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Analog Devices Inc. LTC3374AHFE#TRPBF
- Part No.:
- LTC3374AHFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3374AHFE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1A 8OUT 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,508
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Product details
Overview
LTC3374AHFE#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 and 0.8V–VIN output range, ±1% VFB accuracy for Buck 1, and an overvoltage (OV) indicator. It supports master-slave configurations up to 4A per channel using shared inductors and is used in automotive infotainment power domains requiring tight voltage regulation and thermal monitoring.
For engineers reviewing the LTC3374AHFE#TRPBF datasheet, LTC3374AHFE#TRPBF pinout, LTC3374AHFE#TRPBF application, or LTC3374AHFE#TRPBF equivalent, key selection criteria include its 38-lead TSSOP package with exposed pad, –40°C to 150°C operating junction temperature, programmable 1MHz–3MHz oscillator, and precision enable thresholds enabling autonomous power-up sequencing in multirail systems.
Technical Context
The LTC3374AHFE#TRPBF implements eight independent synchronous buck regulators with integrated PMOS/NMOS power stages, where each channel features adjustable output via external resistor divider on FBx pins and supports phase-shifted switching (90° increments) to reduce input ripple. Its MODE pin globally selects between Burst Mode® (for light-load efficiency) and forced continuous conduction mode.
Thermal management is enabled by the TEMP pin, delivering a calibrated 220mV ±20mV at 25°C with 7mV/°C slope, while PGOOD_ALL provides open-drain fault signaling across all enabled channels. The device supports synchronization to external clocks or RT-resistor-programmed frequencies, and includes overtemperature shutdown at 170°C with 10°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.25V to 5.5V per buck channel - enables direct connection to common system rails like 3.3V or 5V without pre-regulation. |
| Output Voltage Range | 0.8V to VIN per channel - supports core voltages down to sub-1V for modern SoCs and FPGAs. |
| VFB Accuracy (Buck 1) | ±1% - ensures precise regulation critical for CPU/GPU core supplies where <±15mV error is required at 1.5V. |
| Switching Frequency | 1MHz to 3MHz (programmable via RT) - allows optimization of inductor size vs. efficiency trade-off in space-constrained designs. |
| Operating Temperature | –40°C to +150°C junction - qualified for under-hood automotive applications per AEC-Q100 Grade H. |
| Package | 38-lead TSSOP with exposed pad - provides low thermal resistance (θJA = 25°C/W) and compatibility with standard PCB assembly processes. |
| Overvoltage Threshold | 107.5% ±1.5% of regulated VOUT - protects downstream loads from catastrophic overvoltage events during transient faults. |
Pinout & Package
Package: 38-lead plastic TSSOP with exposed thermal pad (Pin 39 = GND). Exposed pad must be soldered to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1–EN8 | Active-high enable inputs | Enable individual buck regulators; precision thresholds (e.g., EN1 rising = 400mV typ.) support autonomous sequencing without external supervisors. |
| FB1–FB8 | Feedback inputs | Close regulation loop; connecting FBx to VIN(x+1) configures master-slave pairing for higher current (e.g., FB2→VIN2 combines Buck1+Buck2). |
| SW1–SW8 | Switch node outputs | Drive external inductors; require low-ESR ceramic output capacitors and proper layout to minimize EMI and voltage spikes. |
| VIN1–VIN8 | Independent input supplies | Allow separate power domains (e.g., isolated 3.3V and 5V rails), reducing cross-talk and improving fault containment. |
| PGOOD_ALL | Open-drain fault indicator | Asserts low if any enabled buck falls outside PGOOD window (94–99% VOUT) or exceeds OV threshold (106–109% VOUT). |
| TEMP | Digital die temperature monitor | Outputs linear analog voltage (220mV @ 25°C, +7mV/°C) - enables real-time thermal derating or fan control without external sensor. |
| MODE | Global operation mode select | Low = Burst Mode® (ultra-low IQ); high = forced continuous mode (fixed frequency, lower noise, better transient response). |
| RT | Oscillator frequency programming | Resistor-to-ground sets fSW from 1MHz to 3MHz; tie to VCC for default 2MHz - eliminates need for external clock source. |
Key Features
| Feature | Design Value |
|---|---|
| Eight 1A synchronous bucks | Enables compact, discrete-free multirail power for complex SoCs - eliminates need for eight separate buck ICs or large multi-phase controllers. |
| Master-slave configurability | Supports 15 distinct combinations (e.g., 4×2A, 2×4A) using shared inductors - reduces BOM count, board area, and magnetic component cost. |
| ±1% PGOOD accuracy | Ensures reliable system-level power-good assertion for processors/FPGAs requiring strict supply validation before boot. |
| Die temperature monitor | Provides direct junction temperature feedback (220mV ±20mV @ 25°C, 7mV/°C) - enables closed-loop thermal management without external sensors. |
| AEC-Q100 Grade H qualification | Validated for automotive under-hood operation up to 150°C junction - meets reliability and stress-test requirements for ADAS and infotainment ECUs. |
Applications
| Automotive Infotainment Power | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powering multiple voltage domains (e.g., 1.2V CPU core, 1.8V GPU, 3.3V interface, 5V USB) in head-unit systems with thermal constraints. IC Role / Device Role / Timing Role: Multichannel buck regulator providing independent, sequenced, and monitored DC/DC conversion. Use Value: Reduces component count by consolidating eight regulators into one AEC-Q100-qualified package, lowering system cost and improving thermal predictability. | Use Scenario: Supplying isolated sensor interfaces, microcontroller cores, communication transceivers, and analog front-ends in modular industrial controllers. IC Role / Device Role / Timing Role: Centralized multirail power manager with autonomous enable sequencing and fault reporting. Use Value: Eliminates external sequencing ICs and discrete regulators, simplifying design while maintaining ±1% output accuracy across all rails. |
