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Analog Devices Inc. LT8610ABHMSE#TRPBF
- Part No.:
- LT8610ABHMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610ABHMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,003
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Product details
Overview
LT8610ABHMSE#TRPBF 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 AEC-Q100 qualification for automotive applications. It delivers fixed 5V output in thermally enhanced 16-lead MSOP package and supports synchronization, soft-start, and power-good signaling.
For engineers reviewing the LT8610ABHMSE#TRPBF datasheet, LT8610ABHMSE#TRPBF pinout, LT8610ABHMSE#TRPBF application, or LT8610ABHMSE#TRPBF equivalent, key selection criteria include ultralow IQ at light load, high efficiency across 1mA–3.5A range, EMI-optimized switching, and operation up to 150°C junction temperature.
Technical Context
The LT8610ABHMSE#TRPBF employs constant-frequency current-mode control with adjustable 200kHz–2.2MHz switching via RT resistor. Its internal 0.97V reference regulates FB or fixed VOUT (5V) with ±1% output accuracy over line, load, and temperature.
Burst Mode operation enables 2.5µA input current at no load while maintaining regulation; pulse-skipping mode activates when SYNC is pulled high. The device integrates top/bottom NMOS switches (120mΩ/65mΩ), supports BIAS pin sourcing for improved efficiency, and features frequency foldback during startup or overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.4V to 42V - supports wide automotive battery transients and industrial 24/36V rails. |
| Output Current | 3.5A continuous - sufficient for powering microcontrollers, sensors, and communication ICs in harsh environments. |
| Quiescent Current | 2.5µA at 12VIN→5VOUT - enables always-on systems with multi-year battery life. |
| Minimum On-Time | 30ns - allows high step-down ratios (e.g., 42V→5V) at 2MHz without pulse skipping. |
| Efficiency @1A | 95% at 12VIN→5VOUT - reduces thermal stress and eliminates need for heatsinking in compact layouts. |
| Operating Junction Temp | –40°C to +150°C - qualified for under-hood automotive and industrial high-temp deployments. |
| Feedback Reference | 0.970V ±0.006V - enables precise output regulation and stable loop compensation. |
Pinout & Package
Package: 16-lead plastic MSOP with exposed thermal pad (Pin 17 = GND). θJA = 40°C/W, θJC(PAD) = 10°C/W. Exposed pad must be soldered to PCB for thermal and electrical performance.
| 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 | Programs output ramp rate via capacitor; enables voltage tracking of another rail during startup. |
| RT (3) | Frequency programming | Resistor to GND sets switching frequency from 200kHz to 2.2MHz for EMI optimization. |
| EN/UV (4) | Enable & undervoltage lockout | 1.0V threshold with 40mV hysteresis - provides precise VIN monitoring and controlled shutdown. |
| VIN (5,6) | Main power input | Supplies internal circuitry and top switch; requires local 1µF ceramic bypass near pins. |
| NC (7) | No connect | Not internally bonded - must remain unconnected. |
| GND (8) | Power ground return | Return path for bottom switch; must be tied to exposed pad (Pin 17) for thermal and noise integrity. |
| VOUT (16) | Fixed 5V regulated output | Internal 12.5MΩ feedback divider - eliminates external resistors and minimizes no-load current. |
| PG (15) | Power-good flag | Open-drain output signals VOUT within ±9% of target and absence of fault conditions. |
| BIAS (14) | Internal regulator supply | When tied to VOUT ≥3.3V, reduces VIN current draw and improves light-load efficiency. |
| INTVCC (13) | Internal 3.4V regulator output | Bypass with ≥1µF ceramic capacitor; powers gate drivers and control logic. |
| BST (12) | Bootstrap supply | Requires 0.1µF ceramic capacitor to SW for high-side NMOS gate drive. |
| SW (9,10,11) | Switch node | Connects to inductor and BST capacitor; must be minimized in layout to reduce EMI. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Rated for automotive applications with guaranteed operation from –40°C to +150°C junction temperature. |
| Ultralow Quiescent Current | 2.5µA IQ in Burst Mode enables >10-year battery life in always-on telematics and sensor nodes. |
| EMI-Optimized Switching | Fast 30ns min on-time, integrated spread spectrum (via SYNC), and silent switcher architecture reduce radiated emissions. |
| Robust Protection Suite | Includes overcurrent limiting (6.7A top switch), thermal shutdown, INTVCC UVLO, and VIN UVLO with hysteresis. |
| Fixed 5V Output Option | Eliminates external feedback resistors, reduces BOM count, and ensures ±1% output accuracy over full temperature range. |
Applications
| Automotive Infotainment Power | GSM/Baseband RF Power Supply |
|---|---|
Use Scenario: Powering SoC, display controller, and audio codec in head unit with cold-crank (4.5V) and load-dump (42V) immunity. IC Role / Device Role / Timing Role: Primary 5V buck converter delivering clean, regulated power with fast transient response to dynamic CPU loads. Use Value: 2.5µA IQ extends backup battery life; 150°C rating ensures reliability in sealed enclosures; PG flag enables safe system boot sequencing. | Use Scenario: Supplying 5V to GSM transceiver modules requiring low-noise, high-efficiency conversion from 12V vehicle bus. IC Role / Device Role / Timing Role: High-efficiency DC/DC stage minimizing heat in space-constrained cellular modem designs. Use Value: 95% efficiency at 1A reduces thermal footprint; 30ns min on-time maintains regulation during high-frequency burst transmission. |
| Industrial PLC I/O Module | Automotive ADAS Camera Power |
