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Analog Devices Inc. LTC3374AEFE#TRPBF
- Part No.:
- LTC3374AEFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3374AEFE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1A 8OUT 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,644
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Product details
Overview
LTC3374AEFE#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 (Buck 1), and programmable 1MHz–3MHz switching frequency. It supports master-slave configurations up to 4A per channel using shared inductors and is used in multichannel power supplies for automotive infotainment and industrial control systems.
For engineers reviewing the LTC3374AEFE#TRPBF datasheet, LTC3374AEFE#TRPBF pinout, LTC3374AEFE#TRPBF application, or LTC3374AEFE#TRPBF equivalent, key selection criteria include its 38-lead TSSOP package, ±1% PGOOD accuracy, die temperature monitor output, AEC-Q100 qualification, and support for autonomous power-up sequencing via precision enable thresholds.
Technical Context
The LTC3374AEFE#TRPBF implements eight independent synchronous buck regulators with phase-shifted 90° switching to reduce input ripple. Each channel features integrated PMOS/NMOS power switches with RDS(ON) of 205mΩ/125mΩ (PMOS/NMOS at VIN = 5.0V), programmable soft-start (0.25–3ms), and selectable operating mode (Burst Mode® or forced continuous) via the MODE pin.
It supports flexible configuration: channels may operate independently or combine into 15 master-slave groupings (e.g., 2×2A, 3×3A, 4×4A) using shared inductors and FB-to-VIN interconnections. Overvoltage indication (107.5% VOUT) and overtemperature shutdown (170°C) provide fault protection, while the TEMP pin delivers a calibrated 220mV @ 25°C with 7mV/°C slope for real-time die temperature monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulator Count | Eight independent synchronous buck regulators, configurable as 1A × 8 or combined into 2A/3A/4A outputs |
| Input Voltage Range | 2.25V to 5.5V per channel - enables use with diverse rail sources including Li-ion, USB PD, and 3.3V/5V system supplies |
| Output Voltage Accuracy | ±1% on VFB for Buck 1 (792–808mV), ±1.6% for Bucks 2–8 (784–816mV) - ensures tight regulation across load/temperature |
| Switching Frequency | Programmable 1MHz–3MHz via RT resistor or external SYNC signal - allows optimization of size vs. efficiency vs. EMI |
| PGOOD Accuracy | ±1% threshold (97–99% VOUT for Buck 1; 94–96% for Bucks 2–8) - enables reliable power-good signaling for sequenced systems |
| Overvoltage Detection | 107.5% nominal VOUT with 3% hysteresis - provides fast, accurate overvoltage fault flagging without external circuitry |
| Thermal Protection | Overtemperature shutdown at 170°C with 10°C hysteresis - prevents permanent damage during sustained overload |
Pinout & Package
The LTC3374AEFE#TRPBF is housed in a thermally enhanced 38-lead plastic TSSOP package with exposed pad (Pin 39 = GND). The package measures standard TSSOP dimensions and requires soldering of the exposed pad to PCB ground for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1–EN8 | Active-high enable inputs | Independent control of each buck; precision thresholds (380–420mV rising) simplify autonomous sequencing |
| FB1–FB8 | Feedback inputs | Close regulation loop; FB2–FB8 tied to respective VIN pins to configure master-slave combinations |
| VIN1–VIN8 | Independent input supplies | Each buck powered from separate 2.25V–5.5V source - enables mixed-rail architectures |
| SW1–SW8 | Switch node outputs | Drive external inductors; phase-shifted 90° switching reduces input capacitor RMS current |
| PGOOD_ALL | Open-drain status output | Asserts low if any enabled buck falls below PGOOD threshold or exceeds OV threshold |
| TEMP | Analog temperature monitor | Outputs 220mV @ 25°C + 7mV/°C - enables real-time die temp readback without sensor |
| MODE | Operating mode select | Low = Burst Mode® for light-load efficiency; high = forced continuous for low-noise operation |
| RT | Oscillator programming | Resistor-to-ground sets frequency; tie to VCC for default 2MHz internal clock |
Key Features
| Feature | Design Value |
|---|---|
| Eight 1A synchronous bucks | Enables compact, high-density multirail power delivery without discrete controllers or external MOSFETs |
| 15 master-slave configurations | Supports scalable output currents (2A/3A/4A) using shared inductors - reduces BOM count and board area |
| AEC-Q100 qualified | Rated for automotive applications (-40°C to +125°C junction), including infotainment and ADAS subsystems |
| Dual-mode operation (Burst/FCM) | Optimizes efficiency across full load range: >90% at 1mA, >92% at 1A (VIN=3.3V, VOUT=1.8V) |
| Integrated die temperature monitor | Eliminates need for external thermal sensors; enables closed-loop thermal management in firmware |
| Phased 90° switching | Reduces input ripple current by ~30% vs. in-phase operation - lowers required input capacitance |
Applications
| Automotive Infotainment Power | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powering multiple voltage rails (1.2V CPU core, 1.8V memory, 3.3V interface, 5V peripherals) in head-unit SoC designs. 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; AEC-Q100 rating and overvoltage/overtemperature protection meet automotive functional safety requirements. | Use Scenario: Generating isolated 3.3V, 5V, and 12V rails for digital I/O, analog sensing, and communication interfaces in modular PLC backplanes. IC Role / Device Role / Timing Role: Centralized, configurable power manager enabling flexible rail assignment and dynamic reconfiguration via enable pins. Use Value: Reduces component count by 70% vs. discrete solutions; phase-shifted switching minimizes conducted EMI in noise-sensitive measurement circuits. |
