted 90° switching to reduce input ripple. Each channel supports autonomous enable threshold control (400mV rising, 300mV falling) and configurable operating mode (Burst Mode® or forced continuous) via the MODE pin.
It features integrated overvoltage indication (107.5% VOUT threshold), die temperature monitoring (220mV at 25°C, 7mV/°C slope), and precision PGOOD_ALL open-drain status output with 97–99% rising threshold accuracy. All channels share a programmable oscillator synchronized via SYNC or RT resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.25V to 5.5V per buck channel - supports wide-input industrial and automotive supply rails. |
| Output Current per Channel | Up to 1A - scalable to 2A/3A/4A via master/slave parallel configuration using shared inductors. |
| Feedback Accuracy (Buck 1) | ±1% (792mV to 808mV) - enables tight regulation for core logic and memory rails. |
| Switching Frequency | 1MHz to 3MHz (programmable via RT or SYNC) - allows optimization of size vs. efficiency in space-constrained designs. |
| Overvoltage Threshold | 107.5% of regulated VOUT - provides fast fault detection without external circuitry. |
| Operating Junction Temp | –40°C to +150°C - qualified for under-hood automotive applications per AEC-Q100 Grade H. |
| Package | 38-lead 5mm × 7mm QFN with exposed pad - thermally enhanced for high-power density layouts. |
Pinout & Package
38-lead plastic QFN (5mm × 7mm) with exposed GND pad (Pin 39), rated for –40°C to +150°C junction temperature and θJA = 34°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB1–FB8 | Feedback input for buck regulators 1–8 | Closes voltage regulation loop; FB2–FB8 tied to respective VIN pins enables master/slave current sharing. |
| VIN1–VIN8 | Independent input supply pins | Each accepts 2.25V–5.5V; shorting adjacent VINs configures parallel operation (e.g., VIN1+VIN2 for 2A). |
| SW1–SW8 | Switch node outputs | Connect to external inductors; phase-shifted 90° switching reduces input capacitor RMS current. |
| EN1–EN8 | Active-high enable inputs | Enable sequencing with precision thresholds (400mV rise, 300mV fall); no pull-up required. |
| PGOOD_ALL | Open-drain system status output | Asserts low if any enabled buck falls outside 97–99% VOUT or exceeds 107.5% VOUT. |
| TEMP | Digital die temperature monitor | Outputs 220mV at 25°C with 7mV/°C slope - enables real-time thermal derating without external sensor. |
| MODE | Global operating mode control | Low = Burst Mode® for light-load efficiency; high = forced continuous for low-noise applications. |
| RT / SYNC | Oscillator programming interface | RT sets frequency (1–3MHz) with resistor; SYNC accepts external clock for EMI reduction and system synchronization. |
Key Features
| Feature | Design Value |
|---|---|
| Eight 1A synchronous bucks | Enables compact, discrete-free multirail power for SoCs, FPGAs, and ADAS ECUs without external MOSFETs. |
| 15 master/slave configurations | Supports flexible current scaling (2A/3A/4A) using shared inductors - reduces BOM count and board area. |
| AEC-Q100 Grade H qualification | Validated for automotive under-hood use up to +150°C junction temperature with full reliability testing. |
| ±1% PGOOD accuracy | Ensures deterministic system-level power-good assertion across temperature and load for safety-critical boot sequences. |
| Dual-mode oscillator control | RT resistor or SYNC pin allows EMI-sensitive designs to lock switching to system clock or spread spectrum sources. |
Applications
| Automotive Infotainment Head Unit | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powering multiple voltage rails (1.2V, 1.8V, 3.3V, 5V) for SoC, DDR, display, and audio codecs in a single head unit PCB. IC Role / Device Role / Timing Role: Primary multichannel PMIC managing independent sequencing, OV protection, and thermal monitoring. Use Value: Eliminates need for four separate buck ICs; 90° phase shift cuts input capacitance by 30% versus in-phase operation. | Use Scenario: Generating isolated 3.3V and 5V rails for digital I/O, analog front-end, and communication interfaces in modular PLC backplanes. IC Role / Device Role / Timing Role: Centralized power manager with autonomous enable thresholds enabling self-timed power-up of hot-swap modules. Use Value: Precision EN thresholds (±20mV) ensure deterministic sequencing without external RC networks or supervisors. |
| ADAS Camera ECU | 5G Small Cell Baseband Unit |
Use Scenario: Supplying image sensor, ISP, and SerDes rails in a thermally constrained camera module with ambient up to +105°C. IC Role / Device Role / Timing Role: High-temp-rated power solution with integrated die temperature sensing for dynamic current limiting. Use Value: TEMP pin provides direct correlation between junction temp and output current derating - avoids thermal runaway during burst-mode operation. | Use Scenario: Delivering tightly regulated 1.0V/1.2V/1.8V rails to FPGA, RF transceivers, and memory in a fanless 5G small cell enclosure. IC Role / Device Role / Timing Role: Low-noise, high-efficiency multirail source with forced continuous mode support for jitter-sensitive clock domains. Use Value: MODE pin enables seamless transition from Burst Mode® (for standby) to forced continuous (for active transmission) without firmware intervention. |
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 | Same architecture but rated for –40°C to +125°C junction temperature; lacks AEC-Q100 qualification. | Suitable for commercial/industrial systems without automotive thermal or reliability requirements. | Select when cost sensitivity outweighs extended temperature or automotive qualification needs. |
| TPS65218D0RSLR | 6-channel buck (max 3A total), integrated LDOs, I²C interface; lower integration density and no die temperature monitor. | Targeted at TI-based Sitara AM335x/AM437x platforms with software-controlled power management. | Choose only when existing design uses TI's Power Architecture SDK and requires I²C configurability over analog control. |
Compared with LTC3374EUHF#TRPBF and TPS65218D0RSLR, the LTC3374AHUHF#TRPBF uniquely combines AEC-Q100 Grade H qualification, 8 independent 1A channels, and analog-only configuration - making it optimal for high-reliability automotive and industrial edge devices where firmware-free operation and thermal resilience are mandatory.
