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Analog Devices Inc. LT8610EMSE#PBF
- Part No.:
- LT8610EMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610EMSE#PBF.pdf
- Description:
- IC REG BUCK ADJ 2.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,412
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Product details
Overview
LT8610EMSE#PBF from Analog Devices (formerly Linear Technology) is a 42V input, 2.5A synchronous step-down regulator with peak-current-mode control, 2.5µA quiescent current in Burst Mode®, and internal compensation. It delivers regulated 3.3V or 5V outputs in automotive and industrial power supplies where ultra-low standby power and high efficiency across wide load ranges are critical.
For engineers reviewing the LT8610EMSE#PBF datasheet, LT8610EMSE#PBF pinout, LT8610EMSE#PBF application, or LT8610EMSE#PBF equivalent, key selection criteria include its 50ns minimum on-time, ±9% power-good accuracy, 200kHz–2.2MHz programmable switching frequency via RT resistor, and thermally enhanced 16-lead MSOP package with exposed GND pad.
Technical Context
The LT8610EMSE#PBF implements constant-frequency peak-current-mode control with internal 0.970V reference and slope compensation. Its oscillator supports external synchronization (SYNC pin) or Burst Mode® operation for sub-µA light-load IQ, while frequency foldback protects during start-up and overcurrent events.
It integrates top and bottom N-channel MOSFETs (120mΩ/65mΩ RDS(ON)), BST boost circuitry, and a 3.4V INTVCC regulator powered optionally from BIAS pin when VBIAS > 3.1V-enabling higher efficiency at 3.3V+ outputs by reducing VIN supply current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.4V to 42V - supports 12V/24V automotive rails and industrial 36V systems without pre-regulation. |
| Output Current | 2.5A continuous - enables single-chip 5V/2.5A or 3.3V/2.5A conversion for microcontrollers and sensors. |
| Quiescent Current | 2.5µA at no load (12VIN→3.3VOUT) - extends battery life in always-on telematics and ECU modules. |
| Switching Frequency | 200kHz to 2.2MHz (RT-programmable) - allows trade-off between small magnetics (≥1MHz) and high efficiency (≤500kHz). |
| Min On-Time / Off-Time | 50ns / 80ns - supports high VIN/VOUT ratios (e.g., 36V→3.3V) without pulse-skipping instability. |
| Power-Good Accuracy | ±9% of FB voltage - provides reliable system reset signaling when VOUT reaches regulation within 100ms. |
| Enable Threshold | 1.00V rising (40mV hysteresis) - enables precise VIN undervoltage lockout using simple resistor divider. |
Pinout & Package
LT8610EMSE#PBF is housed in a thermally enhanced 16-lead plastic MSOP package (MSE) with exposed GND pad (Pin 17), θJA = 40°C/W, 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 input / mode select | Ground for low-ripple Burst Mode®; tie to INTVCC or logic high for pulse-skipping; accept 200kHz–2.2MHz external clock. |
| TR/SS (2) | Soft-start and tracking control | Capacitor-connected pin sets output ramp rate; <0.97V forces FB tracking; internal 2.2µA pull-up enables simple soft-start timing. |
| RT (3) | Frequency programming | Resistor-to-ground sets switching frequency per RT = 46.5/fSW – 5.2 (kΩ, fSW in MHz); enables EMI optimization. |
| EN/UV (4) | Enable and input UVLO input | 1.00V threshold with 40mV hysteresis; used to enable regulator or program VIN shutdown point (e.g., 6V UVLO). |
| VIN (5,6) | Main input power supply | Supplies IC bias and top switch; requires local 1µF ceramic bypass; pins must be shorted and routed with low-inductance path. |
| PGND (7,8) | Power ground return | Return path for bottom switch; must connect directly to input capacitor negative terminal and share low-impedance plane with VIN. |
| SW (9,10,11) | Switch node | Drives external inductor and BST capacitor; high di/dt node requiring minimized loop area and tight layout. |
| BST (12) | Bootstrap supply | Requires 0.1µF ceramic capacitor to SW; generates gate drive voltage >VIN for top N-MOSFET. |
| INTVCC (13) | Internal 3.4V regulator output | Bypass with ≥1µF ceramic; powers internal logic; draws current from BIAS if VBIAS > 3.1V, else from VIN. |
| BIAS (14) | Efficiency-boosting bias supply | Tie to VOUT for ≥3.3V outputs to reduce VIN current and improve full-load efficiency by ~1–2%. |
| PG (15) | Open-drain power-good flag | Pulled low until VFB is within ±9% of 0.970V; valid above 3.4V VIN; requires external pull-up resistor. |
