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Analog Devices Inc. LT8610ABHMSE-5#TRPBF
- Part No.:
- LT8610ABHMSE-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610ABHMSE-5#TRPBF.pdf
- Description:
- IC REG BUCK 5V 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,568
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Product details
Overview
LT8610ABHMSE-5#TRPBF from Analog Devices is a 42V, 3.5A synchronous step-down regulator with 2.5µA quiescent current in Burst Mode, fixed 5V output, 30ns minimum on-time, and AEC-Q100 qualification for automotive power supplies. It operates across 3.4V–42V input, delivers low-noise regulation for infotainment and ADAS modules, and integrates internal feedback divider (12.5MΩ) for simplified design.
For engineers reviewing the LT8610ABHMSE-5#TRPBF datasheet, LT8610ABHMSE-5#TRPBF pinout, LT8610ABHMSE-5#TRPBF application, or LT8610ABHMSE-5#TRPBF equivalent, key selection criteria include ultralow IQ at light load, 150°C junction-rated MSOP package, ±9% power-good accuracy, and BIAS-pin efficiency optimization for 5V systems.
Technical Context
The LT8610ABHMSE-5#TRPBF uses constant-frequency current-mode control with RT-programmable switching (200kHz–2.2MHz), frequency foldback during start-up/overload, and integrated 0.97V reference with ±0.6% initial accuracy. Its dual NMOS power stage features 120mΩ top-side and 65mΩ bottom-side RDS(on), enabling high efficiency across 0.1mA–3.5A load range.
Burst Mode operation disables internal circuitry between switching bursts to achieve 2.5µA VIN quiescent current at no load; pulse-skipping mode (SYNC = high) increases IQ to ~500µA but eliminates low-frequency ripple. The device supports output soft-start via TR/SS pin and precise enable threshold (1.0V ±40mV) for VIN undervoltage lockout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.4V to 42V - supports wide automotive battery transients including cold-crank (≥3.4V) and load-dump (≤42V). |
| Output Voltage | Fixed 5.00V ±0.6% - internally trimmed; eliminates external resistor divider and reduces BOM count. |
| Max Output Current | 3.5A continuous - enables single-chip 5V/3.5A rail for microcontrollers, sensors, and CAN transceivers. |
| Quiescent Current | 2.5µA at 12VIN/5VOUT - sustains >1-year battery life in always-on automotive modules. |
| Min On-Time | 30ns - allows high step-down ratio (e.g., 42V→5V) at 2MHz without pulse skipping. |
| Thermal Rating | –40°C to +150°C junction - qualified per AEC-Q100 Grade H for under-hood applications. |
| Power-Good Accuracy | ±9% window around 5V - signals valid regulation (4.55V–5.45V) and faults like overcurrent or thermal shutdown. |
Pinout & Package
LT8610ABHMSE-5#TRPBF uses a thermally enhanced 16-lead MSOP package with exposed GND pad (Pin 17), θJA = 40°C/W. Pin 17 must be soldered to PCB for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock input | Ground for Burst Mode (low IQ); tie to INTVCC or logic high for pulse-skipping; accept 200kHz–2.2MHz external clock. |
| TR/SS (2) | Soft-start & tracking control | Capacitor sets VOUT ramp rate; voltage <0.97V forces FB tracking; internal 2.2µA pull-up enables simple soft-start. |
| RT (3) | Frequency programming | Resistor to GND sets fSW: 60.4kΩ → 700kHz; supports EMI reduction via spread-spectrum sync. |
| EN/UV (4) | Enable & input UVLO | 1.0V rising threshold with 40mV hysteresis; enables VIN monitoring or system-level shutdown control. |
| VIN (5,6) | Main power input | High-current path for topside switch and IC bias; requires 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 error amplifier; tie to exposed pad (Pin 17) for lowest impedance path. |
| SW (9,10,11) | Switch node | High dv/dt node connecting to inductor and BST capacitor; minimize trace area to reduce EMI. |
| BST (12) | Bootstrap supply | Drives top NMOS gate; requires 0.1µF ceramic capacitor between BST and SW, placed adjacent to IC. |
| INTVCC (13) | Internal 3.4V regulator | Bypass with ≥1µF ceramic; supplies gate drivers; draws current from BIAS if VBIAS >3.1V, else from VIN. |
| BIAS (14) | Efficiency-boosting supply | Tie to VOUT (5V) to reduce VIN current and improve light-load efficiency; bypass with 1µF if externally sourced. |
| PG (15) | Open-drain power-good | Pulls low when VOUT <4.55V or >5.45V, or during fault; valid only when VIN >3.4V. |
| VOUT (16) | Regulated 5V output | Fixed 5V output pin with internal 12.5MΩ feedback divider; connects directly to load and output capacitors. |
| GND (17) | Exposed thermal pad | Must be soldered to PCB copper pour; primary thermal path and low-inductance GND return for power stage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade H qualification | Validated for –40°C to +150°C operation in automotive under-hood environments with full reliability testing. |
| Ultralow 2.5µA quiescent current | Enables >1-year standby battery life in always-on vehicle modules without compromising regulation stability. |
| 30ns minimum on-time | Supports direct 42V-to-5V conversion at 2MHz, eliminating intermediate stages and reducing solution size. |
| Integrated 5V feedback divider | Removes external resistors, improves accuracy vs. temperature, and reduces component count and layout sensitivity. |
| BIAS pin efficiency optimization | Reduces VIN current draw by sourcing INTVCC from 5V output, improving light-load efficiency by up to 10%. |
| Robust fault protection | Includes overcurrent limiting (6.7A top switch), thermal shutdown, and PG flag for system-level fault detection. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powering SoC, display driver, and audio codec in head-unit with cold-crank resilience and low EMI. IC Role / Device Role / Timing Role: Primary 5V buck converter delivering 3.5A with Burst Mode IQ <3µA to extend parking-mode battery life. Use Value: Eliminates need for external LDO post-regulator; 5V output accuracy (±0.6%) ensures stable DDR memory interface timing. | Use Scenario: Supplying image sensor, ISP, and MIPI transmitter in rear-view camera with vibration-tolerant layout. IC Role / Device Role / Timing Role: High-efficiency 5V source synchronized to system clock via SYNC pin to suppress switching noise in analog video path. Use Value: 30ns min-on-time enables 2MHz operation, moving switching harmonics beyond sensitive 10–100MHz MIPI bands. |
