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Analog Devices Inc. LT8610ABEMSE-5#PBF
- Part No.:
- LT8610ABEMSE-5#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610ABEMSE-5#PBF.pdf
- Description:
- IC REG BUCK 5V 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:236
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Product details
Overview
LT8610ABEMSE-5#PBF from Analog Devices is a 42V, 3.5A synchronous step-down regulator with 2.5µA quiescent current, fixed 5V output, 30ns minimum on-time, and AEC-Q100 qualification for automotive power supplies. It delivers 91% light-load efficiency in Burst Mode and supports 200kHz–2.2MHz programmable switching frequency via RT pin.
For engineers reviewing the LT8610ABEMSE-5#PBF datasheet, LT8610ABEMSE-5#PBF pinout, LT8610ABEMSE-5#PBF application, or LT8610ABEMSE-5#PBF equivalent, this page provides verified technical context, package mapping, real-world application cards, and two validated alternative parts for 5V/3.5A automotive and industrial DC/DC conversion.
Technical Context
The LT8610ABEMSE-5#PBF integrates a 120mΩ top NMOS and 65mΩ bottom NMOS in a monolithic current-mode architecture, enabling fast transient response and stable regulation down to 200mV dropout at 1A. Its internal 0.97V reference and ±9% PG threshold provide precise output monitoring under varying load and input conditions.
Burst Mode operation is enabled by grounding SYNC, delivering ultralow 2.5µA IQ at no load while maintaining regulation; pulse-skipping mode activates when SYNC is pulled high or driven externally, increasing IQ to several hundred µA but eliminating low-frequency ripple. The BIAS pin reduces VIN current draw when tied to VOUT ≥ 3.3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.00V ±1.5%, internally trimmed via 12.5MΩ feedback divider - eliminates external resistor network and reduces no-load current. |
| Max Output Current | 3.5A continuous - supports high-current automotive modules (e.g., ADAS sensors, infotainment) without external current sharing. |
| Quiescent Current | 2.5µA at 12VIN→5VOUT no load - enables always-on systems (e.g., telematics, CAN gateways) with multi-year battery life. |
| Min On-Time | 30ns - enables high step-down ratios (e.g., 42VIN→5VOUT at 2MHz) without pulse skipping or instability. |
| Switching Frequency | 200kHz–2.2MHz, RT-programmable - allows EMI optimization and inductor size reduction while maintaining >93% efficiency at 1A. |
| PG Accuracy | ±9% output voltage window - ensures reliable power-good signaling for microcontrollers and FPGAs during brown-out recovery. |
| AEC-Q100 Grade | Grade E (–40°C to +125°C junction) - qualified for engine bay, body control, and ADAS applications per automotive reliability standards. |
Pinout & Package
16-lead thermally enhanced MSOP package with exposed GND pad (Pin 17), θJA = 40°C/W. Requires soldering of exposed pad to PCB for thermal performance and EMI suppression.
| 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 - determines IQ vs. ripple trade-off. |
| TR/SS (2) | Soft-start and tracking control | Capacitor-programmed voltage ramp rate; enables controlled startup and supply sequencing with other rails. |
| RT (3) | Frequency programming resistor | Resistor to GND sets switching frequency (e.g., 60.4kΩ → 700kHz); enables EMI compliance and layout optimization. |
| EN/UV (4) | Enable and input undervoltage lockout | 1.00V rising threshold with 40mV hysteresis - supports programmable VIN cutoff and system-level power sequencing. |
| VIN (5,6) | Main input power supply | Dual pins reduce trace inductance and IR drop; require local 1µF ceramic bypass close to pins. |
| NC (7) | No connect | Internally unconnected - must remain floating or grounded per layout guidelines; no routing required. |
| GND (8) | Power and signal ground return | Return path for bottom switch and control circuitry; must be tied to exposed pad (Pin 17) for thermal and noise integrity. |
| SW (9,10,11) | Switch node output | High-current connection to inductor and BST capacitor; requires minimal copper area to limit EMI and ringing. |
| BST (12) | Bootstrap capacitor connection | 0.1µF ceramic capacitor between BST and SW - enables high-side NMOS gate drive above VIN. |
| INTVCC (13) | Internal 3.4V regulator bypass | Requires ≥1µF low-ESR ceramic cap to GND; powers internal logic and drivers - not for external loads. |
| BIAS (14) | Efficiency-optimized bias supply | Tie to VOUT (≥3.3V) to source INTVCC from BIAS instead of VIN - reduces input current and improves full-load efficiency. |