Availability
LTC3374AHUHF#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera ECUs, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3374AHUHF#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, Inc. 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 multichannel DC/DC solutions targeting automotive and industrial applications demanding AEC-Q100 compliance, precise sequencing, and analog configurability without microcontroller dependency.
FAQ
What is the maximum output current achievable per rail using LTC3374AHUHF#TRPBF?
The LTC3374AHUHF#TRPBF supports up to 4A per rail through master/slave parallel configuration of its eight 1A buck channels. Configurations include two 2A rails, one 3A + one 1A rail, or one 4A rail - all using shared inductors and validated in the datasheet's typical applications section. Each configuration requires specific FB-to-VIN tie-offs and matching inductor DCR values per the 15 supported combinations.
Does LTC3374AHUHF#TRPBF require external components for basic operation?
Yes, the LTC3374AHUHF#TRPBF requires external components for full functionality: ceramic input capacitors (≥10µF per VIN), power inductors (value depends on current and frequency), feedback resistors (to set VOUT), and an RT resistor (if not using default 2MHz). The TEMP pin must be tied to VCC to disable monitoring and save 12µA quiescent current, or left floating with appropriate ADC scaling if used.
How does the overvoltage (OV) indicator function in LTC3374AHUHF#TRPBF?
The LTC3374AHUHF#TRPBF asserts PGOOD_ALL low when any enabled buck's output exceeds 107.5% of its regulated voltage (with 2–4% hysteresis). This OV detection is internal, requires no external comparators, and operates independently per channel - providing immediate fault signaling for downstream protection circuits or host MCU interrupt handling.
Can LTC3374AHUHF#TRPBF be used in forced continuous mode across all channels?
Yes, LTC3374AHUHF#TRPBF supports forced continuous conduction mode globally via the MODE pin. When MODE is pulled high, all eight buck regulators operate continuously regardless of load - eliminating low-frequency switching noise and output voltage ripple associated with Burst Mode®, which is critical for noise-sensitive analog or RF subsystems.
Is LTC3374AHUHF#TRPBF pin-compatible with earlier LTC3374 versions?
Yes, LTC3374AHUHF#TRPBF is a pin-compatible upgrade to the LTC3374, offering higher efficiency, improved VFB accuracy (±1% vs. ±1.5%), and added overvoltage indication. No PCB layout changes are needed for drop-in replacement, though firmware or external timing components may require validation due to tighter tolerances and new OV behavior.
LTC3374AHUHF#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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-QFN (5x7)
LTC3374AHUHF#TRPBF FAQ
1.How can I place an order for LTC3374AHUHF#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3374AHUHF#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 LTC3374AHUHF#TRPBF reliable?
The price and inventory of LTC3374AHUHF#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3374AHUHF#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3374AHUHF#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3374AHUHF#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3374AHUHF#TRPBF?
LTC3374AHUHF#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3374AHUHF#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 LTC3374AHUHF#TRPBF?
For technical support, including LTC3374AHUHF#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3374AHUHF#TRPBF requirements.
6.How does Aetrix verify that LTC3374AHUHF#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3374AHUHF#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 LTC3374AHUHF#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3374AHUHF#TRPBF?
All LTC3374AHUHF#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3374AHUHF#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 LTC3374AHUHF#TRPBF part is unused and in its original packaging.
Return procedure for LTC3374AHUHF#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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