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Analog Devices Inc. LT8610ABIMSE-3.3#TRPBF
- Part No.:
- LT8610ABIMSE-3.3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610ABIMSE-3.3#TRPBF.pdf
- Description:
- IC REG BUCK 3.3V 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,978
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Product details
Overview
LT8610ABIMSE-3.3#TRPBF from Analog Devices is a 42V, 3.5A synchronous step-down regulator with 2.5µA quiescent current, 30ns minimum on-time, fixed 3.3V output, and AEC-Q100 qualification for automotive power supplies. It operates across 3.4V–42V input, delivers <10mVP-P ripple at 3.3V/1A, and integrates soft-start, power-good flag, and external synchronization.
For engineers reviewing the LT8610ABIMSE-3.3#TRPBF datasheet, LT8610ABIMSE-3.3#TRPBF pinout, LT8610ABIMSE-3.3#TRPBF application, or LT8610ABIMSE-3.3#TRPBF equivalent, key selection criteria include ultralow IQ in burst mode, 3.3V fixed-output accuracy (±0.6%), thermal performance in MSOP-16EP, and compatibility with BIAS pin optimization for high-efficiency automotive subsystems.
Technical Context
The LT8610ABIMSE-3.3#TRPBF uses constant-frequency current-mode control with an internal 0.97V reference and programmable oscillator (200kHz–2.2MHz via RT pin). Its dual-MOSFET synchronous architecture features 120mΩ top-side and 65mΩ bottom-side NMOS switches, enabling >93% efficiency at 1A/3.3V from 12VIN.
Burst Mode® operation reduces quiescent current to 2.5µA under no-load regulation, while the EN/UV pin provides accurate 1.0V threshold undervoltage lockout. The PG pin signals ±9% VOUT tolerance and fault conditions, and the TR/SS pin supports output tracking and soft-start via external capacitor.
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 (≤42V). |
| Output Voltage | Fixed 3.3V ±0.6% - internally trimmed resistor divider eliminates external feedback components and minimizes no-load current. |
| Max Output Current | 3.5A continuous - enables single-chip power for infotainment SoCs, ADAS sensors, and gateway ECUs. |
| Quiescent Current | 2.5µA in Burst Mode - sustains always-on functionality in vehicle body electronics without draining battery. |
| Min On-Time | 30ns - allows high step-down ratios (e.g., 42V→3.3V) at 2MHz switching frequency without pulse-skipping instability. |
| Thermal Rating | –40°C to +125°C junction - qualified per AEC-Q100 Grade I, suitable for under-hood and cabin-mounted modules. |
| EMI Performance | Integrated spread-spectrum and fast switching edges - meets CISPR 25 Class 5 radiated emissions with standard layout. |
Pinout & Package
LT8610ABIMSE-3.3#TRPBF is housed in a thermally enhanced 16-lead MSOP package with exposed 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 input | Enables synchronization to external clock or forces pulse-skipping mode when tied high; grounded for low-ripple Burst Mode. |
| TR/SS (2) | Soft-start & tracking control | Capacitor-programmed voltage ramp rate during startup; also enables output voltage tracking of another rail. |
| RT (3) | Frequency programming | Resistor-to-ground sets switching frequency from 200kHz to 2.2MHz - critical for EMI tuning and inductor size optimization. |
| EN/UV (4) | Enable & input UVLO | 1.0V rising-edge threshold enables shutdown below battery brownout; hysteresis prevents chatter during transients. |
| VIN (5,6) | Main input supply | High-current path for IC bias and top switch - requires local 1µF ceramic bypass close to pins. |
| NC (7) | No connect | Not bonded internally - must remain unconnected on PCB. |
| GND (8) | Power ground return | Return path for bottom switch and control circuitry - ties to exposed pad (Pin 17) for lowest thermal resistance. |
| VOUT (16) | Regulated output | Fixed 3.3V output node with integrated 14.3MΩ feedback divider - no external resistors required. |
| PG (15) | Power-good flag | Open-drain output asserts high when VOUT is within ±9% of 3.3V and no faults exist - used for system sequencing. |
| BIAS (14) | Internal regulator supply | When tied to VOUT, reduces VIN current draw and improves light-load efficiency - mandatory for 3.3V output configuration. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade I qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensor power rails. |
| Ultralow 2.5µA quiescent current | Extends battery life in always-on systems such as telematics and remote keyless entry receivers. |
| 30ns minimum on-time | Enables direct 42V-to-3.3V conversion at 2MHz, reducing solution size vs. multi-stage designs. |
| Integrated 14.3MΩ feedback network | Eliminates external resistors, cuts BOM cost, and removes parasitic leakage paths that degrade no-load IQ. |
| BIAS pin support | Reduces total input current by sourcing INTVCC from VOUT, improving efficiency above 10mA load. |
| Robust fault protection | Includes overtemperature shutdown, cycle-by-cycle current limiting, and PG-based output monitoring. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powering SoC, display interface, and audio codec in head-unit systems requiring always-on wake-up capability. IC Role / Device Role / Timing Role: Primary 3.3V buck converter delivering regulated power with <10mVP-P ripple and 2.5µA IQ. Use Value: Enables low-power sleep modes without compromising boot speed or signal integrity in HDMI/MIPI interfaces. | Use Scenario: Supplying image sensor, ISP, and serializer in rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: Fixed 3.3V source with fast transient response (<50µs recovery from 1.5A→3.5A step) and AEC-Q100 reliability. Use Value: Maintains clean power during motion-triggered capture bursts, preventing image artifacts or frame drops. |
| Body Control Module (BCM) | Telematics Control Unit (TCU) |
