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Analog Devices Inc. LT8610AIMSE-5#TRPBF
- Part No.:
- LT8610AIMSE-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610AIMSE-5#TRPBF.pdf
- Description:
- IC REG BUCK 5V 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,157
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Product details
Overview
LT8610AIMSE-5#TRPBF from Analog Devices is a 42V input, 5V fixed-output synchronous step-down regulator delivering up to 3.5A continuous output current with 2.5µA quiescent current in Burst Mode® operation. It features a 30ns minimum on-time, adjustable switching frequency (200kHz–2.2MHz), and integrated power MOSFETs in a thermally enhanced 16-lead MSOP package. It is AEC-Q100 qualified and used in automotive infotainment power supplies requiring ultra-low IQ and high efficiency at light loads.
For engineers reviewing the LT8610AIMSE-5#TRPBF datasheet, LT8610AIMSE-5#TRPBF pinout, LT8610AIMSE-5#TRPBF application, or LT8610AIMSE-5#TRPBF equivalent, key selection criteria include its 5V fixed output, 3.5A capability, 30ns min-on-time for high VIN/VOUT ratios, ultralow 2.5µA IQ regulation, and AEC-Q100 qualification for automotive environments.
Technical Context
The LT8610AIMSE-5#TRPBF employs constant-frequency current-mode control with internal 0.97V reference and integrated top/bottom NMOS switches (120mΩ/65mΩ typical RDS(on)). Its oscillator supports RT-programmed frequency and foldback during start-up or overcurrent, while SYNC pin enables external clock synchronization or pulse-skipping mode.
Burst Mode® operation shuts down control circuitry between switching bursts to achieve 2.5µA IQ; EN/UV pin provides accurate 1.0V threshold for input undervoltage lockout, and PG flag signals ±9% VOUT regulation status and fault conditions. The BIAS pin allows sourcing INTVCC from VOUT to reduce VIN current when VOUT ≥ 3.3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.4V to 42V - supports wide automotive battery transients including cold-crank (≥4.5V) and load-dump (≤42V). |
| Output Voltage | Fixed 5.00V ±1.5% - internally trimmed; eliminates external feedback resistors and reduces BOM count. |
| Max Output Current | 3.5A continuous - enables single-chip 5V supply for multi-rail systems (e.g., MCU + CAN + display drivers). |
| Quiescent Current | 2.5µA at 12VIN → 5VOUT - sustains >1-year battery life in always-on automotive modules. |
| Min On-Time | 30ns - enables 12V→5V conversion at 2.2MHz, reducing inductor size and improving transient response. |
| Switching Frequency | 200kHz to 2.2MHz (RT-programmable) - allows EMI optimization and avoids AM band; foldback protects during start-up. |
| Thermal Rating | –40°C to +125°C junction - validated for under-hood automotive applications per AEC-Q100 Grade I. |
Pinout & Package
Package: 16-lead plastic MSOP with exposed thermal pad (Pin 17 = GND). θJA = 40°C/W; requires soldering of exposed pad to PCB for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock interface | Enables synchronization to external clock or forces pulse-skipping mode when tied high; must not be floated. |
| TR/SS (2) | Soft-start & tracking control | Programs output ramp rate via capacitor; enables voltage tracking of another rail during startup. |
| RT (3) | Frequency programming | Resistor-to-GND sets switching frequency; determines loop bandwidth and EMI profile. |
| EN/UV (4) | Enable & UVLO input | 1.0V rising threshold enables regulator; hysteresis prevents chatter during brown-out. |
| VIN (5,6) | Main power input | Supplies internal circuitry and top switch; requires local 1µF ceramic bypass close to pins. |
| NC (7) | No connect | Not bonded; must remain unconnected on PCB. |
| GND (8) | Power ground return | Return path for bottom switch; must be tied to exposed pad (Pin 17) for thermal and electrical integrity. |
| VOUT (16) | Regulated 5V output | Fixed 5V output node; connects internally to 12.5MΩ feedback divider - no external resistors needed. |
| SW (9,10,11) | Switch node | Drives external inductor; high di/dt node requiring minimal PCB area and tight layout. |
| BST (12) | Bootstrap supply | Requires 0.1µF ceramic capacitor to SW for top switch gate drive; critical for high-side NMOS conduction. |
| INTVCC (13) | Internal 3.4V regulator output | Bypassed with ≥1µF ceramic; powers internal logic; sourced from BIAS if VBIAS > 3.1V. |
