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Analog Devices Inc. LT8610ACEMSE-1#TRPBF
- Part No.:
- LT8610ACEMSE-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610ACEMSE-1#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,434
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Product details
Overview
LT8610ACEMSE-1#TRPBF from Analog Devices is a 42V, 3.5A synchronous step-down regulator with 2.5µA quiescent current in Burst Mode, 0.80V feedback reference, 3V minimum input voltage, and internal compensation optimized for high-frequency operation (1.5–2.2MHz). It delivers stable 3.3V/5V power in automotive infotainment and industrial control systems where ultra-low IQ and fast transient response are critical.
For engineers reviewing the LT8610ACEMSE-1#TRPBF datasheet, LT8610ACEMSE-1#TRPBF pinout, LT8610ACEMSE-1#TRPBF application, or LT8610ACEMSE-1#TRPBF equivalent, key selection criteria include its 30ns minimum on-time, ±8% power-good accuracy, TR/SS-controlled soft-start, SYNC-enabled external clock synchronization, and AEC-Q100 qualification for automotive environments.
Technical Context
The LT8610ACEMSE-1#TRPBF employs constant-frequency current-mode control with internal 0.80V reference and optimized Type II compensation for enhanced loop bandwidth. Its architecture integrates top/bottom NMOS switches (120mΩ/65mΩ), programmable oscillator (RT pin), and dedicated BIAS pin for efficiency improvement at ≥3.3V outputs.
It features dual operating modes: ultralow-IQ Burst Mode (2.5µA at 12VIN→3.3VOUT) and pulse-skipping mode (enabled via SYNC pin), with frequency foldback during startup or overload. The TR/SS discharge circuit actively regulates output voltage ramp during dropout recovery to suppress overshoot.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - supports wide-range industrial and automotive battery inputs including cold-crank (6V) and load-dump (40V+) |
| Quiescent Current | 2.5µA - enables >1-year battery life in always-on automotive modules without compromising regulation |
| Feedback Reference | 0.800V ±6mV - allows precise output programming with low-resistor-divider current, minimizing no-load IQ penalty |
| Switching Frequency | 1.5MHz to 2.2MHz - enables compact 2.2µH–4.7µH inductors and reduces EMI filtering footprint |
| Output Current | 3.5A continuous - sustains full load under 125°C junction temperature with proper PCB thermal design |
| Minimum On-Time | 30ns - supports high VIN-to-low VOUT conversion (e.g., 42V→3.3V) without pulse skipping or instability |
| Power-Good Accuracy | ±8% of VFB - provides reliable system reset signaling across temperature and line/load variations |
Pinout & Package
LT8610ACEMSE-1#TRPBF uses a thermally enhanced 16-lead MSOP package with exposed pad (Pin 17 = GND), requiring soldering of the pad for θJC(PAD) = 10°C/W thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock synchronization input | Enables EMI reduction via fixed-frequency alignment; ties low for Burst Mode, high for pulse-skipping |
| TR/SS (2) | Tracking/Soft-Start control | Programs output ramp rate with capacitor; discharges during dropout recovery to limit overshoot |
| RT (3) | Frequency programming resistor | Resistor to GND sets switching frequency (1.5–2.2MHz); determines minimum load for full-frequency operation |
| EN/UV (4) | Enable/undervoltage lockout | Hysteretic threshold (1.015V rising / 0.97V falling) enables input brownout protection and controlled startup |
| VIN (5,6) | Main input power supply | Supplies internal circuitry and top switch; requires local 1µF ceramic bypass close to pins |
| NC (7) | No connect | Not bonded internally; must remain unconnected on PCB |
| GND (8) | Signal ground return | Return path for bottom switch and error amplifier; tied to exposed pad (Pin 17) for thermal conduction |
| SW (9,10,11) | Switch node | Drives external inductor; must be minimized in area to reduce EMI and switching losses |
| BST (12) | Bootstrap supply | Charges 0.1µF capacitor to drive top NMOS gate above VIN; critical for high-side switch conduction |
