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Analog Devices Inc. LT8610AEMSE-3.3#TRPBF
- Part No.:
- LT8610AEMSE-3.3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610AEMSE-3.3#TRPBF.pdf
- Description:
- IC REG BUCK 3.3V 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,117
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Product details
Overview
LT8610AEMSE-3.3#TRPBF from Analog Devices is a 42V input, 3.5A synchronous step-down regulator with fixed 3.3V output, 2.5µA quiescent current in Burst Mode, 30ns minimum on-time, and ultralow ripple (<10mVP-P) - designed for automotive infotainment power rails requiring high efficiency at light loads.
For engineers reviewing the LT8610AEMSE-3.3#TRPBF datasheet, LT8610AEMSE-3.3#TRPBF pinout, LT8610AEMSE-3.3#TRPBF application, or LT8610AEMSE-3.3#TRPBF equivalent, key selection criteria include its AEC-Q100 qualification, 3.4–42V input range, 3.3V ±1% output accuracy over temperature, and MSOP-16 package with exposed thermal pad.
Technical Context
The LT8610AEMSE-3.3#TRPBF implements constant-frequency current-mode control with adjustable switching frequency (200kHz–2.2MHz via RT resistor), internal 0.97V reference, and integrated top/bottom NMOS power switches (120mΩ/65mΩ typical RDS(on)). It features frequency foldback during startup and overload, and supports pulse-skipping or external synchronization via SYNC pin.
Burst Mode operation enables regulation at 2.5µA IQ with <10mVP-P output ripple; EN/UV pin provides accurate 1.0V threshold undervoltage lockout; PG flag signals ±9% VOUT regulation status and fault conditions; TR/SS pin enables soft-start and tracking with 2.2µA internal pull-up.
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 (40V). |
| Output Voltage | Fixed 3.3V ±1% over –40°C to +125°C - eliminates external feedback resistors and reduces BOM count. |
| Max Output Current | 3.5A continuous - sufficient for powering SoCs, FPGAs, and multi-rail PMICs in compact automotive modules. |
| Quiescent Current | 2.5µA in Burst Mode at no load - enables always-on systems (e.g., telematics, ADAS sensors) with minimal battery drain. |
| Min On-Time | 30ns - enables high step-down ratios (e.g., 42V→3.3V) at 2MHz without pulse skipping, preserving EMI performance. |
| Output Ripple | <10mVP-P - meets stringent noise requirements for RF-sensitive analog circuits and high-speed digital interfaces. |
| Thermal Rating | –40°C to +125°C junction - qualified per AEC-Q100 Grade 1 for under-hood and dashboard applications. |
Pinout & Package
LT8610AEMSE-3.3#TRPBF uses a thermally enhanced 16-lead MSOP package with exposed GND pad (Pin 17), θJA = 40°C/W. The exposed pad must be soldered to PCB for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock sync input | Ground for low-ripple Burst Mode; tie to logic high or external clock for pulse-skipping/sync mode. |
| TR/SS (2) | Soft-start & tracking control | Capacitor-programmed voltage ramp rate; internal 2.2µA pull-up enables simple soft-start timing. |
| RT (3) | Frequency programming | Resistor-to-GND sets switching frequency from 200kHz to 2.2MHz - enables EMI optimization. |
| EN/UV (4) | Enable & input UVLO | 1.0V rising threshold with 40mV hysteresis - allows precise VIN brownout detection or system-level enable control. |
| VIN (5,6) | Main input power | High-current path for IC bias and top switch - requires local 1µF ceramic bypass close to pins. |
| NC (7) | No connect | Not internally bonded - leave unconnected or ground for mechanical stability. |
| GND (8) | Power & signal ground | Return path for bottom switch and control circuitry - must be tied to exposed pad (Pin 17). |
| SW (9,10,11) | Switch node | Drives external inductor and BST capacitor - keep trace short and low-inductance for EMI reduction. |
| BST (12) | Bootstrap supply | Requires 0.1µF ceramic capacitor to SW - enables high-side NMOS gate drive above VIN. |
| INTVCC (13) | Internal 3.4V regulator output | Bypass with ≥1µF ceramic; supplies internal logic - draws from BIAS if >3.1V, else from VIN. |
| BIAS (14) | Efficiency-boosting bias supply | Tie to VOUT (3.3V) to reduce VIN current draw and improve light-load efficiency. |
| PG (15) | Power good flag | Open-drain output active when VOUT is within ±9% of 3.3V - used for system sequencing and fault reporting. |
| VOUT (16) | Regulated 3.3V output | Fixed-output version with internal 14.3MΩ feedback divider - no external resistors required. |
| GND (17) | Exposed thermal pad | Mandatory solder connection to PCB ground plane - critical for thermal dissipation and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use across –40°C to +125°C ambient - supports safety-critical infotainment and body electronics. |
| Ultralow 2.5µA quiescent current | Enables >1-year battery standby in always-on vehicle modules without compromising regulation stability. |
| 30ns minimum on-time | Permits single-stage 42V→3.3V conversion at 2MHz, avoiding cascaded regulators and reducing solution size. |
| <10mVP-P output ripple | Eliminates need for post-regulation LDOs in noise-sensitive ADC, audio, and RF subsystems. |
| Integrated 3.3V fixed-output divider | Reduces component count by 2 resistors and associated layout area - improves reliability and manufacturing yield. |
| BIAS pin efficiency boost | Switches internal regulator supply from VIN to VOUT, cutting no-load input current by ~30% in 3.3V applications. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powering DSP, display controller, and USB PHY in head-unit systems with strict 12V battery rail constraints. IC Role / Device Role / Timing Role: Primary 3.3V buck converter delivering clean, regulated power with fast transient response to dynamic SoC loads. Use Value: 2.5µA IQ extends parked vehicle battery life; AEC-Q100 qualification ensures reliability in high-vibration, high-temp environments. | Use Scenario: Supplying image sensor, ISP, and MIPI interface in rear-view or surround-view camera ECUs. IC Role / Device Role / Timing Role: Fixed 3.3V regulator with low noise and tight line/load regulation for analog front-end stability. Use Value: <10mVP-P ripple prevents image noise; 30ns min on-time supports compact 2MHz design for space-constrained camera housings. |
