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Analog Devices Inc. LT8610ACEMSE-1#PBF
- Part No.:
- LT8610ACEMSE-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610ACEMSE-1#PBF.pdf
- Description:
- IC REG BUCK ADJ 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:405
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Product details
Overview
LT8610ACEMSE-1#PBF from Analog Devices is a 42V, 3.5A synchronous step-down regulator with 2.5µA quiescent current in Burst Mode, 0.80V feedback reference, 3V minimum input voltage, and internal compensation optimized for 1.5MHz–2.2MHz operation. It delivers high efficiency (95% at 1A/5VOUT from 12VIN) and low dropout (200mV at 1A) for automotive power supplies and industrial DC/DC conversion.
For engineers reviewing the LT8610ACEMSE-1#PBF datasheet, LT8610ACEMSE-1#PBF pinout, LT8610ACEMSE-1#PBF application, or LT8610ACEMSE-1#PBF equivalent, key selection criteria include its AEC-Q100 qualification, soft-start on dropout recovery, ±8% power-good threshold accuracy, 30ns minimum on-time, and MSOP-16 thermally enhanced package with exposed GND pad.
Technical Context
The LT8610ACEMSE-1#PBF implements constant-frequency current-mode control with internal 0.80V reference and programmable switching frequency (1.5–2.2MHz via RT resistor). Its optimized internal compensation enables faster transient response versus the LT8610AC variant, particularly under 2MHz operation.
It features dual-mode operation: ultralow-IQ Burst Mode (2.5µA no-load) for battery-sensitive systems, and pulse-skipping mode (enabled via SYNC pin) for reduced output ripple. The TR/SS pin includes an active discharge circuit to suppress overshoot during dropout/brownout recovery - a distinguishing feature of the "-1" variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - supports wide-range industrial and automotive battery inputs including cold-crank (≥3V start-up). |
| Output Current | 3.5A continuous - sufficient for powering microcontrollers, sensors, and interface ICs without external boost stages. |
| Quiescent Current | 2.5µA at no load (12VIN→3.3VOUT) - enables >1-year battery life in always-on IoT nodes. |
| Feedback Reference | 0.800V ±6mV - enables precise low-output-voltage regulation (e.g., 1.2V, 1.8V) with minimal divider current error. |
| Min On-Time | 30ns - allows high step-down ratios (e.g., 42V→3.3V) at 2MHz without pulse skipping. |
| Switching Frequency | 1.5MHz to 2.2MHz (RT-programmable) - supports compact LC filtering with 2.2µH inductors and <10µF ceramic output caps. |
| Power-Good Accuracy | ±8% relative to FB voltage - provides reliable system reset signaling without external monitoring circuitry. |
Pinout & Package
LT8610ACEMSE-1#PBF uses a 16-lead plastic MSOP package with exposed thermal pad (Pin 17 = GND), θJA = 40°C/W. The exposed pad must be soldered to PCB for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock synchronization input | Enables pulse-skipping mode or external frequency lock; floating prohibited - tie low for Burst Mode. |
| TR/SS (2) | Soft-start and tracking control | Programs VOUT ramp rate via capacitor; actively discharges during dropout recovery to limit overshoot (LT8610AC-1 specific). |
| RT (3) | Frequency programming resistor | Resistor to GND sets switching frequency (1.5–2.2MHz); determines minimum load before full-frequency operation. |
| EN/UV (4) | Enable and undervoltage lockout | Hysteretic threshold (1.015V rise / 0.97V fall) enables VIN brownout protection and controlled startup. |
| VIN (5,6) | Main input power supply | Supplies internal circuitry and top switch; requires local 1µF ceramic bypass close to pins. |
| NC (7) | No connect | Not bonded internally - leave unconnected or ground per layout best practice. |
| GND (8) | Signal and power return | Return path for bottom switch and control logic; must be tied to exposed pad (Pin 17). |
| SW (9,10,11) | Power switch node | Drives external inductor; multiple pins reduce resistance and improve thermal spreading. |
| BST (12) | Bootstrap supply | Requires 0.1µF ceramic capacitor to SW for high-side gate drive; critical for MOSFET turn-on. |
| INTVCC (13) | Internal 3.4V regulator output | Bypass with ≥1µF ceramic; powers internal logic; sourcing shifts to BIAS if VBIAS > 3.1V. |
| BIAS (14) | Efficiency-optimized bias supply | Connect to VOUT ≥3.3V to reduce VIN current draw and improve light-load efficiency. |
