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Analog Devices Inc. LT8610ACIMSE#TRPBF
- Part No.:
- LT8610ACIMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610ACIMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:835
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Product details
Overview
LT8610ACIMSE#TRPBF from Analog Devices is a 42V, 3.5A synchronous step-down regulator with 2.5µA quiescent current in Burst Mode, 0.80V feedback reference, 3.0V minimum input voltage, and 30ns minimum on-time. It delivers high efficiency (95% at 1A/5VOUT from 12VIN) for automotive infotainment power rails and industrial sensor nodes requiring ultra-low standby power.
For engineers reviewing the LT8610ACIMSE#TRPBF datasheet, LT8610ACIMSE#TRPBF pinout, LT8610ACIMSE#TRPBF application, or LT8610ACIMSE#TRPBF equivalent, key selection criteria include its AEC-Q100 qualification, programmable 200kHz–2.2MHz switching frequency via RT pin, soft-start/tracking capability via TR/SS pin, and ±8% power-good accuracy with fault signaling.
Technical Context
The LT8610ACIMSE#TRPBF employs constant-frequency current-mode control with internal 0.80V reference and slope compensation. Its 30ns minimum on-time enables high VIN/VOUT ratios (e.g., 42V→3.3V), while the SYNC pin supports external clock synchronization or pulse-skipping mode operation.
It integrates top and bottom NMOS power switches (120mΩ/65mΩ typical RDS(on)), features BIAS pin operation for improved light-load efficiency when VOUT ≥ 3.3V, and includes frequency foldback during startup or overload to limit inductor current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - supports wide-range industrial and automotive battery inputs including cold-crank conditions. |
| Quiescent Current | 2.5µA at no load - enables >1-year battery life in always-on IoT sensors powered from coin cells or backup batteries. |
| Feedback Reference | 0.800V ±6mV - allows precise output regulation down to 0.8V and simplifies resistor divider design for low-VOUT applications. |
| Max Output Current | 3.5A continuous - sufficient for powering FPGA I/O banks, microcontroller cores, or multi-rail PMICs in compact systems. |
| Min On-Time | 30ns - enables 42V→3.3V conversion at 2MHz without duty-cycle limitation, reducing solution size. |
| Switching Frequency | 200kHz to 2.2MHz (RT-programmable) - permits EMI optimization and inductor size reduction across diverse board layouts. |
| Power-Good Accuracy | ±8% of VFB - provides reliable system reset timing and fault detection for downstream processors and FPGAs. |
Pinout & Package
LT8610ACIMSE#TRPBF is housed in a thermally enhanced 16-lead MSOP package with exposed pad (Pin 17 = GND), θJA = 40°C/W. The exposed pad must be soldered to PCB for thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock input / mode select | Ground for low-ripple Burst Mode; tie to logic high or external clock for pulse-skipping/synchronization - directly controls IQ and EMI behavior. |
| TR/SS (2) | Soft-start & output tracking control | Capacitor-programmed voltage ramp rate; enables power sequencing with other rails and reduces inrush current during startup. |
| RT (3) | Frequency programming | Resistor-to-ground sets oscillator frequency - enables EMI tuning and inductor selection flexibility without changing IC. |
| EN/UV (4) | Enable & undervoltage lockout | Hysteretic threshold (1.015V rise, 0.97V fall) - provides clean power-up sequencing and brownout protection for automotive systems. |
| VIN (5,6) | Main input supply | High-current path for internal circuitry and top switch - requires local 1µF ceramic bypass close to pins for stability. |
| NC (7) | No connect | Internally unconnected - must remain floating; no external connection permitted. |
| GND (8) | Analog/digital ground return | Return path for bottom switch and control circuitry - must be tied to exposed pad (Pin 17) for thermal and noise integrity. |
| SW (9,10,11) | Power switch node | Drives external inductor and BST capacitor - requires minimal PCB area and tight layout to minimize EMI and switching losses. |
| BST (12) | Bootstrap supply | Provides gate drive above VIN for top NMOS - requires 0.1µF ceramic capacitor placed adjacent to IC for reliable high-side switching. |
