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Analog Devices Inc. LT8610IMSE#TRPBF
- Part No.:
- LT8610IMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610IMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 2.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,968
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Product details
Overview
LT8610IMSE#TRPBF from Analog Devices (formerly Linear Technology) is a 42V input, 2.5A synchronous step-down DC/DC regulator featuring 2.5µA quiescent current in Burst Mode®, 50ns minimum on-time, and internal compensation. It delivers regulated 3.3V or 5V output in automotive and industrial power supplies where ultra-low IQ and high efficiency at light loads are critical.
For engineers reviewing the LT8610IMSE#TRPBF datasheet, LT8610IMSE#TRPBF pinout, LT8610IMSE#TRPBF application, or LT8610IMSE#TRPBF equivalent, key selection criteria include its 3.4–42V input range, ±9% power-good accuracy, 700kHz typical switching frequency (RT-programmable from 200kHz to 2.2MHz), and thermally enhanced 16-lead MSOP package with exposed GND pad.
Technical Context
The LT8610IMSE#TRPBF employs peak-current-mode control with internal compensation, enabling fast transient response and stable operation with small inductors. Its architecture integrates top and bottom NMOS power switches (120mΩ/65mΩ RDS(ON)), BST charge pump, and 0.97V reference for precise feedback regulation.
Burst Mode® operation maintains <10mVP-P output ripple while achieving 2.5µA IQ at no load; synchronization via SYNC pin supports external clock alignment or pulse-skipping mode. EN/UV pin provides accurate 1.0V threshold with 40mV hysteresis for programmable undervoltage lockout or shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.4V to 42V - supports wide-range industrial and automotive battery inputs without pre-regulation. |
| Output Current | 2.5A continuous - enables single-chip 5V/2.5A or 3.3V/2.5A conversion for microcontroller or FPGA core rails. |
| Quiescent Current | 2.5µA at no load - extends battery life in always-on systems such as telematics or sensor nodes. |
| Switching Frequency | 200kHz to 2.2MHz (RT-programmable) - allows optimization of inductor size vs. efficiency across input/output conditions. |
| Feedback Reference | 0.970V ±0.006V - enables accurate output voltage setting with standard resistor dividers and low sensitivity to line/load variation. |
| Minimum On-Time | 50ns - supports high VIN/VOUT ratios (e.g., 36V→3.3V) without pulse skipping or frequency foldback. |
| Power-Good Accuracy | ±9% of VFB - ensures reliable system sequencing and fault detection during startup and overvoltage/undervoltage events. |
Pinout & Package
LT8610IMSE#TRPBF 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 optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock synchronization input | Enables Burst Mode (pin grounded), pulse-skipping (pin tied to INTVCC or logic high), or external clock alignment (200kHz–2.2MHz). |
| TR/SS (2) | Tracking and soft-start control | Programs output voltage ramp rate via capacitor; enables output tracking during power-up or sequencing with other rails. |
| RT (3) | Switching frequency programming | Resistor to GND sets oscillator frequency (200kHz–2.2MHz); determines inductor/capacitor sizing trade-offs. |
| EN/UV (4) | Enable and input undervoltage lockout | 1.0V rising threshold with 40mV hysteresis - allows precise VIN brownout protection or remote enable control. |
| VIN (5,6) | Main input power supply | Supplies internal circuitry and top switch; requires local high-frequency bypassing near pins to minimize noise and EMI. |
| PGND (7,8) | Power switch ground return | Low-impedance return path for bottom switch; must be connected directly to input capacitor negative terminal. |
| SW (9,10,11) | Switch node | Drives external inductor and BST capacitor; requires minimal PCB area to reduce EMI and switching losses. |
| BST (12) | Bootstrap supply for top switch gate drive | Requires 0.1µF ceramic capacitor between BST and SW to sustain high-side NMOS conduction. |
| INTVCC (13) | Internal 3.4V regulator bypass | Must be decoupled with ≥1µF low-ESR ceramic cap; powers internal logic and drivers; sourced from BIAS if VBIAS > 3.1V. |
| BIAS (14) | Efficiency-optimized bias supply | Tie to VOUT (≥3.3V) to reduce VIN current draw and improve full-load efficiency by ~1–2%. |
| PG (15) | Open-drain power-good flag | Asserts high when VOUT is within ±9% of target and no fault exists; valid above 3.4V VIN regardless of EN state. |