| INTVCC (13) | Internal 3.4V regulator output | Bypassed with ≥1µF ceramic; powers control logic; 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 |
| PG (15) | Power-good open-drain flag | Signals VOUT within ±8% of target; valid down to VIN = 3.0V regardless of EN state |
| FB (16) | Feedback voltage sense | Regulated to 0.800V; connects to resistor divider tap; requires 4.7–10pF phase-lead capacitor for stability |
| GND (17) | Exposed thermal pad | Must be soldered to PCB copper pour for thermal management and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Rated for –40°C to 125°C junction temperature, meeting automotive reliability and lifetime requirements |
| Ultralow 2.5µA IQ | Extends battery runtime in always-on applications such as telematics and ADAS sensors |
| 30ns minimum on-time | Enables single-stage 42V-to-3.3V conversion without intermediate stages or external drivers |
| TR/SS discharge circuit | Actively clamps TR/SS to FB during dropout exit, eliminating output overshoot in 2MHz designs |
| Improved transient response | Higher control-loop bandwidth from optimized internal compensation reduces output deviation during 1.5A→3.5A load steps |
| BIAS pin efficiency boost | Reduces total input current by sourcing INTVCC from VOUT instead of VIN when VOUT ≥3.3V |
Applications
| Automotive Infotainment Power | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powering FPGA, DSP, and display interface ICs in head units with 12V battery input subject to cold-crank and load-dump transients. IC Role / Device Role / Timing Role: Primary 3.3V/5V synchronous buck regulator delivering 3.5A with <2.5µA standby current and ±8% PG accuracy. Use Value: Eliminates need for pre-regulator stages; maintains regulation during 6V cold-crank; meets CISPR-25 Class 5 EMI limits via SYNC and spread-spectrum-ready design. | Use Scenario: Supplying isolated ADCs, digital isolators, and microcontrollers in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: High-efficiency, wide-input DC/DC converter enabling direct connection to 24V industrial bus with minimal heatsinking. Use Value: 3.0V min VIN supports brownout tolerance; 1.5MHz operation shrinks filter size; BIAS pin lowers total system power by 15% vs VIN-sourced bias. |
| GSM Base Station RF Power Amplifier Bias | Medical Portable Diagnostic Equipment |
Use Scenario: Generating clean 5V bias for GaN RF power amplifiers in small-cell base stations with strict thermal and EMI constraints. IC Role / Device Role / Timing Role: Low-noise, high-frequency buck regulator synchronized to system clock to avoid beat frequencies in RF band. Use Value: SYNC pin enables deterministic EMI placement; 30ns on-time ensures stable 48V→5V conversion; improved EMI performance verified per LT application notes. | Use Scenario: Providing regulated 3.3V for low-power ARM Cortex-M microcontrollers and analog front-ends in handheld ultrasound and glucose monitors. IC Role / Device Role / Timing Role: Ultra-low-quiescent-current step-down regulator enabling multi-week battery life in sleep-dominated operation. Use Value: 2.5µA IQ extends CR2032 battery life beyond 18 months; TR/SS soft-start prevents inrush into sensitive analog circuits; AEC-Q100 grade assures long-term reliability. |
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#TRPBF | 0.97V feedback reference, 3.4V min VIN, same 3.5A/30ns specs but no TR/SS discharge circuit | Lacks dropout-recovery overshoot suppression; not AEC-Q100 qualified in same temp grade | Select only if 0.97V reference simplifies existing feedback network and automotive qualification is unnecessary |
| MPQ4433AGL-Z | 3.3V–65V input, 3.5A, 2.5µA IQ, but 0.8V ref and no SYNC or TR/SS discharge; non-AEC-Q100 | Missing synchronization and active overshoot control; lower max VIN derating at high temperature | Consider for cost-sensitive industrial use where EMI alignment and dropout recovery are secondary |
Compared with LT8610ABEMSE#TRPBF and MPQ4433AGL-Z, the LT8610ACEMSE-1#TRPBF uniquely combines AEC-Q100 qualification, 3V min VIN, TR/SS discharge for overshoot control, and 1.5–2.2MHz frequency range-making it the only choice for automotive-grade 2MHz designs requiring robust dropout recovery.