| INTVCC (13) | Internal 3.4V regulator output | Bypassed with ≥1µF ceramic - powers internal logic; sourcing shifts to BIAS pin when VBIAS > 3.1V for higher efficiency. |
| BIAS (14) | Efficiency-optimized supply input | Tie to VOUT when ≥3.3V - reduces VIN current draw and improves light-load efficiency by >15% vs VIN-only operation. |
| PG (15) | Open-drain power-good flag | Asserts high when VOUT is within ±8% of target and no faults - used for processor reset, sequencer enable, or system health monitoring. |
| FB (16) | Feedback sense input | Regulated to 0.800V - connects to resistor divider tap; phase-lead capacitor (4.7–10pF) required for stability with large FB resistors. |
| GND (17) | Exposed thermal pad | Must be soldered to PCB ground plane - critical for thermal dissipation (θJC(PAD) = 10°C/W) and EMI suppression. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Rated for –40°C to +125°C junction temperature - certified for automotive infotainment, ADAS camera modules, and body electronics. |
| Ultralow IQ Burst Mode | 2.5µA input current at no load - extends battery runtime in always-on telematics and remote sensors without compromising regulation. |
| Programmable soft-start | TR/SS pin controlled via external capacitor - prevents output overshoot and enables precise power-rail sequencing in multi-voltage systems. |
| Improved EMI performance | Fast 30ns min on-time + Silent Switcher®-compatible layout - reduces high-frequency harmonics and eases compliance with CISPR 25 Class 5. |
| Synchronous rectification | Integrated 120mΩ/65mΩ NMOS switches - eliminates external Schottky loss, enabling >93% efficiency at 1A/3.3VOUT from 12VIN. |
Applications
| Automotive Infotainment Power | GSM Transceiver Supply |
|---|---|
Use Scenario: Powering LCD display backlight drivers and audio codecs in vehicle head units with 12V battery input subject to cold-crank dips. IC Role / Device Role / Timing Role: Primary 3.3V/2.5A buck converter with AEC-Q100 qualification and ±8% PG accuracy for safe system boot. Use Value: 2.5µA IQ ensures radio retains station memory during ignition-off; 30ns min on-time maintains regulation during 4.5V cold-crank events. | Use Scenario: Generating stable 3.3V rail for GSM/GPRS modems in asset trackers operating on Li-SOCl₂ primary batteries. IC Role / Device Role / Timing Role: High-efficiency step-down regulator with programmable soft-start to prevent modem brownout during transmit bursts. Use Value: 95% peak efficiency extends 10-year battery life; TR/SS-controlled ramp avoids GSM RF interference during power-up. |
| Industrial Sensor Node | Medical Portable Monitor |
Use Scenario: Providing regulated 1.8V and 3.3V supplies for low-power MCU, BLE radio, and analog front-end in wireless vibration sensors. IC Role / Device Role / Timing Role: Single-chip 3.5A buck with BIAS pin support to maximize battery life in energy-constrained edge devices. Use Value: BIAS-connected operation reduces no-load IQ by 30% vs VIN-only; RT-programmable frequency avoids sensitive RF bands. | Use Scenario: Delivering clean, sequenced 5V and 3.3V rails for ECG signal chain and display in portable patient monitors. IC Role / Device Role / Timing Role: Synchronous buck with ±8% PG flag and soft-start for safe power-up of analog precision circuits. Use Value: PG flag synchronizes ADC initialization; 0.80V reference enables accurate low-VOUT regulation for analog biasing. |
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#TRPBF | Higher 0.97V feedback voltage; 3.4V min VIN; same 3.5A/30ns specs | Less suitable for sub-3.4V input systems (e.g., single-cell Li-ion); lower light-load efficiency due to higher IQ | Select when 0.97V reference simplifies existing designs or input never drops below 3.4V. |
| MPQ4420AGL-AEC1-Z | 3.3V–60V input; 2A output; 17µA IQ; no SYNC or TR/SS pins | Lacks soft-start control, external sync, and ultra-low IQ - insufficient for battery-backed always-on systems | Choose only for cost-sensitive, non-battery applications where 2A output suffices and EMI is less critical. |
Compared with LT8610ABIMSE#TRPBF, the LT8610ACIMSE#TRPBF enables lower-VIN operation and tighter output regulation; versus MPQ4420AGL-AEC1-Z, it delivers 1.75× higher output current, 7× lower quiescent current, and full sequencing/sync capabilities essential for automotive and medical designs.
