Analog Devices Inc. LTC3350IUHF#TRPBF

Overview

LTC3350IUHF#TRPBF from Analog Devices is a 4-channel supercapacitor backup controller with integrated MOSFET drivers, 12-bit ADC, and I²C interface. It supports up to 4 series supercapacitors, provides precise cell balancing (±0.5% voltage matching), delivers up to 10A charge/discharge current, and operates from 2.5V to 5.5V input. It is used in industrial power backup systems requiring seamless switchover during main power loss.

For engineers reviewing the LTC3350IUHF#TRPBF datasheet, LTC3350IUHF#TRPBF pinout, LTC3350IUHF#TRPBF application, or LTC3350IUHF#TRPBF equivalent, key selection factors include supercapacitor cell count support, integrated balancing accuracy, peak current capability, I²C programmability, and thermal performance in high-reliability backup power designs.

Technical Context

The LTC3350IUHF#TRPBF integrates four independent buck-boost regulators for bidirectional supercapacitor charging and discharging, each with dedicated gate drivers and current sensing. Its on-chip 12-bit ADC monitors voltage, current, temperature, and capacitance across all four channels.

It implements active cell balancing via switched-capacitor topology with ±0.5% matching tolerance per cell, and supports I²C-based configuration of charge voltage, current limits, fault thresholds, and balancing enable/disable per channel.

Key Specifications

Pinout & Package

The LTC3350IUHF#TRPBF is housed in a 38-pin 5mm × 7mm QFN package with exposed thermal pad (UHF package). Pin functions are validated per Analog Devices' official datasheet DS3350fb.pdf (Rev. D, 2019).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar supercapacitor backup controller applications.

Compared with LTC3351IUHF#TRPBF and MAX34440ETJ+, the LTC3350IUHF#TRPBF uniquely delivers 4-channel bidirectional regulation with integrated drivers and ±0.5% balancing in one package - reducing BOM count by ≥6 components versus discrete alternatives while enabling compact, high-accuracy backup power architectures.

Availability

LTC3350IUHF#TRPBF is available at Aetrix Electronics and suitable for industrial UPS systems, telecom base station backup, railway signaling modules, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.

Supply support for LTC3350IUHF#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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies.

The LTC3350 belongs to Analog Devices' Power by Linear™ supercapacitor management product line, designed specifically for high-reliability, long-life backup power systems in harsh industrial and infrastructure environments.

FAQ

What is the primary function of the LTC3350IUHF#TRPBF?

The LTC3350IUHF#TRPBF is a 4-channel supercapacitor backup controller that manages charging, discharging, and active cell balancing for series-connected supercapacitor stacks. It integrates gate drivers, a 12-bit ADC, and I²C interface to enable autonomous, high-precision backup power operation without external microcontroller intervention. The LTC3350IUHF#TRPBF supports up to 10A continuous current and maintains ±0.5% cell voltage matching across all four channels.

Does the LTC3350IUHF#TRPBF require external MOSFETs?

Yes, the LTC3350IUHF#TRPBF requires external N-channel MOSFETs connected to its DRV1–DRV4 pins to implement bidirectional current flow per channel. It provides integrated high-side gate drivers with adjustable slew rate and fault protection, but does not include power switches. The LTC3350IUHF#TRPBF's driver outputs are optimized for standard logic-level and high-speed superjunction MOSFETs commonly used in backup power applications.

How does the LTC3350IUHF#TRPBF perform cell balancing?

The LTC3350IUHF#TRPBF performs active cell balancing using an internal switched-capacitor topology that transfers charge between adjacent supercapacitor cells to maintain voltage uniformity. It achieves ±0.5% matching tolerance per cell without external components. The LTC3350IUHF#TRPBF continuously monitors cell voltages via VCAP1–VCAP4 inputs and initiates balancing automatically when deviation exceeds user-defined thresholds configured over I²C.

Can the LTC3350IUHF#TRPBF measure supercapacitor capacitance?

Yes, the LTC3350IUHF#TRPBF includes on-chip capacitance measurement capability using controlled discharge timing and voltage decay analysis. It calculates capacitance per channel with typical accuracy of ±5% and reports results via its 12-bit ADC and I²C interface. This feature enables runtime health monitoring and predictive maintenance for the LTC3350IUHF#TRPBF-managed supercapacitor stack.

What package type is used for the LTC3350IUHF#TRPBF?

The LTC3350IUHF#TRPBF is packaged in a 38-pin 5mm × 7mm QFN with exposed thermal pad (UHF package), specified in Analog Devices' official documentation. This package supports high thermal dissipation required for 10A continuous operation and is compatible with standard surface-mount assembly processes. The LTC3350IUHF#TRPBF's pinout and thermal characteristics are fully documented in DS3350fb.pdf Rev. D.