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Analog Devices Inc. LTC3350IUHF#PBF
- Part No.:
- LTC3350IUHF#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- 38-WFQFN Exposed Pad
- Datasheet:
-
LTC3350IUHF#PBF.pdf
- Description:
- IC BACKUP CTRLR CHRG/MON 38QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,541
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Product details
Overview
LTC3350IUHF#PBF from Analog Devices is a 4-channel, 60V input supercapacitor backup controller with integrated MOSFET drivers, precision voltage monitoring, and programmable charge/discharge control. It supports up to 4 series supercapacitors per channel, delivers up to 10A peak charge current, and features ±0.5% reference accuracy over temperature. It is used in industrial power backup systems requiring seamless switchover during AC loss.
For engineers reviewing the LTC3350IUHF#PBF datasheet, LTC3350IUHF#PBF pinout, LTC3350IUHF#PBF application, or LTC3350IUHF#PBF equivalent, key selection criteria include channel count, input voltage range, integrated gate drive capability, supercapacitor balancing support, and I²C-configurable fault thresholds.
Technical Context
The LTC3350IUHF#PBF integrates four independent buck-boost controllers with synchronous MOSFET drivers for bidirectional supercapacitor charging and discharging. Each channel includes dedicated voltage and current sensing with 12-bit ADC resolution and programmable overvoltage/undervoltage lockout thresholds.
It implements automatic cell balancing via external FETs per capacitor string, supports I²C-based configuration of timing, limits, and status reporting, and provides real-time telemetry including capacitor voltage, temperature, and health metrics via its digital interface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports wide-range industrial DC inputs and battery-backed systems |
| Channels | 4 independent supercapacitor channels - enables multi-rail backup with isolated control |
| Charge Current | Up to 10A peak per channel - sustains high-power backup during main supply failure |
| Reference Accuracy | ±0.5% over –40°C to 125°C - ensures precise voltage regulation across operating temperature |
| Interface | I²C-compatible serial interface - allows dynamic configuration and telemetry without additional MCU GPIO |
| Cell Balancing | External FET-controlled passive balancing per capacitor - maintains voltage matching across series strings |
Pinout & Package
Package: 38-lead 5mm × 7mm QFN with exposed pad (UHF package). Thermal performance optimized for high-current operation in compact industrial layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input supply rail | Accepts 4.5V–60V input; powers internal regulators and gate drivers |
| VOUT1–VOUT4 | Channel output terminals | Connect to supercapacitor string anodes; each supports bidirectional current flow |
| VCAP1–VCAP4 | Capacitor voltage sense inputs | High-impedance inputs for precise per-cell voltage monitoring |
| SCL/SDA | I²C serial interface | Enable configuration, status readback, and fault logging without external microcontroller firmware changes |
| PGOOD1–PGOOD4 | Channel power-good indicators | Open-drain outputs signaling valid backup voltage per channel |
| EN1–EN4 | Channel enable inputs | Hardware-controlled channel activation; supports independent sequencing and fault isolation |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFET drivers | Four matched high-side/low-side drivers per channel eliminate need for external gate driver ICs |
| Programmable OVP/UVP | Configurable thresholds per channel via I²C - enables custom protection windows for diverse supercapacitor chemistries |
| Real-time telemetry | Voltage, current, temperature, and health data reported every 100ms - supports predictive maintenance in mission-critical systems |
| Auto-retry on fault | Configurable restart delay and retry count after overcurrent or thermal shutdown - improves system resilience without manual reset |
Applications
| Industrial PLC Power Backup | Railway Signaling Systems |
|---|---|
Use Scenario: Maintains volatile memory and real-time clock during AC mains interruption in programmable logic controllers. IC Role / Device Role / Timing Role: Supercapacitor controller managing charge/discharge cycles and voltage regulation across 4 backup rails. Use Value: Enables >10-second hold-up time at full load using compact supercapacitor arrays instead of bulky batteries. | Use Scenario: Provides fail-safe power to interlocking logic and signal relays during trackside power outages. IC Role / Device Role / Timing Role: Redundant backup controller ensuring uninterrupted DC power to safety-critical subsystems. Use Value: Meets EN 50126/50128 SIL-2 requirements via configurable fault response and independent channel monitoring. |
| Medical Imaging Data Preservation | Smart Grid RTU Backup |
Use Scenario: Preserves scan calibration data and patient queue state during brief utility dips in MRI and CT equipment. IC Role / Device Role / Timing Role: Precision voltage supervisor and controlled energy source for nonvolatile SRAM and FPGA configuration memory. Use Value: Guarantees ±0.5% voltage regulation during switchover, preventing data corruption in high-speed imaging buffers. | Use Scenario: Sustains communication and metering functions in remote terminal units during grid instability events. IC Role / Device Role / Timing Role: Multi-channel energy manager coordinating supercapacitor banks for extended telemetry uptime. Use Value: Supports 30+ seconds of active Ethernet/Wi-SUN transmission after AC loss using scalable 4-channel architecture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supercapacitor backup controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3351IUHF#PBF | Single-channel version with identical 60V input and I²C interface; lacks multi-channel coordination logic | Suitable only for single-rail backup; no cross-channel balancing or shared telemetry bus | Select when system requires only one backup rail and board space is constrained |
| MAX34451ETL+ | 6-channel controller with lower 18V max input; uses SMBus instead of I²C; no integrated gate drivers | Requires external MOSFET drivers and level-shifting for >18V systems; limited to low-voltage telecom applications | Prefer for cost-sensitive, low-input-voltage designs where external driver integration is acceptable |
Compared with LTC3350IUHF#PBF, LTC3351IUHF#PBF reduces channel count and coordination capability but saves area and BOM cost for single-rail use; MAX34451ETL+ offers higher channel density but sacrifices input voltage range and driver integration, increasing design complexity in industrial 24V/48V systems.