| PG (15) | Power-good open-drain flag | Pulls low when VOUT deviates >±8% from regulation or fault occurs; valid above 3.0VIN regardless of EN state. |
| FB (16) | Feedback reference input | Regulated to 0.800V; connects to resistor divider tap; phase-lead cap (4.7–10pF) recommended for stability. |
| GND (17) | Exposed thermal pad | Must be soldered to PCB copper pour for thermal dissipation (θJC(PAD) = 10°C/W) and low-impedance GND return. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Rated for automotive applications (–40°C to +125°C junction), with production flow and reliability testing per automotive standards. |
| Dropout recovery soft-start | TR/SS pin discharge circuit actively regulates TR/SS to match FB voltage during brownout exit, suppressing output overshoot by >30% vs LT8610AC. |
| Ultralow-IQ Burst Mode | 2.5µA input current at no load enables multi-year battery operation in always-on telematics and sensor modules. |
| High-frequency optimized loop | Internal compensation tuned for 1.5–2.2MHz operation improves transient response bandwidth by ~2× vs LT8610AC at same frequency. |
| Robust overcurrent protection | Top switch current limit of 6.7A (typ) and bottom switch limit of 4.3A (typ) safely tolerate inductor saturation during overload. |
Applications
| Automotive Infotainment Power | GSM Base Station RF Module Supply |
|---|---|
Use Scenario: Powering SoC, display controller, and audio codec in head-unit with 12V battery input subject to cold-crank and load-dump transients. IC Role / Device Role / Timing Role: Primary 3.3V/2.5A buck regulator with AEC-Q100 qualification, PG flag for system reset, and 3V min VIN enabling operation during cranking. Use Value: 2.5µA IQ extends backup battery life; ±8% PG accuracy ensures reliable MCU reset; 30ns min on-time maintains regulation at 42V→3.3V @ 2MHz. | Use Scenario: Generating stable 5V rail for PA bias and transceiver ICs in outdoor GSM base station radios operating from 24–48V telecom supply. IC Role / Device Role / Timing Role: High-efficiency, EMI-optimized step-down converter with SYNC input for clock alignment across multiple rails. Use Value: 95% efficiency at 1A reduces thermal load in sealed enclosures; improved EMI performance meets EN55022 Class B; 42V max VIN handles telecom surges. |
| Industrial PLC I/O Module | Medical Portable Diagnostic Device |
Use Scenario: Providing isolated 3.3V logic supply and 5V analog rail in DIN-rail mounted PLC with wide-input 18–36V DC field power. IC Role / Device Role / Timing Role: Dual-output capable (with external LDOs) primary regulator with UVLO, PG, and thermal shutdown. Use Value: 3.0V min VIN ensures operation during brownouts; 200mV dropout at 1A maintains regulation under high-current transients; MSOP-16 fits dense PCB layouts. | Use Scenario: Battery-powered ultrasound probe requiring ultra-low standby power and fast wake-up from sleep mode. IC Role / Device Role / Timing Role: Main system power regulator with Burst Mode for sub-µA sleep current and soft-start for clean power sequencing. Use Value: 2.5µA IQ enables >18-month shelf life on single Li-ion cell; TR/SS-controlled ramp prevents sensor bias disruption; AEC-Q100 grade supports medical reliability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8610ACEMSE#PBF | Same package and pinout; 0.80V FB, but standard compensation (200kHz–2.2MHz range, no dropout-recovery soft-start). | Lacks TR/SS discharge circuit and high-frequency loop optimization - less suitable for 2MHz designs requiring tight transient control. | Select when cost sensitivity outweighs need for enhanced transient response or dropout recovery behavior. |
| LM5164QPWPRQ1 | 42V, 1A buck with 15µA IQ; 3.5V–42V input; no 0.8V FB; uses external compensation. | Lower output current and higher IQ; requires external loop compensation; not AEC-Q100 qualified in Q1 grade. | Select only for lower-current (<1A), non-automotive applications where footprint and cost are prioritized over efficiency and qualification. |
Compared with LT8610ACEMSE#PBF, the LT8610ACEMSE-1#PBF adds critical dropout-recovery soft-start and higher-bandwidth control for 2MHz operation - making it preferred for automotive infotainment and portable medical devices where output stability during line transients is essential. Compared with LM5164QPWPRQ1, it delivers 3.5× higher current, 6× lower IQ, and full AEC-Q100 compliance - justifying its use in safety-critical, high-reliability systems.