| Industrial Telematics Gateway | Commercial Vehicle Telematics |
Use Scenario: Providing regulated 5V for GPS/GNSS receiver, cellular modem, and CAN controller in fleet management unit. IC Role / Device Role / Timing Role: Input-capable down to 3.4V supports engine-off battery monitoring; EN/UV pin enables controlled wake-up from sleep state. Use Value: ±9% PG accuracy validates 5V rail before modem initialization, preventing firmware crash due to marginal supply. | Use Scenario: Powering ECU diagnostics port, OBD-II interface, and Bluetooth module in heavy-duty truck telematics box. IC Role / Device Role / Timing Role: AEC-Q100 Grade H rating ensures reliable operation at 150°C junction under dash-mounted conditions. Use Value: Exposed GND pad (Pin 17) soldered to 2oz copper reduces thermal resistance to 10°C/W, sustaining 3.5A continuous at 85°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8610AHMSE-5#TRPBF | Same silicon, identical electrical specs, but rated for –40°C to +150°C junction with standard lead-free finish (no #W suffix). | Non-automotive industrial applications requiring same thermal rating but without AEC-Q100 documentation or automotive reliability reports. | Select when AEC-Q100 certification is not required but 150°C operation is critical (e.g., industrial motor drives). |
| LT8610ABIMSE-5#TRPBF | Same functionality and performance, but rated for –40°C to +125°C junction temperature (Grade I) instead of +150°C (Grade H). | Suitable for cabin electronics (e.g., center console, HVAC control) where ambient temperature stays below 105°C. | Choose for cost-sensitive designs where full under-hood thermal margin is unnecessary. |
Compared with LT8610AHMSE-5#TRPBF and LT8610ABIMSE-5#TRPBF, the LT8610ABHMSE-5#TRPBF uniquely combines AEC-Q100 qualification, 150°C junction rating, and automotive-grade traceability-making it the only option certified for safety-critical under-hood deployment.
Availability
LT8610ABHMSE-5#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and industrial telematics requiring stable component supply with long-term lifecycle support.
Supply support for LT8610ABHMSE-5#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 power systems demanding ultralow quiescent current, wide input range, and AEC-Q100 reliability-targeting always-on subsystems with stringent battery-life requirements.
FAQ
What is the maximum junction temperature rating for LT8610ABHMSE-5#TRPBF?
The LT8610ABHMSE-5#TRPBF 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 operating range (–40°C to +150°C), with thermal derating applied above 125°C to ensure long-term reliability in under-hood automotive applications.
Does LT8610ABHMSE-5#TRPBF require an external feedback resistor divider?
No, the LT8610ABHMSE-5#TRPBF does not require an external feedback resistor divider. It is a fixed 5V output variant with an internal 12.5MΩ resistor network connected to the VOUT pin, providing ±0.6% output accuracy and eliminating external components for simplified layout and improved temperature stability.
How does the BIAS pin improve efficiency in LT8610ABHMSE-5#TRPBF?
The BIAS pin on the LT8610ABHMSE-5#TRPBF allows the internal 3.4V regulator (INTVCC) to draw current from the 5V output instead of VIN when VBIAS ≥3.1V. Tying BIAS to VOUT reduces VIN current draw by ~3–5mA at light loads, improving overall efficiency by up to 10% in 5V systems while maintaining regulation integrity.
What is the purpose of the TR/SS pin on LT8610ABHMSE-5#TRPBF?
The TR/SS (Track/Soft-Start) pin on the LT8610ABHMSE-5#TRPBF controls output voltage ramp rate during startup and enables output voltage tracking. A capacitor from TR/SS to GND sets soft-start time; applying an external voltage allows sequencing with other rails. Internal 2.2µA pull-up enables simple, resistor-free soft-start implementation.
Can LT8610ABHMSE-5#TRPBF synchronize to an external clock?
Yes, the LT8610ABHMSE-5#TRPBF can synchronize to an external clock via the SYNC pin (Pin 1). When driven with a logic-level square wave (200kHz–2.2MHz), the device aligns its switching edges to the external clock, enabling EMI reduction through frequency coordination and elimination of beat frequencies in multi-rail systems.
LT8610ABHMSE-5#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):
- 5V
- Voltage - Output (Max):
- -
- 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-5#TRPBF FAQ
1.How can I place an order for LT8610ABHMSE-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610ABHMSE-5#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-5#TRPBF reliable?
The price and inventory of LT8610ABHMSE-5#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-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610ABHMSE-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610ABHMSE-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610ABHMSE-5#TRPBF?
LT8610ABHMSE-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610ABHMSE-5#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-5#TRPBF?
For technical support, including LT8610ABHMSE-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610ABHMSE-5#TRPBF requirements.
6.How does Aetrix verify that LT8610ABHMSE-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610ABHMSE-5#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-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610ABHMSE-5#TRPBF?
All LT8610ABHMSE-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610ABHMSE-5#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-5#TRPBF part is unused and in its original packaging.
Return procedure for LT8610ABHMSE-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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