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Analog Devices Inc. LT8610AIMSE-3.3#TRPBF
- Part No.:
- LT8610AIMSE-3.3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610AIMSE-3.3#TRPBF.pdf
- Description:
- IC REG BUCK 3.3V 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,390
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Product details
Overview
LT8610AIMSE-3.3#TRPBF from Analog Devices is a 42V, 3.5A synchronous step-down regulator with 2.5µA quiescent current in Burst Mode, fixed 3.3V output, 30ns minimum on-time, and AEC-Q100 qualification for automotive power supplies. It delivers high efficiency (93% at 1A/12VIN→3.3VOUT) and low dropout (200mV at 1A) in a thermally enhanced 16-lead MSOP package.
For engineers reviewing the LT8610AIMSE-3.3#TRPBF datasheet, LT8610AIMSE-3.3#TRPBF pinout, LT8610AIMSE-3.3#TRPBF application, or LT8610AIMSE-3.3#TRPBF equivalent, key selection criteria include ultralow IQ regulation, fixed 3.3V output accuracy (±0.6%), 3.4V–42V input range, and compatibility with external synchronization and soft-start control.
Technical Context
The LT8610AIMSE-3.3#TRPBF employs constant-frequency current-mode control with an internal 0.97V reference and programmable switching frequency (200kHz–2.2MHz via RT pin). Its architecture integrates top and bottom NMOS power switches with 120mΩ and 65mΩ on-resistances, enabling high-efficiency synchronous rectification without external diodes.
Burst Mode operation shuts down internal circuitry between switching bursts to achieve 2.5µA IQ, while pulse-skipping mode (enabled via SYNC pin) maintains continuous oscillator operation for lower noise. The device features integrated overtemperature protection, VIN undervoltage lockout (1V EN/UV threshold), and PG flag signaling ±9% VOUT regulation tolerance and fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.4V to 42V - supports wide automotive battery transients and industrial DC rails without pre-regulation. |
| Output Voltage | Fixed 3.3V ±0.6% - internally trimmed; eliminates external feedback resistors and reduces BOM count. |
| Max Output Current | 3.5A - sufficient for powering microcontrollers, sensors, and communication ICs in compact systems. |
| Quiescent Current | 2.5µA in Burst Mode - enables always-on functionality in battery-powered automotive modules. |
| Min On-Time | 30ns - allows high step-down ratios (e.g., 42V→3.3V) at 2MHz switching without pulse skipping. |
| Switching Frequency | 200kHz to 2.2MHz - adjustable via RT resistor; supports EMI optimization and small external component selection. |
| Thermal Rating | –40°C to +125°C junction - qualified per AEC-Q100 Grade I for under-hood automotive use. |
Pinout & Package
LT8610AIMSE-3.3#TRPBF uses a 16-lead plastic MSOP package with exposed thermal pad (Pin 17 = GND), θJA = 40°C/W. The exposed pad must be soldered to PCB for thermal performance and electrical grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock sync input | Enables synchronization to external clock or forces Burst Mode (GND) / pulse-skipping (high) operation. |
| TR/SS (2) | Soft-start and tracking control | Capacitor-programmable voltage ramp rate; enables output tracking during startup or sequencing. |
| RT (3) | Frequency programming | Resistor-to-ground sets switching frequency from 200kHz to 2.2MHz with tight tolerance. |
| EN/UV (4) | Enable and input UVLO | 1.0V rising threshold enables operation; hysteresis prevents chatter during brown-out conditions. |
| VIN (5,6) | Main power input | Dual pins reduce trace resistance and inductance; require local 1µF ceramic bypass near package. |
| NC (7) | No connect | Internally unconnected; must remain floating or grounded per layout best practices. |
| GND (8) | Power and signal ground | Return path for bottom switch; ties to exposed pad (Pin 17) for thermal and electrical integrity. |
| VOUT (16) | Regulated 3.3V output | Fixed-output pin with internal 14.3MΩ feedback divider; connects directly to load and output capacitor. |
| PG (15) | Power good flag | Open-drain output signals ±9% regulation window and fault conditions (e.g., overtemp, UVLO). |
| BIAS (14) | Bias supply input | When tied to VOUT ≥3.3V, powers internal regulators from output rail-reducing VIN current and improving efficiency. |
| INTVCC (13) | Internal 3.4V regulator bypass | Requires ≥1µF ceramic capacitor to ground; supplies gate drivers and control logic when BIAS not used. |
| BST (12) | Bootstrap supply | Drives top NMOS gate above VIN; requires 0.1µF ceramic capacitor between BST and SW pins. |
| SW (9,10,11) | Switch node | High-current connection to inductor and boost capacitor; must be minimized in PCB area to reduce EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 2.5µA IQ enables >10-year battery life in always-on automotive modules (e.g., CAN nodes, telematics). |
| AEC-Q100 Grade I qualification | Validated for –40°C to +125°C operation with full reliability testing-suitable for engine control and ADAS subsystems. |
| 30ns minimum on-time | Supports 42V→3.3V conversion at 2MHz without duty-cycle limitation, enabling compact 2-layer PCB designs. |
| Integrated BIAS pin functionality | Reduces input supply current by sourcing INTVCC from VOUT, improving light-load efficiency by up to 15%. |
| Robust fault protection | Includes thermal shutdown, overcurrent limiting (6.7A top switch), and PG flag for system-level monitoring and safe startup. |
Applications
| Automotive Infotainment Power | GSM Base Station RF Power |
|---|---|
Use Scenario: Powering SoC, display controller, and audio codec in head unit with cold-crank (4.5V) and load-dump (42V) immunity. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator delivering stable, low-noise supply with fast transient response to dynamic processor loads. Use Value: 2.5µA IQ extends backup battery runtime during vehicle sleep; 30ns min-on-time ensures regulation across full battery range without external LDO. | Use Scenario: Generating 3.3V bias for RF power amplifiers and transceiver ICs in outdoor base station radios. IC Role / Device Role / Timing Role: High-efficiency, EMI-optimized DC/DC converter operating at 1.5MHz to avoid critical LTE bands. Use Value: Adjustable frequency and spread-spectrum capability (via SYNC) reduce conducted emissions; 3.5A output supports multi-channel PA biasing. |