| FB (16) | Feedback input | Regulated to 0.970V; connects to resistor divider tap; phase-lead capacitor (4.7–10pF) recommended for stability. |
| GND (17) | Exposed thermal pad / signal ground | Must be soldered to PCB ground plane - primary thermal path and reference for all internal circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 2.5µA in Burst Mode® regulation - enables multi-year battery operation in IoT sensors and automotive standby systems. |
| Low-ripple Burst Mode® | <10mVP-P output ripple at light loads - eliminates need for post-regulation LDOs in noise-sensitive analog or RF subsystems. |
| Fast minimum on-time | 50ns - supports high step-down ratios (e.g., 42V→3.3V) without frequency foldback or duty-cycle limitation. |
| Integrated power switches | 120mΩ top / 65mΩ bottom NMOS - reduces external component count and PCB footprint versus controller + discrete FET solutions. |
| Thermally optimized package | 16-lead MSOP with exposed GND pad (θJC = 10°C/W) - sustains 2.5A output at ambient up to 85°C without heatsink. |
| Robust protection suite | Overcurrent (top/bottom), overtemperature, and PG fault signaling - enables self-protected operation in harsh environments. |
Applications
| Automotive Infotainment Power | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powering 3.3V microcontroller, CAN transceiver, and display interface in head unit under cold-crank (6V) and load-dump (42V) conditions. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 2.5A with ultralow IQ to meet ISO 16750-2 quiescent current requirements. Use Value: Maintains regulation down to 3.4V input and survives 42V transients without external TVS; 2.5µA IQ prevents battery drain during vehicle sleep mode. |
Use Scenario: Generating 5V rail for isolated digital I/O and fieldbus communication in DIN-rail mounted programmable logic controller. IC Role / Device Role / Timing Role: Compact, high-efficiency DC/DC converter replacing larger discrete solutions in space-constrained industrial enclosures. Use Value: 700kHz switching enables use of 4.7µH inductor; exposed pad ensures thermal reliability at 65°C ambient with no airflow. |
| GSM Base Station RF Power Amplifier Bias | Medical Portable Diagnostic Device |
Use Scenario: Providing clean, low-noise 5V bias supply to GaAs RF power amplifier stages in cellular infrastructure equipment. IC Role / Device Role / Timing Role: Low-EMI synchronous buck regulator operating in Burst Mode® during idle periods to minimize spectral noise near transmit bands. Use Value: <10mVP-P ripple and integrated MOSFETs eliminate external gate drivers and reduce conducted EMI; SYNC pin enables clock dithering for further noise spreading. |
Use Scenario: Powering ARM Cortex-M7 processor, ADC, and wireless BLE module in handheld ultrasound or glucose monitor with coin-cell or Li-ion battery. IC Role / Device Role / Timing Role: Primary step-down regulator supporting wide-input battery voltage (3.0–4.2V) and maintaining ultra-low IQ during sensor sampling intervals. Use Value: 2.5µA no-load current extends battery runtime; TR/SS pin enables controlled power-up sequencing with analog front-end before digital core activation. |
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 |
|---|---|---|---|
| LT8610EMSE#TRPBF | Same silicon, rated for –40°C to 125°C junction temperature (E-grade); LT8610IMSE#TRPBF is I-grade with identical specs but qualified for industrial temp range. | No functional difference; E-grade used in commercial/automotive; I-grade preferred for extended industrial environments with tighter qualification traceability. | Select LT8610IMSE#TRPBF when full industrial temperature validation and AEC-Q200-aligned process controls are required. |
| LT8610HMSE#TRPBF | Same silicon, rated for –40°C to 150°C junction temperature (H-grade); higher thermal stress screening and longer lifetime assurance at elevated temperatures. | Required for under-hood automotive or high-ambient industrial applications where junction exceeds 125°C; otherwise electrically identical. | Choose LT8610HMSE#TRPBF only when sustained operation above 125°C junction is mandated; adds cost without benefit at lower temps. |
Compared with LT8610EMSE#TRPBF and LT8610HMSE#TRPBF, the LT8610IMSE#TRPBF offers identical electrical performance and pinout but is specifically qualified for industrial temperature operation - making it the optimal choice for applications requiring guaranteed performance from –40°C to 125°C without H-grade cost premium.
