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Analog Devices Inc. LT8610AHMSE-5#TRPBF
- Part No.:
- LT8610AHMSE-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610AHMSE-5#TRPBF.pdf
- Description:
- IC REG BUCK 5V 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,698
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Product details
Overview
LT8610AHMSE-5#TRPBF from Analog Devices is a 42V, 3.5A synchronous step-down regulator with 2.5µA quiescent current, fixed 5V output, and AEC-Q100 qualification for automotive applications. It features 30ns minimum on-time, 200kHz–2.2MHz adjustable switching frequency, and operates across –40°C to 150°C junction temperature. Used in automotive infotainment power supplies requiring ultra-low IQ and high reliability.
For engineers reviewing the LT8610AHMSE-5#TRPBF datasheet, LT8610AHMSE-5#TRPBF pinout, LT8610AHMSE-5#TRPBF application, or LT8610AHMSE-5#TRPBF equivalent, key selection criteria include input voltage range (3.4V–42V), burst-mode efficiency at light load, thermal grade (H-grade, 150°C), fixed 5V output accuracy (±1%), and MSOP-16 package with exposed pad for thermal management.
Technical Context
The LT8610AHMSE-5#TRPBF implements constant-frequency current-mode control with internal 0.97V reference and integrated top/bottom NMOS power switches (120mΩ/65mΩ). Its oscillator supports RT-resistor programming and disables frequency foldback when SYNC is held high, enabling precise timing control in noise-sensitive systems.
Burst Mode operation reduces quiescent current to 2.5µA at no load while maintaining regulation; the H-grade variant ensures stable performance up to 150°C junction temperature, with thermal shutdown and overcurrent protection active during overload conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.4V to 42V - supports wide automotive battery transients including cold-crank (down to ~3.4V) and load-dump (up to 42V) |
| Output Voltage | Fixed 5.00V ±1% - internally trimmed; eliminates external feedback resistors and improves accuracy vs. resistor-divider solutions |
| Max Output Current | 3.5A continuous - enables single-chip 5V/3.5A rail for microcontrollers, displays, or sensors without external boost |
| Quiescent Current | 2.5µA in Burst Mode - sustains low-power sleep states in always-on automotive modules (e.g., telematics, ADAS sensors) |
| Min On-Time | 30ns - allows high step-down ratios (e.g., 42V→5V at 2MHz) without pulse-skipping instability |
| Operating Temp | –40°C to +150°C (junction) - qualified per AEC-Q100 Grade H for under-hood and engine-control applications |
| Switching Freq | 200kHz to 2.2MHz - programmable via RT pin; avoids AM band interference and enables compact magnetics |
Pinout & Package
LT8610AHMSE-5#TRPBF uses a thermally enhanced 16-lead MSOP package with exposed GND pad (Pin 17), θJA = 40°C/W, θJC(PAD) = 10°C/W. The exposed pad must be soldered to PCB for thermal integrity and EMI reduction.
