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Analog Devices Inc. LTC3374AEFE
- Part No.:
- LTC3374AEFE
- Manufacturer:
- Analog Devices Inc.
- Package:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3374AEFE.pdf
- Description:
- IC REG BUCK ADJ 1A 8OUT 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,814
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Product details
Overview
LTC3374AEFE from Analog Devices is a configurable 8-channel, 2.25 V to 5.5 V input PMIC integrating eight 1 A synchronous buck power stages, supporting up to eight independent outputs or fewer higher-current rails via internal stage paralleling; delivers up to 8 A total output current with ±1% output voltage accuracy and 95% peak efficiency; used in automotive infotainment and industrial control systems requiring flexible, low-voltage multirail power.
For engineers reviewing the LTC3374AEFE datasheet, LTC3374AEFE pinout, LTC3374AEFE application, or LTC3374AEFE equivalent, this page provides verified configuration options, thermal performance data, real-world sequencing behavior, and validated alternative parts for multirail power design under space-constrained, high-reliability conditions.
Technical Context
The LTC3374AEFE implements eight independent 1 A buck power stages controlled by four configurable regulators, each capable of driving one or more stages in parallel using pin-strappable CFG0–CFG3 inputs; supports 15 distinct current configurations (e.g., 8×1 A, 4×2 A, 2×4 A) without external compensation.
It operates from 2.25 V to 5.5 V input, delivers output voltages from 0.8 V to VIN, uses internal BST capacitors (no external BST required), and features integrated die temperature monitoring (TEMP pin), power-good signaling per channel (PGOOD1–PGOOD4), and current monitoring (IMON1–IMON4) with analog proportional output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.25 V to 5.5 V - supports single-cell Li-ion, USB PD, and industrial 3.3 V/5 V rails without external boost/buck pre-regulation. |
| Total Output Current | Up to 8 A - achieved via configurable paralleling of eight 1 A stages across 1–4 outputs; enables scalable rail count vs. current trade-off. |
| Output Voltage Accuracy | ±1% - ensures stable core logic and memory supply under load transients and temperature variation in FPGA/microcontroller applications. |
| Peak Efficiency | 95% - minimizes thermal rise in sealed enclosures such as automotive dashboards and medical handhelds. |
| Switching Frequency | 1 MHz to 3 MHz - allows use of small, low-profile inductors (e.g., 0.47 µH–2.2 µH) and reduces EMI in noise-sensitive RF subsystems. |
| Quiescent Current | 28 µA (1 channel active) - extends battery life in always-on system monitors and low-power wake-up circuits. |
| Operating Junction Temp | –40°C to +125°C - qualified for under-hood automotive and industrial edge computing environments. |
Pinout & Package
Package: 38-lead QFN (5 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINA–VIND | Input voltage supplies for channels A–D | Independent inputs allow rail isolation and mixed-source operation (e.g., VINA = 3.3 V, VIND = 5 V). |
| SWA–SWH | Switch node outputs for 8 buck stages | Direct connection to external inductors; layout-critical nodes requiring short, low-inductance traces. |
| FB1–FB4 | Feedback inputs for channels A–D | Resistor-divider inputs setting output voltage; support 0.8 V minimum with ±1% accuracy. |
| PGOOD1–PGOOD4 | Power-good status indicators | Open-drain outputs asserting low when corresponding channel output deviates >7.5% from target. |
| IMON1–IMON4 | Current monitor outputs | Analog voltage (100 mV/A) proportional to average channel load current; enables real-time thermal derating. |
| CFG0–CFG3 | Configuration select inputs | Binary-coded pins selecting one of 15 current configurations; pulled high/low to set stage allocation per channel. |
| TEMP | Digital die temperature monitor | Analog voltage output (10 mV/°C) enabling system-level thermal throttling without external sensor. |
| RT | Frequency programming | Resistor-to-ground sets switching frequency from 1 MHz to 3 MHz; optimizes efficiency vs. size trade-off. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable 8-stage architecture | Enables 15 fixed current allocations (e.g., 8×1 A, 4×2 A, 2×4 A) via hardware strapping-no firmware or I²C required. |
| Integrated BST capacitors | Eliminates 8 external boost capacitors, reducing BOM count and PCB area while improving reliability over wire-bonded alternatives. |
| Per-channel IMON and PGOOD | Supports independent rail health monitoring and dynamic current limiting in safety-critical systems like ADAS ECUs. |
| Dual-mode operation (Burst/Forced PWM) | Burst Mode® reduces light-load IQ to 28 µA; forced PWM maintains low-noise regulation for sensitive analog/RF circuitry. |
| Thermal shutdown & monitoring | Shuts down all enabled channels at 165°C (typ); TEMP pin provides continuous 10 mV/°C readout for predictive thermal management. |
Applications
| Automotive Infotainment | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Powering display controller, audio codec, CAN transceiver, and touch interface in a compact dashboard head unit. IC Role / Device Role / Timing Role: Configured as 4×2 A outputs (5 V, 3.3 V, 2.5 V, 1.8 V) to meet simultaneous rail demands of SoC and peripherals. Use Value: Eliminates 8 discrete regulators; reduces solution footprint by >60% versus point-of-load ICs while maintaining ±1% rail stability. |
Use Scenario: Supplying isolated field I/O drivers, microcontroller core, ADC reference, and RS-485 transceivers in modular automation hardware. IC Role / Device Role / Timing Role: Set to 2×4 A mode delivering 3.3 V @ 4 A (core logic) and 5 V @ 4 A (I/O bus), with independent PGOOD sequencing. Use Value: Enables single-chip power for dual-domain operation; IMON feedback allows real-time load profiling for predictive maintenance. |
| Medical Handheld Diagnostics | Edge AI Sensor Hub |
|
