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Analog Devices Inc. LT8610ACHMSE#TRPBF
- Part No.:
- LT8610ACHMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610ACHMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,734
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Product details
Overview
LT8610ACHMSE#TRPBF from Analog Devices is a 42V, 3.5A synchronous step-down regulator with 2.5µA quiescent current in Burst Mode, 0.80V feedback reference, 30ns minimum on-time, and AEC-Q100 qualification for automotive applications. It operates from 3V to 42V input, delivers regulated output down to 0.8V, and integrates internal power MOSFETs in a thermally enhanced 16-lead MSOP package with exposed pad.
For engineers reviewing the LT8610ACHMSE#TRPBF datasheet, LT8610ACHMSE#TRPBF pinout, LT8610ACHMSE#TRPBF application, or LT8610ACHMSE#TRPBF equivalent, key selection criteria include ultralow IQ for battery-powered systems, high-frequency synchronization capability (up to 2.2MHz), dropout performance (200mV @ 1A), EMI-optimized switching, and automotive-grade thermal reliability up to 150°C junction temperature.
Technical Context
The LT8610ACHMSE#TRPBF employs constant-frequency current-mode control with internal top/bottom NMOS switches, 0.80V precision reference, and programmable oscillator via RT pin. Its architecture supports both Burst Mode (for <2.5µA IQ) and pulse-skipping modes, with frequency foldback during startup or overload to limit inductor current.
It features dual supply paths-INTVCC powered from VIN or BIAS (when >3.1V)-enabling high-efficiency operation at 3.3V+ outputs. The SYNC pin enables external clock synchronization or logic-level mode selection, while TR/SS provides soft-start and tracking control with internal 2.2µA pull-up and fault-discharge circuitry unique to the AC-1 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - supports wide industrial and automotive battery rails including cold-crank (≥3V min) |
| Quiescent Current | 2.5µA @ 12VIN→3.3VOUT - enables multi-year battery life in always-on IoT and telematics |
| Feedback Reference | 0.800V ±6mV - enables precise low-output-voltage regulation with minimal divider current |
| Max Output Current | 3.5A continuous - sustains full load under 150°C junction temperature with proper PCB thermal design |
| Min On-Time | 30ns - supports high step-down ratios (e.g., 42V→3.3V) at 2MHz switching without pulse skipping |
| Switching Frequency | 200kHz–2.2MHz (LT8610AC); 1.5MHz–2.2MHz (LT8610AC-1) - enables compact magnetics and EMI filtering |
| Dropout Voltage | 200mV @ 1A - maintains regulation during deep input sags common in automotive environments |
| Thermal Rating | –40°C to +150°C junction - qualified per AEC-Q100 Grade H for under-hood automotive use |
Pinout & Package
LT8610ACHMSE#TRPBF uses a 16-lead plastic MSOP package with exposed thermal pad (Pin 17), θJC(PAD) = 10°C/W. The exposed pad must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock sync input | Ground for low-ripple Burst Mode; tie to logic high or external clock for pulse-skipping or synchronization |
| TR/SS (2) | Soft-start & tracking control | Capacitor-programmed voltage ramp; internal 2.2µA pull-up; discharged during dropout to reduce overshoot (AC-1) |
| RT (3) | Frequency programming | Resistor-to-ground sets switching frequency (200kHz–2.2MHz for AC; 1.5MHz–2.2MHz for AC-1) |
| EN/UV (4) | Enable & undervoltage lockout | Hysteretic threshold: 1.015V rise / 0.97V fall - enables input brownout protection with external resistor divider |
| 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 |
| GND (8) | Analog/digital ground | Return path for bottom switch and control circuits; tie to exposed pad (Pin 17) |
| SW (9,10,11) | Power switch node | Connects to inductor and BST capacitor; requires minimal PCB trace area for EMI reduction |
| BST (12) | Bootstrap supply | Drives top switch gate; requires 0.1µF ceramic capacitor placed adjacent to IC |
| INTVCC (13) | Internal 3.4V regulator output | Bypass with ≥1µF ceramic; supplies drivers/control; sourced from BIAS if >3.1V, else from VIN |
| BIAS (14) | Efficiency-boost bias input | Tie to VOUT ≥3.3V to reduce VIN current draw and improve light-load efficiency |
| PG (15) | Power good flag | Open-drain output active when VOUT within ±8% of target and no faults - valid above 3.0V VIN |
| FB (16) | Feedback input | Regulated to 0.800V; connects to resistor divider tap; requires 4.7–10pF phase-lead capacitor to VOUT |
| GND (17) | Exposed thermal pad | Must be soldered to PCB ground plane - primary thermal path and low-inductance 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 | Enables >10-year battery life in always-on vehicle modules (e.g., CAN wake-up receivers) |
| 30ns minimum on-time | Supports direct 42V-to-3.3V conversion at 2MHz without requiring intermediate stages |
| EMI-optimized Silent Switcher® architecture | Reduced radiated emissions via symmetrical SW node layout and integrated bootstrap capacitor path |
| Programmable soft-start & tracking | TR/SS pin allows controlled ramp rate and seamless power sequencing with other rails |
| BIAS pin efficiency enhancement | Reduces VIN current draw by >50% at light loads when VOUT ≥3.3V is tied to BIAS |
Applications
| Automotive Infotainment Power | GSM/Baseband RF Power Supply |
|---|---|
Use Scenario: Powering SoC core, DDR memory, and display interfaces in head units with cold-crank resilience. IC Role / Device Role / Timing Role: Primary 3.3V/1.8V/1.1V buck regulator delivering up to 3.5A with <2.5µA standby IQ. Use Value: Maintains regulation during 3.0V battery sags; meets CISPR-25 Class 5 EMI limits without shielding. | Use Scenario: Generating clean 3.3V supply for GSM transceiver PA bias and baseband processor. IC Role / Device Role / Timing Role: High-frequency (2MHz) synchronous buck converter minimizing inductor size and ripple noise. Use Value: 30ns on-time enables stable 3.3V output from 4.5–42V input; Burst Mode extends battery runtime. |