Use Scenario: Powering microcontroller, CAN transceiver, and LIN interface in door module or lighting controller. IC Role / Device Role / Timing Role: High-efficiency 3.3V regulator supporting 12V battery input with cold-crank tolerance down to 3.4V. Use Value: Ensures uninterrupted operation during engine start (≥4.5V) and maintains MCU watchdog timing during deep-sleep states. | Use Scenario: Providing stable 3.3V rail for cellular modem, GNSS receiver, and secure element in connected vehicle platforms. IC Role / Device Role / Timing Role: Low-noise, low-IQ supply with PG flag for safe firmware update sequencing and reset coordination. Use Value: Guarantees reliable OTA updates by asserting PG only after full regulation, avoiding premature modem initialization. |
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 |
|---|---|---|---|
| LT8610AIMSE-3.3#TRPBF | Same pinout and feature set but LT8610A variant with 82% light-load efficiency (vs. 91% for LT8610AB) and higher output ripple in Burst Mode. | Preferred where lower cost and legacy design reuse outweigh efficiency gains; not recommended for battery-sensitive telematics. | Select LT8610AIMSE-3.3#TRPBF only if existing layout validation exists and 91% light-load efficiency is not required. |
| TPS543320RHLT | 3.5A, 3.3V fixed-output buck with 1.5µA IQ but no AEC-Q100 qualification; uses different pinout and lacks TR/SS tracking capability. | Suitable for industrial or consumer applications with identical electrical specs but no automotive reliability requirements. | Choose TPS543320RHLT only for non-automotive designs where AEC-Q100 is unnecessary and PCB redesign is acceptable. |
Compared with LT8610AIMSE-3.3#TRPBF, the LT8610ABIMSE-3.3#TRPBF delivers 9% higher light-load efficiency and lower output ripple with larger output capacitance, while TPS543320RHLT offers lower IQ but requires layout changes and lacks automotive qualification - making LT8610ABIMSE-3.3#TRPBF optimal for new AEC-Q100-compliant designs demanding best-in-class efficiency.
Availability
LT8610ABIMSE-3.3#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control units requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for LT8610ABIMSE-3.3#TRPBF 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 power systems requiring ultralow quiescent current, wide input range, and robust transient performance in space-constrained environments.
FAQ
What is the guaranteed output voltage accuracy of the LT8610ABIMSE-3.3#TRPBF over temperature and line?
The LT8610ABIMSE-3.3#TRPBF guarantees 3.3V output within ±0.6% over –40°C to +125°C junction temperature and 3.4V–42V input range, based on internal 14.3MΩ feedback divider trimming and 0.97V reference stability. This accuracy eliminates need for external calibration in automotive applications.
Can the LT8610ABIMSE-3.3#TRPBF operate without connecting the BIAS pin?
Yes, the LT8610ABIMSE-3.3#TRPBF can operate with BIAS pin unconnected, but it will draw bias current from VIN instead of VOUT, increasing light-load input current by ~1–2mA and reducing efficiency. For optimal performance at 3.3V output, BIAS must be tied directly to VOUT.
How does the LT8610ABIMSE-3.3#TRPBF differ from the LT8610A in Burst Mode operation?
The LT8610ABIMSE-3.3#TRPBF uses a 1A Burst Mode current limit versus 400mA in the LT8610A, yielding 91% efficiency at 1mA load (vs. 82%) but with higher output ripple. Ripple is reduced proportionally by increasing output capacitance - e.g., 47µF ×2 lowers peak-to-peak ripple to <10mV.
Is the LT8610ABIMSE-3.3#TRPBF pin-compatible with earlier LT8610 variants?
Yes, the LT8610ABIMSE-3.3#TRPBF shares identical MSOP-16EP package, pinout, and footprint with LT8610A/LT8610 versions. No PCB changes are required when upgrading from LT8610AIMSE-3.3#TRPBF, though BIAS connection and output capacitor may be optimized for AB-series efficiency gains.
What thermal derating applies to the LT8610ABIMSE-3.3#TRPBF at 125°C ambient?
At 125°C ambient with standard 2-layer PCB and exposed pad soldered, the LT8610ABIMSE-3.3#TRPBF junction temperature reaches ~145°C at 3.5A - within its 150°C absolute max rating. Derating to 2.8A is recommended for continuous operation at 125°C ambient to ensure 20-year lifetime per Analog Devices reliability models.
LT8610ABIMSE-3.3#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.4V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- 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
LT8610ABIMSE-3.3#TRPBF FAQ
1.How can I place an order for LT8610ABIMSE-3.3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610ABIMSE-3.3#TRPBF 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 LT8610ABIMSE-3.3#TRPBF reliable?
The price and inventory of LT8610ABIMSE-3.3#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8610ABIMSE-3.3#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610ABIMSE-3.3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610ABIMSE-3.3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610ABIMSE-3.3#TRPBF?
LT8610ABIMSE-3.3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610ABIMSE-3.3#TRPBF 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 LT8610ABIMSE-3.3#TRPBF?
For technical support, including LT8610ABIMSE-3.3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610ABIMSE-3.3#TRPBF requirements.
6.How does Aetrix verify that LT8610ABIMSE-3.3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610ABIMSE-3.3#TRPBF 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 LT8610ABIMSE-3.3#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610ABIMSE-3.3#TRPBF?
All LT8610ABIMSE-3.3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610ABIMSE-3.3#TRPBF, 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 LT8610ABIMSE-3.3#TRPBF part is unused and in its original packaging.
Return procedure for LT8610ABIMSE-3.3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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