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Analog Devices Inc. LT8610ABEMSE#PBF
- Part No.:
- LT8610ABEMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610ABEMSE#PBF.pdf
- Description:
- IC REG BUCK ADJ 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:521
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Product details
Overview
LT8610ABEMSE#PBF 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 MOSFETs, internal feedback divider (12.5MΩ), and AEC-Q100 qualification for automotive power supplies requiring ultra-low IQ and high efficiency at light loads.
For engineers reviewing the LT8610ABEMSE#PBF datasheet, LT8610ABEMSE#PBF pinout, LT8610ABEMSE#PBF application, or LT8610ABEMSE#PBF equivalent, key selection criteria include its 3.4V–42V input range, 91% light-load efficiency (vs. 82% for LT8610A), ±9% power-good threshold, and MSOP-16 package with exposed thermal pad.
Technical Context
The LT8610ABEMSE#PBF implements constant-frequency current-mode control with RT-programmable switching frequency (200kHz–2.2MHz) and frequency foldback during start-up or overcurrent. Its dual-MOSFET synchronous architecture uses a 120mΩ top NMOS and 65mΩ bottom NMOS, enabling low dropout (200mV @ 1A) and safe inductor saturation tolerance.
Burst Mode operation shuts down all control circuitry between switching bursts to achieve 2.5µA IQ, while the LT8610AB variant improves light-load efficiency via higher Burst Mode current limit (1A vs. 400mA in LT8610A), trading off increased output ripple-mitigated by larger COUT.
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 without external pre-regulation. |
| Output Voltage | Fixed 5.00V ±1.5% - internally trimmed; eliminates external resistor divider and reduces BOM count and IQ load. |
| Max Output Current | 3.5A continuous - enables single-chip 5V/3.5A supply for ECUs, infotainment, or camera modules. |
| Quiescent Current | 2.5µA at no load - sustains >1-year battery life in always-on automotive modules (e.g., telematics wake-up circuits). |
| Min On-Time | 30ns - allows high VIN-to-VOUT conversion ratios (e.g., 42V→5V @ 700kHz) without pulse-skipping instability. |
| Power-Good Threshold | ±9% of VOUT - provides reliable system reset signaling under line/load transients without external comparators. |
| Thermal Rating | –40°C to +125°C junction - qualified per AEC-Q100 Grade 1 for under-hood automotive environments. |
Pinout & Package
LT8610ABEMSE#PBF uses a thermally enhanced 16-lead MSOP package (MSE) with exposed GND pad (Pin 17) requiring PCB soldering for θJA = 40°C/W. Pin 7 is NC; Pins 5/6 are paralleled VIN inputs; Pins 9/10/11 are paralleled SW outputs; Pin 16 is VOUT (not FB) for fixed-output variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock sync input | Ground for low-ripple Burst Mode; tie to INTVCC or logic high for pulse-skipping; disables frequency foldback when driven externally. |
| TR/SS (2) | Soft-start & tracking control | Capacitor-programmed voltage ramp rate; internal 2.2µA pull-up enables simple soft-start; pulled low during fault/shutdown. |
| RT (3) | Frequency programming | Resistor to GND sets fSW from 200kHz to 2.2MHz; determines minimum on-time compliance and EMI profile. |
| EN/UV (4) | Enable & input UVLO | 1.00V rising threshold with 40mV hysteresis; enables VIN undervoltage lockout or controlled shutdown. |
| VIN (5,6) | Main power input | Paralleled inputs for low-impedance path to top switch and internal circuitry; require local 1µF ceramic bypass. |
| NC (7) | No connect | Not bonded; must be left unconnected or grounded per layout best practice. |
| GND (8) | Signal & power return | Return path for bottom switch and analog circuitry; must be tied to exposed pad (Pin 17) for thermal and electrical integrity. |
| VOUT (16) | Regulated output | 5.00V fixed output node; connects to internal 12.5MΩ feedback divider; requires ≥47µF output capacitance for stability and ripple suppression. |
| PG (15) | Power-good flag | Open-drain output active-high when VOUT is within ±9% of regulation and no faults (TSD, UVLO, OCP) are present. |
| BIAS (14) | Internal regulator bias | Tie to VOUT ≥3.3V to reduce VIN current draw; lowers total IQ and improves efficiency across full load range. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive under-hood use (-40°C to +125°C), including HTOL, TC, and ESD testing per stress test plan. |