| Industrial PLC I/O Module | Medical Portable Monitor |
Use Scenario: Providing isolated 3.3V logic supply for digital I/O, ADCs, and communication interfaces in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Input-stage buck converter accepting wide 9–36V DC input from industrial power supplies. Use Value: 42V absolute max rating withstands 36V nominal rail surges; PG flag enables system-level power sequencing and diagnostics. | Use Scenario: Battery-powered patient monitor requiring long runtime and silent operation during sleep mode. IC Role / Device Role / Timing Role: Main 3.3V supply for ARM Cortex-M MCU, OLED display, and sensor interface ASIC. Use Value: Burst Mode IQ of 2.5µA extends lithium battery life beyond 72 hours in standby; low EMI avoids interference with analog front-end signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8610ABIMSE-3.3#TRPBF | Higher light-load efficiency (91% vs 82% at 1mA), but increased output ripple in Burst Mode due to 1A burst current limit. | Better suited for ultra-low-power always-on functions where ripple can be filtered with larger COUT; less ideal for noise-sensitive analog circuits. | Select LT8610ABIMSE-3.3#TRPBF if maximizing battery life at µA loads is critical and ripple filtering is feasible. |
| LMQ66430QRNXTQ1 | 42V, 3A, 15µA IQ, automotive-grade; lacks SYNC and TR/SS pins; fixed 3.3V output with ±1% accuracy. | Lower integration (no soft-start control or external sync); simpler layout but less flexible for complex power sequencing. | Choose LMQ66430QRNXTQ1 for cost-sensitive automotive applications where advanced features are unnecessary and ±1% output tolerance is acceptable. |
Compared with LT8610ABIMSE-3.3#TRPBF, the LT8610AIMSE-3.3#TRPBF offers tighter output ripple control and lower Burst Mode current limit for quieter operation, while the LMQ66430QRNXTQ1 trades feature set for lower BOM cost and simplified design-making each suitable for distinct tiers of automotive and industrial power requirements.
Availability
LT8610AIMSE-3.3#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC I/O, GSM RF power, and portable medical monitor designs requiring stable component supply, AEC-Q100 compliance, and ultralow quiescent current performance.
Supply support for LT8610AIMSE-3.3#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 robust fault protection in compact packages.
FAQ
What is the guaranteed output voltage accuracy of the LT8610AIMSE-3.3#TRPBF over temperature and line?
The LT8610AIMSE-3.3#TRPBF guarantees 3.3V output within ±0.6% over –40°C to +125°C junction temperature and 4V to 42V input range at 0.5A load. This is achieved via laser-trimmed internal 14.3MΩ feedback divider and 0.97V reference with <0.02%/V line regulation.
Can the LT8610AIMSE-3.3#TRPBF be synchronized to an external clock, and what are the voltage thresholds?
Yes, the LT8610AIMSE-3.3#TRPBF supports external synchronization via the SYNC pin (Pin 1). SYNC falling threshold is 0.8V–1.4V and rising threshold is 1.6V–2.4V. When driven with a clean CMOS clock, the device locks to the external frequency and operates in pulse-skipping mode.
How does the BIAS pin improve efficiency in the LT8610AIMSE-3.3#TRPBF, and what is the recommended connection?
The BIAS pin (Pin 14) improves efficiency by sourcing INTVCC regulator current from VOUT instead of VIN when VBIAS ≥3.1V. For the LT8610AIMSE-3.3#TRPBF, tie BIAS directly to VOUT; this reduces input current draw and increases light-load efficiency by up to 15% compared to VIN-only operation.
What thermal management requirements apply to the LT8610AIMSE-3.3#TRPBF in high-power applications?
The LT8610AIMSE-3.3#TRPBF requires soldering of its exposed thermal pad (Pin 17) to a minimum 200mm² copper pour with ≥4 thermal vias to internal ground planes. With proper layout, it sustains 3.5A continuous output at +85°C ambient; derating is required above that per θJA = 40°C/W.
Does the LT8610AIMSE-3.3#TRPBF support power sequencing with other rails, and how is it implemented?
Yes, the LT8610AIMSE-3.3#TRPBF supports precise power sequencing via its TR/SS (Pin 2) and PG (Pin 15) pins. TR/SS accepts an external voltage ramp to control VOUT slew rate, while PG provides an open-drain signal indicating ±9% regulation-enabling coordination with other regulators in multi-rail systems.
LT8610AIMSE-3.3#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):
- 3.3V
- 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-3.3#TRPBF FAQ
1.How can I place an order for LT8610AIMSE-3.3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610AIMSE-3.3#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-3.3#TRPBF reliable?
The price and inventory of LT8610AIMSE-3.3#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-3.3#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610AIMSE-3.3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610AIMSE-3.3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610AIMSE-3.3#TRPBF?
LT8610AIMSE-3.3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610AIMSE-3.3#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-3.3#TRPBF?
For technical support, including LT8610AIMSE-3.3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610AIMSE-3.3#TRPBF requirements.
6.How does Aetrix verify that LT8610AIMSE-3.3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610AIMSE-3.3#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-3.3#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610AIMSE-3.3#TRPBF?
All LT8610AIMSE-3.3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610AIMSE-3.3#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-3.3#TRPBF part is unused and in its original packaging.
Return procedure for LT8610AIMSE-3.3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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