Analog Devices Inc. LTC3310SEV#WPBF

Overview

LTC3310SEV#WPBF from Analog Devices is a monolithic, Silent Switcher 2 synchronous step-down DC/DC converter delivering up to 10A output current from a 2.25V–5.5V input, featuring 500mV feedback reference, 35ns minimum on-time, and ±1% VOUT accuracy with remote sense. It operates in pulse-skip or forced continuous mode and is used in FPGA core supplies requiring low-noise, high-efficiency POL regulation.

For engineers reviewing the LTC3310SEV#WPBF datasheet, LTC3310SEV#WPBF pinout, LTC3310SEV#WPBF application, or LTC3310SEV#WPBF equivalent, key selection factors include its 3mm × 3mm LQFN thermal performance, AEC-Q100 qualification for automotive use, programmable 0.5–5MHz switching frequency, and integrated hot-loop bypass capacitors enabling ultralow EMI without external layout constraints.

Technical Context

The LTC3310SEV#WPBF employs constant-frequency peak current mode control with internal 400µS error amplifier transconductance and 18A/V ITH-to-peak-current gain, enabling fast transient response under dynamic load steps. Its Silent Switcher 2 architecture integrates VIN-to-PGND and VIN-to-AGND bypass capacitors, eliminating external high-frequency ceramic placement sensitivity while maintaining <30dBµV/m CISPR25 Class 5 radiated emissions at 2MHz.

It supports multiphase parallel operation via MODE/SYNC pin clock synchronization or phase offset programming with RT resistor, and implements dual overcurrent protection: top-switch peak limit (14.5–18.5A) and bottom-switch valley limit (10–14A), allowing safe operation during inductor saturation events.

Key Specifications

Pinout & Package

Package: 18-lead 3mm × 3mm LQFN with exposed PGND pad (Pin 19), θJA = 42°C/W, θJCbottom = 9°C/W. Exposed pad must be soldered to PCB ground plane with ≥6 thermal vias.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP2964GQKT-Z and TPS546D24RSAR, the LTC3310SEV#WPBF uniquely combines AEC-Q100 qualification, 3mm × 3mm footprint, integrated Silent Switcher 2 capacitors, and ±1% remote-sense accuracy - making it optimal for automotive and portable industrial POL where size, EMI, and precision are co-constrained.

Availability

LTC3310SEV#WPBF is available at Aetrix Electronics and suitable for automotive ADAS modules, FPGA core supplies, and 5G small cell baseband power requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for LTC3310SEV#WPBF 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 since 1965.

The LTC3310SEV#WPBF belongs to Analog Devices' Power by Linear™ family of ultralow-noise, high-efficiency DC/DC converters designed specifically for noise-sensitive applications including automotive radar, medical imaging, and high-speed data converters.

FAQ

What is the maximum output current capability of the LTC3310SEV#WPBF?

The LTC3310SEV#WPBF delivers up to 10A continuous output current when properly heatsinked on a 4-layer PCB with ≥6 thermal vias to a solid ground plane. Its 3mm × 3mm LQFN package achieves θJCbottom = 9°C/W, enabling this rating within the –40°C to +125°C junction temperature range specified for the E-grade automotive variant.

Does the LTC3310SEV#WPBF support remote voltage sensing?

Yes, the LTC3310SEV#WPBF supports true remote voltage sensing via its dedicated AGND pin, which serves as the Kelvin return for the FB resistive divider. This allows the IC to regulate output voltage at the load point with ±1% accuracy despite up to ±100mV ground potential difference between the IC's local ground and the load ground.

How does the Silent Switcher 2 architecture in the LTC3310SEV#WPBF reduce EMI?

The LTC3310SEV#WPBF integrates internal bypass capacitors between VIN–PGND and VIN–AGND, minimizing high-di/dt loop area and eliminating sensitivity to external ceramic placement. Combined with symmetrical SW pin layout and matched internal power paths, this achieves >20dB lower radiated emissions than Silent Switcher 1 devices - meeting CISPR25 Class 5 without added filters or shielding.

Can the LTC3310SEV#WPBF be synchronized to an external clock?

Yes, the MODE/SYNC pin of the LTC3310SEV#WPBF accepts an external square-wave clock from 0.5MHz to 2.25MHz to synchronize switching frequency. During sync, the internal PLL locks to the external source's rising edge, automatically adapts slope compensation, and maintains pulse-skip operation - essential for noise-sensitive RF and audio systems.

What protection features are built into the LTC3310SEV#WPBF?

The LTC3310SEV#WPBF includes output overvoltage protection (106–112.5% VOUT), output short-circuit recovery with soft-start re-initiation, thermal shutdown, die temperature monitoring via SSTT pin, power-good reporting with 100µs delay, and dual overcurrent detection (top-switch peak limit and bottom-switch valley limit) to safely handle inductor saturation and overload faults.