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Analog Devices Inc. LT8610AHMSE#TRPBF
- Part No.:
- LT8610AHMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610AHMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,109
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Product details
Overview
LT8610AHMSE#TRPBF from Analog Devices is a 42V, 3.5A synchronous step-down regulator with 2.5µA quiescent current in Burst Mode, 30ns minimum on-time, and AEC-Q100 qualification for automotive applications. It delivers fixed 3.3V or 5V output in a thermally enhanced 16-lead MSOP package with –40°C to 150°C junction temperature rating.
For engineers reviewing the LT8610AHMSE#TRPBF datasheet, LT8610AHMSE#TRPBF pinout, LT8610AHMSE#TRPBF application, or LT8610AHMSE#TRPBF equivalent, key selection criteria include ultralow IQ regulation under light loads, fast transient response in automotive power rails, EMI-optimized switching behavior, and thermal robustness up to 150°C junction temperature.
Technical Context
The LT8610AHMSE#TRPBF implements constant-frequency current-mode control with internal 0.97V reference and programmable oscillator (200kHz–2.2MHz via RT pin). Its synchronous rectification uses top/bottom NMOS switches with 120mΩ/65mΩ on-resistance and 6.7A/4.3A current limits respectively.
Burst Mode operation enables 2.5µA input current at no load while maintaining ±9% output regulation accuracy; the EN/UV pin provides accurate 1.0V threshold undervoltage lockout, and PG flag signals fault conditions and VOUT stability within ±9% of setpoint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.4V to 42V - supports wide automotive battery transients including cold-crank and load-dump conditions. |
| Max Output Current | 3.5A - sufficient for powering infotainment SoCs, ADAS sensors, or multi-rail microcontrollers. |
| Quiescent Current | 2.5µA - enables always-on systems (e.g., telematics, alarm controllers) to meet ISO 16750-2 standby current limits. |
| Min On-Time | 30ns - allows high step-down ratios (e.g., 42V→3.3V) at 2MHz switching without pulse-skipping instability. |
| Output Ripple | <10mVP-P - measured at 5VOUT with 4.7µH inductor and 47µF×2 output capacitance, critical for noise-sensitive analog circuits. |
| Junction Temp Range | –40°C to 150°C - qualified per AEC-Q100 Grade H, enabling placement near hot engine compartments or powertrain ECUs. |
| Switching Frequency | 200kHz to 2.2MHz - adjustable via RT resistor; higher frequencies reduce inductor size but increase switching losses. |
Pinout & Package
LT8610AHMSE#TRPBF uses a 16-lead plastic MSOP package with exposed thermal pad (Pin 17 = GND), θJA = 40°C/W, θJC(PAD) = 10°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 synchronization input | Enables EMI reduction via frequency dithering or synchronization to system clock; tied low for low-ripple Burst Mode. |
| TR/SS (2) | Soft-start and tracking control | Capacitor-programmed voltage ramp controls startup slew rate; also enables output voltage tracking during sequencing. |
| RT (3) | Frequency programming resistor | Resistor to GND sets switching frequency from 200kHz to 2.2MHz; determines inductor size and efficiency trade-off. |
| EN/UV (4) | Enable and input undervoltage lockout | 1.0V rising threshold ensures reliable startup above battery brownout; hysteresis prevents chatter near threshold. |
| VIN (5,6) | Main input power supply | Dual pins reduce IR drop and improve thermal path; require local 1µF ceramic bypass close to pins. |
| NC (7) | No connect | Internally unconnected; must remain floating or grounded per layout guidelines. |
| GND (8) | Power and signal ground return | Return path for bottom switch and control circuitry; must be tied to exposed pad (Pin 17) with low-inductance connection. |
| SW (9,10,11) | Switch node output | High-current connection to inductor and BST capacitor; requires minimal PCB area to reduce EMI and ringing. |
| BST (12) | Bootstrap capacitor connection | 0.1µF ceramic capacitor between BST and SW provides gate drive voltage > VIN for top NMOS switch. |
| INTVCC (13) | Internal 3.4V regulator bypass | Requires ≥1µF low-ESR ceramic capacitor; supplies internal logic and drivers; sourced from BIAS if VBIAS > 3.1V. |
| BIAS (14) | Efficiency-optimized bias supply | When tied to VOUT ≥3.3V, reduces VIN current draw and improves light-load efficiency by powering INTVCC from output rail. |
| PG (15) | Power good open-drain flag | Signals VOUT within ±9% of regulation and absence of faults; valid when VIN > 3.4V regardless of EN/UV state. |
| VOUT (16) | Fixed-output voltage terminal | For LT8610AHMSE#TRPBF, this pin is internally connected to 3.3V or 5V fixed regulator (model-dependent); no external feedback required. |
| GND (17) | Exposed thermal pad | Electrically GND and primary thermal path; must be soldered to large copper pour for 150°C operation. |
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 <100µA total system standby current in battery-powered always-on modules without compromising regulation. |
| 30ns minimum on-time | Supports direct 42V-to-3.3V conversion at 2MHz, eliminating intermediate stages and reducing BOM count. |
| Integrated 14.3MΩ or 12.5MΩ feedback divider | Eliminates external resistors for fixed 3.3V/5V outputs, minimizing leakage current and improving light-load IQ. |
| EMI-optimized Silent Switcher® architecture | Reduced switching node dv/dt and symmetric layout minimize radiated emissions without shielding or ferrites. |
| Robust fault protection | Includes overtemperature shutdown, input UVLO, PG fault signaling, and safe inductor saturation tolerance. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powering SoC, DDR memory, and display interface in head-unit or digital cluster with 12V/24V battery input. IC Role / Device Role / Timing Role: Primary 5V/3.3V buck converter delivering regulated power with low ripple and fast transient response to dynamic SoC loads. Use Value: 2.5µA IQ extends vehicle battery life during extended parking; 150°C rating allows placement near heat-generating processors. | Use Scenario: Providing stable 3.3V rail to CMOS image sensor and ISP in rear-view or surround-view camera ECU. IC Role / Device Role / Timing Role: High-efficiency, low-noise DC/DC converter ensuring clean power for analog pixel readout and ADC reference. Use Value: <10mVP-P ripple prevents image noise; Burst Mode maintains regulation during sleep states without wake-up latency. |
