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Analog Devices Inc. LT8610ACIMSE#PBF
- Part No.:
- LT8610ACIMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610ACIMSE#PBF.pdf
- Description:
- IC REG BUCK ADJ 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,989
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Product details
Overview
LT8610ACIMSE#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, 30ns minimum on-time, and AEC-Q100 qualification for automotive applications. It delivers high efficiency (95% at 1A/5V from 12V) and low dropout (200mV at 1A) in a thermally enhanced 16-lead MSOP package.
For engineers reviewing the LT8610ACIMSE#PBF datasheet, LT8610ACIMSE#PBF pinout, LT8610ACIMSE#PBF application, or LT8610ACIMSE#PBF equivalent, this page provides verified specifications, validated pin functions, confirmed automotive-grade thermal performance (–40°C to 125°C), and real-world EMI-optimized switching behavior across 200kHz–2.2MHz.
Technical Context
The LT8610ACIMSE#PBF implements constant-frequency current-mode control with internal 0.80V reference and slope compensation. Its 30ns minimum on-time enables high VIN/VOUT ratios (e.g., 42V→3.3V at 700kHz), while the SYNC pin supports external clock synchronization or pulse-skipping mode.
Burst Mode operation reduces quiescent current to 2.5µA by disabling internal circuitry between output pulses; the TR/SS pin enables programmable soft-start and output tracking, and the PG flag signals ±8% VOUT regulation status and fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - supports wide automotive battery transients and industrial 24V/36V rails without pre-regulation |
| Quiescent Current | 2.5µA at no load - enables >10-year battery life in always-on automotive modules |
| Feedback Reference | 0.800V ±6mV - allows precise low-VOUT regulation (e.g., 1.2V with 1% resistors) and reduces divider current loss |
| Max Output Current | 3.5A continuous - sustains full load under 125°C junction temperature with proper PCB copper |
| Min On-Time | 30ns - enables 42V→3.3V conversion at 700kHz without pulse skipping |
| Switching Frequency | 200kHz to 2.2MHz - adjustable via RT resistor; higher frequencies shrink inductor size but require careful EMI layout |
| Thermal Rating | –40°C to 125°C junction - qualified per AEC-Q100 Grade I for engine bay and infotainment systems |
Pinout & Package
Package: 16-lead plastic MSOP with exposed thermal pad (Pin 17 = GND). θJA = 40°C/W; requires soldered exposed pad for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock input / mode select | Ground for Burst Mode (2.5µA IQ); tie to INTVCC or logic high for pulse-skipping; accept 1.1–2.4V sync signal |
| TR/SS (2) | Soft-start and tracking control | Capacitor here sets VOUT ramp rate; voltage <0.8V forces FB tracking; internal 2.2µA pull-up enables simple RC soft-start |
| RT (3) | Frequency programming | Resistor to GND sets fSW: 221kΩ → 180kHz, 60.4kΩ → 700kHz, 18.2kΩ → 2.0MHz (LT8610AC range) |
| EN/UV (4) | Enable and undervoltage lockout | Hysteretic threshold: 1.015V rising, 0.97V falling - allows precise input brownout detection with resistor divider |
| VIN (5,6) | Main power input | Supplies top switch and internal circuitry; must be locally bypassed with low-ESR ceramic capacitor near pins |
| NC (7) | No connect | Not bonded internally; leave unconnected or ground for mechanical stability |
| GND (8) | Power and signal ground | Return path for bottom switch; must be tied to exposed pad (Pin 17) with multiple vias for thermal and EMI performance |
| SW (9,10,11) | Power switch node | Connects to inductor and BST capacitor; keep trace short and low-inductance to minimize EMI and switching losses |
| BST (12) | Bootstrap supply | 0.1µF ceramic capacitor to SW provides gate drive voltage >VIN for top NMOS; critical for high-side switch conduction |
| INTVCC (13) | Internal 3.4V regulator output | Bypass with ≥1µF ceramic; supplies internal logic; draws current from BIAS if VBIAS >3.1V, else from VIN |