| Industrial Sensor Node | Telematics Control Unit (TCU) |
Use Scenario: Powering ultra-low-power MCU, BLE radio, and analog front-end in battery-operated field sensors. IC Role / Device Role / Timing Role: Always-on step-down regulator with programmable soft-start and PG monitoring. Use Value: 2.5µA IQ enables 10+ year coin-cell operation; PG flag enables firmware-controlled power sequencing. | Use Scenario: Providing 5V and 3.3V rails for GPS, cellular modem, and CAN controller in vehicle black boxes. IC Role / Device Role / Timing Role: AEC-Q100 qualified buck regulator supporting ISO 7637-2 pulse 4 (cold crank) and pulse 5a (load dump). Use Value: 42V absolute max rating and 200mV dropout withstand harsh automotive transients without reset. |
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 |
|---|---|---|---|
| LT8610ACEMSE#TRPBF | Same silicon, –40°C to +125°C junction rating; no AEC-Q100 qualification | Suitable for industrial, not automotive under-hood use | Select when automotive qualification is unnecessary and cost sensitivity is higher |
| LT8610ACHMSE-1#TRPBF | Internal compensation optimized for >1.5MHz operation; includes TR/SS discharge circuit for reduced dropout overshoot | Better transient response at 2MHz; preferred for high-frequency, low-overshoot designs | Select when operating ≥1.5MHz and requiring improved dynamic performance exiting brownout |
Compared with LT8610ACHMSE#TRPBF, the LT8610ACEMSE#TRPBF offers identical electrical specs but lacks automotive qualification and high-temp reliability, while the LT8610ACHMSE-1#TRPBF trades wider frequency range (200kHz–2.2MHz) for enhanced 1.5–2.2MHz stability and reduced output overshoot during recovery - making it optimal for high-frequency automotive subsystems.
Availability
LT8610ACHMSE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, telematics control units, and industrial sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT8610ACHMSE#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 industrial, automotive, communications, and healthcare markets.
The LT8610AC product line delivers ultralow-quiescent-current synchronous buck regulators engineered for battery-critical and automotive applications where efficiency, reliability, and EMI performance are non-negotiable.
FAQ
What is the maximum junction temperature rating for LT8610ACHMSE#TRPBF?
The LT8610ACHMSE#TRPBF is guaranteed over a junction temperature range of –40°C to +150°C and is AEC-Q100 qualified for automotive Grade H applications. Its exposed thermal pad (Pin 17) must be soldered to a PCB ground plane to achieve θJC(PAD) = 10°C/W and sustain 3.5A continuous output at 150°C ambient with appropriate board layout.
How does LT8610ACHMSE#TRPBF achieve 2.5µA quiescent current?
The LT8610ACHMSE#TRPBF achieves 2.5µA IQ in Burst Mode by disabling all non-essential circuitry between energy pulses - including oscillator, gate drivers, and error amplifier - while maintaining regulation via periodic charge pulses to the output capacitor. This behavior is enabled by grounding the SYNC pin and confirmed in typical applications with 12VIN → 3.3VOUT at no load.
Can LT8610ACHMSE#TRPBF synchronize to an external clock?
Yes, the LT8610ACHMSE#TRPBF supports external clock synchronization via its SYNC pin (Pin 1). When driven with a TTL/CMOS-compatible clock signal (1.1V–2.4V thresholds), the device aligns its switching edges to the external source and operates in pulse-skipping mode - enabling deterministic EMI reduction and multi-rail timing coordination in complex systems.
What is the purpose of the BIAS pin on LT8610ACHMSE#TRPBF?
The BIAS pin on LT8610ACHMSE#TRPBF provides an auxiliary power path for the internal 3.4V regulator (INTVCC). When connected to VOUT ≥3.3V, it reduces VIN current draw and improves light-load efficiency by >50%. This is especially valuable in 3.3V/5V output applications where BIAS sourcing avoids resistive losses in the VIN path.
Does LT8610ACHMSE#TRPBF support output voltage tracking?
Yes, the LT8610ACHMSE#TRPBF supports output voltage tracking via the TR/SS pin (Pin 2). When a voltage ramp is applied to TR/SS below 0.8V, the FB pin is servoed to match that voltage - enabling controlled startup sequencing with other power rails. An external capacitor to ground programs the slew rate, and the internal 2.2µA pull-up ensures monotonic startup even with no external drive.
LT8610ACHMSE#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):
- 3V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 42V
- 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
LT8610ACHMSE#TRPBF FAQ
1.How can I place an order for LT8610ACHMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610ACHMSE#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 LT8610ACHMSE#TRPBF reliable?
The price and inventory of LT8610ACHMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8610ACHMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610ACHMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610ACHMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610ACHMSE#TRPBF?
LT8610ACHMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610ACHMSE#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 LT8610ACHMSE#TRPBF?
For technical support, including LT8610ACHMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610ACHMSE#TRPBF requirements.
6.How does Aetrix verify that LT8610ACHMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610ACHMSE#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 LT8610ACHMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610ACHMSE#TRPBF?
All LT8610ACHMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610ACHMSE#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 LT8610ACHMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT8610ACHMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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