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Analog Devices Inc. LT8610ABEMSE#TRPBF
- Part No.:
- LT8610ABEMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610ABEMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,858
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Product details
Overview
LT8610ABEMSE#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 fixed 5V output. It features integrated power switches, internal feedback divider (12.5MΩ), and AEC-Q100 qualification for automotive power supplies requiring high efficiency at light loads and robust input voltage range.
For engineers reviewing the LT8610ABEMSE#TRPBF datasheet, LT8610ABEMSE#TRPBF pinout, LT8610ABEMSE#TRPBF application, or LT8610ABEMSE#TRPBF equivalent, key selection criteria include ultralow IQ regulation (2.5µA @ 12VIN→5VOUT), 30ns min-on-time for high VIN/VOUT ratios, ±9% PG flag accuracy, 16-lead MSOP thermal performance (θJC = 10°C/W), and BIAS pin support for improved efficiency.
Technical Context
The LT8610ABEMSE#TRPBF uses constant-frequency current-mode control with RT-programmable switching frequency (200kHz–2.2MHz) and built-in frequency foldback during start-up or overload. Its synchronous architecture integrates top and bottom NMOS power switches (120mΩ/65mΩ typical RDS(on)) and employs an internal 0.97V reference with ±0.6% initial accuracy over temperature.
Burst Mode operation enables ultralow quiescent current by disabling internal circuitry between switching bursts; the LT8610AB variant improves light-load efficiency versus LT8610A via higher Burst Mode current limit (1A vs 400mA), at the cost of increased output ripple-mitigated by larger output capacitance per design guidelines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.4V to 42V - supports wide automotive battery transients and industrial DC rails without external pre-regulation. |
| Output Voltage | Fixed 5.00V ±1% - internally trimmed; eliminates external feedback resistors and reduces BOM count. |
| Max Output Current | 3.5A continuous - sufficient for powering microcontrollers, sensors, and communication ICs in compact systems. |
| Quiescent Current | 2.5µA @ 12VIN → 5VOUT - enables always-on operation in battery-powered automotive modules with multi-year standby life. |
| Min On-Time | 30ns - allows stable 5V output from up to 42V input at 2MHz switching, critical for high VIN/VOUT conversion. |
| PG Accuracy | ±9% of VOUT - provides reliable power-good signaling for system sequencing and fault detection. |
| Thermal Resistance | θJC(PAD) = 10°C/W - exposed pad (Pin 17) must be soldered to PCB copper for effective heat dissipation in high-current applications. |
Pinout & Package
LT8610ABEMSE#TRPBF is housed in a thermally enhanced 16-lead plastic MSOP package with exposed GND pad (Pin 17). The package measures 4.0mm × 3.0mm × 0.85mm and requires soldering of the exposed pad to PCB ground plane for optimal thermal performance (θJA = 40°C/W, θJC = 10°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock synchronization input | Ground for low-ripple Burst Mode; tie to logic high or external clock for pulse-skipping mode; disables frequency foldback when driven. |
| TR/SS (2) | Soft-start and tracking control | Capacitor-programmed voltage ramp rate; internal 2.2µA pull-up enables simple soft-start; pulled low during fault/shutdown. |
| RT (3) | Switching frequency programming | Resistor-to-ground sets fSW from 200kHz to 2.2MHz; determines inductor size, efficiency trade-offs, and EMI profile. |
| EN/UV (4) | Enable and input undervoltage lockout | 1.00V rising threshold with 40mV hysteresis; enables precise VIN brown-out protection or controlled startup sequencing. |
| VIN (5,6) | Main input power supply | Dual pins reduce trace resistance and inductance; require local 1µF ceramic bypass close to pins for stability and EMI reduction. |
| NC (7) | No connect | Not bonded internally; must remain unconnected to avoid parasitic coupling or mechanical stress. |
| GND (8) | Power and signal ground return | Return path for bottom switch and control circuitry; must be tied to exposed pad (Pin 17) and low-impedance PCB ground plane. |
| SW (9,10,11) | Switch node connection | High dv/dt node connecting to inductor and BST capacitor; requires minimized PCB area and tight layout to reduce EMI and switching losses. |
| BST (12) | Bootstrap supply for top switch gate drive | Requires 0.1µF ceramic capacitor between BST and SW; critical for proper high-side NMOS turn-on and efficiency. |
| INTVCC (13) | Internal 3.4V regulator bypass | Must be decoupled with ≥1µF low-ESR ceramic; supplies internal logic; draws current from BIAS if >3.1V, else from VIN. |
| BIAS (14) | Efficiency-optimized bias supply | Tie to VOUT (≥3.3V) to reduce VIN current draw and improve light-load efficiency; requires local 1µF bypass if externally sourced. |