Availability
LT8610IMSE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLCs, medical diagnostics, and GSM RF power supplies requiring stable component supply, long-term lifecycle support, and guaranteed industrial-temperature operation.
Supply support for LT8610IMSE#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 acquired Linear Technology in 2017 and maintains its legacy high-performance power management portfolio with rigorous qualification and long-term product support.
The LT8610IMSE#TRPBF belongs to the LT86xx family of ultralow-IQ synchronous monolithic regulators, designed specifically for automotive, industrial, and battery-powered systems demanding high efficiency across full load range and robust operation under extreme input conditions.
FAQ
What is the maximum input voltage rating for the LT8610IMSE#TRPBF?
The LT8610IMSE#TRPBF has an absolute maximum input voltage rating of 42V on the VIN and EN/UV pins. It operates continuously over 3.4V to 42V input range, making it suitable for 24V industrial systems and 12V/24V automotive applications including cold-crank and load-dump conditions. Exceeding 42V may cause permanent damage.
How does the LT8610IMSE#TRPBF achieve 2.5µA quiescent current?
The LT8610IMSE#TRPBF achieves 2.5µA quiescent current through optimized Burst Mode® operation: during light loads, it delivers short energy bursts to the output capacitor followed by deep-sleep cycles where most internal circuitry is powered down. This design minimizes average input current while maintaining <10mVP-P output ripple - verified in typical 12V-to-3.3V applications.
Can the LT8610IMSE#TRPBF be synchronized to an external clock?
Yes, the LT8610IMSE#TRPBF supports external clock synchronization via the SYNC pin (Pin 1). When driven with a TTL/CMOS clock signal between 200kHz and 2.2MHz, the device aligns its switching edges to the external source and operates in pulse-skipping mode. This capability reduces EMI by enabling spread-spectrum clocking or synchronization with system clocks.
What is the purpose of the BIAS pin on the LT8610IMSE#TRPBF?
The BIAS pin (Pin 14) on the LT8610IMSE#TRPBF allows the internal regulator to draw bias current from the output rail instead of VIN when VBIAS ≥ 3.1V. For outputs ≥3.3V, connecting BIAS to VOUT improves full-load efficiency by ~1–2% and reduces thermal stress on the VIN path - a key advantage in high-current, high-input-voltage applications.
Does the LT8610IMSE#TRPBF require external compensation components?
No, the LT8610IMSE#TRPBF features fully internal compensation using peak-current-mode control. No external compensation network is needed - simplifying design, reducing BOM count, and ensuring stable operation with standard inductor and capacitor selections across its full operating range.
LT8610IMSE#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):
- 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
LT8610IMSE#TRPBF FAQ
1.How can I place an order for LT8610IMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610IMSE#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 LT8610IMSE#TRPBF reliable?
The price and inventory of LT8610IMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8610IMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610IMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610IMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610IMSE#TRPBF?
LT8610IMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610IMSE#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 LT8610IMSE#TRPBF?
For technical support, including LT8610IMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610IMSE#TRPBF requirements.
6.How does Aetrix verify that LT8610IMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610IMSE#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 LT8610IMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610IMSE#TRPBF?
All LT8610IMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610IMSE#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 LT8610IMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT8610IMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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