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Analog Devices Inc. LT8610AHMSE-5#PBF
- Part No.:
- LT8610AHMSE-5#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610AHMSE-5#PBF.pdf
- Description:
- IC REG BUCK 5V 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,276
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Product details
Overview
LT8610AHMSE-5#PBF from Analog Devices is a 42V, 3.5A synchronous step-down regulator with 2.5µA quiescent current, 30ns minimum on-time, fixed 5V output, and AEC-Q100 qualification for automotive applications. It operates across 3.4V–42V input, delivers low-noise regulation in Burst Mode, and integrates internal feedback divider (12.5MΩ) for simplified design in infotainment power supplies.
For engineers reviewing the LT8610AHMSE-5#PBF datasheet, LT8610AHMSE-5#PBF pinout, LT8610AHMSE-5#PBF application, or LT8610AHMSE-5#PBF equivalent, key selection criteria include its –40°C to 150°C junction temperature rating, 5V ±0.6% output accuracy at 0.5A, 95% peak efficiency at 1A/12VIN→5VOUT, and compatibility with external synchronization up to 2.2MHz.
Technical Context
The LT8610AHMSE-5#PBF implements constant-frequency current-mode control with adjustable switching frequency (200kHz–2.2MHz via RT resistor), internal 0.97V reference, and integrated top/bottom NMOS power switches (120mΩ/65mΩ). Its Burst Mode operation enables ultralow IQ regulation by disabling internal circuitry between energy bursts.
It features programmable soft-start via TR/SS pin, ±9% power-good monitoring referenced to FB/VOUT, EN/UV pin with 1.0V accurate threshold and 40mV hysteresis, and BIAS pin support for improved light-load efficiency when tied to ≥3.1V supply - all within a thermally enhanced 16-lead MSOP package with exposed GND pad.
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 5.00V ±0.6% at 0.5A - internally trimmed; eliminates external feedback resistors and reduces BOM count. |
| Max Output Current | 3.5A continuous - enables single-chip 5V/3.5A rail for ADAS camera modules or domain controllers. |
| Quiescent Current | 2.5µA typical in Burst Mode - sustains always-on functionality in vehicle body electronics without battery drain. |
| Min On-Time | 30ns - allows high VIN-to-VOUT conversion ratios (e.g., 42V→5V) at high frequencies without pulse skipping. |
| Thermal Rating | Junction temp: –40°C to +150°C - qualified per AEC-Q100 Grade H for under-hood automotive use. |
| EMI Performance | Integrated spread-spectrum and fast min-on-time reduce peak EMI - simplifies compliance with CISPR 25 Class 5. |
Pinout & Package
LT8610AHMSE-5#PBF uses a 16-lead plastic MSOP package with exposed thermal pad (Pin 17 = GND), θJA = 40°C/W, θJC(PAD) = 10°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 source (0–2.2MHz); tie low for low-ripple Burst Mode operation. |
| TR/SS (2) | Soft-start & tracking control | Capacitor-programmable VOUT ramp rate; internal 2.2µA pull-up enables simple soft-start timing. |
| RT (3) | Frequency set resistor | Resistor to GND sets fSW from 200kHz to 2.2MHz; determines inductor size and EMI profile. |
| EN/UV (4) | Enable & undervoltage lockout | 1.0V rising-edge threshold with 40mV hysteresis - enables precise input brownout protection. |
| VIN (5,6) | Main power input | Dual pins reduce IR drop and improve thermal path; require local 1µF ceramic bypass near pins. |
| NC (7) | No connect | Not bonded; leave unconnected and unrouted. |
| GND (8) | Signal ground | Return for bottom switch and control logic; must be tied to exposed pad (Pin 17). |
| SW (9,10,11) | Switch node | High-current connection to inductor and BST capacitor; requires minimal PCB copper area for EMI control. |
| BST (12) | Bootstrap supply | Drives top NMOS gate; requires 0.1µF ceramic capacitor placed adjacent to IC. |
| INTVCC (13) | Internal 3.4V regulator output | Bypass with ≥1µF ceramic; powers internal logic; sourced from BIAS if >3.1V, else from VIN. |
