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Analog Devices Inc. LTC3376EY#PBF
- Part No.:
- LTC3376EY#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 64-LFBGA
- Datasheet:
-
LTC3376EY#PBF.pdf
- Description:
- IC REG BUCK ADJ 12A QUAD 64BGA
- Quantity:
- Payment:
- Shipping:
Inventory:249
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Product details
Overview
LTC3376EY#PBF from Analog Devices is a 20V, 4-channel synchronous buck DC/DC controller IC integrating eight configurable 1.5A power stages, supporting input voltage range of 3V to 20V and output voltage range of 0.4V to 0.83×VIN. It enables up to 12A per channel via pin-strappable CFG0–CFG3 configuration (15 unique output configurations), features internal BST capacitors for PCB space reduction, and supports programmable switching frequency from 1MHz to 3MHz. It is used in telecom and industrial distributed power systems requiring precise sequencing and high-density multi-rail regulation.
For engineers reviewing the LTC3376EY#PBF datasheet, LTC3376EY#PBF pinout, LTC3376EY#PBF application, or LTC3376EY#PBF equivalent, key selection considerations include its 8×1.5A stage configurability, ±1% VOUT accuracy across all channels, differential feedback sensing, integrated current monitoring, and thermal shutdown at 165°C with 10°C hysteresis.
Technical Context
The LTC3376EY#PBF implements peak current mode control with selectable Burst Mode® or forced continuous operation via SYNC/MODE pin. Each of its four buck regulators uses shared power stages assigned through CFG0–CFG3 logic levels, enabling flexible current allocation (1.5A to 12A per output) without external reconfiguration.
It integrates internal BST capacitors for all eight power stages, eliminating external boost capacitors. The EXTVCC pin allows internal circuitry to run from an external 3V–5.5V rail-improving efficiency-and precision RUN pin thresholds (280–1200mV rising, 180–320mV falling) support deterministic power-up sequencing across multiple rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 20V per input rail - supports wide-input industrial and telecom supplies including 12V and 20V distribution buses. |
| Output Voltage Accuracy | ±1% over temperature - ensures stable regulation for sensitive digital loads like FPGAs and ASICs. |
| Switching Frequency | 1MHz to 3MHz (RT-programmable, PLL-sync, or internal 2MHz) - enables compact magnetics and low-noise operation in noise-sensitive applications. |
| Quiescent Current | 27µA (1 buck enabled), 42µA (all bucks enabled) - minimizes standby power in always-on systems. |
| Power Stage Configuration | 8×1.5A stages, pin-selectable into 1–4 outputs (1.5A–12A per channel) - provides single-IC scalability across diverse rail count and current requirements. |
| Thermal Protection | Overtemperature shutdown at 165°C with 10°C hysteresis - prevents permanent damage during overload or poor thermal design. |
| Feedback Sensing | Differential FB+ / FB− inputs - rejects common-mode noise and improves regulation accuracy in noisy environments. |
Pinout & Package
The LTC3376EY#PBF is housed in a 64-lead 7mm × 7mm BGA package with 0.8mm ball pitch and operates from –40°C to +125°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CFG0–CFG3 | Configuration Inputs | Set one of 15 power-stage allocations (e.g., 4×3A, 2×6A, 1×12A); must be tied to INTVCC or GND - no floating allowed. |
| RUN1–RUN4 | Enable Inputs | Active-high enable with precision thresholds (280–1200mV rising); supports staggered power-up sequencing between rails. |
| FB1+–FB4+, FB1−–FB4− | Differential Feedback Inputs | Enable accurate remote sensing; FB− connects directly to ground-side of resistor divider - eliminates PCB trace IR drop error. |
| IMON1–IMON4 | Current Monitor Outputs | Provide 100µA/A (typ.) current source proportional to load per configured stage - enables real-time load monitoring with simple RC filtering. |
| PGOOD1–PGOOD4 | Open-Drain Power-Good Indicators | Assert high only when output is within ±3.25% of target (96.75–107.5%) - supports system-level fault detection and sequencing handshaking. |
| EXTVCC | External Low-Voltage Supply Input | Accepts 3V–5.5V to power internal circuitry - reduces VCC current draw and improves light-load efficiency when tied to a 3.3V output rail. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated BST Capacitors | Eliminates 8 external ceramic boost capacitors - saves >12mm² PCB area and reduces component count in high-density designs. |
| Configurable Power Stages | Eight 1.5A stages assignable across 1–4 outputs via hardware pins - avoids firmware dependency and enables field-reconfigurable power trees. |
| Precision RUN Thresholds | 280mV–1200mV rising threshold with 200mV hysteresis - enables robust, repeatable sequencing across temperature and supply variation. |
| Temperature Monitoring | TEMP pin outputs 250mV at 25°C with 10mV/°C slope - provides direct die-temperature readout for thermal management without external sensors. |
| Soft-Start Control | Programmable 0.3–2.5ms soft-start time - prevents inrush current and output overshoot during power-up of large capacitive loads. |
Applications
| Telecom Base Station Power | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Distributed 12V input powering multiple isolated rails (e.g., 5V, 3.3V, 1.8V, 1.2V) for FPGA, transceivers, and analog front-ends in 4G/5G macro base stations. IC Role / Device Role / Timing Role: Primary multi-output buck controller managing rail generation, sequencing, and health monitoring across four independent power domains. Use Value: Single-chip solution replaces four discrete buck controllers, reducing BOM cost by ~35% and board area by >40% while maintaining ±1% regulation accuracy. | Use Scenario: Compact DIN-rail mounted PLC with mixed-signal I/O requiring tightly regulated, sequenced rails for microcontroller, ADCs, digital isolators, and field-side drivers. IC Role / Device Role / Timing Role: Centralized power manager delivering 3.3V (core), 5V (I/O), 12V (drivers), and 15V (analog) with synchronized startup and individual PGOOD signaling. Use Value: Configurable stage assignment allows dynamic current scaling (e.g., 6A on 5V for high-current digital I/O, 3A on 12V for solenoid drivers) without redesign. |
| Automotive ADAS Domain Controller | Test & Measurement Equipment |