Availability
LT8610ACIMSE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial sensor nodes, and portable medical devices requiring stable component supply, AEC-Q100 qualification, and ultralow quiescent current performance.
Supply support for LT8610ACIMSE#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 industrial, automotive, communications, and healthcare markets.
The LT8610AC product line delivers high-efficiency, ultralow-IQ synchronous buck regulators optimized for automotive and battery-powered systems where reliability, thermal performance, and EMI control are critical.
FAQ
What is the guaranteed operating junction temperature range for the LT8610ACIMSE#TRPBF?
The LT8610ACIMSE#TRPBF is guaranteed over the full –40°C to +125°C junction temperature range. This rating is validated per AEC-Q100 Grade 1 requirements and confirmed in the device's Absolute Maximum Ratings table, making it suitable for under-hood automotive applications and industrial environments with wide ambient swings.
How does the BIAS pin improve efficiency in the LT8610ACIMSE#TRPBF?
The BIAS pin on the LT8610ACIMSE#TRPBF allows internal circuitry to draw current from VOUT instead of VIN when VBIAS ≥ 3.1V. When tied to a ≥3.3V output rail, this reduces input supply current by up to 30% at light loads - a verified design value documented in the Electrical Characteristics table and Typical Performance plots for the LT8610ACIMSE#TRPBF.
Can the LT8610ACIMSE#TRPBF be synchronized to an external clock, and what is the valid voltage range?
Yes, the LT8610ACIMSE#TRPBF supports external clock synchronization via the SYNC pin (Pin 1). Valid input levels are 0.8V to 2.4V for logic thresholds, with recommended drive of 3V or higher for pulse-skipping mode. The SYNC pin must never be left floating - grounding enables Burst Mode, while DC high or AC clock enables synchronized pulse-skipping operation per the Pin Functions section.
What is the purpose of the TR/SS pin on the LT8610ACIMSE#TRPBF, and how is it configured?
The TR/SS pin on the LT8610ACIMSE#TRPBF serves dual functions: soft-start control and output voltage tracking. A capacitor from TR/SS to GND programs the output voltage ramp rate during startup. For tracking, connecting another rail's feedback node to TR/SS forces the LT8610ACIMSE#TRPBF to follow that voltage until it exceeds 0.8V - a feature explicitly defined in the Pin Functions description and block diagram.
Does the LT8610ACIMSE#TRPBF include overtemperature protection, and how does it behave?
Yes, the LT8610ACIMSE#TRPBF includes overtemperature protection that activates above 150°C junction temperature. When triggered, the device shuts down switching and draws minimal current until temperature falls below the hysteresis threshold. This behavior is documented in Note 3 of the Absolute Maximum Ratings section and ensures robust operation during sustained overload or poor heatsinking conditions.
LT8610ACIMSE#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):
- 3V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 0.8V
- 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
LT8610ACIMSE#TRPBF FAQ
1.How can I place an order for LT8610ACIMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610ACIMSE#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 LT8610ACIMSE#TRPBF reliable?
The price and inventory of LT8610ACIMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8610ACIMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610ACIMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610ACIMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610ACIMSE#TRPBF?
LT8610ACIMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610ACIMSE#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 LT8610ACIMSE#TRPBF?
For technical support, including LT8610ACIMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610ACIMSE#TRPBF requirements.
6.How does Aetrix verify that LT8610ACIMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610ACIMSE#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 LT8610ACIMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610ACIMSE#TRPBF?
All LT8610ACIMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610ACIMSE#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 LT8610ACIMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT8610ACIMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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