Analog Devices Inc. LT8364IMSE#PBF

Overview

LT8364IMSE#PBF from Analog Devices is a 60V, 4A current-mode DC/DC converter IC supporting boost, SEPIC, and inverting topologies with single-feedback-pin configuration. It operates from 2.8V to 60V input, delivers ultralow 9µA quiescent current in Burst Mode, and achieves up to 2MHz switching frequency - enabling compact, high-efficiency power supplies for automotive infotainment head units requiring wide VIN range and low standby power.

For engineers reviewing the LT8364IMSE#PBF datasheet, LT8364IMSE#PBF pinout, LT8364IMSE#PBF application, or LT8364IMSE#PBF equivalent, key selection criteria include its 60V/4A integrated switch rating, programmable UVLO via EN/UVLO pin, BIAS pin for efficiency optimization, spread-spectrum EMI reduction, and thermally enhanced MSOP-16 package with exposed PGND pad.

Technical Context

The LT8364IMSE#PBF implements fixed-frequency current-mode control with dual error amplifiers (A1/A2) enabling seamless positive or negative output regulation using one FBX pin - A1 active for boost/SEPIC (1.60V reference), A2 active for inverting (–0.80V reference). Its oscillator supports 300kHz–2MHz programming via RT resistor and includes frequency foldback during overload.

Five SYNC/MODE pin states configure operation: ground (<0.14V) enables low-ripple Burst Mode; floating selects pulse-skip; 100k-to-GND enables Burst + SSFM; INTVCC (>1.7V) enables pulse-skip + SSFM; external clock synchronizes switching. The BIAS pin supplies INTVCC when 4.4V ≤ BIAS ≤ VIN, reducing VIN current draw and improving full-load efficiency.

Key Specifications

Pinout & Package

LT8364IMSE#PBF is housed in a thermally enhanced 16-lead plastic MSOP package with four pins removed (MSE16 variation), featuring an exposed PGND/GND pad (Pin 17) that must be soldered to PCB for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar DC/DC controller applications.

Compared with LTC3789EMSE#PBF and LT8330EMSE#PBF, the LT8364IMSE#PBF uniquely integrates a 60V/4A switch while retaining single-FBX topology agility and ultralow 9µA quiescent current - making it optimal for mid-power (0.5–3A), space-limited, and battery-sensitive applications where discrete FETs add cost and layout risk.

Availability

LT8364IMSE#PBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial sensor transmitters, portable medical imaging, and telecom remote radio units requiring stable component supply across extended temperature and long product lifecycles.

Supply support for LT8364IMSE#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 precision instrumentation, industrial automation, and automotive safety markets since 1965.

The LT8364IMSE#PBF belongs to Analog Devices' Power by Linear™ family of monolithic DC/DC converters designed specifically for high-voltage, wide-input industrial and automotive power conversion with minimal external components and robust fault protection.

FAQ

What topology configurations does the LT8364IMSE#PBF support?

The LT8364IMSE#PBF supports boost, SEPIC, and inverting converter topologies using a single FBX feedback pin. For boost and SEPIC, the internal reference is +1.60V; for inverting operation, it switches to –0.80V. This eliminates the need for topology-specific feedback networks and enables flexible design reuse across different output voltage polarities and isolation requirements in the same platform.

How does the BIAS pin improve efficiency in the LT8364IMSE#PBF?

The BIAS pin on the LT8364IMSE#PBF supplies the INTVCC regulator when 4.4V ≤ BIAS ≤ VIN, diverting up to 1.2mA of internal bias current away from the main VIN rail. In SEPIC applications where VOUT ≈ VIN, connecting BIAS to VOUT reduces total input current by ~1mA at 24V input - improving full-load efficiency by up to 3.5% and lowering thermal stress on the input capacitor and traces.

What is the minimum recommended output capacitance for stable Burst Mode operation in the LT8364IMSE#PBF?

For stable Burst Mode operation with <15mV output ripple, the LT8364IMSE#PBF requires ≥22µF of low-ESR ceramic capacitance at the output. This value assumes typical 48V output, 12V input, and 300mA load. Increasing capacitance beyond 47µF further reduces ripple proportionally - critical for noise-sensitive analog circuits like ADC references or RF synthesizers powered from the same rail.

Can the LT8364IMSE#PBF be synchronized to an external clock, and what are the voltage requirements?

Yes, the LT8364IMSE#PBF can be synchronized to an external clock via the SYNC/MODE pin. The input square wave must have valleys <0.4V and peaks >1.7V (up to 6V), with 20–80% duty cycle. Synchronization is supported from 300kHz to 2MHz. When synchronized, the device operates in pulse-skip mode instead of Burst Mode - maintaining regulation at light loads while aligning switching edges to reduce beat frequencies in multi-converter systems.

What thermal considerations apply to the LT8364IMSE#PBF's exposed pad in the MSOP-16 package?

LT8364IMSE#PBF's exposed pad (Pin 17) is electrically PGND/GND and thermally critical - it must be soldered to a minimum 200mm² solid copper plane using ≥6 thermal vias (0.3mm diameter) to an inner ground layer. With this layout, the device sustains 3W continuous power dissipation at 85°C ambient. Insufficient pad soldering increases θ_JA beyond 45°C/W, risking thermal shutdown above 110°C junction temperature during sustained 2A output.