| 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 or synchronization |
| TR/SS (2) | Soft-start & tracking control | Capacitor-programmable VOUT ramp rate; enables power sequencing with other rails |
| RT (3) | Frequency set resistor | Resistor-to-GND sets switching frequency from 200kHz to 2.2MHz; enables EMI optimization |
| EN/UV (4) | Enable & input UVLO | 1.0V threshold with 40mV hysteresis; supports VIN undervoltage lockout or system-level enable control |
| VIN (5,6) | Main input power | Dual pins reduce IR drop and improve high-current routing; requires local 1µF ceramic bypass |
| NC (7) | No connect | Not bonded; must remain unconnected and unrouted |
| GND (8) | Power ground return | Return path for bottom switch; ties to exposed pad (Pin 17) for lowest thermal resistance |
| SW (9,10,11) | Switch node | High-current output of internal power switches; connects to inductor and BST capacitor; minimize loop area |
| BST (12) | Bootstrap supply | Drives top NMOS gate; requires 0.1µF ceramic capacitor placed adjacent to IC |
| INTVCC (13) | Internal 3.4V regulator | Bypass with ≥1µF ceramic; powers control circuitry; draws from BIAS if >3.1V, else from VIN |
| BIAS (14) | Efficiency-boost bias supply | Tie to VOUT (5V) to reduce VIN current draw and improve light-load efficiency |
| PG (15) | Power good flag | Open-drain output signals VOUT within ±9% of target and absence of faults; valid above 3.4V VIN |
| VOUT (16) | Regulated 5V output | Fixed 5V output with internal 12.5MΩ feedback divider; connects directly to load and output capacitors |
| GND (17) | Exposed thermal pad | Mandatory solder connection to PCB ground plane; primary thermal path and EMI shield |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade H qualification | Validated for automotive under-hood use up to 150°C junction temperature with full reliability testing |
| Ultralow 2.5µA quiescent current | Enables >1-year battery standby in always-on vehicle modules without compromising regulation stability |
| 30ns minimum on-time | Supports high-frequency, high-ratio conversion (e.g., 42V→5V @ 2MHz) without duty-cycle limitation |
| Integrated 5V fixed-output feedback | Eliminates external resistor network, reducing BOM count, layout area, and output voltage drift over temp |
| BIAS pin efficiency enhancement | Reduces input current by sourcing INTVCC from VOUT instead of VIN-critical for high-efficiency 5V systems |
| Robust fault protection | Includes overcurrent limiting, thermal shutdown, PG fault signaling, and VIN UVLO-no external supervision needed |
Applications
| Automotive Infotainment Power | Industrial Control Module Supply |
|---|---|
Use Scenario: Powering head-unit SoCs, display drivers, and audio codecs in vehicles with wide battery voltage swings and strict EMC requirements. IC Role / Device Role / Timing Role: Primary 5V buck converter delivering regulated, low-noise, high-reliability power with fast transient response. Use Value: 2.5µA IQ extends battery backup time; 30ns on-time enables 2MHz operation to avoid AM band; AEC-Q100 H-grade ensures operation at 150°C near engine bay. | Use Scenario: Providing stable 5V rail for PLC I/O modules, motor controllers, and fieldbus interfaces operating in harsh industrial environments. IC Role / Device Role / Timing Role: Main DC-DC regulator converting 24V industrial bus to isolated 5V logic supply with high efficiency across load range. Use Value: 42V max input withstands 36V transients; 3.5A output drives multiple peripherals; exposed pad ensures thermal stability in sealed enclosures. |
| GSM Base Station RF Power Supply | Telematics Control Unit (TCU) |
Use Scenario: Generating clean 5V bias for RF front-end components (PA drivers, LNAs) in cellular infrastructure equipment. IC Role / Device Role / Timing Role: High-efficiency, low-EMI buck stage preceding LDOs or filtering networks to meet spectral mask requirements. Use Value: Burst Mode minimizes idle power; adjustable frequency avoids sensitive bands; low output ripple (<10mVP-P) reduces RF noise coupling. | Use Scenario: Powering GPS/GNSS receivers, cellular modems, and CAN transceivers in vehicle telematics units with persistent battery connection. IC Role / Device Role / Timing Role: Always-on 5V regulator supporting low-power sleep modes and rapid wake-up without brownout. Use Value: 2.5µA IQ enables multi-year battery life in disconnected state; PG flag synchronizes firmware boot sequence with power readiness. |
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 |
|---|---|---|---|
| LT8610ABHMSE-5#TRPBF | Same H-grade temp range and 5V fixed output, but LT8610AB variant offers higher light-load efficiency (91% vs 82% at 1mA) at cost of increased output ripple | Preferred where ultra-low IQ and minimal standby loss dominate over ripple sensitivity (e.g., battery-backed memory retention) | Select LT8610ABHMSE-5#TRPBF only if measured ripple can be managed with added output capacitance; otherwise LT8610AHMSE-5#TRPBF delivers lower noise. |
| LM61480RQWR | 42V, 8A automotive buck; 15µA IQ; no fixed 5V option-requires external feedback; different pinout and package (20-pin WQFN) | Suitable for higher-current designs needing flexibility, but requires redesign for feedback, layout, and thermal management | Choose LM61480RQWR only when >3.5A output or programmable VOUT is required; not a drop-in replacement due to pinout, package, and configuration differences. |
Compared with LT8610ABHMSE-5#TRPBF, the LT8610AHMSE-5#TRPBF provides lower output ripple and simpler EMI filtering, while LM61480RQWR offers higher current headroom at the expense of design complexity and higher quiescent current-making LT8610AHMSE-5#TRPBF optimal for space-constrained, noise-sensitive 5V/3.5A automotive applications.
