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Analog Devices Inc. LT8610AHMSE-3.3#TRPBF
- Part No.:
- LT8610AHMSE-3.3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610AHMSE-3.3#TRPBF.pdf
- Description:
- IC REG BUCK 3.3V 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,280
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Product details
Overview
LT8610AHMSE-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 across –40°C to 150°C junction temperature, features ultralow-noise Burst Mode® operation, and delivers high efficiency in automotive power supplies, GSM transceivers, and industrial sensors.
For engineers reviewing the LT8610AHMSE-3.3#TRPBF datasheet, LT8610AHMSE-3.3#TRPBF pinout, LT8610AHMSE-3.3#TRPBF application, or LT8610AHMSE-3.3#TRPBF equivalent, this page provides verified technical context, package mapping, real-world application cards, and validated alternative parts for AEC-Q100-compliant 3.3V/3.5A DC/DC design.
Technical Context
The LT8610AHMSE-3.3#TRPBF implements constant-frequency current-mode control with internal 0.97V reference and programmable switching frequency (200kHz–2.2MHz via RT pin). Its monolithic architecture integrates top and bottom NMOS power switches with 120mΩ and 65mΩ on-resistances respectively, enabling high-efficiency regulation from 3.4V to 42V input.
Burst Mode® operation reduces quiescent current to 2.5µA at no load while maintaining ±9% output accuracy; EN/UV pin provides precise 1V threshold shutdown, and PG flag signals VOUT regulation status and fault conditions. The BIAS pin supports external biasing to improve light-load efficiency when VOUT ≥ 3.3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1.5% over full temperature range - eliminates external feedback resistors and ensures stable rail for MCU I/O or sensor interfaces. |
| Max Output Current | 3.5A continuous - supports high-current loads like RF power amplifiers or multi-rail PMICs without external current boosting. |
| Quiescent Current | 2.5µA in Burst Mode® - enables >10-year battery life in always-on automotive telematics or IoT edge nodes. |
| Input Voltage Range | 3.4V to 42V - accommodates cold-crank (4.5V) and load-dump (40V) transients in 12V/24V automotive systems. |
| Min On-Time | 30ns - allows high step-down ratios (e.g., 42V→3.3V at 2MHz) without pulse-skipping instability. |
| Thermal Rating | Junction temp up to 150°C - qualified per AEC-Q100 Grade H for under-hood applications without derating. |
| EMI Performance | Integrated spread-spectrum and fast 30ns switch transitions - reduces peak EMI by >10dB versus legacy regulators in CISPR 25 Class 5 layouts. |
Pinout & Package
LT8610AHMSE-3.3#TRPBF uses a thermally enhanced 16-lead MSOP package with exposed GND pad (Pin 17), θJA = 40°C/W. The package supports high-power density layouts and requires soldering of the exposed pad to PCB ground plane for thermal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock synchronization input | Ground for low-ripple Burst Mode; tie to logic high or external clock for pulse-skipping or sync operation - disables frequency foldback when driven. |
| TR/SS (2) | Soft-start and tracking control | Capacitor-programmed voltage ramp rate during startup; internal 2.2µA pull-up enables simple soft-start timing - prevents inrush into large output caps. |
| RT (3) | Switching frequency programming | Resistor-to-ground sets fSW from 200kHz to 2.2MHz - enables optimization for size (high f) or efficiency (low f) in space-constrained designs. |
| EN/UV (4) | Enable and input undervoltage lockout | 1.00V rising threshold with 40mV hysteresis - provides clean system-level power sequencing and brown-out protection. |
| VIN (5,6) | Main input power supply | Dual pins reduce IR drop and loop inductance - must be tied together and bypassed locally with low-ESR ceramic capacitor. |
| NC (7) | No connect | Not internally bonded - leave unconnected; no routing or copper required. |
| GND (8) | Power and signal ground return | Return path for bottom switch and control circuitry - must be connected to exposed pad (Pin 17) and input/output capacitor negatives. |
| VOUT (16) | Regulated 3.3V output | Fixed-output pin with internal 14.3MΩ feedback divider - eliminates external resistor network and associated leakage errors. |
| PG (15) | Power good open-drain flag | Asserts high when VOUT is within ±9% of 3.3V and no faults present - drives microcontroller reset or system enable logic directly. |
| BIAS (14) | Internal regulator auxiliary supply | Tie to VOUT to reduce VIN current draw and improve light-load efficiency - mandatory for optimal 2.5µA IQ performance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade H qualification | Validated for automotive under-hood use up to 150°C junction temperature - eliminates need for external thermal derating analysis. |
| Ultralow 2.5µA quiescent current | Enables >10-year battery life in always-on vehicle trackers and remote sensors - measured at 12VIN→3.3VOUT, no load. |
| 30ns minimum on-time | Supports 42V→3.3V conversion at 2MHz without duty-cycle limitation - enables compact 2.2µH inductor and small footprint. |
| Integrated 14.3MΩ feedback divider | Eliminates external resistors and their leakage paths - preserves nanoscale IQ and improves long-term output voltage stability. |
| Robust overload protection | Safely tolerates inductor saturation and sustains 3.5A continuous output even during sustained overload - no latch-off or thermal shutdown below 150°C. |
Applications
| Automotive Infotainment Power | GSM/GPRS Transceiver Supply |
|---|---|
Use Scenario: Powering display controllers, audio codecs, and touch processors in head units with cold-crank and load-dump immunity. IC Role / Device Role / Timing Role: Primary 3.3V buck converter delivering regulated rail with <10mVP-P ripple and fast transient response to bursty CPU loads. Use Value: Maintains system uptime during 4.5V cold-crank events and suppresses EMI to meet CISPR 25 Class 5 without added filtering. | Use Scenario: Supplying PA stages and baseband ICs in cellular modules operating across 900/1800/1900MHz bands. IC Role / Device Role / Timing Role: High-efficiency 3.3V source with 2.5µA IQ enabling extended sleep mode between data transmissions. Use Value: Extends battery life by >30% versus standard buck converters in LTE-M/NB-IoT trackers with 10s–1hr wake intervals. |
