Analog Devices Inc. LTC3310JV-1#TRPBF

Overview

LTC3310JV-1#TRPBF from Analog Devices is a monolithic, Silent Switcher 2 synchronous step-down DC/DC converter delivering up to 10A output current from 2.25V–5.5V input, with fixed 1.0V output, ±1% accuracy over temperature, and 100% duty cycle capability for low-dropout operation in automotive power systems.

For engineers reviewing the LTC3310JV-1#TRPBF datasheet, LTC3310JV-1#TRPBF pinout, LTC3310JV-1#TRPBF application, or LTC3310JV-1#TRPBF equivalent, key selection criteria include AEC-Q100 qualification, 18-lead 3mm × 3mm LQFN package with exposed PGND pad, 35ns minimum on-time, programmable switching frequency up to 5MHz, and integrated output short-circuit protection with soft-start recovery.

Technical Context

The LTC3310JV-1#TRPBF employs constant-frequency peak current mode control with internal 500mV reference and error amplifier transconductance of 800µS-optimized for fast transient response in FPGA and ASIC core supplies. Its Silent Switcher 2 architecture integrates VIN-to-PGND and VIN-to-AGND bypass capacitors to minimize EMI without external ceramic placement constraints.

It supports multiphase parallel operation via MODE/SYNC pin, configurable for pulse-skipping or forced continuous mode, and delivers active voltage positioning (AVP) with 1.7–3.1mV/A load-line slope for improved dynamic regulation in high-current POL applications.

Key Specifications

Pinout & Package

Package: 18-lead 3mm × 3mm LQFN with exposed thermal pad (Pin 19), θ_JA = 42°C/W, θ_JCbottom = 9°C/W. Exposed pad must be soldered to PCB ground plane for thermal and EMI performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous step-down converter applications.

Compared with LTC3310S-1#TRPBF, the LTC3310JV-1#TRPBF adds AEC-Q100 Grade 0 qualification and extended 150°C operation-essential for automotive power rails-while TPS546B24RVFT trades analog simplicity for digital configurability at lower current capacity and higher EMI risk.

Availability

LTC3310JV-1#TRPBF is available at Aetrix Electronics and suitable for automotive ADAS modules, industrial FPGA power supplies, and telecom baseband processors requiring stable component supply with full AEC-Q100 compliance and long-term production support.

Supply support for LTC3310JV-1#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets.

The LTC3310 family is designed for high-efficiency, low-EMI point-of-load conversion in space-constrained, thermally demanding applications-especially automotive and industrial systems requiring robust transient response and AEC-Q100 reliability.

FAQ

What is the maximum output current capability of the LTC3310JV-1#TRPBF?

The LTC3310JV-1#TRPBF delivers up to 10A continuous output current under typical thermal conditions (θ_JA = 42°C/W, T_A ≤ 85°C). Peak current capability is limited by top switch current limit (14.5–18.5A) and bottom switch valley limit (10–14A), both specified over the full –40°C to +150°C junction range. Derating is required above 85°C ambient.

Does the LTC3310JV-1#TRPBF require external feedback resistors?

No, the LTC3310JV-1#TRPBF does not require external feedback resistors. It is the fixed 1.0V output variant-internal resistor divider regulates VOUT directly to 1.000V ±1%. This eliminates component count and layout sensitivity associated with external dividers, improving accuracy and reducing board area versus adjustable versions like LTC3310JV.

How does the Silent Switcher 2 architecture in the LTC3310JV-1#TRPBF reduce EMI?

The LTC3310JV-1#TRPBF integrates internal hot-loop bypass capacitors between VIN–PGND and VIN–AGND, minimizing high-di/dt loop area. Combined with symmetrical SW pin layout and matched internal power switches, this achieves ultralow radiated emissions-meeting CISPR 25 Class 5 peak limits without external EMI filters-critical for automotive EMC certification.

Can the LTC3310JV-1#TRPBF operate in multiphase configurations?

Yes, the LTC3310JV-1#TRPBF supports multiphase operation via its MODE/SYNC pin. When configured as a slave, it synchronizes switching to an external clock or master device; as a master, it outputs a clock signal. Phase offsets are set using the RT pin, enabling seamless current sharing across multiple LTC3310JV-1#TRPBF units for >10A applications.

What thermal considerations apply to the LTC3310JV-1#TRPBF in automotive applications?

The LTC3310JV-1#TRPBF is rated for –40°C to +150°C junction temperature and qualified per AEC-Q100 Grade 0. For reliable operation, the exposed PGND pad (Pin 19) must be soldered to a large internal PCB ground plane with ≥6 thermal vias (0.3mm diameter). Power dissipation must be calculated using R_DS(ON) values at worst-case VIN (2.25V) and T_J to ensure T_J stays below 150°C.