Use Scenario: Powering CMOS image sensor, low-noise amplifier, Bluetooth LE radio, and capacitive touchscreen in portable ultrasound probe. IC Role / Device Role / Timing Role: Operated in Burst Mode® with 8×1 A configuration to minimize standby power; TEMP pin feeds thermal alert to host MCU. Use Value: Achieves <100 µA system sleep current; ±1% accuracy ensures consistent ADC reference and sensor biasing across temperature. |
Use Scenario: Delivering power to vision processor, multi-axis IMU, Wi-Fi 6 module, and flash memory in battery-powered smart camera node. IC Role / Device Role / Timing Role: Configured as 3×2 A + 2×1 A (3.3 V, 1.8 V, 1.2 V, 1.1 V, 1.0 V) to match heterogeneous SoC rail map. Use Value: Supports dynamic voltage scaling via external resistor changes; RT pin enables 2 MHz switching to suppress noise near RF bands. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multirail PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3374EFE | Same pinout and configuration logic, but rated for –40°C to +105°C junction; lacks extended temperature qualification. | Suitable for commercial/industrial ambient environments only; not qualified for under-hood automotive use. | Select LTC3374EFE where full AEC-Q100 or extended temp operation is unnecessary and cost optimization is prioritized. |
| LTC3375EFE | 48-lead QFN (7 mm × 7 mm); adds I²C interface for dynamic configuration; same 8×1 A stage architecture and 2.25 V–5.5 V input. | Required where runtime reconfiguration (e.g., adaptive rail voltage tuning) or telemetry reporting is needed. | Choose LTC3375EFE when firmware-controlled flexibility outweighs board space constraints and added software complexity. |
Compared with LTC3374EFE, the LTC3374AEFE offers guaranteed operation to +125°C and tighter thermal shutdown thresholds; versus LTC3375EFE, it trades I²C programmability for smaller footprint, lower BOM cost, and deterministic hardware-based configuration.
Availability
LTC3374AEFE is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC modules, and medical handheld diagnostics requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for LTC3374AEFE 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 LTC3374AEFE belongs to ADI's Power by Linear™ configurable PMIC family, designed specifically to replace discrete regulator arrays in space-constrained, multirail systems where input voltage is ≤5.5 V and configurability must be achieved without firmware.
FAQ
What is the maximum total output current supported by the LTC3374AEFE?
The LTC3374AEFE supports up to 8 A total output current by configuring its eight internal 1 A synchronous buck stages into combinations such as 8×1 A, 4×2 A, or 2×4 A. This is achieved through hardware strapping of CFG0–CFG3 pins, with no external components required to enable stage paralleling. The LTC3374AEFE maintains ±1% output voltage accuracy across all configurations and load ranges.
Does the LTC3374AEFE require external BST capacitors?
No, the LTC3374AEFE integrates BST capacitors internally, eliminating the need for eight external boost capacitors typically required in buck converter designs. This reduces PCB area, BOM count, and potential failure points associated with external ceramic capacitors. The integration is confirmed in Analog Devices' official datasheet and application schematics for the LTC3374AEFE.
How does thermal monitoring work on the LTC3374AEFE?
The LTC3374AEFE provides die temperature monitoring via the TEMP pin, which outputs an analog voltage of 10 mV per degree Celsius. This allows direct measurement of junction temperature without external sensors. Additionally, the LTC3374AEFE features thermal shutdown that disables all enabled buck regulators when die temperature reaches 165°C (typical), re-enabling them only after cooling to 155°C (typical).
Can the LTC3374AEFE be used in automotive applications?
Yes, the LTC3374AEFE is specified for operation from –40°C to +125°C junction temperature and is widely deployed in automotive infotainment systems. Its robust thermal protection, integrated current monitoring (IMON), and power-good signaling (PGOOD) per channel meet functional safety requirements for non-safety-critical subsystems. It is not AEC-Q100 certified but is commonly used in dashboard modules where extended temperature range is mandatory.
What package type is used for the LTC3374AEFE?
The LTC3374AEFE is housed in a 38-lead QFN package measuring 5 mm × 7 mm with 0.5 mm pitch and an exposed thermal pad. This package supports high thermal dissipation in compact layouts and is compatible with standard reflow soldering processes. The pinout and mechanical drawing are documented in the official Analog Devices datasheet for the LTC3374AEFE.
LTC3374AEFE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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 FAQ
1.How can I place an order for LTC3374AEFE through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3374AEFE 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 reliable?
The price and inventory of LTC3374AEFE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3374AEFE is usually 5 days.
3.What payment methods are accepted for LTC3374AEFE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3374AEFE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3374AEFE?
LTC3374AEFE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3374AEFE 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?
For technical support, including LTC3374AEFE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3374AEFE requirements.
6.How does Aetrix verify that LTC3374AEFE is sourced from the original manufacturer or authorized distributors?
All LTC3374AEFE 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 meets industry standards.
7.What is the process for return or replacement of LTC3374AEFE?
All LTC3374AEFE units undergo pre-shipment inspection (PSI). If there is an issue with LTC3374AEFE, 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 part is unused and in its original packaging.
Return procedure for LTC3374AEFE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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