| PG (15) | Open-drain power-good flag | Pulls low if VOUT deviates >±9% or fault occurs; valid above 3.4VIN - used for MCU reset assertion and system health monitoring. |
| VOUT (16) | Regulated 5V output | Fixed 5V output pin with internal 12.5MΩ divider - connects directly to load; no external feedback components needed. |
| GND (17) | Exposed thermal pad | Mandatory solder connection to PCB ground plane - reduces θJA by ~20°C and improves EMI immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow 2.5µA quiescent current | Enables >10-year battery life in always-on automotive modules (e.g., keyless entry, tire pressure monitors) without compromising regulation. |
| 30ns minimum on-time | Supports high-frequency, high-input-voltage designs (e.g., 42V→5V at 2MHz) without duty-cycle limitation or forced PWM artifacts. |
| 91% light-load Burst Mode efficiency | Reduces thermal stress and extends runtime in intermittent-load applications like radar sleep modes and sensor polling cycles. |
| AEC-Q100 Grade E qualification | Validated for automotive use across –40°C to +125°C junction temperature - meets reliability requirements for safety-critical ECUs. |
| Integrated 5V fixed-output topology | Eliminates external feedback resistors and compensation components - reduces BOM count, board space, and design validation effort. |
| Programmable soft-start via TR/SS | Prevents inrush current and output overshoot during cold start or hot-plug events - critical for FPGA and DSP power sequencing. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powers SoC, display interface, and audio codec in head unit with 12V vehicle battery input and strict EMC requirements. IC Role / Device Role / Timing Role: Primary 5V/3.5A buck converter providing clean, low-noise rail with programmable frequency to avoid AM band interference. Use Value: 2.5µA IQ extends battery drain time during vehicle sleep mode; 30ns on-time enables 2MHz operation to shrink filter components. |
Use Scenario: Supplies image sensor and ISP in forward-facing camera with rapid wake-up from standby and thermal constraints. IC Role / Device Role / Timing Role: High-efficiency 5V regulator with fast transient response and PG flag for sensor initialization handshake. Use Value: 91% Burst Mode efficiency minimizes self-heating in sealed camera housing; AEC-Q100 Grade E ensures field reliability. |
| Industrial IoT Gateway | Railway Telematics Unit |
|
Use Scenario: Powers ARM Cortex-M7 MCU, LTE modem, and isolated RS-485 transceivers in remote monitoring node with wide-input 24–48VDC supply. IC Role / Device Role / Timing Role: Input-flexible 5V step-down regulator supporting 3.4–42V input range and EN/UV programmable undervoltage lockout. Use Value: 42V absolute max rating withstands 48VDC surge transients; PG flag synchronizes firmware boot with stable 5V rail. |
Use Scenario: Provides 5V rail for GPS module, cellular radio, and data logger in train-mounted telematics box subjected to vibration and wide ambient temperatures. IC Role / Device Role / Timing Role: Automotive-grade buck converter with exposed-pad MSOP package for robust thermal performance in convection-cooled enclosures. Use Value: Exposed GND pad ensures <125°C junction temp at full load in -40°C to +70°C ambient; TR/SS enables controlled startup after power interruption. |
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#PBF | Same 5V fixed output and 3.5A rating, but 82% light-load Burst Mode efficiency (vs. 91% for LT8610ABEMSE-5#PBF) and higher output ripple. | Preferred where ultra-low ripple is prioritized over peak light-load efficiency (e.g., analog sensor bias rails). | Select LT8610AEMSE-5#PBF if system-level EMI filtering budget is limited and ripple-sensitive analog circuits share the 5V rail. |
| LM61480RQWR | TI 5V/5A buck with 15µA IQ, 4.2V–36V input, no AEC-Q100 grade, and different pinout (16-pin WQFN). | Suitable for industrial/commercial designs lacking automotive qualification requirements. | Choose LM61480RQWR only for non-automotive applications requiring >3.5A or wider input range; not drop-in compatible due to pinout and thermal pad differences. |
Compared with LT8610AEMSE-5#PBF, the LT8610ABEMSE-5#PBF trades slightly higher light-load ripple for significantly improved efficiency - ideal for battery-constrained automotive modules. Compared with LM61480RQWR, it offers AEC-Q100 qualification and lower IQ but lower max current and narrower input range.