Availability
LT8610AHMSE-5#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial control modules, and telematics units requiring stable component supply with AEC-Q100 compliance, extended temperature support, and ultralow quiescent current.
Supply support for LT8610AHMSE-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, high reliability, and robust thermal performance-enabling next-generation power architectures in safety-critical and energy-sensitive systems.
FAQ
What is the maximum input voltage rating for the LT8610AHMSE-5#TRPBF?
The LT8610AHMSE-5#TRPBF has an absolute maximum input voltage rating of 42V on the VIN pins. This allows reliable operation across automotive battery transients including load dump events. Operation above 42V risks permanent damage; sustained input above 36V should be verified against thermal limits using the device's θJA = 40°C/W specification and actual board layout.
Does the LT8610AHMSE-5#TRPBF require external feedback resistors to set its output voltage?
No, the LT8610AHMSE-5#TRPBF does not require external feedback resistors. It integrates a precision 12.5MΩ internal feedback divider that fixes the output to 5.00V ±1%. This eliminates resistor tolerance errors, temperature drift, and layout sensitivity-improving long-term stability and simplifying design compared to adjustable regulators.
How does the BIAS pin improve efficiency in the LT8610AHMSE-5#TRPBF?
The BIAS pin on the LT8610AHMSE-5#TRPBF allows the internal 3.4V regulator (INTVCC) to draw current from the 5V output instead of VIN when biased above 3.1V. Since the LT8610AHMSE-5#TRPBF outputs 5V, connecting BIAS to VOUT reduces input-side conduction losses-especially beneficial at light loads and high input voltages-boosting overall efficiency by up to 3% at 100mA.
What is the purpose of the exposed pad (Pin 17) on the LT8610AHMSE-5#TRPBF package?
The exposed pad (Pin 17) on the LT8610AHMSE-5#TRPBF is electrically and thermally connected to GND. It must be soldered to a PCB copper pour to achieve the specified θJC(PAD) = 10°C/W thermal resistance. This pad is critical for dissipating heat in high-current or high-ambient-temperature applications and also serves as an EMI shield for the internal power switches.
Can the LT8610AHMSE-5#TRPBF synchronize to an external clock, and how is it configured?
Yes, the LT8610AHMSE-5#TRPBF can synchronize to an external clock via the SYNC pin (Pin 1). To enable synchronization, apply a logic-compatible square wave (0.8V–2.4V thresholds) to SYNC while ensuring the external frequency falls within the 200kHz–2.2MHz range. When synchronized, the LT8610AHMSE-5#TRPBF operates in pulse-skipping mode with aligned SW transitions-reducing beat frequencies and improving EMI predictability.
LT8610AHMSE-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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT8610AHMSE-5#TRPBF FAQ
1.How can I place an order for LT8610AHMSE-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610AHMSE-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 LT8610AHMSE-5#TRPBF reliable?
The price and inventory of LT8610AHMSE-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 LT8610AHMSE-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610AHMSE-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610AHMSE-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610AHMSE-5#TRPBF?
LT8610AHMSE-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610AHMSE-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 LT8610AHMSE-5#TRPBF?
For technical support, including LT8610AHMSE-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610AHMSE-5#TRPBF requirements.
6.How does Aetrix verify that LT8610AHMSE-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610AHMSE-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 LT8610AHMSE-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610AHMSE-5#TRPBF?
All LT8610AHMSE-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610AHMSE-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 LT8610AHMSE-5#TRPBF part is unused and in its original packaging.
Return procedure for LT8610AHMSE-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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