Analog Devices LT8610EMSE#TRPBF – 42 V, 2.5 A Synchronous Buck Regulator with 2.5 µA Quiescent Current

The Analog Devices LT8610EMSE#TRPBF is a monolithic, synchronous step-down (buck) regulator designed for high-efficiency conversion from wide input supplies while maintaining an ultralow idle draw. With a 42 V maximum input rating, up to 2.5 A output capability, and just 2.5 µA typical quiescent current in Burst Mode operation, the LT8610 series is well suited to industrial, portable, and distributed point‑of‑load power systems where board area and standby power are at a premium.

This ordering code denotes the E-grade device in the compact 16-lead MSOP package with an exposed thermal pad (MSE), shipped in tape-and-reel and finished Pb-free for RoHS compliance. If you’re designing for robust input surge conditions, battery-powered longevity, or high-density power rails, the LT8610EMSE#TRPBF offers a practical balance of performance, simplicity, and footprint.

Why engineers and sourcing teams choose LT8610EMSE#TRPBF

• Wide input headroom to 42 V helps tolerate automotive/industrial transients and diverse supply rails.
• 2.5 A output current supports a broad range of point-of-load rails for MCUs, FPGAs, sensors, and communications ICs.
• Ultralow 2.5 µA quiescent current (typical, no-load, Burst Mode) minimizes battery drain in idle or always-on subsystems.
• Synchronous rectification improves conversion efficiency versus asynchronous topologies, especially at higher load currents.
• Compact 16-lead MSOP with exposed pad saves board area while enabling effective thermal dissipation through the PCB.
• Surface-mount, tape-and-reel packaging streamlines automated assembly and volume production.

Key specifications at a glance

• Brand / Manufacturer: Analog Devices
• Series: LT8610
• MPN: LT8610EMSE#TRPBF
• Category: PMIC – Voltage Regulators – DC-DC Switching Regulators
• Topology: Buck (Step-Down)
• Input Voltage (Max): 42 V
• Output Current (Max): 2.5 A
• Quiescent Current: 2.5 µA (typical, no-load, Burst Mode)
• Synchronous Rectification: Yes
• Package: 16-Lead MSOP with Exposed Pad (MSE)
• Mounting Type: Surface Mount
• Pin Count: 16
• Operating Temperature Range: -40°C to +125°C (E-grade, junction)
• RoHS Status: RoHS Compliant, Pb-free (#PBF)

Not specified in datasheet (in the provided data): output voltage range, switching frequency, current limit, soft-start behavior, UVLO thresholds, and protections. Refer to the datasheet for complete electrical characteristics and design curves.

Where the LT8610 fits best

The LT8610EMSE#TRPBF is a compelling choice when your design must balance wide input capability, strong efficiency, and very low standby consumption.

• Battery-powered and portable systems: Extend battery life by keeping idle current to microamp levels while retaining fast wake-up and reliable regulation when loads return.
• Industrial power supplies: Tolerate high input rails and field conditions up to 42 V while delivering a regulated local rail without large thermal overhead.
• Distributed point-of-load regulation: Generate board-level rails efficiently near the load to minimize distribution losses and improve transient response.
• General-purpose step-down conversion: Use as a flexible building block in mixed-signal and embedded platforms.

How the LT8610 delivers value

• Efficiency from light to heavy load: Synchronous operation lowers conduction losses at higher currents. At light load, Burst Mode dramatically reduces switching and control overhead to achieve 2.5 µA typical quiescent draw (no-load), helping you meet stringent standby budgets.
• Compact thermal solution: The MSE package’s exposed paddle allows direct heat flow into the PCB. With proper copper and vias, designers can meet thermal targets without resorting to larger packages.
• Simplified sourcing and assembly: The LT8610EMSE#TRPBF ships in tape-and-reel (TR), Pb-free, RoHS-compliant form and is optimized for modern SMT manufacturing flows.

Package, layout, and thermal guidance

• Package format: 16-lead MSOP with exposed pad (MSE). The exposed pad should be soldered to a suitably sized copper area and stitched to internal planes with thermal vias to lower junction temperature and improve reliability.
• Board considerations:
• Keep the high di/dt loop (input cap, switch node, and rectifier path) tight and compact.
• Place input capacitors as close as possible to VIN and ground pins.
• Use a solid ground reference. Connect the exposed pad to ground for both thermal and electrical performance.
• Route sensitive feedback traces away from the switch node and noisy gates.
• Thermal range: E-grade junction temperature rating of -40°C to +125°C supports industrial environments. Actual board-level thermal limits depend on copper area, airflow, and ambient conditions.