| PG (15) | Open-drain power-good flag | Asserts high when VOUT is within ±9% of 5V and no faults present; valid above 3.4V VIN regardless of EN/UV state. |
| VOUT (16) | Regulated 5V output | Fixed-output pin with internal 12.5MΩ feedback divider; connects directly to load and output capacitors; not used for adjustable versions. |
| GND (17) | Exposed thermal pad | Electrically and thermally connected to internal GND; must be soldered to PCB copper for thermal management and EMI control. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Rated for automotive applications (-40°C to +125°C junction), supporting reliability-critical infotainment, ADAS, and body electronics. |
| Ultralow 2.5µA IQ in Burst Mode | Enables multi-year battery life in always-on vehicle modules (e.g., telematics, CAN wake-up receivers) without compromising regulation accuracy. |
| 30ns minimum on-time | Supports direct 42V-to-5V conversion at 2MHz, eliminating need for intermediate pre-regulators and reducing board space and component count. |
| Integrated 12.5MΩ feedback divider | Removes external resistor network, minimizes leakage-induced IQ error, and ensures consistent 5V output accuracy across temperature and production lots. |
| BIAS pin efficiency optimization | Reduces total input current by sourcing INTVCC from VOUT instead of VIN, improving full-load efficiency by ~1–2% in 5V-output configurations. |
| Robust fault protection | Includes overtemperature shutdown, cycle-by-cycle current limiting (6.7A top switch), and PG-based fault reporting for system-level diagnostics. |
Applications
| Automotive Infotainment Power | GSM/Cellular Modem Supply |
|---|---|
Use Scenario: Powering DSPs, display controllers, and audio codecs in head units with cold-crank (4.5V) to load-dump (42V) input conditions. IC Role / Device Role / Timing Role: Primary 5V buck converter delivering regulated power with <10mVP-P ripple and fast transient response to dynamic processor loads. Use Value: AEC-Q100 qualification and 42V input rating ensure uninterrupted operation during automotive transients; 2.5µA IQ extends battery backup time during ignition-off states. | Use Scenario: Supplying LTE/GSM modems in telematics control units where low standby current and burst-mode efficiency are critical. IC Role / Device Role / Timing Role: Main 5V rail generator enabling modem sleep modes with minimal wake-up latency and low EMI during data transmission bursts. Use Value: 30ns min-on-time supports efficient 24V-to-5V conversion at high frequency, reducing inductor size; BIAS pin lowers overall system power consumption. |
| Industrial Sensor Hub Power | Automotive Body Control Module (BCM) |
Use Scenario: Providing clean 5V power to multiple I²C/SPI sensors and microcontrollers in distributed industrial nodes powered from 24V DC rails. IC Role / Device Role / Timing Role: Compact, high-efficiency point-of-load regulator with integrated PG signaling for coordinated system reset and health monitoring. Use Value: Fixed 5V output eliminates calibration overhead; ±9% PG accuracy enables reliable firmware boot validation before peripheral initialization. | Use Scenario: Powering door modules, seat controllers, and lighting drivers requiring robustness against automotive EMI and long-term reliability. IC Role / Device Role / Timing Role: Primary 5V supply with EN/UV-controlled sequencing and thermal protection for safety-critical subsystems. Use Value: Exposed-pad MSOP package delivers low thermal resistance in confined BCM enclosures; 125°C operating range supports under-hood placement. |
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 |
|---|---|---|---|
| LT8610AEMSE-5#TRPBF | Same 5V fixed output, 3.5A rating, and 30ns min-on-time, but lower light-load efficiency (82% vs 91% at 1mA) and higher Burst Mode ripple. | Suitable for cost-sensitive designs where peak efficiency at ultra-light loads is secondary to lowest possible output ripple. | Select when minimizing output voltage perturbation during sleep mode is more critical than absolute standby current. |
| LT8640S-5#TRPBF | Higher 6A output, 40V max input, 2.5µA IQ, but requires external feedback resistors and lacks integrated 5V divider; supports spread-spectrum and higher fSW (up to 4MHz). | Preferred for next-generation designs needing scalability, programmability, or tighter EMI compliance beyond LT8610AB's fixed-output constraints. | Choose when future-proofing for variable output voltages or higher current headroom is required, accepting added BOM complexity. |
Compared with LT8610AEMSE-5#TRPBF, the LT8610ABEMSE#TRPBF delivers significantly higher light-load efficiency (91% vs 82% at 1mA) at the expense of greater output ripple-addressable with additional output capacitance. Versus LT8640S-5#TRPBF, it trades programmability and current headroom for simplicity, smaller footprint, and guaranteed 5V accuracy without external components.