| FB (16) | Feedback reference input | Regulated to 0.970V; connects to resistor divider from VOUT; add 4.7–10pF phase-lead cap for stability. |
| GND (17) | Exposed thermal pad | Must be soldered to PCB ground plane; primary thermal path and signal reference for PGND and analog circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode® | 2.5µA input current at no load preserves battery runtime in always-on automotive modules. |
| Programmable Switching Frequency | 200kHz–2.2MHz via single RT resistor enables EMI compliance and compact filter design. |
| Integrated Power Switches | 120mΩ top / 65mΩ bottom N-MOSFETs eliminate external FETs and gate drivers, reducing BOM count. |
| BIAS Pin Efficiency Boost | Routing VOUT to BIAS reduces VIN current draw, improving full-load efficiency by up to 2% at 3.3V/2.5A. |
| Robust Protection Suite | Includes thermal shutdown, frequency foldback during overcurrent/start-up, and ±9% PG fault detection. |
| Small Thermally Enhanced Package | 16-lead MSOP with exposed pad achieves θJC = 10°C/W - supports 2.5A continuous output without heatsink. |
Applications
| Automotive Infotainment Power | Industrial Sensor Node Supply |
|---|---|
|
Use Scenario: Powering 3.3V SoC, display interface, and CAN transceiver in head-unit under cold-crank (5.5VIN) and load-dump (42VIN) conditions. IC Role / Device Role / Timing Role: Primary 3.3V/2.5A buck regulator with Burst Mode® for low-IQ sleep states and fast transient response to burst data traffic. Use Value: Maintains regulation down to 5.5VIN with 200mV dropout, survives 42V transients, and draws only 2.5µA in parking mode. |
Use Scenario: Providing stable 5V rail to wireless sensor MCU, RF transceiver, and analog front-end in remote IIoT node powered by 24V DC bus. IC Role / Device Role / Timing Role: High-efficiency, wide-input buck converter with programmable 700kHz switching for optimal EMI filtering and low-noise analog performance. Use Value: Delivers 96% efficiency at 1A/5V from 12VIN, supports 24V input without derating, and enables >10-year battery life in sleep-wake cycles. |
| GSM Base Station Bias Supply | Medical Portable Diagnostic Device |
|
Use Scenario: Generating clean 5V supply for GSM PA driver stage and RF synthesizer in outdoor small-cell base station operating from 48V PoE-derived rail. IC Role / Device Role / Timing Role: Synchronous buck with low EMI and 50ns min-on-time to support 48V→5V conversion at 1MHz for compact magnetics. Use Value: Achieves <10mVP-P ripple in Burst Mode®, meets EN55022 Class B emissions, and sustains 2.5A output with minimal thermal rise. |
Use Scenario: Powering FPGA, ADC, and LCD backlight in handheld ultrasound device with Li-ion battery (3.0–4.2V) and 12V AC adapter input. IC Role / Device Role / Timing Role: Dual-input capable buck regulator using EN/UV for seamless battery/adapter switchover and TR/SS for controlled power-up sequencing. Use Value: Operates down to 3.4VIN, delivers 2.5A at 3.3V with 2.5µA quiescent current, and provides PG flag for safe FPGA configuration. |
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#PBF | Improved EMI performance via optimized switching edge rates and integrated spread-spectrum modulation; identical pinout and specs otherwise. | Better suited for radiated emissions-sensitive applications (e.g., medical, avionics) where LT8610EMSE#PBF may require additional filtering. | Select LT8610AEMSE#PBF when meeting CISPR 22/32 Class B without added ferrites is mandatory; otherwise LT8610EMSE#PBF remains cost-optimal. |
| MPQ4420AGL-AEC1-P | Automotive-grade (AEC-Q100 Grade 1), 36V max input, 2A output, 17µA IQ - lacks Burst Mode® and programmable frequency; fixed 500kHz. | Targeted at cost-sensitive automotive body electronics where 2A suffices and 2.5µA IQ is not required. | Choose MPQ4420AGL-AEC1-P only for AEC-Q100-compliant designs with ≤2A load and relaxed IQ requirements; not drop-in compatible due to different pinout and control features. |
Compared with LT8610AEMSE#PBF, the LT8610EMSE#PBF offers identical functionality at lower cost but requires external EMI mitigation in stringent environments; versus MPQ4420AGL-AEC1-P, it delivers 25% higher current, 7x lower IQ, and full frequency programmability-justifying its use in high-performance, battery-sensitive applications.