| BIAS (14) | Efficiency-boost bias input | Tie to VOUT (5V) to reduce VIN current draw and improve light-load efficiency. |
| PG (15) | Power good flag | Open-drain output asserts high when VOUT is within ±9% of 5V and no faults exist. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Validated for automotive Grade I (–40°C to +125°C), enabling use in infotainment, ADAS sensors, and body control modules. |
| Ultralow 2.5µA Quiescent Current | Extends battery runtime in always-on systems (e.g., telematics, alarm controllers) without compromising regulation accuracy. |
| 30ns Minimum On-Time | Supports high-frequency, high-step-down ratio designs (e.g., 24V→5V @ 2MHz), minimizing inductor volume and cost. |
| Integrated 5V Fixed Output | Eliminates external feedback network, improves accuracy (±1.5%), and reduces component count and layout sensitivity. |
| BIAS Pin Efficiency Optimization | When tied to VOUT, reduces VIN current draw by shifting INTVCC sourcing from VIN to VOUT, improving full-load efficiency by ~0.5%. |
| Robust Protection Suite | Includes overtemperature shutdown, current-limit foldback, PG fault signaling, and precise EN/UV threshold for reliable system-level sequencing. |
Applications
| Automotive Infotainment Power Supply | GSM Base Station RF Power Amplifier Bias |
|---|---|
Use Scenario: Powering head-unit SoC, display driver, and audio codec from 12V vehicle battery with strict low-IQ requirements. IC Role / Device Role / Timing Role: Primary 5V buck converter providing stable, low-noise, always-on supply with fast transient response to bursty SoC loads. Use Value: 2.5µA IQ extends battery backup time beyond 12 months; 30ns min-on-time ensures clean 5V rail even during cold-crank (6.5V min VIN). | Use Scenario: Generating 5V bias for GaAs/GaN RF power amplifiers in 2G/3G base stations where standby power must be minimized. IC Role / Device Role / Timing Role: High-efficiency, low-ripple DC-DC stage converting 24V/48V telecom supply to regulated 5V PA bias rail. Use Value: 95% peak efficiency at 1A reduces thermal stress; programmable frequency avoids sensitive RF bands; ±9% PG flag enables remote health monitoring. |
| Industrial IoT Sensor Node | Medical Portable Diagnostic Device |
Use Scenario: Powering ultra-low-power microcontroller, BLE radio, and analog front-end from primary Li-ion battery in wireless sensor nodes. IC Role / Device Role / Timing Role: Main system regulator delivering 5V to USB peripherals and level-shifters while maintaining µA-level sleep current. Use Value: 2.5µA IQ enables >5-year battery life; fixed 5V output simplifies design and improves long-term stability vs. resistor-based feedback. | Use Scenario: Providing isolated 5V auxiliary supply for LCD backlight, touch controller, and data acquisition circuits in handheld ultrasound units. IC Role / Device Role / Timing Role: Compact, thermally efficient 5V source operating from 7.4V Li-Poly pack with stringent EMI limits for medical EMC compliance. Use Value: MSOP package with exposed pad meets space constraints; 42V max VIN accommodates charger overvoltage; low EMI Burst Mode reduces radiated emissions. |
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 |
|---|---|---|---|
| LT8610ABIMSE-5#TRPBF | Same package and pinout; improved light-load efficiency (91% vs. 82% at 1mA) but higher output ripple in Burst Mode. | Better suited for battery-powered systems prioritizing runtime over ripple-sensitive analog rails. | Select LT8610ABIMSE-5#TRPBF when maximizing light-load efficiency is critical and additional output capacitance can be added to suppress ripple. |
| LM61480RQRVCR | 5V fixed, 4.5A output, 15µA IQ, 3.5V–36V input; no AEC-Q100 rating; different pinout and package (16-pin WQFN). | Targeted at industrial/commercial applications where automotive qualification is not required. | Choose LM61480RQRVCR for cost-sensitive non-automotive designs needing higher current and simpler layout, but verify thermal performance without AEC-Q100 validation. |
Compared with LT8610ABIMSE-5#TRPBF, the LT8610AIMSE-5#TRPBF offers lower output ripple and tighter regulation at light loads, while the LM61480RQRVCR provides higher current and wider commercial temp range but lacks automotive qualification and has higher IQ - making LT8610AIMSE-5#TRPBF optimal for AEC-Q100-compliant 5V/3.5A systems demanding ultralow IQ.
