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Analog Devices Inc. LT8610ACEMSE#TRPBF
- Part No.:
- LT8610ACEMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610ACEMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,495
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Product details
Overview
LT8610ACEMSE#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, 30ns minimum on-time, and adjustable 200kHz–2.2MHz switching frequency. It operates from 3V to 42V input and delivers regulated output for automotive infotainment power rails.
For engineers reviewing the LT8610ACEMSE#TRPBF datasheet, LT8610ACEMSE#TRPBF pinout, LT8610ACEMSE#TRPBF application, or LT8610ACEMSE#TRPBF equivalent, key selection criteria include ultralow IQ regulation at 12VIN→3.3VOUT, AEC-Q100 qualification, soft-start/tracking via TR/SS pin, and SYNC-enabled external clock synchronization for EMI control.
Technical Context
The LT8610ACEMSE#TRPBF implements constant-frequency current-mode control with internal 0.80V reference and slope compensation. Its 30ns minimum on-time enables high VIN/VOUT ratios (e.g., 42V→3.3V) without pulse-skipping instability.
It features dual supply paths: BIAS pin sourcing >3.1V powers internal circuitry independently of VIN, improving light-load efficiency; INTVCC provides 3.4V regulated bias for gate drivers and control logic, with UVLO at 2.47V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - supports wide automotive battery transients and industrial 24V/36V systems |
| Quiescent Current | 2.5µA at 12VIN→3.3VOUT - enables always-on systems with multi-year battery life |
| Feedback Reference | 0.800V ±6mV - allows precise low-output-voltage regulation with minimal divider current |
| Max Output Current | 3.5A continuous - sustains full load under 125°C junction temperature with proper PCB thermal design |
| Min On-Time | 30ns - enables 42V→3.3V conversion at 2MHz without duty-cycle limitation |
| Switching Frequency | 200kHz to 2.2MHz - programmable via RT resistor for optimal EMI/efficiency trade-off |
| PG Accuracy | ±8% VOUT window - provides reliable power-good signaling for downstream microcontrollers |
Pinout & Package
LT8610ACEMSE#TRPBF uses a thermally enhanced 16-lead MSOP package with exposed pad (Pin 17 = GND). The package has θJA = 40°C/W and requires soldering of the exposed pad to PCB for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock input | Enables synchronization to external source or forces pulse-skipping mode when tied high; must not float |
| TR/SS (2) | Soft-start & tracking control | Capacitor-programmed voltage ramp rate; pulls to FB during dropout to limit overshoot (LT8610AC-1 only) |
| RT (3) | Frequency programming | Resistor-to-GND sets oscillator frequency; 60.4kΩ yields ~700kHz for standard designs |
| EN/UV (4) | Enable & undervoltage lockout | Hysteretic threshold (1.015V rise / 0.97V fall) enables input voltage monitoring and controlled startup |
| VIN (5,6) | Main power input | Supplies top switch and internal circuitry; requires local 1µF ceramic bypass close to pins |
| NC (7) | No connect | Internally unconnected; no external connection required |
| GND (8) | Signal & power return | Return path for bottom switch and analog circuits; ties to exposed pad (Pin 17) |
| SW (9,10,11) | Power switch node | High-current switching node connecting to inductor and BST capacitor; minimize PCB loop area |
| BST (12) | Bootstrap supply | Drives top MOSFET gate; requires 0.1µF ceramic capacitor between BST and SW |
| INTVCC (13) | Internal regulator output | 3.4V supply for gate drivers; bypass with ≥1µF ceramic; not for external loading |
| BIAS (14) | Efficiency-optimized bias | When ≥3.1V applied (e.g., tied to VOUT), reduces VIN current draw and improves light-load efficiency |
| PG (15) | Power-good flag | Open-drain output active-high when VOUT within ±8% of target and no fault conditions detected |
| FB (16) | Feedback reference point | Regulated to 0.800V; connects to resistor divider tap; phase-lead cap (4.7–10pF) recommended |
| GND (17) | Exposed thermal pad | Must be soldered to PCB plane for thermal conduction and EMI reduction; electrically GND |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode | 2.5µA input current at no load enables always-on automotive modules without battery drain |