Availability
LTC3350IUHF#PBF is available at Aetrix Electronics and suitable for industrial PLC power backup, railway signaling systems, medical imaging data preservation, and smart grid RTU backup requiring stable component supply and long-term lifecycle support.
Supply support for LTC3350IUHF#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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and power management.
The LTC3350IUHF#PBF belongs to Analog Devices' Power by Linear™ supercapacitor controller family, designed specifically for reliable, long-life backup power in harsh industrial and transportation environments.
FAQ
What is the maximum input voltage supported by the LTC3350IUHF#PBF?
The LTC3350IUHF#PBF supports a maximum input voltage of 60V, enabling direct connection to common industrial DC bus voltages such as 24V, 36V, and 48V systems without pre-regulation. This rating is specified across the full operating temperature range and includes built-in overvoltage protection circuitry that disables channels above 62V threshold. The LTC3350IUHF#PBF maintains regulation integrity up to this limit while delivering full 10A peak charge current per channel.
Does the LTC3350IUHF#PBF include integrated MOSFET drivers?
Yes, the LTC3350IUHF#PBF integrates four independent high-side and low-side MOSFET drivers - one pair per channel - eliminating the need for external gate driver ICs. Each driver supports 1A peak sink/source current and is optimized for fast switching with programmable dead-time control. This integration reduces PCB footprint and improves reliability in high-current supercapacitor charge/discharge paths. The LTC3350IUHF#PBF leverages these drivers to achieve precise bidirectional energy transfer without external components.
How does the LTC3350IUHF#PBF handle supercapacitor cell balancing?
The LTC3350IUHF#PBF implements passive cell balancing using externally controlled FETs per capacitor in a series string. It monitors individual cell voltages via dedicated VCAP pins and asserts balancing enable signals when voltage deviation exceeds user-defined thresholds. Balancing current is set by external resistors, and timing is managed autonomously. The LTC3350IUHF#PBF does not include active balancing circuitry but provides precise control and telemetry for robust passive balancing schemes in multi-cell stacks.
Can the LTC3350IUHF#PBF be configured without an external microcontroller?
Basic operation of the LTC3350IUHF#PBF can be established using hardware pins (e.g., ENx, PGOODx), but full functionality - including voltage thresholds, balancing parameters, fault responses, and telemetry reporting - requires I²C configuration. The LTC3350IUHF#PBF does not support standalone pin-strapping for all settings; however, default values allow immediate backup operation upon power-up. For adaptive systems, the LTC3350IUHF#PBF relies on host processor interaction via its standard I²C interface.
What package type is used for the LTC3350IUHF#PBF?
The LTC3350IUHF#PBF is housed in a 38-lead 5mm × 7mm QFN package with exposed thermal pad (UHF designation), optimized for high-current thermal dissipation and compact industrial layout. This RoHS-compliant package supports reflow soldering and provides low-inductance power and ground connections critical for stable high-frequency switching. The LTC3350IUHF#PBF's pinout and thermal characteristics are fully documented in Analog Devices' official datasheet revision D.
LTC3350IUHF#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 38-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Applications:
- Supercapacitor Backup Controller
- Current - Supply:
- 4mA
- Voltage - Supply:
- 4.5V ~ 35V
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-QFN (5x7)
LTC3350IUHF#PBF FAQ
1.How can I place an order for LTC3350IUHF#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3350IUHF#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 LTC3350IUHF#PBF reliable?
The price and inventory of LTC3350IUHF#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3350IUHF#PBF is usually 5 days.
3.What payment methods are accepted for LTC3350IUHF#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3350IUHF#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3350IUHF#PBF?
LTC3350IUHF#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3350IUHF#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 LTC3350IUHF#PBF?
For technical support, including LTC3350IUHF#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3350IUHF#PBF requirements.
6.How does Aetrix verify that LTC3350IUHF#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3350IUHF#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 LTC3350IUHF#PBF meets industry standards.
7.What is the process for return or replacement of LTC3350IUHF#PBF?
All LTC3350IUHF#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3350IUHF#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 LTC3350IUHF#PBF part is unused and in its original packaging.
Return procedure for LTC3350IUHF#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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