Availability
LT8610EMSE#PBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial sensor nodes, GSM base station bias supplies, and portable medical diagnostics requiring stable component supply with guaranteed long-term availability.
Supply support for LT8610EMSE#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 acquired Linear Technology in 2017 and maintains its legacy of high-performance power management ICs with rigorous automotive and industrial qualification.
The LT8610EMSE#PBF belongs to the LT86xx family of ultralow-IQ synchronous monolithic buck regulators, designed specifically for automotive and industrial applications demanding wide VIN range, high efficiency at light loads, and robust thermal performance.
FAQ
What is the maximum input voltage rating for the LT8610EMSE#PBF?
The LT8610EMSE#PBF has an absolute maximum input voltage rating of 42V on VIN, EN/UV, and PG pins. It operates continuously over 3.4V to 42V input range, making it suitable for 12V and 24V automotive systems including cold-crank and load-dump conditions. Exceeding 42V risks permanent damage.
How does the BIAS pin improve efficiency in the LT8610EMSE#PBF?
The BIAS pin on the LT8610EMSE#PBF allows the internal 3.4V regulator to draw current from VOUT instead of VIN when VBIAS > 3.1V. For 3.3V or 5V outputs, connecting BIAS to VOUT reduces VIN supply current by ~5–8mA at full load, improving full-load efficiency by up to 2% and lowering thermal stress on the LT8610EMSE#PBF.
Can the LT8610EMSE#PBF operate with an input voltage below 3.4V?
No-the LT8610EMSE#PBF has a minimum operating input voltage of 3.4V as specified in the Electrical Characteristics table. Below this, regulation cannot be maintained. The 2.9V value listed is a test condition limit, not operational; attempting to operate below 3.4V will cause output dropout or erratic behavior. For sub-3.4V inputs, consider the LT8613 or LT8640S.
What is the purpose of the TR/SS pin on the LT8610EMSE#PBF?
The TR/SS (Track/Soft-Start) pin on the LT8610EMSE#PBF controls output voltage ramp rate during startup and enables output voltage tracking. A capacitor on TR/SS sets soft-start time; applying an external voltage <0.97V forces FB to track that voltage, enabling precise power sequencing in multi-rail systems. During fault or shutdown, TR/SS is actively pulled low.
Does the LT8610EMSE#PBF require external compensation components?
No-the LT8610EMSE#PBF features fully internal compensation with peak-current-mode architecture. No external compensation network is needed, simplifying design and reducing BOM count. Stability is ensured across all operating conditions using the recommended input/output capacitors and inductor per the datasheet layout guidelines.
LT8610EMSE#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):
- 40V
- Current - Output:
- 2.5A
- 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
LT8610EMSE#PBF FAQ
1.How can I place an order for LT8610EMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610EMSE#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 LT8610EMSE#PBF reliable?
The price and inventory of LT8610EMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8610EMSE#PBF is usually 5 days.
3.What payment methods are accepted for LT8610EMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610EMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610EMSE#PBF?
LT8610EMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610EMSE#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 LT8610EMSE#PBF?
For technical support, including LT8610EMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610EMSE#PBF requirements.
6.How does Aetrix verify that LT8610EMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LT8610EMSE#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 LT8610EMSE#PBF meets industry standards.
7.What is the process for return or replacement of LT8610EMSE#PBF?
All LT8610EMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610EMSE#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 LT8610EMSE#PBF part is unused and in its original packaging.
Return procedure for LT8610EMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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