Analog Devices Inc. LT8364HMSE#WTRPBF

Overview

LT8364HMSE#WTRPBF from Analog Devices is a high-voltage, 4A current-mode DC/DC converter IC supporting boost, SEPIC, and inverting topologies with a single feedback pin. It operates from 2.8V to 60V input, delivers up to 48V output, features 9µA Burst Mode quiescent current, 60V/4A integrated switch, and AEC-Q100 qualified operation up to 150°C junction temperature - used in automotive infotainment power rails and industrial sensor transmitters.

For engineers reviewing the LT8364HMSE#WTRPBF datasheet, LT8364HMSE#WTRPBF pinout, LT8364HMSE#WTRPBF application, or LT8364HMSE#WTRPBF equivalent, this page provides verified topology flexibility (positive/negative output), thermal performance data for 150°C automotive environments, real-world EMI mitigation via SSFM, and validated soft-start/UVLO programming methods - all specific to the HMSE package variant.

Technical Context

The LT8364HMSE#WTRPBF implements fixed-frequency current-mode control with programmable 300kHz–2MHz switching via RT resistor, and supports five distinct SYNC/MODE configurations: Burst Mode (≤9µA IQ), pulse-skip, external clock sync, and two Spread Spectrum Frequency Modulation (SSFM) variants. Its dual-amplifier FBX architecture enables seamless positive (1.6V reference) or negative (–0.8V reference) output regulation using identical pin connections.

Thermal design is defined by its 16-lead MSOP package with exposed PGND/GND pad (θJC = 10°C/W), rated for –40°C to +150°C junction temperature, and includes frequency foldback, BIAS-pin-assisted INTVCC sourcing (4.4V–VIN), and overtemperature shutdown at >170°C - all confirmed for the HMSE grade in the official Rev. B datasheet.

Key Specifications

Pinout & Package

LT8364HMSE#WTRPBF uses a thermally enhanced 16-lead MSOP package (MSE16 variation) with four pins removed (pins 2, 4, 15, and 16 are NC), featuring an exposed PGND/GND pad (Pin 17) that must be soldered to PCB for thermal and electrical integrity. θJA = 45°C/W, θJC = 10°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC3789EMSE#PBF and MAX20404ATPA/VY+, the LT8364HMSE#WTRPBF uniquely integrates a 60V/4A switch with AEC-Q100 H-grade qualification, single-pin topology selection, and SSFM - making it the only option among the three qualified for under-hood automotive boost converters requiring 48V output and <9µA quiescent current.

Availability

LT8364HMSE#WTRPBF is available at Aetrix Electronics and suitable for automotive infotainment power supplies, industrial sensor transmitters, and medical portable imaging equipment requiring stable component supply with AEC-Q100 qualification and extended temperature support.

Supply support for LT8364HMSE#WTRPBF 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 leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision, power, and connectivity applications.

The LT8364 product line delivers highly integrated, thermally robust DC/DC controllers for automotive, industrial, and medical systems demanding wide input range, ultra-low IQ, and topology flexibility - with the HMSE variant specifically engineered for AEC-Q100-compliant 150°C environments.

FAQ

What topology configurations does the LT8364HMSE#WTRPBF support?

The LT8364HMSE#WTRPBF supports boost, SEPIC, and inverting configurations using a single FBX pin with dual internal references (+1.60V for positive outputs, –0.80V for negative outputs). This eliminates topology-specific feedback networks and enables one schematic to serve multiple output polarity requirements. The LT8364HMSE#WTRPBF achieves this through internal amplifier selection logic that activates either A1 (inverting) or A2 (non-inverting) based on FBX voltage polarity - confirmed in the Block Diagram and Applications Information sections of the Rev. B datasheet.

How does the BIAS pin improve efficiency in the LT8364HMSE#WTRPBF?

The BIAS pin on the LT8364HMSE#WTRPBF supplies the INTVCC regulator when 4.4V ≤ BIAS ≤ VIN, reducing VIN current draw and improving full-load efficiency by 1.5–2.2%. In SEPIC applications where VOUT often exceeds VIN, connecting BIAS to VOUT offloads INTVCC current entirely from the input rail. The LT8364HMSE#WTRPBF automatically selects between VIN and BIAS sources - no external control logic is needed. This feature is validated in Electrical Characteristics tables and Application Circuits showing BIAS = VOUT configurations.

What is the maximum operating temperature for the LT8364HMSE#WTRPBF?

The LT8364HMSE#WTRPBF is rated for –40°C to +150°C junction temperature and is AEC-Q100 qualified for automotive applications. This H-grade rating is explicitly specified in the ORDER INFORMATION table and confirmed in Note 3 of the Electrical Characteristics section. The 16-lead MSOP package with exposed thermal pad (θJC = 10°C/W) enables reliable operation at 150°C junction temperature when properly soldered to a PCB ground plane - distinguishing it from E/I-grade variants limited to 125°C.

Can the LT8364HMSE#WTRPBF synchronize to an external clock?

Yes, the LT8364HMSE#WTRPBF can synchronize to an external clock via the SYNC/MODE pin (Pin 9). When driven with a square wave (20–80% duty cycle, 0.4V–6V amplitude), the LT8364HMSE#WTRPBF locks its oscillator to the external frequency while maintaining pulse-skipping mode for light-load regulation. Synchronization is supported from 300kHz to 2MHz, and the RT resistor must be selected for a frequency equal to or below the lowest expected sync input - details are provided in the Synchronization and Mode Selection section of the Rev. B datasheet.

What is the purpose of the exposed pad on the LT8364HMSE#WTRPBF package?

The exposed pad (Pin 17) on the LT8364HMSE#WTRPBF is electrically PGND/GND and serves as the primary thermal path, with θJC = 10°C/W. It must be soldered to a continuous PCB ground plane to ensure safe operation at 150°C junction temperature and to handle >3W continuous power dissipation. The pad also provides low-inductance grounding for SW nodes and minimizes EMI - per the MSE PACKAGE diagram and Thermal Characteristics notes in the Rev. B datasheet. Failure to solder this pad invalidates the thermal and electrical specifications of the LT8364HMSE#WTRPBF.