Use Scenario: Providing isolated 5V rail for digital I/O and communication interfaces in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Main 5V supply with robust input transient handling and long-term reliability under continuous 60°C ambient. Use Value: 42V max input withstands industrial surge events; AEC-Q100 qualification ensures field longevity; SYNC pin enables EMI filtering via frequency dithering. | Use Scenario: Powering image sensor and ISP in rear-view or surround-view camera with extended temperature requirements. IC Role / Device Role / Timing Role: Compact, high-reliability 5V source operating continuously in engine bay or bumper locations. Use Value: 150°C junction rating supports placement near heat sources; fixed 5V output simplifies design and improves accuracy vs. resistor-based solutions. |
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 |
|---|---|---|---|
| LT8610AHMSE#TRPBF | Same package and temp grade, but LT8610A variant - lower light-load efficiency (82% vs 91% at 1mA), higher output ripple in Burst Mode. | Lacks LT8610AB's optimized Burst Mode; suitable where lowest IQ is less critical than minimal ripple. | Select LT8610AHMSE#TRPBF only if design prioritizes tighter output ripple over ultralow IQ and peak efficiency. |
| LT8640SHE#TRPBF | Higher 6A output, 40V max input, 2.5µA IQ, but 20-lead LQFN package and no AEC-Q100 rating. | Offers higher current and smaller solution size, but lacks automotive qualification and uses different footprint. | Choose LT8640SHE#TRPBF for non-automotive 5V/6A applications needing smaller board area and higher current headroom. |
Compared with LT8610AHMSE#TRPBF, the LT8610ABHMSE#TRPBF delivers 9% higher efficiency at 1mA load and lower output ripple sensitivity, while LT8640SHE#TRPBF trades automotive qualification for higher current and smaller package - making LT8610ABHMSE#TRPBF optimal for AEC-Q100-compliant 3.5A 5V systems.
Availability
LT8610ABHMSE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC power, GSM baseband supplies, and ADAS camera modules requiring stable component supply across extended temperature ranges.
Supply support for LT8610ABHMSE#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 and industrial applications demanding ultralow quiescent current, wide input range, and high reliability under extreme temperature and voltage stress.
FAQ
What is the maximum junction temperature rating for LT8610ABHMSE#TRPBF?
The LT8610ABHMSE#TRPBF is rated for operation from –40°C to +150°C junction temperature and is AEC-Q100 qualified for automotive use. This rating is confirmed in the Absolute Maximum Ratings table and applies to all LT8610ABHMSE variants. Thermal derating above 125°C is required per Analog Devices' lifetime guidelines, and the exposed pad (Pin 17) must be soldered to ensure θJC(PAD) = 10°C/W performance.
Does LT8610ABHMSE#TRPBF support fixed 5V output without external feedback resistors?
Yes, the LT8610ABHMSE#TRPBF is the fixed 5V version of the LT8610AB series and contains an internal 12.5MΩ feedback divider connected to Pin 16 (VOUT). No external resistors are needed - this configuration minimizes no-load current and ensures ±1% output accuracy over temperature and line, directly supporting simplified, high-reliability designs.
How does the Burst Mode efficiency of LT8610ABHMSE#TRPBF compare to LT8610A?
The LT8610ABHMSE#TRPBF achieves 91% efficiency at 1mA load (VIN=12V, VOUT=3.3V), versus 82% for the LT8610A - a 9% absolute improvement enabled by higher Burst Mode current limit (1A vs 400mA). This comes with proportionally higher output ripple, mitigated by increasing output capacitance, as documented in the datasheet's Table 1 and Figure 2b.
Can LT8610ABHMSE#TRPBF be synchronized to an external clock?
Yes, the LT8610ABHMSE#TRPBF supports external synchronization via the SYNC pin (Pin 1). Applying a logic-level clock signal (0.8V–2.4V thresholds) synchronizes switching to the external frequency and forces pulse-skipping mode. This capability enables EMI reduction through frequency dithering or alignment with system clocks - critical in automotive and industrial timing-sensitive systems.
What is the role of the BIAS pin on LT8610ABHMSE#TRPBF, and how should it be connected?
The BIAS pin (Pin 14) supplies current to the internal 3.4V regulator. When tied to VOUT (≥3.3V), it reduces VIN current draw and improves light-load efficiency. For the LT8610ABHMSE#TRPBF (fixed 5V), BIAS must be connected directly to VOUT. A 1µF ceramic bypass capacitor is recommended if BIAS connects to any supply other than VOUT.
LT8610ABHMSE#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:
- 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 ~ 2.24MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT8610ABHMSE#TRPBF FAQ
1.How can I place an order for LT8610ABHMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610ABHMSE#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 LT8610ABHMSE#TRPBF reliable?
The price and inventory of LT8610ABHMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8610ABHMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610ABHMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610ABHMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610ABHMSE#TRPBF?
LT8610ABHMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610ABHMSE#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 LT8610ABHMSE#TRPBF?
For technical support, including LT8610ABHMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610ABHMSE#TRPBF requirements.
6.How does Aetrix verify that LT8610ABHMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610ABHMSE#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 LT8610ABHMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610ABHMSE#TRPBF?
All LT8610ABHMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610ABHMSE#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 LT8610ABHMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT8610ABHMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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