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Analog Devices Inc. LT8610ABHMSE-3.3#TRPBF
- Part No.:
- LT8610ABHMSE-3.3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610ABHMSE-3.3#TRPBF.pdf
- Description:
- IC REG BUCK 3.3V 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,520
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Product details
Overview
LT8610ABHMSE-3.3#TRPBF from Analog Devices is a 42V, 3.5A synchronous step-down regulator with 2.5µA quiescent current, fixed 3.3V output, and 30ns minimum on-time. It operates in ultralow-IQ Burst Mode®, supports 200kHz–2.2MHz synchronization, and delivers 91% efficiency at 1mA load (12VIN→3.3VOUT). Used in automotive infotainment power rails requiring AEC-Q100-compliant, low-noise DC/DC conversion.
For engineers reviewing the LT8610ABHMSE-3.3#TRPBF datasheet, LT8610ABHMSE-3.3#TRPBF pinout, LT8610ABHMSE-3.3#TRPBF application, or LT8610ABHMSE-3.3#TRPBF equivalent, key selection criteria include its –40°C to 150°C junction temperature rating, integrated 14.3MΩ feedback divider, PG flag with ±9% output monitoring, and BIAS pin support for improved light-load efficiency.
Technical Context
The LT8610ABHMSE-3.3#TRPBF employs constant-frequency current-mode control with internal 0.97V reference and programmable oscillator via RT pin. Its architecture integrates top and bottom NMOS power switches (120mΩ/65mΩ), enabling synchronous rectification without external diodes.
Burst Mode operation shuts down all control circuitry between switching bursts, reducing input current to 2.5µA at no load. The device features frequency foldback during startup/overload, EN/UV pin with 1.0V accurate threshold and 40mV hysteresis, and PG flag signaling VOUT regulation status 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 24V/36V rails. |
| Output Voltage | Fixed 3.3V ±1.5% - internally trimmed; eliminates external feedback resistors and saves board space. |
| Max Output Current | 3.5A - sufficient for powering SoCs, FPGAs, and multi-rail PMICs in compact designs. |
| Quiescent Current | 2.5µA at no load - enables always-on systems (e.g., telematics, ADAS sensors) with multi-year battery life. |
| Min On-Time | 30ns - allows high step-down ratios (e.g., 42V→3.3V at 2MHz) without pulse skipping. |
| Switching Frequency | 200kHz–2.2MHz - adjustable via RT resistor; enables EMI optimization and small magnetics selection. |
| Efficiency @ 1mA | 91% (12V→3.3V) - significantly higher than LT8610A (82%) due to optimized Burst Mode architecture. |
Pinout & Package
LT8610ABHMSE-3.3#TRPBF uses a thermally enhanced 16-lead MSOP package with exposed GND pad (Pin 17). 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; grounded for low-ripple Burst Mode. |
| TR/SS (2) | Soft-start/tracking control | Programs output voltage ramp rate via capacitor; enables output tracking during sequencing; pulled low during fault/shutdown. |
| RT (3) | Oscillator frequency set | Resistor-to-ground sets switching frequency (200kHz–2.2MHz); disables foldback when SYNC is high. |
| EN/UV (4) | Enable/undervoltage lockout | 1.0V rising threshold with 40mV hysteresis; allows precise VIN brownout protection or remote enable. |
| VIN (5,6) | Main power input | Supplies internal circuitry and top switch; requires local 1µF ceramic bypass close to pins. |
| NC (7) | No connect | Not bonded; must remain unconnected per design. |
| GND (8) | Power ground return | Return path for bottom switch; ties to exposed pad (Pin 17) for lowest thermal resistance. |
| VOUT (16) | Regulated output | Fixed 3.3V output; connects internally to 14.3MΩ feedback divider - no external resistors needed. |
| SW (9,10,11) | Switch node | Drives external inductor; must be minimized on PCB to reduce EMI and switching losses. |
| BST (12) | Bootstrap supply | Requires 0.1µF ceramic capacitor to SW for top switch gate drive; critical for high-side NMOS operation. |
| INTVCC (13) | Internal 3.4V regulator | Bypassed with ≥1µF ceramic; powers internal logic; draws from BIAS if >3.1V, else from VIN. |
| BIAS (14) | Efficiency boost 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 high when VOUT is within ±9% of 3.3V and no faults detected. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Rated for automotive applications across –40°C to +150°C junction temperature (H-grade). |
| Ultralow quiescent current | 2.5µA IQ in regulation enables >10-year battery life in always-on vehicle modules. |
| Fixed 3.3V output with internal divider | Eliminates external feedback resistors and associated layout sensitivity and error sources. |
| 30ns minimum on-time | Supports high-frequency, high-step-down operation (e.g., 42V→3.3V at 2MHz) without duty-cycle limitation. |
| BIAS pin efficiency enhancement | Reduces VIN current draw by sourcing INTVCC from VOUT, improving light-load efficiency by up to 8%. |
| PG flag with ±9% accuracy | Provides reliable system-level power sequencing and fault detection without external comparators. |
Applications
| Automotive Infotainment Power Supply | Industrial IoT Sensor Node |
|---|---|
Use Scenario: Powers display controller, audio codec, and MCU in head unit with cold-crank (4.5V) and load-dump (42V) resilience. IC Role / Device Role / Timing Role: Primary 3.3V buck converter delivering 3.5A with AEC-Q100 reliability and <2.5µA standby draw. Use Value: Enables single-chip solution meeting ISO 16750-2 transient requirements while minimizing PCB area and thermal management complexity. | Use Scenario: Powers ultra-low-power wireless sensor (LoRaWAN/NB-IoT) with 10-year battery life in remote monitoring deployments. IC Role / Device Role / Timing Role: Always-on 3.3V regulator maintaining MCU and radio sleep states with burst-mode IQ of 2.5µA. Use Value: Extends battery life by >3× versus standard buck converters, eliminating need for external LDOs or complex power gating. |
| Telecom Base Station Management | Medical Portable Diagnostic Device |