| Communications Baseband Unit | Medical Imaging Sensor Array |
Use Scenario: Supplying tightly regulated, low-noise 1.0V, 1.2V, and 1.8V rails to FPGA, ADCs, and RF transceivers in 5G small-cell baseband boards. IC Role / Device Role / Timing Role: High-accuracy, low-ripple multirail supply with programmable frequency to avoid interference with RF bands. Use Value: ±1% VFB and <100mV transient deviation ensure signal integrity; forced continuous mode eliminates burst noise in sensitive analog paths. | Use Scenario: Powering distributed CMOS image sensor arrays requiring precise 1.2V, 2.5V, and 3.3V rails with simultaneous startup and thermal derating. IC Role / Device Role / Timing Role: Thermally aware power controller delivering synchronized, temperature-compensated outputs. Use Value: Integrated TEMP pin enables real-time thermal throttling of sensor bias rails - improves SNR stability across ambient temperature swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3374IUHF#TRPBF | Same functionality but in 38-lead 5mm × 7mm QFN package; θJA = 25°C/W vs. 34°C/W for TSSOP | Better thermal performance in space-constrained layouts; requires different PCB footprint and reflow profile | Select for higher power density or improved thermal dissipation; verify layout compatibility with QFN land pattern |
| TPS65270PWP | Triple-output buck (3A/2A/2A); no multi-channel flexibility, no die temp monitor, no AEC-Q100 rating | Targeted at single-board computing; lacks 8-channel granularity and automotive qualification | Choose only when fewer rails suffice and automotive compliance is not required; lower integration for simpler designs |
Compared with LTC3374IUHF#TRPBF, the LTC3374AEFE#TRPBF offers identical electrical performance in a TSSOP package optimized for legacy assembly lines and manual inspection, while TPS65270PWP provides lower channel count but higher per-rail current - making it suitable only for non-automotive, lower-complexity applications.
Availability
LTC3374AEFE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC I/O modules, and communications baseband units requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LTC3374AEFE#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, configurable multichannel DC/DC power management ICs designed for space-constrained, thermally demanding applications where reliability, accuracy, and automotive qualification are critical.
FAQ
What is the maximum output current achievable per channel using LTC3374AEFE#TRPBF?
The LTC3374AEFE#TRPBF supports up to 1A per individual buck regulator. When configured in master-slave groups, it achieves up to 4A per output using shared inductors - for example, combining four 1A channels yields a 4A rail with single-inductor topology. Current limits scale with channel count: 1.8A (2×), 3.6A (3×), and 5.4A (4×) typical PMOS current limit values are specified.
Does LTC3374AEFE#TRPBF support synchronization to an external clock?
Yes, the LTC3374AEFE#TRPBF supports external clock synchronization via the SYNC pin. Driving SYNC with a clean TTL/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 does the TEMP pin on LTC3374AEFE#TRPBF function, and what is its accuracy?
The TEMP pin on LTC3374AEFE#TRPBF outputs a calibrated analog voltage: 220mV at 25°C with a slope of 7mV/°C (typical). This provides direct die temperature readback with ±5°C accuracy over –40°C to +125°C. To disable the monitor and save ~12µA quiescent current, tie TEMP to VCC.
Can LTC3374AEFE#TRPBF be used in automotive applications, and what qualifications does it hold?
Yes, the LTC3374AEFE#TRPBF is AEC-Q100 qualified for automotive applications (Grade I: –40°C to +125°C junction temperature). It meets stress test requirements for temperature cycling, humidity, and ESD, and is specifically designated for use in infotainment, body electronics, and ADAS subsystems where reliability under harsh conditions is mandatory.
What is the purpose of the MODE pin on LTC3374AEFE#TRPBF, and how does it affect efficiency?
The MODE pin selects between Burst Mode® operation (MODE = low) for ultra-low quiescent current (<1µA per disabled buck) and forced continuous conduction mode (MODE = high) for low-noise, constant-frequency operation. At light loads, Burst Mode® improves efficiency to >85% (vs. ~60% in FCM), while FCM maintains tighter output voltage regulation and lower ripple.
LTC3374AEFE#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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-TSSOP-EP
LTC3374AEFE#TRPBF FAQ
1.How can I place an order for LTC3374AEFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3374AEFE#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 LTC3374AEFE#TRPBF reliable?
The price and inventory of LTC3374AEFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3374AEFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3374AEFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3374AEFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3374AEFE#TRPBF?
LTC3374AEFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3374AEFE#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 LTC3374AEFE#TRPBF?
For technical support, including LTC3374AEFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3374AEFE#TRPBF requirements.
6.How does Aetrix verify that LTC3374AEFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3374AEFE#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 LTC3374AEFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3374AEFE#TRPBF?
All LTC3374AEFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3374AEFE#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 LTC3374AEFE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3374AEFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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