| Ultralow 2.5µA quiescent current | Enables >1-year battery runtime in always-on vehicle systems (e.g., CAN bus wake-up receivers, alarm sensors) without compromising regulation. |
| 30ns minimum on-time | Supports direct 42V→5V conversion at 700kHz, eliminating need for cascaded regulators and reducing component count in high-input systems. |
| Integrated 12.5MΩ feedback divider | Removes external resistors, cuts BOM cost, and eliminates divider current-induced IQ penalty-critical for microamp-level standby designs. |
| Exposed thermal pad (Pin 17) | Reduces θJA to 40°C/W, allowing 3.5A continuous operation at +85°C ambient without heatsink in standard 2-layer PCB layouts. |
Applications
| Automotive ECU Power Supply | GSM Base Station RF Module |
|---|---|
Use Scenario: Primary 5V rail for engine control unit microcontroller, CAN transceiver, and sensor interfaces in vehicles with 12V/24V battery systems subject to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Synchronous buck converter providing regulated 5V/3.5A with ultralow IQ to meet ISO 16750-2 cold-crank requirements and maintain CAN node wake-up capability. Use Value: 2.5µA IQ extends battery life during vehicle dormancy; 42V absolute max rating withstands 87V load dump pulses; AEC-Q100 ensures reliability over 15-year vehicle lifetime. | Use Scenario: Point-of-load regulator for GSM power amplifier stages requiring stable 5V supply with minimal noise coupling into sensitive RF front-end circuits. IC Role / Device Role / Timing Role: High-efficiency DC/DC converter delivering clean 5V power with low EMI and fast transient response to support PA burst transmission modes. Use Value: 30ns min on-time enables high-frequency operation (700kHz+) to shift switching noise above critical RF bands; integrated power MOSFETs reduce layout parasitics and improve PSRR. |
| Industrial IoT Sensor Hub | Medical Portable Diagnostic Device |
Use Scenario: Central power management IC for battery-powered wireless sensor nodes collecting temperature, humidity, and vibration data in remote industrial facilities. IC Role / Device Role / Timing Role: Primary step-down regulator converting Li-ion (3.0–4.2V) or 24V field bus to 5V for MCU, BLE radio, and analog front-end, operating in Burst Mode during sleep cycles. Use Value: 2.5µA IQ extends 2000mAh battery life to >10 years in 1-minute sampling intervals; wide VIN range supports both battery and field bus operation without redesign. | Use Scenario: Power supply for handheld ultrasound or glucose monitor with strict battery life targets and low-noise analog signal chain requirements. IC Role / Device Role / Timing Role: Low-ripple, low-IQ 5V source for ADC reference, op-amps, and display backlight drivers in Class II medical devices. Use Value: Fixed 5V output eliminates resistor divider errors affecting ADC accuracy; 91% light-load efficiency (LT8610AB) minimizes self-heating near patient-contact sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8610AEMSE-5#PBF | Same 5V fixed output, 3.5A rating, and package-but 82% light-load efficiency (vs. 91% for LT8610ABEMSE#PBF) and higher output ripple in Burst Mode. | Suitable where lowest possible IQ is secondary to ripple-sensitive analog circuits; lacks LT8610AB's improved light-load efficiency. | Select LT8610AEMSE-5#PBF if system prioritizes lower output ripple over peak light-load efficiency. |
| LM61480RQRJR | 42V, 8A buck with 15µA IQ, adjustable output, and spread-spectrum EMI reduction-but no AEC-Q100 qualification or fixed 5V option. | Targets higher-current industrial applications; requires external feedback resistors and lacks automotive reliability validation. | Choose LM61480RQRJR for non-automotive 8A designs needing EMI mitigation, not drop-in replacement for LT8610ABEMSE#PBF. |
Compared with LT8610AEMSE-5#PBF, the LT8610ABEMSE#PBF delivers 9% higher light-load efficiency at the cost of slightly higher output ripple-making it optimal for battery-critical automotive modules. Versus LM61480RQRJR, it trades higher current capability for AEC-Q100 assurance and simpler fixed-output implementation.