Availability
LT8610ACEMSE-1#PBF is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC power supplies, and portable medical diagnostics requiring stable component supply, AEC-Q100 qualification, and ultralow quiescent current.
Supply support for LT8610ACEMSE-1#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 industrial, automotive, communications, and healthcare markets.
The LT8610AC/LT8610AC-1 belongs to Analog Devices' Silent Switcher®-compatible monolithic buck regulator family, designed specifically for noise-sensitive automotive and industrial applications demanding ultralow EMI, high efficiency at light loads, and robust operation across extreme input voltages.
FAQ
What is the minimum input voltage required for LT8610ACEMSE-1#PBF to regulate?
The LT8610ACEMSE-1#PBF has a guaranteed minimum input voltage of 3.0V, with typical operation down to 2.6V. This enables reliable startup and regulation during automotive cold-crank events where battery voltage dips below 6V. Operation below 3.0V may result in dropout or loss of regulation, and is not characterized across temperature.
How does the LT8610ACEMSE-1#PBF differ from the LT8610ACEMSE#PBF?
The LT8610ACEMSE-1#PBF features internal compensation optimized for higher switching frequencies (1.5–2.2MHz vs 200kHz–2.2MHz) and includes a TR/SS pin discharge circuit that actively pulls TR/SS to FB voltage during dropout recovery - reducing output overshoot. These enhancements improve transient response and stability in high-frequency, high-reliability applications.
Can the LT8610ACEMSE-1#PBF be synchronized to an external clock?
Yes, the LT8610ACEMSE-1#PBF supports external clock synchronization via the SYNC pin (Pin 1). When driven with a logic-level square wave between 1.5MHz and 2.2MHz, the device locks its switching frequency and phase to the external source - enabling EMI reduction through frequency dithering or deterministic timing in multi-rail systems.
What is the purpose of the BIAS pin on the LT8610ACEMSE-1#PBF?
The BIAS pin on the LT8610ACEMSE-1#PBF allows the internal regulator to draw bias current from the output rail (if ≥3.3V) instead of VIN, reducing input supply current and improving light-load efficiency. When VBIAS > 3.1V, INTVCC sourcing shifts from VIN to BIAS - lowering total system power consumption in fixed-output applications.
Is the LT8610ACEMSE-1#PBF qualified for automotive applications?
Yes, the LT8610ACEMSE-1#PBF is AEC-Q100 qualified for automotive applications (Grade 1: –40°C to +125°C junction temperature). It undergoes stress testing per automotive reliability standards and is manufactured in controlled processes supporting automotive quality requirements - making it suitable for infotainment, ADAS, and body electronics.
LT8610ACEMSE-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 42V
- Current - Output:
- 3.5A
- Frequency - Switching:
- 1.5MHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT8610ACEMSE-1#PBF FAQ
1.How can I place an order for LT8610ACEMSE-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610ACEMSE-1#PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LT8610ACEMSE-1#PBF reliable?
The price and inventory of LT8610ACEMSE-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8610ACEMSE-1#PBF is usually 5 days.
3.What payment methods are accepted for LT8610ACEMSE-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610ACEMSE-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610ACEMSE-1#PBF?
LT8610ACEMSE-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610ACEMSE-1#PBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LT8610ACEMSE-1#PBF?
For technical support, including LT8610ACEMSE-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610ACEMSE-1#PBF requirements.
6.How does Aetrix verify that LT8610ACEMSE-1#PBF is sourced from the original manufacturer or authorized distributors?
All LT8610ACEMSE-1#PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT8610ACEMSE-1#PBF meets industry standards.
7.What is the process for return or replacement of LT8610ACEMSE-1#PBF?
All LT8610ACEMSE-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610ACEMSE-1#PBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LT8610ACEMSE-1#PBF part is unused and in its original packaging.
Return procedure for LT8610ACEMSE-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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