Availability
LT8610ABEMSE-5#PBF is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and industrial IoT gateways requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LT8610ABEMSE-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 DC/DC conversion where ultralow quiescent current, high input voltage tolerance, and AEC-Q100 reliability are mandatory.
FAQ
What is the maximum input voltage rating for the LT8610ABEMSE-5#PBF?
The LT8610ABEMSE-5#PBF has an absolute maximum input voltage rating of 42V on the VIN pins. This allows direct connection to 36V nominal industrial buses or 48V telecom systems with margin for transients. Operation above 42V risks permanent damage, and the device includes internal VIN UVLO that disables switching below 3.4V to prevent erratic behavior.
Does the LT8610ABEMSE-5#PBF require external feedback resistors to set the 5V output?
No, the LT8610ABEMSE-5#PBF does not require external feedback resistors. It features an internal 12.5MΩ resistor divider that fixes the output to 5.00V ±1.5%. This eliminates external components, reduces no-load current, and improves accuracy over temperature compared to discrete resistor networks - a key advantage of the -5 suffix variant.
How does the BIAS pin improve efficiency in the LT8610ABEMSE-5#PBF?
The BIAS pin on the LT8610ABEMSE-5#PBF sources current for the internal 3.4V regulator (INTVCC) when tied to VOUT ≥ 3.3V, reducing VIN current draw and improving full-load efficiency by up to 1.5%. For the 5V output version, connecting BIAS directly to VOUT lowers total input current and thermal dissipation - especially beneficial in high-ambient-temperature automotive environments.
What is the purpose of the exposed pad (Pin 17) on the LT8610ABEMSE-5#PBF MSOP package?
The exposed pad (Pin 17) on the LT8610ABEMSE-5#PBF is a thermal and electrical GND connection that must be soldered to the PCB ground plane. It reduces thermal resistance (θJA by ~20°C) and improves EMI immunity. Leaving it unconnected degrades thermal performance, increases junction temperature, and may cause premature thermal shutdown or reduced lifetime - especially at 3.5A continuous load.
Can the LT8610ABEMSE-5#PBF be synchronized to an external clock, and how is this configured?
Yes, the LT8610ABEMSE-5#PBF can be synchronized to an external clock via the SYNC pin (Pin 1). To enable synchronization, drive SYNC with a logic-level square wave within 0.8V–2.4V swing and 200kHz–2.2MHz range. When synchronized, the device operates in pulse-skipping mode with aligned SW transitions - eliminating subharmonic beat frequencies and simplifying EMI filter design.
LT8610ABEMSE-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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT8610ABEMSE-5#PBF FAQ
1.How can I place an order for LT8610ABEMSE-5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610ABEMSE-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 LT8610ABEMSE-5#PBF reliable?
The price and inventory of LT8610ABEMSE-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 LT8610ABEMSE-5#PBF is usually 5 days.
3.What payment methods are accepted for LT8610ABEMSE-5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610ABEMSE-5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610ABEMSE-5#PBF?
LT8610ABEMSE-5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610ABEMSE-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 LT8610ABEMSE-5#PBF?
For technical support, including LT8610ABEMSE-5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610ABEMSE-5#PBF requirements.
6.How does Aetrix verify that LT8610ABEMSE-5#PBF is sourced from the original manufacturer or authorized distributors?
All LT8610ABEMSE-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 LT8610ABEMSE-5#PBF meets industry standards.
7.What is the process for return or replacement of LT8610ABEMSE-5#PBF?
All LT8610ABEMSE-5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610ABEMSE-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 LT8610ABEMSE-5#PBF part is unused and in its original packaging.
Return procedure for LT8610ABEMSE-5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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