| BIAS (14) | Efficiency-boost bias supply | Tie to VOUT (5V) to reduce VIN current draw and improve light-load efficiency. |
| PG (15) | Power-good flag | Open-drain output asserts high when VOUT is within ±9% of 5V and no fault exists. |
| VOUT (16) | Regulated 5V output | Fixed-output pin with internal 12.5MΩ divider - no external resistors needed. |
| GND (17) | Exposed thermal pad | Must be soldered to PCB plane for thermal dissipation and low-impedance GND return. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade H qualification | Validated for automotive under-hood operation up to 150°C junction temperature. |
| Ultralow 2.5µA quiescent current | Extends battery life in always-on systems such as telematics and gateway ECUs. |
| 30ns minimum on-time | Enables direct 42V-to-5V conversion at 2MHz without duty-cycle limitation. |
| Integrated 5V feedback divider (12.5MΩ) | Eliminates external resistors, reduces layout sensitivity, and improves long-term output stability. |
| Programmable soft-start via TR/SS | Prevents inrush current during startup using a single external capacitor. |
| BIAS pin efficiency optimization | Reduces input current draw by sourcing INTVCC from VOUT instead of VIN above 3.1V. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powering SoC, display interface, and audio codecs in head-unit systems requiring stable 5V at up to 3A. IC Role / Device Role / Timing Role: Primary 5V buck converter delivering regulated rail with low noise and fast transient response. Use Value: 2.5µA IQ enables always-on CAN wake-up capability; AEC-Q100 H-grade ensures reliability over full vehicle lifetime. | Use Scenario: Providing clean 5V power to image sensors and ISP processors in surround-view or front-facing cameras. IC Role / Device Role / Timing Role: High-efficiency DC/DC regulator with tight output tolerance (±0.6%) and low ripple (<10mVP-P). Use Value: 30ns min-on-time supports compact 2.1MHz design; integrated PG flag enables safe sensor initialization sequence. |
| Industrial Control Gateway | Electric Vehicle Battery Management Interface |
Use Scenario: Generating 5V for ARM-based PLC controllers operating in harsh factory environments with wide input voltage swings. IC Role / Device Role / Timing Role: Robust step-down regulator handling 12–42V industrial bus inputs while maintaining regulation during line dips. Use Value: 42V max input withstands motor drive back-EMF; –40°C to +150°C rating ensures operation in sealed enclosures. | Use Scenario: Powering isolated communication interfaces (e.g., CAN FD transceivers) in BMS slave boards located near high-voltage battery packs. IC Role / Device Role / Timing Role: Safety-critical 5V supply with power-good signaling and thermal shutdown protection. Use Value: PG flag synchronizes firmware boot with stable VOUT; exposed pad enhances thermal margin in confined battery pack spaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8610ABHMSE-5#PBF | Same package and pinout; higher light-load efficiency (91% vs 82% at 1mA) but increased output ripple in Burst Mode. | Preferred where lowest standby power dominates over ripple sensitivity (e.g., remote keyless entry receivers). | Select LT8610ABHMSE-5#PBF only if system-level filtering accommodates higher ripple; otherwise retain LT8610AHMSE-5#PBF for lower noise. |
| LM61480RQWR | 42V, 8A, 1.5µA IQ, 3.5ns min-on-time; QFN-16, not pin-compatible; requires different layout and compensation. | Targets higher-current applications (>3.5A) or designs needing faster transient response and lower EMI. | Choose LM61480RQWR when scaling power beyond 3.5A or requiring TI's WEBENCH integration; not a drop-in replacement. |
Compared with LT8610ABHMSE-5#PBF, the LT8610AHMSE-5#PBF offers lower output ripple and proven noise performance in automotive infotainment, while LM61480RQWR provides higher current capacity and newer architecture but demands full redesign - making LT8610AHMSE-5#PBF optimal for cost-sensitive, AEC-Q100-compliant 5V/3.5A applications.