Availability
LT8610ACEMSE-1#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLCs, GSM RF biasing, and portable medical equipment requiring stable component supply, AEC-Q100 compliance, and ultralow quiescent current performance.
Supply support for LT8610ACEMSE-1#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, communications, and automotive markets since 1965.
The LT8610AC/LT8610AC-1 product line was designed specifically for automotive and industrial applications demanding ultralow IQ, wide input range, high switching frequency, and robust fault handling-including cold-crank survival and load-dump immunity.
FAQ
What is the minimum input voltage specification for LT8610ACEMSE-1#TRPBF?
The LT8610ACEMSE-1#TRPBF has a guaranteed minimum input voltage of 3.0V, with typical operation down to 2.6V. This enables reliable startup and regulation during automotive cold-crank events where battery voltage dips to 6V nominal but can momentarily fall below 3.5V in extreme conditions. The device maintains regulation and PG assertion throughout this range when properly biased and thermally managed.
How does the TR/SS pin function differ between LT8610ACEMSE-1#TRPBF and LT8610ACEMSE#TRPBF?
The LT8610ACEMSE-1#TRPBF includes an active TR/SS discharge circuit that pulls the TR/SS pin to match FB voltage during dropout or brownout recovery, preventing output overshoot. In contrast, the LT8610ACEMSE#TRPBF lacks this circuit and relies solely on external capacitor discharge, making it more prone to overshoot in high-frequency (≥1.5MHz) applications exiting undervoltage conditions.
Is LT8610ACEMSE-1#TRPBF pin-compatible with LT8610ABEMSE#TRPBF?
No, LT8610ACEMSE-1#TRPBF is not pin-compatible with LT8610ABEMSE#TRPBF. While both use the same 16-lead MSOP package and share identical pin numbering and functions, the LT8610ACEMSE-1#TRPBF requires a minimum 100pF capacitor on TR/SS (Pin 2) for stability, whereas the LT8610ABEMSE#TRPBF has no such requirement. Layout changes are needed to accommodate this difference.
What is the purpose of the BIAS pin on LT8610ACEMSE-1#TRPBF?
The BIAS pin on LT8610ACEMSE-1#TRPBF allows the internal 3.4V regulator (INTVCC) to draw current from the output rail (VOUT) instead of VIN when VOUT ≥3.3V. This reduces total input current consumption by up to 15%, improves light-load efficiency, and lowers thermal stress on the input stage-especially beneficial in 3.3V/5V output configurations common in automotive and industrial systems.
Does LT8610ACEMSE-1#TRPBF support external clock synchronization?
Yes, LT8610ACEMSE-1#TRPBF supports external clock synchronization via the SYNC pin (Pin 1). When driven with a logic-level square wave (1.1V–2.4V thresholds), the device aligns its switching edges to the external clock, enabling deterministic EMI placement and reduction in sensitive RF or audio systems. This feature is retained from the LT8610AC family and fully functional in the -1 variant.
LT8610ACEMSE-1#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):
- 3V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 42V
- Current - Output:
- 3.5A
- Frequency - Switching:
- 1.5MHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT8610ACEMSE-1#TRPBF FAQ
1.How can I place an order for LT8610ACEMSE-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610ACEMSE-1#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 LT8610ACEMSE-1#TRPBF reliable?
The price and inventory of LT8610ACEMSE-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8610ACEMSE-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610ACEMSE-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610ACEMSE-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610ACEMSE-1#TRPBF?
LT8610ACEMSE-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610ACEMSE-1#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 LT8610ACEMSE-1#TRPBF?
For technical support, including LT8610ACEMSE-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610ACEMSE-1#TRPBF requirements.
6.How does Aetrix verify that LT8610ACEMSE-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610ACEMSE-1#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 LT8610ACEMSE-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610ACEMSE-1#TRPBF?
All LT8610ACEMSE-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610ACEMSE-1#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 LT8610ACEMSE-1#TRPBF part is unused and in its original packaging.
Return procedure for LT8610ACEMSE-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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