Use Scenario: Supplies FPGA configuration and control logic in remote radio units operating from 24V/48V telecom supplies. IC Role / Device Role / Timing Role: High-efficiency 3.3V point-of-load regulator with 200kHz–2.2MHz sync capability for EMI compliance. Use Value: Reduces thermal footprint and enables dense board layouts while meeting EN 55022 Class B conducted emissions limits. | Use Scenario: Powers patient-monitoring SoC and analog front-end in battery-operated ultrasound or ECG devices. IC Role / Device Role / Timing Role: Medical-grade 3.3V supply with PG flag for system health monitoring and fault-safe shutdown. Use Value: Ensures regulatory compliance (IEC 60601-1) via guaranteed AEC-Q100 reliability and ±9% PG accuracy for safety-critical sequencing. |
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 |
|---|---|---|---|
| LT8610AHMSE-3.3#TRPBF | Same H-grade temp range (–40°C to 150°C) but LT8610A variant; 82% light-load efficiency vs. 91% for LT8610AB. | Lacks LT8610AB's improved Burst Mode efficiency; suitable where lower ripple is prioritized over IQ. | Select when output voltage ripple <10mVP-P is mandatory and light-load efficiency is secondary. |
| LT8640S HMSE-3.3#TRPBF | Higher 6A output, 2.5µA IQ, same 42V input, but 20ns min on-time and different pinout (no BIAS pin). | Supports higher current loads and tighter step-down ratios; lacks BIAS pin for efficiency tuning. | Choose for >3.5A applications or when 20ns min on-time is required; verify PCB layout compatibility. |
Compared with LT8610AHMSE-3.3#TRPBF and LT8640S HMSE-3.3#TRPBF, the LT8610ABHMSE-3.3#TRPBF uniquely balances ultralow IQ (2.5µA), AEC-Q100 H-grade reliability, and 91% light-load efficiency-making it optimal for automotive and battery-sensitive industrial systems where both longevity and thermal margin matter.
Availability
LT8610ABHMSE-3.3#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial IoT sensor nodes, telecom base station management, and medical portable diagnostic devices requiring stable component supply across extended temperature ranges.
Supply support for LT8610ABHMSE-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 precision instrumentation, industrial automation, communications, and automotive markets.
The LT8610AB series belongs to Analog Devices' Power by Linear™ portfolio, designed specifically for high-efficiency, low-quiescent-current DC/DC conversion in space-constrained, thermally demanding environments such as automotive and industrial edge systems.
FAQ
What is the maximum junction temperature rating for LT8610ABHMSE-3.3#TRPBF?
The LT8610ABHMSE-3.3#TRPBF is rated for operation from –40°C to +150°C junction temperature (H-grade), verified per AEC-Q100 stress test conditions. This rating is confirmed in the Absolute Maximum Ratings table and applies across the full operating range with appropriate thermal design using the exposed GND pad.
Does LT8610ABHMSE-3.3#TRPBF require external feedback resistors?
No, the LT8610ABHMSE-3.3#TRPBF integrates a precision 14.3MΩ internal feedback resistor divider that sets the output to 3.3V ±1.5%. This eliminates external resistors, reduces component count, improves accuracy over temperature, and removes layout sensitivity - a key advantage over adjustable-output regulators.
How does the BIAS pin improve efficiency in LT8610ABHMSE-3.3#TRPBF?
The BIAS pin on LT8610ABHMSE-3.3#TRPBF allows the internal 3.4V regulator (INTVCC) to draw current from VOUT instead of VIN when VOUT ≥ 3.3V. This reduces VIN current draw by ~30% at light loads and improves overall efficiency - especially critical in battery-powered applications where every microamp counts.
What is the function of the PG pin on LT8610ABHMSE-3.3#TRPBF?
The PG (Power Good) pin on LT8610ABHMSE-3.3#TRPBF is an open-drain output that goes high only when VOUT is within ±9% of 3.3V and no fault conditions (e.g., overtemperature, undervoltage) are present. It provides system-level power sequencing and health monitoring without external circuitry.
Can LT8610ABHMSE-3.3#TRPBF synchronize to an external clock?
Yes, the LT8610ABHMSE-3.3#TRPBF supports external clock synchronization via the SYNC pin (Pin 1). When driven with a TTL/CMOS clock signal, it aligns switching edges to the external frequency (200kHz–2.2MHz), enabling deterministic EMI reduction and multi-regulator phase control in complex power systems.
LT8610ABHMSE-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 ~ 2.24MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT8610ABHMSE-3.3#TRPBF FAQ
1.How can I place an order for LT8610ABHMSE-3.3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610ABHMSE-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 LT8610ABHMSE-3.3#TRPBF reliable?
The price and inventory of LT8610ABHMSE-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 LT8610ABHMSE-3.3#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610ABHMSE-3.3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610ABHMSE-3.3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610ABHMSE-3.3#TRPBF?
LT8610ABHMSE-3.3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610ABHMSE-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 LT8610ABHMSE-3.3#TRPBF?
For technical support, including LT8610ABHMSE-3.3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610ABHMSE-3.3#TRPBF requirements.
6.How does Aetrix verify that LT8610ABHMSE-3.3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610ABHMSE-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 LT8610ABHMSE-3.3#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610ABHMSE-3.3#TRPBF?
All LT8610ABHMSE-3.3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610ABHMSE-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 LT8610ABHMSE-3.3#TRPBF part is unused and in its original packaging.
Return procedure for LT8610ABHMSE-3.3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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