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Analog Devices Inc. LT8610ABIMSE-5#TRPBF
- Part No.:
- LT8610ABIMSE-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610ABIMSE-5#TRPBF.pdf
- Description:
- IC REG BUCK 5V 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,265
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Product details
Overview
LT8610ABIMSE-5#TRPBF 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 delivers 91% light-load efficiency in Burst Mode and supports synchronization, soft-start, and power-good signaling in a thermally enhanced 16-lead MSOP package.
For engineers reviewing the LT8610ABIMSE-5#TRPBF datasheet, LT8610ABIMSE-5#TRPBF pinout, LT8610ABIMSE-5#TRPBF application, or LT8610ABIMSE-5#TRPBF equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, automotive-grade thermal and EMI performance data, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The LT8610ABIMSE-5#TRPBF uses constant-frequency current-mode control with an internal 0.97V reference and RT-programmable oscillator (200kHz–2.2MHz). Its synchronous dual-NMOS architecture features 120mΩ top-side and 65mΩ bottom-side switch RDS(on), enabling high efficiency across load range.
Burst Mode operation reduces quiescent current to 2.5µA at no load while maintaining regulation; the LT8610AB variant improves light-load efficiency over LT8610A via higher Burst Mode current limit (1A vs 400mA), at the cost of increased output ripple-mitigated by ≥47µF output capacitance per datasheet guidance.
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/3.5A rail for infotainment, ADAS sensors, or gateway ECUs. |
| Quiescent Current | 2.5µA at no load - sustains >1-year battery life in always-on automotive modules (e.g., telematics wake-up circuits). |
| Min On-Time | 30ns - allows high VIN-to-VOUT step-down (e.g., 36V→5V @ 700kHz) without pulse-skipping instability. |
| Efficiency (Light Load) | 91% at 1mA, 12VIN→5VOUT - exceeds LT8610A (82%) due to optimized Burst Mode architecture. |
| Thermal Rating | –40°C to +125°C junction - qualified per AEC-Q100 Grade I, suitable for under-hood and cabin applications. |
| EMI Performance | Improved vs LT8610A - achieved via optimized switching edge rates and integrated spread-spectrum capability (SYNC pin). |
Pinout & Package
Package: 16-lead plastic MSOP with exposed thermal pad (Pin 17 = GND); θJA = 40°C/W, θJC(PAD) = 10°C/W. Exposed pad must be soldered to PCB for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock input | Enables synchronization to external clock or forces pulse-skipping mode when tied high; grounding enables low-ripple Burst Mode. |
| TR/SS (2) | Soft-start/tracking control | Capacitor-programmable voltage ramp rate; also enables output tracking during sequencing with other rails. |
| RT (3) | Frequency programming | Resistor-to-ground sets switching frequency from 200kHz to 2.2MHz; critical for EMI compliance and inductor size selection. |
| EN/UV (4) | Enable/undervoltage lockout | 1.00V rising threshold enables precise input brown-out protection; hysteresis prevents chatter near threshold. |
| VIN (5,6) | Main power input | Dual pins reduce IR drop and improve thermal path; require local 1µF ceramic bypass close to pins. |
| NC (7) | No connect | Not bonded internally; must remain unconnected to avoid parasitic coupling. |
| GND (8) | Power ground | Return path for bottom switch; must be tied to exposed pad (Pin 17) with low-inductance copper pour. |
| SW (9,10,11) | Switch node | High-current connection to inductor and BST capacitor; requires minimal PCB area to suppress EMI. |
| BST (12) | Bootstrap supply | Drives top NMOS gate; requires 0.1µF ceramic capacitor placed directly between BST and SW. |
| INTVCC (13) | Internal 3.4V regulator | Bypassed with ≥1µF ceramic; powers control circuitry; sourcing shifts to BIAS if VBIAS > 3.1V. |
| BIAS (14) | Efficiency-boosting bias supply | When tied to VOUT (5V), reduces VIN current draw and improves full-load efficiency by ~1–2%. |
| PG (15) | Power-good flag | Open-drain output asserts high when VOUT is within ±9% of 5V and no fault exists; valid above 3.4V VIN. |
| VOUT (16) | Regulated 5V output | Fixed-output pin with internal 12.5MΩ feedback divider; connects directly to load and output capacitors. |