| BIAS (14) | Efficiency-boosting bias supply | Tie to VOUT ≥3.3V to reduce VIN current draw and improve light-load efficiency; bypass with 1µF if sourced externally |
| PG (15) | Power good flag | Open-drain output active low when VOUT is outside ±8% of target or during fault; valid above 3.0V VIN regardless of EN state |
| FB (16) | Feedback input | Regulated to 0.800V; connect resistor divider tap here; add 4.7–10pF phase-lead cap from FB to VOUT for stability |
| GND (17) | Exposed thermal pad | Must be soldered to PCB ground plane; primary thermal path - accounts for >80% of heat dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 2.5µA IQ in Burst Mode enables >10-year battery runtime in always-on automotive telematics and ADAS sensors |
| High-frequency capability | 30ns minimum on-time supports 2MHz+ switching - reduces inductor size by 4× vs 500kHz designs |
| EMI-optimized switching | Controlled slew rates and integrated spread-spectrum-like behavior reduce peak radiated emissions without external filters |
| AEC-Q100 Grade I qualification | Validated for –40°C to +125°C operation with lifetime reliability data - suitable for front-end automotive power rails |
| Programmable soft-start & tracking | TR/SS pin enables monotonic startup into pre-biased outputs and coordinated sequencing with other rails in multi-rail systems |
Applications
| Automotive Infotainment Power | GSM Base Station RF Power |
|---|---|
Use Scenario: Powering SoC core voltage (1.2V/3A) and DDR memory (1.35V/2.5A) in head-unit systems with cold-crank immunity. IC Role / Device Role / Timing Role: Primary buck regulator delivering stable, low-noise core power with fast transient response to CPU load changes. Use Value: 2.5µA quiescent current extends battery backup time during ignition-off; 30ns on-time maintains regulation during 4.5V cold-crank events. | Use Scenario: Generating 5V/3.5A bias for GaN RF power amplifiers in 4G/5G macro base stations with strict EMI limits. IC Role / Device Role / Timing Role: High-efficiency intermediate bus converter operating at 2MHz to avoid AM band interference. Use Value: Integrated EMI reduction eliminates need for external ferrite beads; 42V input withstands telecom -48V system transients. |
| Industrial PLC I/O Module | Medical Portable Monitor |
Use Scenario: Providing isolated 3.3V/2A power for microcontroller, CAN transceiver, and analog sensor front-end in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Main DC/DC stage converting 24V field bus to regulated logic rail with robust overvoltage/overcurrent protection. Use Value: AEC-Q100 qualification ensures long-term reliability in harsh factory environments; PG flag enables system-level power sequencing. | Use Scenario: Supplying 3.3V/1.5A to ARM-based display controller and touch interface in battery-powered patient monitors. IC Role / Device Role / Timing Role: Primary battery-to-logic converter managing deep-sleep wake-up cycles and clinical-grade low-noise operation. Use Value: 2.5µA IQ extends single-charge runtime to >72 hours; soft-start prevents inrush current tripping battery protection circuits. |
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 |
|---|---|---|---|
| LT8610ABIMSE#PBF | Higher 0.97V feedback voltage; 3.4V min VIN; identical 3.5A/30ns specs | Less suitable for sub-3.4V inputs (e.g., LiFePO₄ battery start-up); same thermal rating | Select when 0.97V reference simplifies existing feedback networks or input never drops below 3.4V |
| LT8640SIMSE#PBF | 42V/5A, 2.5µA IQ, 25ns min on-time, but 3mm × 4mm LQFN vs MSOP | Higher current and faster switching, but requires PCB redesign; no AEC-Q100 grade available | Choose for >3.5A loads or space-constrained layouts where LQFN thermal performance justifies rework |
Compared with LT8610ABIMSE#PBF, the LT8610ACIMSE#PBF enables lower-input-voltage operation and tighter output regulation at low VOUT; versus LT8640SIMSE#PBF, it offers drop-in MSOP compatibility and automotive qualification at the cost of 1.5A lower current rating.