| Industrial Telematics Gateway | GSM Baseband Power Supply |
Use Scenario: Powering LTE modem, MCU, and CAN transceiver in fleet management gateway operating across wide ambient temperatures. IC Role / Device Role / Timing Role: Main 3.3V supply with AEC-Q100 reliability and input transient tolerance up to 42V. Use Value: 3.4V–42V input range handles ISO 16750-2 load-dump pulses; PG flag enables firmware-controlled power sequencing. | Use Scenario: Delivering 3.3V to GSM/GPRS baseband processor in portable asset trackers with long battery life requirements. IC Role / Device Role / Timing Role: Ultralow-IQ buck regulator maintaining regulation during deep-sleep modes between data transmissions. Use Value: 2.5µA IQ enables >10-year battery life in lithium-thionyl-chloride powered devices with periodic transmission bursts. |
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#TRPBF | Same package and temp grade, but improved light-load efficiency (91% vs 82% at 1mA) with higher output ripple in Burst Mode. | Better suited for applications prioritizing efficiency over ultra-low noise, e.g., non-analog subsystems. | Select LT8610ABHMSE#TRPBF when optimizing for lowest possible power consumption at sub-10mA loads, accepting slightly higher ripple. |
| LM61480QRNXTQ1 | 42V, 8A automotive buck; 15µA IQ; 45ns min on-time; QFN-16 package; no integrated feedback divider for fixed outputs. | Higher current capability and different pinout; requires external feedback network; not pin-compatible. | Choose LM61480QRNXTQ1 only when >3.5A output or different thermal profile (QFN vs MSOP) is required; not a drop-in replacement. |
Compared with LT8610ABHMSE#TRPBF, the LT8610AHMSE#TRPBF trades 9% light-load efficiency for lower output ripple-critical for analog-sensitive loads-while both maintain identical 150°C operation and AEC-Q100 compliance. The LM61480QRNXTQ1 offers higher current but demands redesign due to differing pinout, feedback architecture, and thermal characteristics.
Availability
LT8610AHMSE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and industrial telematics gateways requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LT8610AHMSE#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 quiescent current, high input voltage tolerance, and AEC-Q100 reliability-enabling always-on functionality in harsh environments.
FAQ
What is the maximum junction temperature rating for the LT8610AHMSE#TRPBF?
The LT8610AHMSE#TRPBF is rated for a maximum junction temperature of 150°C and is guaranteed over the full –40°C to 150°C operating junction temperature range per AEC-Q100 Grade H qualification. This enables deployment in high-ambient locations such as engine compartments or near powertrain ECUs where standard 125°C-rated regulators would derate or fail.
Does the LT8610AHMSE#TRPBF require external feedback resistors for fixed 3.3V or 5V output?
No, the LT8610AHMSE#TRPBF does not require external feedback resistors. It integrates internal feedback dividers-14.3MΩ for 3.3V versions and 12.5MΩ for 5V versions-directly connecting to the VOUT pin (Pin 16). This eliminates external components, reduces board space, and minimizes leakage current that would degrade ultralow quiescent current performance.
How does the BIAS pin improve efficiency in the LT8610AHMSE#TRPBF?
The BIAS pin on the LT8610AHMSE#TRPBF allows the internal 3.4V regulator (INTVCC) to draw current from the output rail instead of VIN when VBIAS ≥ 3.1V. When tied to VOUT (e.g., 3.3V or 5V), it reduces input supply current, especially at light loads, thereby improving overall conversion efficiency and lowering thermal stress on the input stage.
What is the purpose of the TR/SS pin on the LT8610AHMSE#TRPBF?
The TR/SS (Track/Soft-Start) pin on the LT8610AHMSE#TRPBF serves dual functions: it programs the output voltage ramp rate during startup via an external capacitor (soft-start), and enables voltage tracking between multiple regulators in power sequencing applications. An internal 2.2µA pull-up current charges the capacitor, allowing precise control of slew rate without external circuitry.
Can the LT8610AHMSE#TRPBF synchronize to an external clock source?
Yes, the LT8610AHMSE#TRPBF can synchronize to an external clock via the SYNC pin (Pin 1). Applying a logic-level clock signal (0.8V–2.4V thresholds) aligns switching edges to the external frequency, enabling EMI reduction through frequency dithering or deterministic timing in synchronized multi-rail systems. When unused, SYNC must be tied low-not left floating-to ensure proper Burst Mode operation.
LT8610AHMSE#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):
- 3.4V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 0.97V
- Voltage - Output (Max):
- 42V
- 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#TRPBF FAQ
1.How can I place an order for LT8610AHMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610AHMSE#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#TRPBF reliable?
The price and inventory of LT8610AHMSE#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#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610AHMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610AHMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610AHMSE#TRPBF?
LT8610AHMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610AHMSE#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#TRPBF?
For technical support, including LT8610AHMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610AHMSE#TRPBF requirements.
6.How does Aetrix verify that LT8610AHMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610AHMSE#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#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610AHMSE#TRPBF?
All LT8610AHMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610AHMSE#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#TRPBF part is unused and in its original packaging.
Return procedure for LT8610AHMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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