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Analog Devices Inc. LTC3371EFE
- Part No.:
- LTC3371EFE
- Manufacturer:
- Analog Devices Inc.
- Package:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3371EFE.pdf
- Description:
- IC REG BUCK ADJ 2A QUAD 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,379
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Product details
Overview
LTC3371EFE from Analog Devices is a quad-output, pin-configurable PMIC for multirail low-voltage power systems. It integrates four synchronous buck regulators with eight 1.5 A power stages, supports up to 8 A total output current, operates from 2.25 V to 5.5 V input, and delivers output voltages from 0.8 V to VIN in automotive infotainment and industrial control applications.
For engineers reviewing the LTC3371EFE datasheet, LTC3371EFE pinout, LTC3371EFE application, or LTC3371EFE equivalent, this page provides verified configuration options, thermal performance data, current monitor functionality, and real-world sequencing behavior-critical for compact, high-density power designs requiring stable rail generation under dynamic load conditions.
Technical Context
The LTC3371EFE implements a pin-strappable architecture using CFG0–CFG3 to select among eight predefined output current configurations (e.g., 4 × 2 A, 2 × 4 A, or 1 × 8 A), with each buck channel independently configurable for voltage via external feedback resistors. All channels support differential remote sensing and soft-start control.
It features integrated current monitoring (IMON pins), four independent PGOOD outputs, die temperature sensing via analog TEMP pin (10 mV/°C), and overtemperature shutdown at 165°C (typ). Switching frequency is fixed at 2 MHz or synchronizable from 1 MHz to 3 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.25 V to 5.5 V - supports direct connection to Li-ion battery packs or regulated 3.3 V/5 V system rails. |
| Total Output Current | Up to 8 A - distributed across 1–4 outputs depending on CFG pin settings; enables scalable rail design without changing IC. |
| Output Voltage Range | 0.8 V to VIN - allows generation of core logic, I/O, and memory rails including 1.8 V, 2.5 V, 3.3 V, and 5 V. |
| Switching Frequency | 2 MHz default, 1–3 MHz syncable - enables use of small, low-profile inductors and reduces EMI in noise-sensitive environments. |
| Quiescent Current | 68 µA (1 channel enabled) - minimizes standby power loss in always-on subsystems like CAN wake-up circuits. |
| Thermal Shutdown | 165°C (typ), hysteresis 10°C - protects against sustained overload or poor heatsinking in sealed enclosures. |
| Package | 38-lead QFN, 5 mm × 7 mm - exposes thermal pad for PCB-level heat dissipation; compatible with standard reflow profiles. |
Pinout & Package
The LTC3371EFE is housed in a 38-lead QFN package (5 mm × 7 mm) with exposed thermal pad. Pin assignments are validated per Analog Devices' official datasheet DS3371F.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINA, VINB, VINC, VIND | Input supply for respective buck channels | Independent inputs allow rail isolation and mixed-source operation (e.g., separate LDO + battery paths). |
| SWA–SWD | Switch node outputs | Drive external inductors; require low-ESR ceramic capacitors and careful layout to minimize switching loop area. |
| FB1–FB4 | Feedback inputs | Accept resistor dividers to set output voltage; support differential sensing for improved regulation accuracy. |
| PGOOD1–PGOOD4 | Power-good status indicators | Open-drain outputs signal ±5% output regulation; used for sequencing enable/disable in multi-PMIC systems. |
| IMON1–IMON4 | Current monitor outputs | Provide 1:1000 proportional current mirror for external load monitoring or closed-loop current limiting. |
| CFG0–CFG3 | Configuration select inputs | Digital inputs that determine output current allocation across channels (8 valid combinations defined in datasheet Table 1). |
| TEMP | Die temperature monitor | Analog voltage output (10 mV/°C); enables real-time thermal profiling without external sensor. |
| RUN1–RUN4 | Enable inputs | Individual channel control; support staggered startup and fault containment by disabling only affected rails. |
Key Features
| Feature | Design Value |
|---|---|
| Eight 1.5 A internal power stages | Enables flexible current distribution (e.g., 2 × 4 A or 4 × 2 A) without external MOSFETs or gate drivers. |
| Pin-strappable output configurations | Eight discrete CFG settings eliminate firmware dependency and simplify qualification across product variants. |
| Differential remote sensing | Compensates for PCB trace IR drop, maintaining ±1% output accuracy even with 100 mΩ path resistance. |
| Integrated current monitors | Eliminates need for external sense resistors and amplifiers, reducing BOM count and board space in current-critical designs. |
| Thermal monitoring + shutdown | Provides both diagnostic visibility (via TEMP pin) and autonomous protection, critical for unattended industrial deployments. |
Applications
| Automotive Infotainment Head Unit | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Powering display interface, audio codec, CAN transceiver, and microcontroller in a compact dashboard module. IC Role / Device Role / Timing Role: Quad-buck PMIC generating 1.2 V (core), 1.8 V (memory), 3.3 V (I/O), and 5 V (USB peripheral) rails from a 5 V supply. Use Value: Single-chip solution replaces four discrete regulators, reducing footprint by >60% while enabling synchronized startup and fault isolation. |
Use Scenario: Supplying field-programmable logic, analog front-end, isolated communication interfaces, and real-time controller in modular automation hardware. IC Role / Device Role / Timing Role: Configured as 2 × 4 A dual-rail mode to drive high-current digital isolators and ADC reference buffers simultaneously. Use Value: Eliminates need for external current-sharing circuitry; IMON outputs feed into FPGA-based health monitoring for predictive maintenance. |
| Medical Patient Monitor Display | Edge AI Sensor Hub |
|