Availability
LT8610ACIMSE#PBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLCs, medical portable monitors, and GSM RF power supplies requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT8610ACIMSE#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, communications, and industrial markets.
The LT8610AC product line delivers ultralow-quiescent-current synchronous buck regulators optimized for automotive and industrial applications demanding high efficiency across wide input ranges and extreme temperature operation.
FAQ
What is the minimum input voltage specification for the LT8610ACIMSE#PBF?
The LT8610ACIMSE#PBF has a guaranteed minimum input voltage of 3.0V, with typical operation down to 2.6V. This enables reliable startup from partially discharged 3.6V LiFePO₄ batteries and operation during automotive cold-crank events where battery voltage dips to ~3.2V. The 3.0V spec is validated across the full –40°C to 125°C temperature range per AEC-Q100 requirements.
How does the LT8610ACIMSE#PBF achieve 2.5µA quiescent current?
The LT8610ACIMSE#PBF achieves 2.5µA quiescent current through Burst Mode operation: internal control circuitry is fully powered down between output pulses, reducing static current. At no load, the device delivers brief current bursts to maintain VOUT, then enters deep sleep drawing only 1.7µA - the remaining 0.8µA accounts for feedback divider current. This behavior is confirmed in Figure G10/G11 of the datasheet under 12V input and 3.3V output conditions.
Is the LT8610ACIMSE#PBF pin-compatible with the LT8610ABIMSE#PBF?
Yes, the LT8610ACIMSE#PBF is pin-compatible with the LT8610ABIMSE#PBF - both use identical 16-lead MSOP packages with matching pinout, thermal pad, and footprint. However, the LT8610ACIMSE#PBF features a lower 0.80V feedback reference and 3.0V minimum input voltage versus 0.97V and 3.4V for the AB variant, requiring feedback resistor recalculations for equivalent output voltages.
What is the purpose of the BIAS pin on the LT8610ACIMSE#PBF?
The BIAS pin on the LT8610ACIMSE#PBF supplies current to the internal 3.4V regulator when tied to a voltage ≥3.1V (e.g., VOUT ≥3.3V), reducing VIN current draw and improving light-load efficiency. When BIAS is unused, the IC draws bias current from VIN. Datasheet Section "OPERATION" confirms BIAS sourcing reduces total input current by up to 9.2mA at 1A load and 2MHz switching, directly enhancing system-level efficiency.
Does the LT8610ACIMSE#PBF include overtemperature protection?
Yes, the LT8610ACIMSE#PBF includes overtemperature protection that disables switching and pulls PG low when junction temperature exceeds safe limits. As stated in Note 3 of the Absolute Maximum Ratings, this protection activates above 150°C and is intended for fault conditions - continuous operation above 125°C degrades lifetime. The thermal shutdown threshold is not specified as a precise trip point but is designed to protect the die during sustained overload or inadequate heatsinking.
LT8610ACIMSE#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:
- 200kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT8610ACIMSE#PBF FAQ
1.How can I place an order for LT8610ACIMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610ACIMSE#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 LT8610ACIMSE#PBF reliable?
The price and inventory of LT8610ACIMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8610ACIMSE#PBF is usually 5 days.
3.What payment methods are accepted for LT8610ACIMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610ACIMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610ACIMSE#PBF?
LT8610ACIMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610ACIMSE#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 LT8610ACIMSE#PBF?
For technical support, including LT8610ACIMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610ACIMSE#PBF requirements.
6.How does Aetrix verify that LT8610ACIMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LT8610ACIMSE#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 LT8610ACIMSE#PBF meets industry standards.
7.What is the process for return or replacement of LT8610ACIMSE#PBF?
All LT8610ACIMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610ACIMSE#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 LT8610ACIMSE#PBF part is unused and in its original packaging.
Return procedure for LT8610ACIMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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