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Analog Devices Inc. LT8610AEMSE-5#PBF
- Part No.:
- LT8610AEMSE-5#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610AEMSE-5#PBF.pdf
- Description:
- IC REG BUCK 5V 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:8,076
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Product details
Overview
LT8610AEMSE-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 operates across 3.4V–42V input, delivers low-noise regulation in Burst Mode, and integrates soft-start, power-good signaling, and external frequency synchronization.
For engineers reviewing the LT8610AEMSE-5#PBF datasheet, LT8610AEMSE-5#PBF pinout, LT8610AEMSE-5#PBF application, or LT8610AEMSE-5#PBF equivalent, this page provides verified package mapping (16-lead MSOP), confirmed pin functions (including SYNC, TR/SS, PG, BIAS), real-world efficiency curves at 5VOUT, and validated alternatives for automotive-grade 5V DC/DC conversion.
Technical Context
The LT8610AEMSE-5#PBF implements constant-frequency current-mode control with internal 0.97V reference and programmable oscillator (200kHz–2.2MHz via RT pin). Its synchronous architecture uses integrated top/bottom NMOS switches (120mΩ/65mΩ typical RDS(on)) and supports bias-sourcing from VOUT to reduce VIN current.
Burst Mode operation enables ultralow IQ regulation (2.5µA at no load, 12VIN→5VOUT), while the PG flag asserts when VOUT reaches ±9% of 5.00V and remains valid above 3.4VIN. The device features thermal shutdown, input UVLO (1V EN/UV threshold), and frequency foldback during startup or overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.00V ±0.6% (guaranteed over –40°C to 125°C junction temp) |
| Max Output Current | 3.5A continuous - supports high-current automotive ECUs without external boost circuitry |
| Input Voltage Range | 3.4V to 42V - compatible with 12V/24V vehicle batteries including cold-crank and load-dump transients |
| Quiescent Current | 2.5µA in Burst Mode - enables always-on systems (e.g., telematics, ADAS sensors) with multi-year battery life |
| Min On-Time | 30ns - allows high step-down ratios (e.g., 42VIN→5VOUT at 2MHz) without pulse skipping |
| Switching Frequency | 200kHz–2.2MHz (RT-programmable) - enables EMI optimization and small external component selection |
| Dropout Voltage | 200mV at 1A - maintains regulation during low-input conditions (e.g., engine cranking at 5.5VIN) |
Pinout & Package
LT8610AEMSE-5#PBF is housed in a thermally enhanced 16-lead plastic MSOP package (MSE) with exposed GND pad (Pin 17) requiring PCB soldering for thermal performance (θJA = 40°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock input | Enables synchronization to external source or forces pulse-skipping mode when tied high; must not be floated |
| TR/SS (2) | Soft-start & tracking control | Capacitor-programmable voltage ramp rate; pulls to GND via 230Ω during fault/shutdown |
| RT (3) | Oscillator frequency set | Resistor-to-GND sets switching frequency (e.g., 60.4kΩ → 700kHz); enables EMI tuning |
| EN/UV (4) | Enable & input UVLO | 1.00V rising threshold enables operation; 0.96V hysteresis prevents chatter during brownout |
| VIN (5,6) | Main power input | Dual pins reduce IR drop; require local 1µF ceramic bypass close to pins |
| NC (7) | No connect | Internally unconnected - leave unpopulated or grounded per layout best practice |
| GND (8) | Power ground return | Return path for bottom switch; must tie to exposed pad (Pin 17) for thermal conduction |
| SW (9,10,11) | Switch node | High-current output to inductor/boost cap; requires minimal PCB area to limit EMI |
| BST (12) | Bootstrap supply | Drives top switch gate; requires 0.1µF ceramic cap placed adjacent to IC |
| INTVCC (13) | Internal 3.4V regulator | Bypassed with ≥1µF ceramic; powers control logic; draws from BIAS if >3.1V |
| BIAS (14) | Bias supply select | Tie to VOUT (5V) to reduce VIN current and improve light-load efficiency |
| PG (15) | Power-good flag | Open-drain output active when VOUT within ±9% of 5.00V and no faults detected |
| VOUT (16) | Regulated output | Fixed 5V output with internal 12.5MΩ feedback divider; no external resistors needed |
| GND (17) | Exposed thermal pad | Mandatory PCB solder connection for thermal management and electrical grounding |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Rated for automotive applications (–40°C to 125°C junction temp) with full reliability testing |
| Ultralow IQ Burst Mode | 2.5µA input current at no load enables always-on functionality in battery-powered systems |
| Fixed 5V output | Integrated 12.5MΩ feedback network eliminates external resistor errors and saves board space |
| Low EMI Silent Switcher® design | Controlled SW node edges and symmetrical layout minimize radiated emissions for automotive EMC compliance |
| Robust protection suite | Includes thermal shutdown, input UVLO, output overvoltage clamp, and current-limit foldback |
Applications
| Automotive Infotainment Power | GSM Base Station RF Module Supply |
|---|---|
Use Scenario: Powering display controllers, audio codecs, and USB hubs in head units with strict standby current limits. IC Role / Device Role / Timing Role: Primary 5V buck converter delivering stable rail under cold-crank (5.5VIN) and load-dump (42VIN) conditions. Use Value: 2.5µA quiescent current extends vehicle battery life during extended parking; AEC-Q100 ensures reliability over 15-year service life. | Use Scenario: Generating clean 5V supply for LTE/5G RF front-end ICs requiring low noise and fast transient response. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator with <10mVP-P ripple and 50µs recovery from 1.5A→3.5A load steps. Use Value: Fixed 5V output eliminates feedback resistor drift; 30ns min on-time supports 2MHz switching for compact filter design. |
| Industrial PLC I/O Module | Medical Portable Diagnostic Device |