| Industrial Sensor Node | Rail-to-Rail Signal Chain Bias |
Use Scenario: Powering MEMS accelerometers, temperature sensors, and wireless SoCs in explosion-proof field transmitters. IC Role / Device Role / Timing Role: Isolated 3.3V supply with wide-input range and AEC-Q100 reliability for hazardous-area certifications. Use Value: Survives 42V surges per IEC 61000-4-5 and maintains regulation down to 3.4V input - no external UVLO needed. | Use Scenario: Generating precision 3.3V bias for ADC references, op-amp rails, and DAC outputs in test equipment. IC Role / Device Role / Timing Role: Low-noise, low-drift power source with ±1.5% output tolerance and <10mVP-P ripple at 100kHz. Use Value: Enables 16-bit ADC accuracy without post-regulation LDO - reduces BOM count and thermal overhead. |
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-3.3#TRPBF | Same package, 150°C rating, but improved light-load efficiency (91% vs 82% at 1mA) with higher output ripple in Burst Mode. | Better suited for ultra-low-power sleep modes where ripple can be filtered; less ideal for noise-sensitive analog rails. | Select AB variant when >10-year battery life is critical and output capacitance can be increased to suppress ripple. |
| LM61480RHFR | 42V, 8A, 15µA IQ, 50ns min on-time, 16-pin WQFN - higher current, higher IQ, larger package, no AEC-Q100 grade. | Targeted at industrial PLCs and motor drives requiring >3.5A, not automotive-qualified; lacks integrated BIAS optimization. | Choose LM61480 for higher current needs in non-automotive settings; avoid if AEC-Q100 or sub-µA IQ is required. |
Compared with LT8610ABHMSE-3.3#TRPBF, the LT8610AHMSE-3.3#TRPBF offers lower output ripple and simpler EMI filtering but sacrifices ~9% light-load efficiency; versus LM61480RHFR, it provides automotive qualification and 1/6 the quiescent current at the cost of 4.5A lower output capability.
Availability
LT8610AHMSE-3.3#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment systems, GSM transceiver modules, and industrial sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT8610AHMSE-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 series was designed specifically for high-reliability automotive and industrial DC/DC conversion, emphasizing ultralow IQ, wide input range, and AEC-Q100 compliance without external components.
FAQ
What is the maximum junction temperature rating for LT8610AHMSE-3.3#TRPBF?
The LT8610AHMSE-3.3#TRPBF is rated for operation up to 150°C junction temperature and is qualified per AEC-Q100 Grade H. This specification is guaranteed across the full –40°C to 150°C operating junction temperature range, making it suitable for under-hood automotive applications where ambient temperatures exceed 105°C.
Does LT8610AHMSE-3.3#TRPBF require external feedback resistors?
No, the LT8610AHMSE-3.3#TRPBF does not require external feedback resistors. It integrates an internal 14.3MΩ resistor divider that fixes the output voltage at 3.3V, eliminating external components, reducing board area, and removing resistor leakage paths that degrade ultralow quiescent current performance.
How does the BIAS pin improve efficiency in LT8610AHMSE-3.3#TRPBF?
The BIAS pin in LT8610AHMSE-3.3#TRPBF allows the internal 3.4V regulator to draw current from VOUT instead of VIN when VOUT ≥ 3.3V. This reduces input supply current, especially at light loads, and is essential to achieve the specified 2.5µA quiescent current - tying BIAS to VOUT is mandatory for optimal IQ performance.
What is the function of the PG pin on LT8610AHMSE-3.3#TRPBF?
On the LT8610AHMSE-3.3#TRPBF, the PG (Power Good) pin is an open-drain output that asserts high when the VOUT pin reaches and maintains regulation within ±9% of 3.3V and no fault conditions (e.g., overtemperature or undervoltage) are present. It remains valid as long as VIN exceeds 3.4V, regardless of EN/UV state.
Can LT8610AHMSE-3.3#TRPBF synchronize to an external clock?
Yes, the LT8610AHMSE-3.3#TRPBF supports external clock synchronization via the SYNC pin (Pin 1). When driven with a logic-compatible square wave between 200kHz and 2.2MHz, the device aligns its switching edges to the external clock and operates in pulse-skipping mode - enabling deterministic EMI reduction and multi-phase interleaving in complex power systems.
LT8610AHMSE-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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT8610AHMSE-3.3#TRPBF FAQ
1.How can I place an order for LT8610AHMSE-3.3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610AHMSE-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 LT8610AHMSE-3.3#TRPBF reliable?
The price and inventory of LT8610AHMSE-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 LT8610AHMSE-3.3#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610AHMSE-3.3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610AHMSE-3.3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610AHMSE-3.3#TRPBF?
LT8610AHMSE-3.3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610AHMSE-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 LT8610AHMSE-3.3#TRPBF?
For technical support, including LT8610AHMSE-3.3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610AHMSE-3.3#TRPBF requirements.
6.How does Aetrix verify that LT8610AHMSE-3.3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610AHMSE-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 LT8610AHMSE-3.3#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610AHMSE-3.3#TRPBF?
All LT8610AHMSE-3.3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610AHMSE-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 LT8610AHMSE-3.3#TRPBF part is unused and in its original packaging.
Return procedure for LT8610AHMSE-3.3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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