Availability
LT8610AIMSE-5#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial IoT sensor nodes, and portable medical diagnostic devices requiring stable component supply, AEC-Q100 qualification, and ultralow quiescent current performance.
Supply support for LT8610AIMSE-5#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and automotive markets.
The LT8610A series was designed specifically for automotive and industrial applications demanding high efficiency across wide load ranges, ultralow IQ for battery longevity, and robust operation under harsh voltage transients - with the LT8610AIMSE-5#TRPBF targeting 5V fixed-output implementations.
FAQ
What is the maximum input voltage rating for the LT8610AIMSE-5#TRPBF?
The LT8610AIMSE-5#TRPBF has an absolute maximum input voltage rating of 42V on the VIN pins. This allows safe operation during automotive load-dump events and supports wide-input industrial power rails. Continuous operation above 42V may cause permanent damage; design margin should maintain VIN ≤ 40V under worst-case transients.
Does the LT8610AIMSE-5#TRPBF require external feedback resistors to set the 5V output?
No, the LT8610AIMSE-5#TRPBF does not require external feedback resistors. It integrates a precision 12.5MΩ internal resistor divider that fixes the output to 5.00V ±1.5%, eliminating external components, reducing BOM cost, and improving long-term output voltage stability versus resistor-based solutions.
How does the BIAS pin improve efficiency in the LT8610AIMSE-5#TRPBF?
The BIAS pin on the LT8610AIMSE-5#TRPBF allows sourcing the internal 3.4V regulator (INTVCC) from the 5V output instead of VIN when VBIAS ≥ 3.1V. Tying BIAS directly to VOUT reduces VIN current draw, improving full-load efficiency by ~0.5% and lowering thermal dissipation in high-current applications.
Is the LT8610AIMSE-5#TRPBF pin-compatible with the LT8610ABIMSE-5#TRPBF?
Yes, the LT8610AIMSE-5#TRPBF is pin-compatible and footprint-compatible with the LT8610ABIMSE-5#TRPBF. Both share identical 16-lead MSOP packaging, pinout, and electrical interface. However, the LT8610ABIMSE-5#TRPBF delivers higher light-load efficiency (91% vs. 82% at 1mA) at the cost of increased output ripple in Burst Mode.
What thermal considerations apply to the LT8610AIMSE-5#TRPBF in automotive applications?
The LT8610AIMSE-5#TRPBF is rated for –40°C to +125°C junction temperature and is AEC-Q100 Grade I qualified. Its 16-lead MSOP package includes an exposed thermal pad (Pin 17) that must be soldered to a PCB copper pour to achieve θJA = 40°C/W. For under-hood use, ensure ≥2 cm² of 2-oz copper connected to the pad and avoid thermal isolation.
LT8610AIMSE-5#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:
- 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
LT8610AIMSE-5#TRPBF FAQ
1.How can I place an order for LT8610AIMSE-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610AIMSE-5#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 LT8610AIMSE-5#TRPBF reliable?
The price and inventory of LT8610AIMSE-5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8610AIMSE-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610AIMSE-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610AIMSE-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610AIMSE-5#TRPBF?
LT8610AIMSE-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610AIMSE-5#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 LT8610AIMSE-5#TRPBF?
For technical support, including LT8610AIMSE-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610AIMSE-5#TRPBF requirements.
6.How does Aetrix verify that LT8610AIMSE-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610AIMSE-5#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 LT8610AIMSE-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610AIMSE-5#TRPBF?
All LT8610AIMSE-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610AIMSE-5#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 LT8610AIMSE-5#TRPBF part is unused and in its original packaging.
Return procedure for LT8610AIMSE-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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