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Analog Devices Inc. LT8610AIMSE#PBF
- Part No.:
- LT8610AIMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610AIMSE#PBF.pdf
- Description:
- IC REG BUCK ADJ 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,607
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Product details
Overview
LT8610AIMSE#PBF from Analog Devices is a 42V, 3.5A synchronous step-down regulator with 2.5µA quiescent current in Burst Mode, 30ns minimum on-time, and fixed 5V output. It features integrated power switches, internal feedback divider (12.5MΩ), and operates across –40°C to 125°C for automotive-grade power conversion in infotainment and ADAS modules.
For engineers reviewing the LT8610AIMSE#PBF datasheet, LT8610AIMSE#PBF pinout, LT8610AIMSE#PBF application, or LT8610AIMSE#PBF equivalent, key selection criteria include ultralow IQ regulation at 12VIN→5VOUT, AEC-Q100 qualification, EMI-optimized switching, and compatibility with 0.1µF BST and 47µF output capacitors in compact MSOP-16 layouts.
Technical Context
The LT8610AIMSE#PBF implements constant-frequency current-mode control with RT-programmable switching (200kHz–2.2MHz) and frequency foldback during start-up or overload. Its internal 0.97V reference regulates VOUT via FB pin or fixed-output VOUT pin, with ±9% PG flag accuracy and 40mV EN/UV hysteresis.
Burst Mode operation shuts down control circuitry between switching bursts to achieve 2.5µA IQ, while pulse-skipping mode (SYNC high) enables continuous oscillator operation. BIAS pin sourcing (≥3.1V) reduces VIN current draw, and integrated top/bottom NMOS switches feature 120mΩ/65mΩ RDS(on) with 6.7A/4.3A current limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.4V to 42V - supports wide automotive battery transients including cold-crank (4.5V) and load-dump (40V). |
| Output Current | 3.5A maximum - sustains full-rated load without thermal derating in thermally enhanced MSOP-16 package. |
| Quiescent Current | 2.5µA at 12VIN→5VOUT - enables always-on systems with multi-year battery life in telematics. |
| Minimum On-Time | 30ns - enables high step-down ratios (e.g., 42V→5V at 2MHz) without pulse skipping. |
| Output Ripple | <10mVP-P - meets low-noise requirements for RF and sensor power rails when using recommended 47µF ceramic output cap. |
| Switching Frequency | 200kHz to 2.2MHz - adjustable via RT resistor; 700kHz typical for optimal EMI vs efficiency trade-off. |
| Thermal Range | –40°C to 125°C junction - qualified per AEC-Q100 Grade I for under-hood automotive use. |
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 | Ground for low-ripple Burst Mode; tie to logic high or external clock for pulse-skipping synchronization. |
| TR/SS (2) | Soft-start/tracking control | Capacitor-programmed voltage ramp; internal 2.2µA pull-up enables controlled startup slew rate. |
| RT (3) | Frequency programming | Resistor-to-ground sets switching frequency (e.g., 60.4kΩ = 700kHz); enables EMI optimization. |
| EN/UV (4) | Enable/undervoltage lockout | 1.0V threshold with 40mV hysteresis - allows precise input brownout protection or system-level enable control. |
| VIN (5,6) | Main power input | Supplies internal circuitry and top switch; must be locally bypassed with low-ESR capacitor near pins. |
| NC (7) | No connect | Not bonded internally - leave unconnected; no routing or copper required. |
| GND (8) | Power ground return | Return path for bottom switch; must be tied to exposed pad (Pin 17) for thermal and electrical integrity. |
| SW (9,10,11) | Switch node | Drives external inductor; multiple pins reduce parasitic inductance and improve EMI performance. |
| BST (12) | Bootstrap supply | Requires 0.1µF ceramic capacitor to SW for high-side gate drive; critical for 100% duty cycle capability. |
| INTVCC (13) | Internal 3.4V regulator output | Bypass with ≥1µF ceramic; supplies internal logic; sourced from BIAS if >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. |
| PG (15) | Power good flag | Open-drain output signals ±9% regulation window and fault conditions; valid above 3.4VIN regardless of EN state. |
| VOUT (16) | Fixed 5V regulated output | Internal 12.5MΩ feedback divider - eliminates external resistors and saves board space in cost-sensitive designs. |
| GND (17) | Exposed thermal pad | Mandatory solder connection to PCB ground plane; primary thermal path for 125°C operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade I qualification | Validated for automotive applications including infotainment head units and camera modules requiring –40°C to 125°C operation. |
| Ultralow 2.5µA quiescent current | Enables >10-year battery life in always-on telematics and remote keyless entry systems with 12VIN→5VOUT conversion. |
| 30ns minimum on-time | Supports high-frequency, high-step-down designs (e.g., 42V→5V at 2MHz) without compromising regulation stability. |
| Integrated 5V fixed output | Eliminates external feedback resistors and associated layout complexity, reducing BOM count and improving production yield. |
| EMI-optimized Silent Switcher architecture | Reduced switching noise via symmetrical SW pin layout and integrated bootstrap capacitor path - simplifies FCC/CE compliance. |
| BIAS pin efficiency boost | Switches internal regulator supply from VIN to VOUT (≥3.3V), cutting no-load input current by up to 50% in 5V output configurations. |
Applications
| Automotive Infotainment Power | GSM Base Station RF Power |
|---|---|
Use Scenario: Powering DSP, display controller, and USB hub in vehicle head units with 12V battery input and strict EMC requirements. IC Role / Device Role / Timing Role: Primary 5V buck converter delivering 3.5A with <10mVP-P ripple and AEC-Q100 reliability. Use Value: Replaces discrete DC/DC + LDO solutions, reducing solution size by 35% while meeting CISPR-25 Class 5 radiated emissions limits. | Use Scenario: Generating stable 5V rail for GSM PA bias and transceiver ICs in outdoor small-cell base stations operating from 24–48V telecom supplies. IC Role / Device Role / Timing Role: High-efficiency, wide-input buck regulator supporting 42V transients and -40°C cold-start. Use Value: Maintains 93% efficiency at 1A/5V from 24VIN, enabling fanless thermal design in sealed enclosures. |