Availability
LT8610AHMSE-5#PBF is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and industrial control gateways requiring stable component supply with extended temperature support and AEC-Q100 traceability.
Supply support for LT8610AHMSE-5#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 AEC-Q100 reliability - with the LT8610AHMSE-5#PBF targeting high-temperature 5V power rails.
FAQ
What is the maximum junction temperature rating for the LT8610AHMSE-5#PBF?
The LT8610AHMSE-5#PBF is rated for a maximum junction temperature of +150°C and is qualified per AEC-Q100 Grade H. This rating is validated across the full –40°C to +150°C operating junction temperature range, enabling deployment in under-hood automotive locations where ambient temperatures exceed 105°C. Derating curves in the datasheet define safe operating area limits above 125°C.
Does the LT8610AHMSE-5#PBF require external feedback resistors for 5V output?
No, the LT8610AHMSE-5#PBF does not require external feedback resistors. It integrates a precision 12.5MΩ internal feedback divider that regulates the VOUT pin to 5.00V ±0.6% at 0.5A. This eliminates external resistor networks, reduces component count, improves long-term output stability, and removes layout sensitivity associated with high-impedance feedback traces - all confirmed in the Electrical Characteristics table on page 3 of the Rev. C datasheet.
How does the BIAS pin improve efficiency in the LT8610AHMSE-5#PBF?
The BIAS pin on the LT8610AHMSE-5#PBF sources current for the internal 3.4V regulator (INTVCC) when biased ≥3.1V - typically by connecting directly to the 5V VOUT pin. This reduces VIN current draw, especially at light loads, improving overall efficiency. At 1mA load and 12VIN→5VOUT, BIAS operation lowers input current by ~20% versus VIN-only sourcing, as verified in the "VIN Current in Regulation" table on page 3 of the datasheet.
Can the LT8610AHMSE-5#PBF synchronize to an external clock?
Yes, the LT8610AHMSE-5#PBF supports external clock synchronization via the SYNC pin (Pin 1). When driven with a logic-level square wave (0–6V), it locks its internal oscillator to the external frequency from 200kHz to 2.2MHz. Synchronization eliminates beat frequencies in multi-rail systems and aids EMI compliance. The SYNC pin must not be left floating; tie to GND for Burst Mode or to a clock source for synchronized operation.
What is the purpose of the exposed thermal pad (Pin 17) on the LT8610AHMSE-5#PBF?
The exposed thermal pad (Pin 17) on the LT8610AHMSE-5#PBF is electrically and thermally connected to GND and must be soldered to a PCB copper plane. It provides θJC(PAD) = 10°C/W thermal resistance, significantly lowering junction-to-board temperature rise. Per the datasheet's MSE Package drawing (page 2), failure to solder this pad degrades thermal performance and may cause premature thermal shutdown or reduced lifetime - especially critical in automotive applications operating at 150°C junction temperature.
LT8610AHMSE-5#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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.4V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 3.5A
- Frequency - Switching:
- 200kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT8610AHMSE-5#PBF FAQ
1.How can I place an order for LT8610AHMSE-5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610AHMSE-5#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 LT8610AHMSE-5#PBF reliable?
The price and inventory of LT8610AHMSE-5#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8610AHMSE-5#PBF is usually 5 days.
3.What payment methods are accepted for LT8610AHMSE-5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610AHMSE-5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610AHMSE-5#PBF?
LT8610AHMSE-5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610AHMSE-5#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 LT8610AHMSE-5#PBF?
For technical support, including LT8610AHMSE-5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610AHMSE-5#PBF requirements.
6.How does Aetrix verify that LT8610AHMSE-5#PBF is sourced from the original manufacturer or authorized distributors?
All LT8610AHMSE-5#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 LT8610AHMSE-5#PBF meets industry standards.
7.What is the process for return or replacement of LT8610AHMSE-5#PBF?
All LT8610AHMSE-5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610AHMSE-5#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 LT8610AHMSE-5#PBF part is unused and in its original packaging.
Return procedure for LT8610AHMSE-5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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