Analog Devices Inc. LT3667HMSE#PBF

Overview

LT3667HMSE#PBF from Analog Devices is a 40V monolithic triple power supply that combines a 400mA step-down switching regulator with two 200mA fault-protected low dropout linear regulators. The device is designed for systems that need several regulated rails from a wide input source while keeping the power supply compact, efficient, and protected against harsh supply or load conditions.

As part of the Analog Devices LT3667 family, LT3667HMSE#PBF integrates a high-efficiency buck regulator, dual programmable-current-limit LDOs, low-ripple Burst Mode operation, power-good indicators, and fault protection for automotive and industrial power rails. For engineers reviewing the LT3667HMSE#PBF datasheet, LT3667HMSE#PBF pinout, LT3667HMSE#PBF application, or LT3667HMSE#PBF equivalent, this device is widely used in automotive battery regulation, portable instrumentation, industrial supplies, fault-protected sensor rails, and compact triple-output embedded power architectures.

Technical Context

In automotive and industrial electronic systems, LT3667HMSE#PBF operates as a triple-output supply that generates one switching-regulator rail and two post-regulated LDO rails from a high-voltage input. The buck regulator supports 4.3V to 40V input operation and uses current-mode control to improve transient response and loop stability.

The two 200mA LDO regulators are useful for clean secondary rails, sensor supplies, analog bias rails, or local post regulation from the switching output. Their programmable current limits and fault protection to high positive or negative voltages make the device especially useful when external connectors, sensors, or field wiring can expose the supply pins to abnormal conditions.

LT3667HMSE#PBF is commonly used in 12V and 24V battery-powered equipment, automotive modules, industrial controllers, portable instruments, sensor-interface boards, and embedded systems that need low standby current, protected auxiliary rails, and a small three-output power solution using only one inductor.

Key Specifications

Pinout & Package

The LT3667HMSE#PBF pinout is organized around the high-voltage buck converter, two LDO regulator channels, enable and undervoltage control, power-good reporting, and thermal ground connections.

For PCB design, the buck inductor, catch diode path, input capacitor, and output capacitor should be placed close to the IC to reduce switching-loop area. LDO output capacitors and current-limit networks should be routed cleanly because the LDO rails may supply noise-sensitive sensors or analog circuitry.

Key Features

• Triple-output architecture creates one switching rail and two low-noise LDO rails from a compact IC.
• 400mA buck regulator supports high-voltage automotive and industrial input supplies.
• Dual 200mA fault-protected LDOs support robust sensor and auxiliary rail design.
• Low-ripple Burst Mode operation improves light-load efficiency while controlling output ripple.
• Power-good indicators and programmable undervoltage lockout simplify rail sequencing.
• Reverse-battery, current-limit, thermal, and reverse-current protection improve field reliability.

Applications

Equivalent & Alternatives

When evaluating a LT3667HMSE#PBF equivalent, engineers should compare the 40V buck input range, 400mA buck output, dual 200mA fault-protected LDOs, light-load current, switching-frequency range, package, and protection behavior.

Compared with LT3667IMSE#PBF, LT3667HMSE#PBF should be selected when the BOM specifically requires the HMSE orderable suffix and associated package or grade. LT3667HMSE#PBF vs LT3668 selection depends on whether the design needs the LT3667 dual fault-protected LDO structure or a different multi-output regulator architecture.

Quality

LT3667HMSE#PBF should be sourced as original Analog Devices components through traceable and controlled supply channels. Quality checks may include package inspection, top-mark validation, moisture-sensitivity handling review, solderability testing, and electrical testing of buck and LDO outputs.

Because the device combines high-voltage switching conversion with protected LDO rails, production validation should include startup behavior, output accuracy, load-transient response, LDO current-limit behavior, thermal performance, EMI-sensitive layout review, and fault-condition testing on the target PCB.

Availability

LT3667HMSE#PBF available at Aetrix Electronics and is suitable for automotive, industrial, instrumentation, and sensor-supply designs requiring a compact protected triple-output power solution.

Supply support may include volume procurement planning, scheduled delivery arrangements, traceable sourcing management, and long-term supply support for OEM, industrial electronics, automotive electronics, and embedded product programs. Sample and NPI supply support, as well as urgent in-stock supply support, can also be arranged for prototype builds, pilot runs, and time-critical production needs.

For production builds, confirming package suffix, temperature grade, rail-current requirements, LDO protection needs, lead time, lifecycle status, and sourcing continuity helps reduce procurement risk and improve manufacturing stability.

Manufacturer

Analog Devices is a global semiconductor manufacturer specializing in analog ICs, power management, mixed-signal products, data converters, RF solutions, sensors, and embedded signal-chain technologies for industrial, communication, automotive, healthcare, and consumer applications.

The LT3667 product family is a high-voltage triple-output power-supply series integrating a step-down switching regulator with two fault-protected LDO regulators, making it suitable for automotive, industrial, and sensor-supply applications requiring compact protected power rails.

FAQ

What is LT3667HMSE#PBF used for?

LT3667HMSE#PBF is used for automotive battery regulation, industrial supplies, portable instrumentation, and protected sensor rails requiring one buck regulator and two LDO outputs.

Where can I find the LT3667HMSE#PBF datasheet download?

The LT3667HMSE#PBF datasheet is available from Analog Devices and covers electrical specifications, pin functions, protection behavior, package data, and PCB layout guidance.

What should be considered in LT3667HMSE#PBF pinout design?

Designers should keep the buck switching loop compact, separate noisy switching nodes from feedback routing, provide solid thermal grounding, and route LDO output capacitors close to their pins.

Does LT3667HMSE#PBF include fault-protected LDOs?

Yes. The LT3667 family includes two 200mA LDO regulators with programmable current limits and fault-protected behavior for robust auxiliary rails.

What are common LT3667HMSE#PBF equivalent solutions?

Common alternatives include LT3667 same-family orderable variants and related Analog Devices multi-output regulator families selected according to rail count, current rating, package, and protection requirements.