| GND (17) | Exposed thermal pad | Electrically and thermally connected to die substrate; mandatory soldering required for thermal performance and reliability. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade I qualification | Validated for automotive use across –40°C to +125°C junction temperature, supporting under-hood and safety-critical systems. |
| Ultralow 2.5µA quiescent current | Enables >1-year battery standby in always-on vehicle modules without compromising regulation accuracy or startup time. |
| 30ns minimum on-time | Permits high step-down ratios (e.g., 36V→5V) at high frequencies (≥700kHz), reducing inductor size and improving transient response. |
| Integrated 5V fixed output | Eliminates external feedback network, saving board space and component cost while improving long-term output stability. |
| Synchronous rectification | Reduces conduction losses versus diode-based designs; achieves 95% peak efficiency at 1A, 12VIN→5VOUT. |
| Programmable soft-start & tracking | Prevents inrush current and enables controlled power sequencing with other rails using a single external capacitor on TR/SS. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powers display controllers, audio DSPs, and USB hubs in head units requiring stable 5V at up to 3.5A with low EMI. IC Role / Device Role / Timing Role: Primary 5V buck converter delivering regulated power; PG signal sequences downstream LDOs and processors. Use Value: 91% light-load efficiency extends battery runtime during vehicle sleep mode; AEC-Q100 ensures reliability over 15-year vehicle lifetime. | Use Scenario: Supplies image sensor, ISP, and serializer in rear-view or surround-view cameras operating in extreme ambient temperatures. IC Role / Device Role / Timing Role: Main 5V rail generator with thermal shutdown and undervoltage lockout; TR/SS enables synchronized startup with sensor reset. Use Value: 30ns min on-time supports direct 12V/24V battery input without pre-regulation; –40°C to +125°C rating covers full automotive thermal envelope. |
| Telematics Control Unit (TCU) | Industrial Gateway Controller |
Use Scenario: Provides 5V power to cellular modem, GNSS receiver, and microcontroller in always-connected vehicle communication modules. IC Role / Device Role / Timing Role: High-efficiency primary DC/DC with EN/UV monitoring battery voltage; SYNC pin aligns switching to reduce conducted EMI in RF-sensitive bands. Use Value: 2.5µA IQ enables >1-year battery backup during ignition-off; PG flag validates power integrity before modem initialization. | Use Scenario: Delivers robust 5V supply to ARM-based industrial controllers in factory automation equipment with wide input voltage variation. IC Role / Device Role / Timing Role: Main system regulator with BIAS pin connected to VOUT to maximize full-load efficiency; RT resistor sets 500kHz for optimal EMI filtering. Use Value: 42V max input withstands 36V industrial bus transients; exposed pad ensures reliable thermal performance 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 |
|---|---|---|---|
| LT8610AIMSE-5#TRPBF | Same 5V fixed output, 3.5A rating, and MSOP package but LT8610A variant - 82% light-load efficiency vs 91% for LT8610ABIMSE-5#TRPBF; higher output ripple in Burst Mode. | Preferred where lowest possible output ripple is prioritized over light-load efficiency (e.g., noise-sensitive analog circuits). | Select LT8610AIMSE-5#TRPBF only if system-level EMI testing shows LT8610ABIMSE-5#TRPBF ripple exceeds limits despite recommended 47µF output capacitance. |
| MPQ4333GQ-AEC1-P | Monolithic 5V/3.5A buck with 17µA IQ (vs 2.5µA), 45V max input, and AEC-Q100 Grade 1; lacks TR/SS tracking and has 60ns min on-time. | Suitable for cost-sensitive automotive modules where ultra-low IQ is secondary to BOM simplicity and supply chain diversification. | Choose MPQ4333GQ-AEC1-P when footprint compatibility is acceptable and system can tolerate higher IQ and reduced step-down ratio capability. |
Compared with LT8610AIMSE-5#TRPBF, the LT8610ABIMSE-5#TRPBF trades higher light-load ripple for 9% absolute efficiency gain at 1mA - critical for battery-backed systems. Versus MPQ4333GQ-AEC1-P, it offers 6.8× lower IQ and 30ns vs 60ns min on-time, enabling tighter VIN/VOUT ratios and longer battery life.