Use Scenario: 12V automotive battery input powering vision processor, radar SoC, CAN transceivers, and sensor interfaces in centralized ADAS domain controller. IC Role / Device Role / Timing Role: High-reliability power subsystem providing fault-tolerant rail generation with thermal monitoring, current sensing, and overvoltage protection per channel. Use Value: Integrated OT shutdown (165°C) and differential feedback ensure stable operation under engine-bay thermal stress and EMI-rich environments. | Use Scenario: Benchtop oscilloscope or spectrum analyzer requiring ultra-low-noise, low-drift analog rails (±5V, +15V, –5V) alongside clean digital supplies (1.2V, 1.8V, 3.3V). IC Role / Device Role / Timing Role: Precision multi-rail generator using Burst Mode for low-noise standby and forced continuous mode during active measurement cycles. Use Value: 27µA quiescent current extends battery backup runtime; 1% VOUT accuracy maintains measurement integrity across temperature drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4476-AEC1 from Monolithic Power Systems | 4-channel, 3A/channel max; fixed 2.2MHz fSW; no internal BST caps; AEC-Q200 qualified | Targeted for automotive use only; lacks CFG pin flexibility and current monitor outputs | Select when AEC-Q200 qualification is mandatory and 3A/channel suffices; not suitable for >3A or industrial telecom use. |
| TPS546D24 from Texas Instruments | Single-channel, 60A max; PMBus interface; external power stages; requires external BST caps | High-current, digitally controlled VR for CPUs/GPUs; no multi-rail integration | Select for single-rail, high-current (>12A), digitally managed applications; not a functional substitute for multi-output configurability. |
Compared with MPQ4476-AEC1 and TPS546D24, the LTC3376EY#PBF uniquely combines hardware-configurable multi-output capability, integrated BST capacitance, and analog current monitoring - making it optimal for space-constrained, thermally demanding industrial and telecom systems needing flexible, self-contained power delivery.
Availability
LTC3376EY#PBF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and automotive ADAS domain controllers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC3376EY#PBF 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC3376EY#PBF belongs to Analog Devices' Power by Linear™ family, designed specifically for high-efficiency, high-density, multi-rail DC/DC conversion in space- and thermal-constrained applications where configurability and reliability are critical.
FAQ
What is the maximum output current per channel supported by the LTC3376EY#PBF?
The LTC3376EY#PBF supports up to 12A per channel by combining all eight 1.5A power stages into a single output. This is achieved via pin-strapping CFG0–CFG3 to select configuration code "1111" (15th option). Real-world current is limited by thermal design, PCB layout, and inductor saturation rating - full 12A operation requires careful thermal management and low-DCR magnetics.
Does the LTC3376EY#PBF require external boost capacitors?
No, the LTC3376EY#PBF integrates ceramic boost capacitors internally for all eight power stages. This eliminates the need for eight external BST capacitors, saving significant PCB area and reducing component count. External BST caps are neither required nor recommended - the internal capacitors are optimized for performance and reliability across temperature and lifetime.
How does the EXTVCC pin improve efficiency in the LTC3376EY#PBF?
The EXTVCC pin allows the LTC3376EY#PBF's internal circuitry to draw bias current from an external 3V–5.5V supply instead of the main VCC rail. When tied to a 3.3V output rail, it reduces VCC current draw by ~50%, directly lowering system quiescent power - especially beneficial in battery-backed or energy-sensitive applications where every microamp matters.
Can the LTC3376EY#PBF support power sequencing across multiple rails?
Yes, the LTC3376EY#PBF supports precise power sequencing via independent RUN1–RUN4 enable inputs with programmable thresholds (280–1200mV rising) and PGOOD1–PGOOD4 open-drain status outputs. By cascading PGOOD outputs to downstream RUN pins or using external logic, designers can implement strict turn-on/turn-off order - essential for FPGAs, processors, and mixed-signal SoCs.
What is the operating temperature range for the LTC3376EY#PBF?
The LTC3376EY#PBF is rated for operation from –40°C to +125°C junction temperature. This extended range is validated for the E-grade part (LTC3376EY#PBF), making it suitable for harsh industrial and telecom environments. Thermal derating applies above 125°C; junction temperature must be calculated using θJA = 35°C/W and actual power dissipation to ensure reliability.
LTC3376EY#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 64-LFBGA
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 4
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 0.4V
- Voltage - Output (Max):
- 16.6V
- Current - Output:
- 12A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-BGA (7x7)
LTC3376EY#PBF FAQ
1.How can I place an order for LTC3376EY#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3376EY#PBF 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 LTC3376EY#PBF reliable?
The price and inventory of LTC3376EY#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3376EY#PBF is usually 5 days.
3.What payment methods are accepted for LTC3376EY#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3376EY#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3376EY#PBF?
LTC3376EY#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3376EY#PBF 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 LTC3376EY#PBF?
For technical support, including LTC3376EY#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3376EY#PBF requirements.
6.How does Aetrix verify that LTC3376EY#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3376EY#PBF 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 LTC3376EY#PBF meets industry standards.
7.What is the process for return or replacement of LTC3376EY#PBF?
All LTC3376EY#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3376EY#PBF, 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 LTC3376EY#PBF part is unused and in its original packaging.
Return procedure for LTC3376EY#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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