Design-in tips you can apply immediately

While exact component values must come from your target operating point and the datasheet’s design equations/curves, these general steps streamline evaluation:

1. Define input and output targets: Determine VIN range up to 42 V and the required VOUT and load profile up to 2.5 A.
2. Select inductance and switching behavior: Choose an inductor to balance current ripple and transient response per datasheet guidance. Verify saturation current exceeds peak inductor current.
3. Input and output capacitors: Size input capacitors for RMS current and transient demands; choose low-ESR output capacitors to control ripple and achieve transient targets.
4. Compensation and stability: Follow datasheet recommendations to ensure stable operation across line/load conditions. Validate with Bode plots where applicable.
5. EMI awareness: Use compact loops, appropriate snubbing if recommended, and solid grounding. Maintain adequate spacing of the switch node from sensitive nets.
6. Thermal validation: Measure case and PCB temperatures at worst-case ambient and load. Increase copper area or airflow if junction approaches limits.

Not specified in datasheet (in the provided data): switching frequency options, soft-start, and protections. Consult the LT8610 datasheet for application circuits, design curves, and any programmable features before finalizing component choices.

Lifecycle, availability, and ordering

• Lifecycle status: Active (per Analog Devices product page in the provided data).
• Availability: Inventory fluctuates; check authorized distributors for current stock. The snapshot provided lists inventory_quantity as 0; availability can change rapidly.
• Ordering code breakdown:
• LT8610: Series/functional family
• E: E-grade (-40°C to +125°C junction)
• MSE: 16-lead MSOP package with exposed pad
• #TR: Tape-and-reel packaging
• PBF: Pb-free, RoHS-compliant finish

For volume commitments or lifecycle risk assessment, align with your procurement team and Analog Devices’ authorized channel to confirm lead times and any supply constraints.

Compliance and environmental

• RoHS: Compliant. The #PBF suffix indicates Pb-free finish.
• Halogen content, REACH, and other environmental details: Not specified in datasheet. Consult the manufacturer’s product page or compliance documentation for full material disclosures and declarations.

Specifications summary

• Topology: Buck (Step-Down)
• Input Voltage (Max): 42 V
• Output Current (Max): 2.5 A
• Quiescent Current: 2.5 µA (typical, no-load, Burst Mode)
• Synchronous Rectification: Yes
• Package: 16-Lead MSOP with Exposed Pad (MSE)
• Mounting: Surface Mount
• Pin Count: 16
• Operating Temp (Junction): -40°C to +125°C (E-grade)

Not specified in datasheet (in the provided data): output voltage range, switching frequency, soft-start, protections, and accuracy metrics.

Applications

• Industrial power supplies
• Battery-powered/portable systems
• Distributed point-of-load regulation
• General-purpose step-down conversion

These application spaces routinely benefit from the LT8610’s combination of 42 V input capability, 2.5 A output, synchronous efficiency, and extremely low quiescent current.

Sourcing checklist for the LT8610EMSE#TRPBF

• Confirm electrical envelope: VIN max (42 V), IOUT max (2.5 A), and quiescent current requirements.
• Validate thermal margin: Ensure your board stack-up and copper areas keep Tj within E‑grade limits under worst-case conditions.
• Verify packaging and finishing: 16-lead MSOP with exposed pad, tape-and-reel, Pb-free (#PBF), RoHS compliant.
• Check lifecycle and alternates: Listed as Active in the provided data; no official replacements are specified.
• Procure through authorized channels: Reduces supply risk and ensures traceability and quality.

Frequently asked questions (FAQs)

• What does the #TRPBF suffix mean?

• TR indicates tape-and-reel packaging; PBF denotes Pb-free, RoHS-compliant finish.

• What package is LT8610EMSE#TRPBF supplied in?

• 16-lead MSOP with exposed thermal pad (MSE).

• What is the maximum input voltage?

• Up to 42 V (per datasheet and product family information).

• Is the LT8610 a synchronous regulator?

• Yes. Synchronous rectification is specified.

• What is the operating temperature range for this ordering code?

• E-grade junction rating: -40°C to +125°C.

• What is the typical quiescent current in idle?

• 2.5 µA (typical, no-load) in Burst Mode operation.

• Are there listed drop-in replacements?

• Not specified in datasheet. No replacements are provided in the supplied data.

• What switching frequency should I design around?

• Not specified in datasheet (in the provided data). Refer to the official datasheet for frequency options, associated trade-offs, and design examples.

Resources

• Product page: https://www.analog.com/en/products/lt8610.html
• Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/lt8610.pdf

Conclusion

If your design demands a robust, compact, and efficient step-down converter that minimizes standby draw, the Analog Devices LT8610EMSE#TRPBF stands out. Its 42 V input rating, 2.5 A output capability, synchronous architecture, and 2.5 µA typical quiescent current (Burst Mode) address the needs of industrial, portable, and distributed point-of-load applications. The 16-lead MSOP with exposed pad enables dense layouts without sacrificing thermal performance, while Pb-free, RoHS-compliant tape-and-reel packaging simplifies assembly and compliance.

For final component selection and optimization, consult the LT8610 datasheet and prototype with your worst-case operating conditions. When you’re ready to source, work with authorized distributors to confirm current availability and lead times for the LT8610EMSE#TRPBF.