| Telecom Baseband Unit | Medical Imaging FPGA Power |
Use Scenario: Delivering tightly regulated, low-noise supplies to FPGAs, ADCs, DACs, and RF front-end bias circuits in 5G small cells. IC Role / Device Role / Timing Role: High-efficiency, phase-shifted buck array minimizing input capacitor RMS current and EMI. Use Value: Achieves >90% efficiency at 1A load with 2.25V input, extending uptime in fanless telecom enclosures. | Use Scenario: Powering radiation-tolerant FPGAs and high-speed data acquisition ASICs in portable ultrasound and MRI subsystems. IC Role / Device Role / Timing Role: Precision multirail regulator with overvoltage protection and thermal monitoring for safety-critical diagnostics. Use Value: OV indicator and PGOOD_ALL provide fail-safe detection of rail faults, meeting IEC 62304 Class C software safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3374AEFE#TRPBF | Same functionality and pinout, but rated for –40°C to +125°C junction temperature (Grade E vs. H). | Suitable for commercial/industrial environments without extended thermal requirements. | Select when ambient temperature stays below 105°C and AEC-Q100 is not required. |
| TPS65270PWP | 6-channel 2A/1.5A buck (TI); no die temperature monitor, no OV indicator, fixed 2.2MHz fSW, no RT programming. | Lacks thermal monitoring and overvoltage protection; limited configurability for master-slave topologies. | Choose only if system requires fewer rails and does not mandate automotive-grade thermal monitoring or fault coverage. |
Compared with LTC3374AEFE#TRPBF and TPS65270PWP, the LTC3374AHFE#TRPBF uniquely delivers AEC-Q100 Grade H qualification, integrated die temperature sensing, and programmable overvoltage detection - making it the only option among the three suitable for safety-critical automotive power domains requiring full thermal and fault visibility.
Availability
LTC3374AHFE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLCs, and medical imaging systems requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant performance.
Supply support for LTC3374AHFE#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 space-constrained, high-reliability applications such as automotive ADAS, industrial automation, and telecom infrastructure.
FAQ
What is the maximum output current achievable per channel using LTC3374AHFE#TRPBF?
The LTC3374AHFE#TRPBF supports up to 1A per individual buck channel. When configured in master-slave topology (e.g., combining two or four channels), it achieves up to 2A or 4A per output rail using a single shared inductor. Current limits scale with configuration: 1.4A (1-buck), 3.6A (2-buck), 5.4A (3-buck), or 7.2A (4-buck), as specified in the datasheet's ILIM parameter table.
Does LTC3374AHFE#TRPBF support synchronization to an external clock?
Yes, the LTC3374AHFE#TRPBF supports external clock synchronization via the SYNC pin. Driving SYNC with a clean CMOS clock signal (1MHz–3MHz, tLOW/tHIGH > 40ns) synchronizes all eight buck regulators to that frequency. Slope compensation is automatically adjusted, ensuring stable operation without manual tuning.
How is thermal monitoring implemented on LTC3374AHFE#TRPBF?
The LTC3374AHFE#TRPBF implements thermal monitoring through the TEMP pin, which outputs a linear analog voltage: 220mV (typical) at 25°C with a slope of 7mV/°C. This allows direct measurement of die temperature using a single ADC input. Connecting TEMP to VCC disables the monitor and saves ~12µA of VCC quiescent current.
What is the purpose of the MODE pin on LTC3374AHFE#TRPBF?
The MODE pin on LTC3374AHFE#TRPBF selects global operating mode for all eight buck regulators: logic low enables Burst Mode® operation (optimized for light-load efficiency), while logic high forces continuous conduction mode (improved transient response and lower output ripple). This eliminates need for per-channel mode control.
Can LTC3374AHFE#TRPBF be used in non-automotive applications?
Yes, the LTC3374AHFE#TRPBF is fully functional in industrial, medical, and telecom applications. Its –40°C to +150°C junction rating, high accuracy, and robust fault protection make it suitable for harsh environments beyond automotive use - though its AEC-Q100 qualification specifically validates reliability for automotive deployment.
LTC3374AHFE#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
LTC3374AHFE#TRPBF FAQ
1.How can I place an order for LTC3374AHFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3374AHFE#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 LTC3374AHFE#TRPBF reliable?
The price and inventory of LTC3374AHFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3374AHFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3374AHFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3374AHFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3374AHFE#TRPBF?
LTC3374AHFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3374AHFE#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 LTC3374AHFE#TRPBF?
For technical support, including LTC3374AHFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3374AHFE#TRPBF requirements.
6.How does Aetrix verify that LTC3374AHFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3374AHFE#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 LTC3374AHFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3374AHFE#TRPBF?
All LTC3374AHFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3374AHFE#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 LTC3374AHFE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3374AHFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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