Availability
LT8610ABIMSE-5#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and telematics control units requiring stable component supply, AEC-Q100 compliance, and ultralow quiescent current performance.
Supply support for LT8610ABIMSE-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets.
The LT8610A/LT8610AB series was designed specifically for automotive and industrial applications demanding ultralow IQ, wide input range, and AEC-Q100 reliability - targeting always-on power rails in battery-constrained environments.
FAQ
What is the guaranteed output voltage tolerance for LT8610ABIMSE-5#TRPBF?
The LT8610ABIMSE-5#TRPBF delivers a fixed 5.00V output with guaranteed tolerance of ±1.5% over full temperature and load range, as specified in the Electrical Characteristics table (min 4.94V, max 5.06V at 0.5A, 8VIN). This tight regulation is achieved via laser-trimmed internal 12.5MΩ feedback divider, eliminating external resistor drift errors.
Does LT8610ABIMSE-5#TRPBF require an external feedback resistor network?
No, the LT8610ABIMSE-5#TRPBF does not require external feedback resistors. It integrates a precision 12.5MΩ internal resistor divider that sets the output to exactly 5.00V. Pin 16 is the VOUT pin - connect directly to output capacitors and load. External resistors would disrupt regulation and void the specified accuracy.
How does the BIAS pin improve efficiency in LT8610ABIMSE-5#TRPBF?
The BIAS pin on LT8610ABIMSE-5#TRPBF sources current for internal circuitry from VOUT (5V) instead of VIN when tied to VOUT, reducing VIN current draw by ~1–2% at full load. This lowers total power dissipation and improves thermal margin - especially valuable in high-ambient-temperature automotive applications where every watt matters.
Can LT8610ABIMSE-5#TRPBF operate with input voltage below 5V?
Yes, the LT8610ABIMSE-5#TRPBF operates down to 3.4V input, enabling use with partially discharged 5V auxiliary supplies or supercapacitor backups. However, dropout voltage is 200mV at 1A, so minimum functional input is ~5.2V at full 3.5A load. Below 5V input, output current capability decreases linearly per the dropout curve in the datasheet.
What is the purpose of the exposed thermal pad (Pin 17) on LT8610ABIMSE-5#TRPBF?
The exposed thermal pad (Pin 17) on LT8610ABIMSE-5#TRPBF is electrically connected to GND and serves as the primary thermal conduction path from the die to the PCB. It must be soldered to a large copper pour with multiple thermal vias to achieve the specified θJC(PAD) = 10°C/W. Omitting this connection risks thermal shutdown and premature failure under sustained 3.5A loads.
LT8610ABIMSE-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
LT8610ABIMSE-5#TRPBF FAQ
1.How can I place an order for LT8610ABIMSE-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610ABIMSE-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 LT8610ABIMSE-5#TRPBF reliable?
The price and inventory of LT8610ABIMSE-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 LT8610ABIMSE-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610ABIMSE-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610ABIMSE-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610ABIMSE-5#TRPBF?
LT8610ABIMSE-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610ABIMSE-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 LT8610ABIMSE-5#TRPBF?
For technical support, including LT8610ABIMSE-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610ABIMSE-5#TRPBF requirements.
6.How does Aetrix verify that LT8610ABIMSE-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610ABIMSE-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 LT8610ABIMSE-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610ABIMSE-5#TRPBF?
All LT8610ABIMSE-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610ABIMSE-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 LT8610ABIMSE-5#TRPBF part is unused and in its original packaging.
Return procedure for LT8610ABIMSE-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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