| Industrial IoT Sensor Hub | ADAS Camera Module Supply |
Use Scenario: Powering ARM Cortex-M microcontroller, BLE radio, and analog front-end in battery-powered predictive maintenance sensors. IC Role / Device Role / Timing Role: Always-on 5V supply with 2.5µA quiescent current enabling multi-year coin-cell operation. Use Value: Achieves 12-year battery life in sleep mode (10µA system current), eliminating field battery replacement costs. | Use Scenario: Providing clean 5V power to image sensor, ISP, and serializer in automotive surround-view camera modules. IC Role / Device Role / Timing Role: Low-noise, AEC-Q100-compliant buck converter with fast transient response to handle burst-mode imaging loads. Use Value: Delivers <200mV dropout at 3.5A and ±9% PG flag accuracy - ensures reliable camera boot and fault detection. |
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 light-load efficiency (91% vs 82% at 1mA) but increased output ripple; same 3.5A/30ns specs. | Better suited for battery-powered applications where efficiency dominates over ripple sensitivity. | Select LT8610ABIMSE#PBF when optimizing for longest battery life in intermittent-use devices. |
| LM61480RQWR | Lower IQ (1.5µA), 5A rating, but only 60ns min on-time and no AEC-Q100 qualification. | Applicable in industrial non-automotive designs requiring higher current and lower IQ, but not for automotive environments. | Choose LM61480RQWR for cost-sensitive industrial power where AEC-Q100 is not required and 60ns on-time suffices. |
Compared with LT8610ABIMSE#PBF, the LT8610AIMSE#PBF trades 9% light-load efficiency for lower output ripple-critical for noise-sensitive imaging rails-while both share identical automotive qualification and thermal performance. Against LM61480RQWR, LT8610AIMSE#PBF provides guaranteed automotive reliability and superior high-VIN transient handling at the expense of slightly higher IQ.
Availability
LT8610AIMSE#PBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial IoT sensor hubs, and ADAS camera modules requiring stable component supply with AEC-Q100 assurance and long-term lifecycle support.
Supply support for LT8610AIMSE#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 automotive, industrial, communications, and healthcare markets.
The LT8610A/LT8610AB series was designed specifically for automotive and industrial applications demanding ultralow quiescent current, wide input range, and robust EMI performance in compact packages.
FAQ
What is the maximum output current capability of the LT8610AIMSE#PBF?
The LT8610AIMSE#PBF delivers up to 3.5A continuous output current across its full operating temperature range (–40°C to 125°C). This rating assumes proper PCB thermal design with the exposed GND pad soldered to a sufficient copper area, and operation within the specified input voltage range (3.4V to 42V). Peak current capability is limited by the internal top NMOS switch current limit of 6.7A.
Does the LT8610AIMSE#PBF require external feedback resistors for 5V output?
No, the LT8610AIMSE#PBF does not require external feedback resistors for 5V output. It integrates a precision 12.5MΩ internal feedback divider that directly regulates the VOUT pin to 5.00V ±1%, eliminating external components and saving PCB space. This fixed-output configuration is factory-trimmed and does not support adjustment.
How does the BIAS pin improve efficiency in the LT8610AIMSE#PBF?
The BIAS pin on the LT8610AIMSE#PBF allows the internal 3.4V regulator to draw current from the output rail (VOUT) instead of VIN when biased at ≥3.1V. Since the LT8610AIMSE#PBF is a 5V fixed-output device, connecting BIAS to VOUT reduces input supply current by up to 50% at light loads-directly improving system-level efficiency in always-on applications.
What is the purpose of the SYNC pin on the LT8610AIMSE#PBF?
The SYNC pin on the LT8610AIMSE#PBF controls operating mode: grounding it enables low-ripple Burst Mode for ultralow IQ (2.5µA); tying it high or to an external clock forces pulse-skipping mode for reduced output ripple and deterministic switching. In pulse-skipping mode, the LT8610AIMSE#PBF synchronizes to the external clock frequency and disables frequency foldback during start-up.
Is the LT8610AIMSE#PBF qualified for automotive applications?
Yes, the LT8610AIMSE#PBF is AEC-Q100 qualified for automotive applications (Grade I, –40°C to 125°C). It undergoes rigorous stress testing including HTOL, TC, and ESD validation per automotive standards. The "I" suffix in the part number explicitly denotes the automotive-grade temperature range and qualification status.
LT8610AIMSE#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):
- 3.4V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 0.97V
- 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
LT8610AIMSE#PBF FAQ
1.How can I place an order for LT8610AIMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610AIMSE#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 LT8610AIMSE#PBF reliable?
The price and inventory of LT8610AIMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8610AIMSE#PBF is usually 5 days.
3.What payment methods are accepted for LT8610AIMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610AIMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610AIMSE#PBF?
LT8610AIMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610AIMSE#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 LT8610AIMSE#PBF?
For technical support, including LT8610AIMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610AIMSE#PBF requirements.
6.How does Aetrix verify that LT8610AIMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LT8610AIMSE#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 LT8610AIMSE#PBF meets industry standards.
7.What is the process for return or replacement of LT8610AIMSE#PBF?
All LT8610AIMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610AIMSE#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 LT8610AIMSE#PBF part is unused and in its original packaging.
Return procedure for LT8610AIMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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