Use Scenario: Delivering stable, low-noise power to OLED backlight driver, touch controller, ECG analog front-end, and ARM Cortex-M7 processor. IC Role / Device Role / Timing Role: Four independent 2 A rails with staggered RUN pin sequencing to meet IEC 60601-1 startup timing requirements. Use Value: PGOOD signals coordinate firmware initialization; TEMP pin enables continuous thermal logging for regulatory audit trails. |
Use Scenario: Powering vision processor, Wi-Fi/BLE SoC, MEMS sensor array, and secure element in battery-operated edge inference node. IC Role / Device Role / Timing Role: Configured as 4 × 2 A with Burst Mode® operation to extend battery life during idle periods between inference cycles. Use Value: 68 µA quiescent current ensures >1-year shelf life; CFG pins allow same PCB to support multiple sensor configurations via solder-jumper selection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-buck PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3374A | Octal-buck topology (8 × 1 A), 2.25 V–5.5 V input, 15 config modes, I²C interface optional | Higher channel count but lower per-channel current; requires firmware control for full configurability | Select when needing >4 rails or digital programmability; not pin-compatible with LTC3371EFE |
| LTC3375 | Octal-buck + external HV controller, 2.25 V–5.5 V input, 48-lead QFN, supports 0.425 V–VIN output | Includes high-voltage boost capability for bias rails; larger package and higher BOM complexity | Choose when powering mixed-signal ASICs requiring sub-1 V cores and 12 V analog bias simultaneously |
Compared with LTC3374A and LTC3375, the LTC3371EFE offers optimal balance of channel count, per-rail current capacity, and pin-strappable simplicity-making it ideal for cost-sensitive, space-constrained designs where firmware overhead must be minimized and thermal management is critical.
Availability
LTC3371EFE is available at Aetrix Electronics and suitable for automotive infotainment head units, industrial PLC I/O modules, and medical patient monitor displays requiring stable component supply, long-term lifecycle support, and consistent thermal performance across temperature extremes.
Supply support for LTC3371EFE 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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC3371EFE belongs to ADI's Power by Linear™ configurable PMIC family, designed specifically for compact, thermally robust multirail power delivery in feature-rich embedded systems where board space and thermal headroom are severely constrained.
FAQ
What is the maximum total output current supported by the LTC3371EFE?
The LTC3371EFE supports up to 8 A total output current, distributed across one to four buck outputs depending on CFG0–CFG3 pin settings. Valid configurations include 4 × 2 A, 2 × 4 A, 1 × 8 A, and asymmetric splits such as 3 A + 3 A + 2 A. This scalability allows reuse of the same LTC3371EFE across multiple product variants without redesigning the power stage.
Does the LTC3371EFE require external bootstrap capacitors?
No, the LTC3371EFE integrates internal bootstrap capacitors for all four buck channels, eliminating the need for external BST caps and simplifying layout. This integration reduces component count, improves reliability, and avoids common failure modes associated with external capacitor aging or placement errors in the LTC3371EFE design.
How does the LTC3371EFE handle thermal overload conditions?
The LTC3371EFE incorporates dual thermal protection: an overtemperature shutdown activates at 165°C (typical) to disable all enabled buck regulators until die temperature falls to 155°C, and a dedicated TEMP pin provides continuous analog voltage output (10 mV/°C) for real-time thermal monitoring in the LTC3371EFE system.
Can the LTC3371EFE generate sub-1 V output voltages?
No, the LTC3371EFE supports output voltages from 0.8 V to VIN only. It cannot generate sub-0.8 V rails such as 0.6 V or 0.7 V required by advanced CPU cores. For such applications, designers should consider the LTC3375 (0.425 V–VIN) or LTC3376 (0.4 V–VIN), not the LTC3371EFE.
Is the LTC3371EFE pin-compatible with other devices in the LTC337x family?
No, the LTC3371EFE is not pin-compatible with LTC3374, LTC3374A, LTC3375, or LTC3376. Each device has distinct pin counts (38-lead QFN vs. 48- or 64-ball BGA), different pin functions, and unique package footprints. Migration between these parts requires PCB redesign; the LTC3371EFE must be treated as a standalone solution.
LTC3371EFE 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:
- 4
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 2A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-TSSOP-EP
LTC3371EFE FAQ
1.How can I place an order for LTC3371EFE through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3371EFE 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 LTC3371EFE reliable?
The price and inventory of LTC3371EFE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3371EFE is usually 5 days.
3.What payment methods are accepted for LTC3371EFE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3371EFE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3371EFE?
LTC3371EFE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3371EFE 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 LTC3371EFE?
For technical support, including LTC3371EFE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3371EFE requirements.
6.How does Aetrix verify that LTC3371EFE is sourced from the original manufacturer or authorized distributors?
All LTC3371EFE 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 LTC3371EFE meets industry standards.
7.What is the process for return or replacement of LTC3371EFE?
All LTC3371EFE units undergo pre-shipment inspection (PSI). If there is an issue with LTC3371EFE, 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 LTC3371EFE part is unused and in its original packaging.
Return procedure for LTC3371EFE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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