Availability
LT8610ABEMSE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, GSM modem power, and industrial sensor hub applications requiring stable component supply, AEC-Q100 compliance, and ultralow quiescent current performance.
Supply support for LT8610ABEMSE#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 with precision power, sensing, and timing solutions.
The LT8610AB series belongs to Analog Devices' Silent Switcher®-compatible monolithic buck regulator product line, designed specifically for noise-sensitive automotive and industrial applications demanding ultralow EMI, high efficiency across load ranges, and robust operation under harsh electrical environments.
FAQ
What is the maximum input voltage rating for the LT8610ABEMSE#TRPBF?
The LT8610ABEMSE#TRPBF has an absolute maximum input voltage rating of 42V on the VIN pins, with recommended operating range from 3.4V to 42V. This enables direct use in 24V and 36V industrial systems and automotive applications subject to load dump transients, provided external input protection (e.g., TVS) is implemented per design requirements.
Does the LT8610ABEMSE#TRPBF require external feedback resistors for 5V output?
No, the LT8610ABEMSE#TRPBF does not require external feedback resistors for 5V output. It integrates a precision 12.5MΩ internal feedback divider that regulates the VOUT pin to 5.00V ±1%, eliminating external components and associated tolerance errors-critical for maintaining accuracy and minimizing quiescent current in battery-powered systems.
How does the BIAS pin improve efficiency in the LT8610ABEMSE#TRPBF?
The BIAS pin on the LT8610ABEMSE#TRPBF allows the internal 3.4V regulator (INTVCC) to draw current from the 5V output rail instead of VIN when biased above 3.1V. This reduces total input current draw, improving full-load efficiency by approximately 1–2% and lowering thermal stress on the input stage-especially beneficial in high-current 5V applications like modem power supplies.
What is the purpose of the exposed pad (Pin 17) on the LT8610ABEMSE#TRPBF package?
The exposed pad (Pin 17) on the LT8610ABEMSE#TRPBF is electrically connected to GND and serves as the primary thermal conduction path. With θJC(PAD) = 10°C/W, it must be soldered to a large PCB copper area to dissipate heat effectively. Failure to do so risks thermal shutdown under 3.5A load and degrades long-term reliability in automotive or industrial ambient temperatures.
Can the LT8610ABEMSE#TRPBF synchronize to an external clock?
Yes, the LT8610ABEMSE#TRPBF can synchronize to an external clock via the SYNC pin (Pin 1). When driven with a logic-compatible square wave (0.8V–2.4V thresholds), the device aligns its switching edges to the external clock and operates in pulse-skipping mode-disabling frequency foldback and enabling deterministic EMI reduction in noise-sensitive systems such as automotive radar or audio subsystems.
LT8610ABEMSE#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 ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT8610ABEMSE#TRPBF FAQ
1.How can I place an order for LT8610ABEMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610ABEMSE#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 LT8610ABEMSE#TRPBF reliable?
The price and inventory of LT8610ABEMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8610ABEMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610ABEMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610ABEMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610ABEMSE#TRPBF?
LT8610ABEMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610ABEMSE#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 LT8610ABEMSE#TRPBF?
For technical support, including LT8610ABEMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610ABEMSE#TRPBF requirements.
6.How does Aetrix verify that LT8610ABEMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610ABEMSE#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 LT8610ABEMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610ABEMSE#TRPBF?
All LT8610ABEMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610ABEMSE#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 LT8610ABEMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT8610ABEMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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