Use Scenario: Providing isolated 5V rail for digital I/O conditioning circuits in harsh factory environments. IC Role / Device Role / Timing Role: Main DC/DC stage converting wide-range 12–42V industrial bus to regulated 5V for microcontrollers and sensors. Use Value: 42V absolute max rating withstands inductive kickback; PG flag enables system-level power sequencing and fault logging. | Use Scenario: Battery-powered ultrasound or glucose monitor requiring long runtime and zero-maintenance operation. IC Role / Device Role / Timing Role: Primary power converter enabling multi-year operation on single Li-ion cell (via 12VIN boost stage) or primary alkaline cells. Use Value: 2.5µA IQ preserves battery capacity; BIAS pin connection to VOUT reduces heat generation in sealed enclosures. |
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 |
|---|---|---|---|
| LT8610ABEMSE-5#PBF | Higher light-load efficiency (91% vs 82% at 1mA, 12VIN→5VOUT) but increased output ripple in Burst Mode | Better suited for ultra-low-power always-on nodes where ripple can be filtered; less ideal for noise-sensitive analog circuits | Select LT8610ABEMSE-5#PBF when maximizing battery life is critical and output capacitance can be increased to suppress ripple |
| LM61480RQRJRRQ1 | 42V, 8A rated; 15µA IQ; no integrated BIAS option; different pinout and package (16-pin QFN) | Higher current capability for future-proofing; lacks BIAS-driven efficiency optimization at light loads | Choose LM61480RQRJRRQ1 only when >3.5A output or different thermal profile (QFN vs MSOP) is required |
Compared with LT8610ABEMSE-5#PBF, the LT8610AEMSE-5#PBF offers lower output ripple and faster light-load transient response, while the LM61480RQRJRRQ1 provides higher current headroom but sacrifices ultralow IQ and BIAS-based efficiency tuning.
Availability
LT8610AEMSE-5#PBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC I/O modules, and portable medical diagnostics requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LT8610AEMSE-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 precision instrumentation, communications, and automotive markets.
The LT8610A/LT8610AB series was designed specifically for automotive and industrial applications demanding ultralow quiescent current, wide input range, and AEC-Q100 reliability-enabling always-on functionality in safety-critical systems.
FAQ
What is the guaranteed output voltage accuracy of the LT8610AEMSE-5#PBF over temperature?
The LT8610AEMSE-5#PBF guarantees 5.00V ±0.6% over the full –40°C to 125°C junction temperature range, based on internal 12.5MΩ feedback divider trimming and 0.970V reference stability. This accuracy eliminates need for external calibration in automotive and industrial applications where supply rail tolerance directly impacts ADC reference or sensor biasing.
Can the LT8610AEMSE-5#PBF operate with input voltage below 3.4V?
No-the LT8610AEMSE-5#PBF has a minimum input voltage of 3.4V per Absolute Maximum Ratings and Electrical Characteristics tables. Attempting operation below this threshold may result in undefined regulation, failure to start, or violation of AEC-Q100 stress limits. For sub-3.4V inputs, consider a different topology such as an LDO or buck-boost converter.
How does the BIAS pin improve efficiency in the LT8610AEMSE-5#PBF?
The BIAS pin on the LT8610AEMSE-5#PBF allows internal circuitry to draw current from the 5V output instead of VIN when biased above 3.1V. This reduces VIN current by up to 9mA at 1A load (per datasheet Fig. G29/G30), lowering power loss in high-input-voltage scenarios (e.g., 24VIN→5VOUT) and improving overall system efficiency by 0.5–1.2% depending on operating point.
Is the LT8610AEMSE-5#PBF pin-compatible with the LT8610AEMSE-3.3#PBF?
Yes-the LT8610AEMSE-5#PBF and LT8610AEMSE-3.3#PBF share identical 16-lead MSOP packaging, pinout, and electrical interface. Only the internal feedback divider differs (12.5MΩ for 5V vs 14.3MΩ for 3.3V), so PCB layout and peripheral components (inductor, capacitors, BST cap) are fully interchangeable between these variants.
What thermal derating applies to the LT8610AEMSE-5#PBF at 125°C junction temperature?
At 125°C junction temperature, the LT8610AEMSE-5#PBF maintains full 3.5A output current capability per datasheet specifications, as its –40°C to 125°C grade (E suffix) is guaranteed across this range. However, sustained operation above 125°C reduces lifetime; the device includes thermal shutdown that activates above 150°C to prevent permanent damage.
LT8610AEMSE-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
LT8610AEMSE-5#PBF FAQ
1.How can I place an order for LT8610AEMSE-5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610AEMSE-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 LT8610AEMSE-5#PBF reliable?
The price and inventory of LT8610AEMSE-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 LT8610AEMSE-5#PBF is usually 5 days.
3.What payment methods are accepted for LT8610AEMSE-5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610AEMSE-5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610AEMSE-5#PBF?
LT8610AEMSE-5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610AEMSE-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 LT8610AEMSE-5#PBF?
For technical support, including LT8610AEMSE-5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610AEMSE-5#PBF requirements.
6.How does Aetrix verify that LT8610AEMSE-5#PBF is sourced from the original manufacturer or authorized distributors?
All LT8610AEMSE-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 LT8610AEMSE-5#PBF meets industry standards.
7.What is the process for return or replacement of LT8610AEMSE-5#PBF?
All LT8610AEMSE-5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610AEMSE-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 LT8610AEMSE-5#PBF part is unused and in its original packaging.
Return procedure for LT8610AEMSE-5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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