| Telematics Control Unit (TCU) | Industrial IoT Gateway |
Use Scenario: Providing always-on 3.3V rail for cellular modem, GNSS receiver, and CAN transceiver in fleet management units. IC Role / Device Role / Timing Role: High-efficiency buck regulator enabling low-power sleep modes while maintaining real-time connectivity. Use Value: 2.5µA IQ and ±9% PG flag support robust wake-up supervision and battery health monitoring. | Use Scenario: Powering ARM Cortex-M7 microcontroller, Ethernet PHY, and wireless co-processor in edge gateway devices. IC Role / Device Role / Timing Role: Main system power supply with programmable frequency and soft-start for controlled power-up sequencing. Use Value: RT pin adjustability allows EMI tuning to meet CISPR-22 Class B; TR/SS pin enables synchronized startup with other rails. |
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-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 nodes where ripple can be filtered; less ideal for noise-sensitive analog circuits. | Select LT8610ABEMSE-3.3#TRPBF only if >5% efficiency gain at sub-10mA loads justifies added output capacitance for ripple suppression. |
| TPS54332DR | Lower max current (3A), higher IQ (19µA), no AEC-Q100 rating, and larger 8-pin SOIC package. | Targeted at industrial/commercial designs with relaxed thermal and automotive qualification requirements. | Choose TPS54332DR only for cost-sensitive non-automotive applications where 3.5A capability and AEC-Q100 are not required. |
Compared with LT8610ABEMSE-3.3#TRPBF, the LT8610AEMSE-3.3#TRPBF delivers lower output ripple and tighter regulation at light loads, making it preferable for analog-intensive systems; versus TPS54332DR, it offers superior automotive qualification, higher current, and significantly lower quiescent current - critical for battery-backed systems.
Availability
LT8610AEMSE-3.3#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and telematics control units requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LT8610AEMSE-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 developed specifically for automotive and industrial power systems demanding ultralow quiescent current, wide input range, and high reliability in harsh environments.
FAQ
What is the guaranteed operating temperature range for LT8610AEMSE-3.3#TRPBF?
The LT8610AEMSE-3.3#TRPBF is specified for operation from –40°C to +125°C junction temperature and is qualified per AEC-Q100 Grade 1. Its MSOP-16 package with exposed thermal pad ensures reliable thermal performance in automotive under-hood and dashboard applications where ambient temperatures reach 105°C.
Does LT8610AEMSE-3.3#TRPBF require external feedback resistors?
No, the LT8610AEMSE-3.3#TRPBF integrates an internal 14.3MΩ feedback resistor divider that fixes the output to 3.3V ±1%. This eliminates external resistors, reduces BOM count, improves accuracy over temperature, and minimizes board space - unlike adjustable versions such as LT8610AEMSE#TRPBF which require external FB network.
How does the BIAS pin improve efficiency in LT8610AEMSE-3.3#TRPBF?
The BIAS pin on LT8610AEMSE-3.3#TRPBF allows the internal 3.4V regulator to draw current from VOUT (3.3V) instead of VIN, reducing input supply current by ~30% at light loads. For optimal efficiency, tie BIAS directly to VOUT - this configuration is validated and recommended in the datasheet for fixed 3.3V applications.
What is the purpose of the TR/SS pin on LT8610AEMSE-3.3#TRPBF?
The TR/SS pin on LT8610AEMSE-3.3#TRPBF serves dual functions: soft-start control and output voltage tracking. A capacitor from TR/SS to GND sets the output voltage ramp rate during startup; it also enables tracking of another supply rail when driven externally. Internal 2.2µA pull-up current simplifies implementation with a single capacitor.
Can LT8610AEMSE-3.3#TRPBF synchronize to an external clock?
Yes, the LT8610AEMSE-3.3#TRPBF supports external clock synchronization via the SYNC pin (Pin 1). When driven with a logic-level square wave between 200kHz and 2.2MHz, the device aligns its switching edges to the external clock, enabling deterministic EMI reduction and multi-phase interleaving in complex power systems.
LT8610AEMSE-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
LT8610AEMSE-3.3#TRPBF FAQ
1.How can I place an order for LT8610AEMSE-3.3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610AEMSE-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 LT8610AEMSE-3.3#TRPBF reliable?
The price and inventory of LT8610AEMSE-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 LT8610AEMSE-3.3#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610AEMSE-3.3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610AEMSE-3.3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610AEMSE-3.3#TRPBF?
LT8610AEMSE-3.3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610AEMSE-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 LT8610AEMSE-3.3#TRPBF?
For technical support, including LT8610AEMSE-3.3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610AEMSE-3.3#TRPBF requirements.
6.How does Aetrix verify that LT8610AEMSE-3.3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610AEMSE-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 LT8610AEMSE-3.3#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610AEMSE-3.3#TRPBF?
All LT8610AEMSE-3.3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610AEMSE-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 LT8610AEMSE-3.3#TRPBF part is unused and in its original packaging.
Return procedure for LT8610AEMSE-3.3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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