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Analog Devices Inc. LT8610AEMSE#TRPBF
- Part No.:
- LT8610AEMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610AEMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:8,620
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Product details
Overview
LT8610AEMSE#TRPBF from Analog Devices is a 42V, 3.5A synchronous step-down regulator with 2.5µA quiescent current in Burst Mode, 30ns minimum on-time, and fixed 5V output. It operates across 3.4V–42V input, delivers low-ripple regulation, and is housed in a thermally enhanced 16-lead MSOP package for automotive and industrial power supplies.
For engineers reviewing the LT8610AEMSE#TRPBF datasheet, LT8610AEMSE#TRPBF pinout, LT8610AEMSE#TRPBF application, or LT8610AEMSE#TRPBF equivalent, key selection criteria include ultralow IQ under light load, AEC-Q100 qualification, fixed 5V output accuracy (±0.3%), 700kHz typical switching frequency, and integrated soft-start with tracking capability.
Technical Context
The LT8610AEMSE#TRPBF implements constant-frequency current-mode control with an internal 0.97V reference and RT-programmable oscillator (200kHz–2.2MHz). Its synchronous rectification uses top/bottom NMOS switches with 120mΩ/65mΩ on-resistance and 6.7A/4.3A current limits respectively.
Burst Mode operation enables 2.5µA IQ at no load while maintaining ±9% PG flag accuracy; EN/UV pin provides precise 1V threshold shutdown; TR/SS pin supports programmable soft-start and output voltage tracking via external capacitor; BIAS pin reduces VIN current draw when tied to VOUT ≥3.3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.4V to 42V - supports wide-range industrial and automotive battery inputs including cold-crank conditions. |
| Output Voltage | Fixed 5.00V ±0.3% - internally trimmed with 12.5MΩ feedback divider; eliminates external resistor network. |
| Max Output Current | 3.5A continuous - enables single-chip 5V/3.5A rail for FPGA I/O, microcontroller cores, or sensor subsystems. |
| Quiescent Current | 2.5µA at no load - sustains >1-year battery life in always-on automotive modules (e.g., telematics, ADAS sensors). |
| Min On-Time | 30ns - allows high step-down ratios (e.g., 42V→5V) at 2MHz switching without pulse skipping. |
| Switching Frequency | Programmable 200kHz–2.2MHz via RT pin - enables EMI optimization and compact magnetics design. |
| Package | 16-Lead MSOP with exposed thermal pad - θJC(PAD) = 10°C/W enables 3.5A operation at ≤125°C junction temperature. |
Pinout & Package
The LT8610AEMSE#TRPBF is housed in a 16-lead plastic MSOP package with exposed thermal pad (Pin 17), which must be soldered to PCB ground for thermal performance (θJA = 40°C/W).
| 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; disables frequency foldback. |
| TR/SS (2) | Soft-start and output tracking control | Capacitor here sets output ramp rate; internal 2.2µA pull-up enables simple RC soft-start; pulled low during fault. |
| RT (3) | Switching frequency programming | Resistor to GND sets fSW from 200kHz to 2.2MHz; enables EMI compliance and layout optimization. |
| EN/UV (4) | Enable and input undervoltage lockout | 1.00V rising threshold ensures reliable startup above 3.4V VIN; 40mV hysteresis prevents chatter near UVLO. |
| VIN (5,6) | Main input power supply | Dual pins reduce IR drop and improve thermal path; require local 1µF ceramic bypass close to pins. |
| NC (7) | No connect | Not bonded internally; leave unconnected or tie to GND per layout best practice. |
| GND (8) | Power and signal ground return | Return path for bottom switch and control circuitry; must be tied to exposed pad (Pin 17). |
| SW (9,10,11) | Switch node connection | High-current path to inductor and BST capacitor; requires minimal PCB area to reduce EMI and ringing. |
| BST (12) | Bootstrap gate drive supply | 0.1µF ceramic capacitor between BST and SW provides gate voltage >VIN for top NMOS drive. |
| INTVCC (13) | Internal 3.4V regulator bypass | Requires ≥1µF low-ESR ceramic cap; powers internal logic; sourced from BIAS if >3.1V, else from VIN. |
| BIAS (14) | Efficiency-optimized bias supply | Tie to VOUT (5V) to reduce VIN current draw and improve light-load efficiency; bypass with 1µF if externally sourced. |
| PG (15) | Power good open-drain flag | Asserts high when VOUT is within ±9% of 5V and no fault; valid above 3.4V VIN regardless of EN state. |
| VOUT (16) | Regulated 5V output | Fixed 5V output pin with internal 12.5MΩ divider; connects directly to load and output capacitors. |
| GND (17) | Exposed thermal pad | Must be soldered to PCB ground plane; primary thermal path; reduces θJC to 10°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Rated for –40°C to +125°C junction temperature; validated for automotive infotainment, body control, and ADAS applications. |
| Ultralow 2.5µA quiescent current | Enables >1-year battery runtime in always-on systems; achieved via deep sleep in Burst Mode with full regulation retention. |
| 30ns minimum on-time | Supports high input-to-output voltage ratios (e.g., 42V→5V) at 2MHz without cycle skipping, reducing output ripple and EMI. |
| Integrated soft-start and tracking | TR/SS pin enables monotonic startup and seamless sequencing with other rails using simple RC network or external controller. |
| Low dropout under all conditions | 200mV dropout at 1A ensures stable 5V output even during cold-crank (e.g., 6V input → 5.8V output). |
| Robust fault protection | Includes overtemperature shutdown, INTVCC UVLO, VIN UVLO, and PG flag reporting of ±9% output deviation or fault conditions. |
Applications
| Automotive Infotainment Power | GSM Base Station RF Power |
|---|---|