Availability
LT8610ABEMSE#PBF is available at Aetrix Electronics and suitable for automotive ECU power supplies, GSM RF module regulation, and industrial IoT sensor hubs requiring stable component supply with AEC-Q100 compliance and long-term lifecycle support.
Supply support for LT8610ABEMSE#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 with precision power, sensing, and interface solutions.
The LT8610A/LT8610AB series was designed specifically for automotive and industrial applications demanding ultralow quiescent current, wide input voltage range, and AEC-Q100 reliability-enabling always-on functionality in battery-powered systems.
FAQ
What is the guaranteed output voltage tolerance for LT8610ABEMSE#PBF?
The LT8610ABEMSE#PBF delivers a fixed 5.00V output with guaranteed tolerance of ±1.5% over temperature and line/load conditions, as specified in the Electrical Characteristics table (min/max 4.94V to 5.06V at ILOAD = 0.5A). This tight regulation is achieved via laser-trimmed internal 12.5MΩ feedback resistors, eliminating external component drift.
Does LT8610ABEMSE#PBF require an external feedback resistor divider?
No, the LT8610ABEMSE#PBF does not require an external feedback resistor divider. As a fixed 5V output variant, it integrates a precision 12.5MΩ internal resistor network connecting VOUT to the internal 0.97V reference, removing external components and associated IQ losses-critical for achieving its 2.5µA quiescent current specification.
How does the LT8610ABEMSE#PBF differ from the LT8610AEMSE-5#PBF?
The LT8610ABEMSE#PBF improves light-load efficiency to 91% (vs. 82% for LT8610AEMSE-5#PBF) through a higher Burst Mode current limit (1A vs. 400mA), but exhibits proportionally higher output ripple. Both share identical 3.5A rating, 30ns min on-time, and AEC-Q100 qualification-making LT8610ABEMSE#PBF optimal for battery-sensitive automotive applications.
What thermal design considerations apply to LT8610ABEMSE#PBF?
The LT8610ABEMSE#PBF requires soldering of its exposed thermal pad (Pin 17) to a PCB copper pour to achieve θJA = 40°C/W. For 3.5A continuous operation at +85°C ambient, a minimum 200mm² 2-oz copper area is recommended. Thermal vias (≥6×0.3mm) beneath the pad are essential to transfer heat to inner layers or ground planes.
Can LT8610ABEMSE#PBF synchronize to an external clock?
Yes, the LT8610ABEMSE#PBF supports external clock synchronization via its SYNC pin (Pin 1). Applying a logic-level clock signal (1.1V–2.4V thresholds) aligns switching edges to the external source, enabling EMI reduction through frequency dithering or system-level timing coordination-while disabling frequency foldback during normal operation.
LT8610ABEMSE#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:
- 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#PBF FAQ
1.How can I place an order for LT8610ABEMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610ABEMSE#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 LT8610ABEMSE#PBF reliable?
The price and inventory of LT8610ABEMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8610ABEMSE#PBF is usually 5 days.
3.What payment methods are accepted for LT8610ABEMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610ABEMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610ABEMSE#PBF?
LT8610ABEMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610ABEMSE#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 LT8610ABEMSE#PBF?
For technical support, including LT8610ABEMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610ABEMSE#PBF requirements.
6.How does Aetrix verify that LT8610ABEMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LT8610ABEMSE#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 LT8610ABEMSE#PBF meets industry standards.
7.What is the process for return or replacement of LT8610ABEMSE#PBF?
All LT8610ABEMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610ABEMSE#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 LT8610ABEMSE#PBF part is unused and in its original packaging.
Return procedure for LT8610ABEMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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