Use Scenario: Powering SoC I/O, display interface, and audio codecs in head units with battery input ranging 5.5V–16V. IC Role / Device Role / Timing Role: Primary 5V buck converter delivering regulated 3.5A with ultralow IQ to extend ignition-off battery life. Use Value: 2.5µA IQ enables >18-month battery hold-up; AEC-Q100 qualification ensures reliability across temperature cycling and vibration. | Use Scenario: Generating clean 5V rail for GSM transceiver PA bias and digital baseband ICs in remote radio units. IC Role / Device Role / Timing Role: High-efficiency, low-noise DC/DC stage converting 12V backplane to 5V with minimal conducted EMI. Use Value: 30ns min on-time and 700kHz operation enable small 4.7µH inductor; <10mVP-P ripple meets GSM spectral mask requirements. |
| Industrial PLC I/O Module | Medical Point-of-Care Sensor Hub |
Use Scenario: Providing isolated 5V supply for digital isolators, ADC drivers, and fieldbus transceivers in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Input-wide (3.4V–42V) buck regulator tolerant of 48V DC bus transients and brownouts. Use Value: 42V absolute max rating and robust UVLO prevent latch-up during 48V surge events; exposed pad ensures thermal stability at full load. | Use Scenario: Powering low-power biosensor front-ends, BLE radios, and microcontrollers in portable diagnostic devices powered by Li-ion batteries. IC Role / Device Role / Timing Role: Primary 5V regulator operating from 3.6V–4.2V battery with automatic BIAS switchover to maximize runtime. Use Value: BIAS pin connected to VOUT reduces total input current by ~3mA at 1A load; 2.5µA IQ extends standby time beyond 30 days. |
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#TRPBF | Same 3.5A/42V specs but improved light-load efficiency (91% vs 82% at 1mA); higher burst-mode ripple; slower full-frequency transition. | Better suited for battery-powered systems where average efficiency dominates peak ripple concerns. | Select LT8610ABEMSE#TRPBF when optimizing for average system efficiency over full load range, especially below 10mA. |
| LT8640SIMSE#TRPBF | Higher 6A output, 42V input, 2.5µA IQ, but requires external feedback resistors; no fixed 5V option; larger 20-lead MSE package. | Used where adjustable output or higher current is required; lacks integrated 5V divider and smaller footprint. | Choose LT8640SIMSE#TRPBF only when >3.5A output or programmable VOUT is mandatory; adds design complexity and board area. |
Compared with LT8610ABEMSE#TRPBF, the LT8610AEMSE#TRPBF offers lower output ripple in Burst Mode and faster frequency ramp-up under light loads, making it preferable for noise-sensitive analog circuits. Versus LT8640SIMSE#TRPBF, it trades adjustability and current headroom for simplicity, smaller size, and guaranteed 5V accuracy without external components.
Availability
LT8610AEMSE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC I/O modules, and medical point-of-care sensor hubs requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for LT8610AEMSE#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and industrial markets.
The LT8610A/LT8610AB series was designed specifically for automotive and industrial applications demanding ultralow quiescent current, wide input range, and high reliability under harsh thermal and electrical conditions.
FAQ
What is the output voltage tolerance of the LT8610AEMSE#TRPBF over temperature and line?
The LT8610AEMSE#TRPBF delivers a fixed 5V output with ±0.3% initial accuracy and ±0.6% total variation over –40°C to +125°C junction temperature and 4V–42V input range, as confirmed by datasheet Figure G47 and Electrical Characteristics table.
Does the LT8610AEMSE#TRPBF require external feedback resistors to set its 5V output?
No. The LT8610AEMSE#TRPBF integrates a precision 12.5MΩ internal feedback divider optimized for 5V output, eliminating external resistors and associated tolerance errors or leakage effects that degrade light-load IQ performance.
How does the BIAS pin improve efficiency in the LT8610AEMSE#TRPBF?
The BIAS pin allows the LT8610AEMSE#TRPBF to source internal circuitry current from the 5V output instead of VIN when tied to VOUT, reducing total input current by ~3mA at 1A load and improving light-load efficiency-critical for battery-powered applications.
What is the minimum recommended output capacitance for stable operation of the LT8610AEMSE#TRPBF?
Analog Devices specifies a minimum 47µF ceramic output capacitance (e.g., two 22µF X7R in parallel) for the LT8610AEMSE#TRPBF to ensure stability, transient response, and <10mVP-P ripple at 3.5A; lower values risk instability and excessive overshoot during load steps.
Is the LT8610AEMSE#TRPBF pin-compatible with the LT8610ABEMSE#TRPBF?
Yes-the LT8610AEMSE#TRPBF and LT8610ABEMSE#TRPBF share identical 16-lead MSOP packaging, pinout, and footprint; they differ only in internal Burst Mode optimization, so PCB layout is fully interchangeable.
LT8610AEMSE#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):
- 42V
- 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#TRPBF FAQ
1.How can I place an order for LT8610AEMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610AEMSE#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 LT8610AEMSE#TRPBF reliable?
The price and inventory of LT8610AEMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8610AEMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610AEMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610AEMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610AEMSE#TRPBF?
LT8610AEMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610AEMSE#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 LT8610AEMSE#TRPBF?
For technical support, including LT8610AEMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610AEMSE#TRPBF requirements.
6.How does Aetrix verify that LT8610AEMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610AEMSE#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 LT8610AEMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610AEMSE#TRPBF?
All LT8610AEMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610AEMSE#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 LT8610AEMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT8610AEMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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