| 30ns Minimum On-Time | Supports high-step-down ratios (e.g., 42V→3.3V @ 2MHz) without requiring lower-frequency operation |
| AEC-Q100 Qualified | Rated for –40°C to +125°C junction temperature (ACE grade), validated for automotive reliability |
| Programmable Soft-Start | TR/SS pin accepts external capacitor to control output voltage ramp rate and prevent inrush current |
| BIAS Pin Efficiency Boost | Connecting BIAS to VOUT (>3.1V) shifts internal supply from VIN, reducing input current by up to 9.2mA at 1A load |
| SYNC-Enabled EMI Control | External clock synchronization eliminates frequency spreading artifacts and simplifies EMI filter design |
Applications
| Automotive Infotainment Power | GSM Transceiver Supply |
|---|---|
Use Scenario: Powering LCD display controllers and audio codecs in vehicle head units with cold-crank tolerance. IC Role / Device Role / Timing Role: Primary 3.3V/2.5A buck converter delivering stable rail during 3V–42V battery transients. Use Value: 2.5µA IQ extends backup battery life; 30ns on-time ensures regulation during 42V load-dump events. | Use Scenario: Providing clean 3.3V supply to GSM modem ICs in telematics control units. IC Role / Device Role / Timing Role: High-efficiency synchronous buck regulating from 12V vehicle bus to 3.3V RF subsystem rail. Use Value: Burst Mode maintains <10mV ripple at 10mA load; PG flag enables safe modem boot sequencing. |
| Industrial Sensor Hub | Portable Medical Monitor |
Use Scenario: Powering multi-sensor nodes (temperature, pressure, IMU) in battery-operated condition monitoring systems. IC Role / Device Role / Timing Role: Main system regulator converting 24V field bus to 3.3V logic rail with low standby consumption. Use Value: 0.80V reference enables accurate low-VOUT setting; TR/SS pin allows synchronized startup across sensor clusters. | Use Scenario: Supplying FPGA and ADC subsystems in handheld ECG monitors with lithium-polymer battery input. IC Role / Device Role / Timing Role: High-efficiency 5V→3.3V step-down converter supporting USB-powered and battery-powered modes. Use Value: BIAS pin connected to VOUT reduces no-load current to 2.5µA; AEC-Q100 qualification 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 | Higher 0.97V feedback voltage; 3.4V min VIN; same 3.5A/30ns specs | Less suitable for sub-3.4V input systems (e.g., cold-crank); requires higher output voltage for same divider ratio | Select when 0.97V reference simplifies existing 5V/12V designs or when 3.4V+ VIN is guaranteed |
| LT8640SEMTDE#TRPBF | 42V/5A rating; 2.5µA IQ; 25ns min on-time; integrated compensation | Higher current capability and faster switching enable smaller magnetics; different pinout and layout | Choose for >3.5A loads or when 25ns on-time is needed for ultra-high VIN/VOUT ratios |
Compared with LT8610ABEMSE#TRPBF and LT8640SEMTDE#TRPBF, the LT8610ACEMSE#TRPBF uniquely balances ultralow IQ, 3V minimum input, and AEC-Q100 qualification-making it optimal for automotive always-on subsystems where cold-crank operation and battery longevity are critical.
Availability
LT8610ACEMSE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment power supplies, GSM transceiver modules, and industrial sensor hubs requiring stable component supply with AEC-Q100 compliance and long-lifecycle support.
Supply support for LT8610ACEMSE#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 industrial, automotive, communications, and healthcare markets.
The LT8610AC product line delivers high-efficiency, ultralow-quiescent-current synchronous buck regulators optimized for automotive and battery-sensitive applications where cold-crank operation and long standby life are essential.
FAQ
What is the minimum input voltage specification for the LT8610ACEMSE#TRPBF?
The LT8610ACEMSE#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 below 6V. The 3.0V minimum is confirmed across the full –40°C to +125°C operating junction temperature range for the ACE grade variant.
How does the BIAS pin improve efficiency in the LT8610ACEMSE#TRPBF?
The BIAS pin on the LT8610ACEMSE#TRPBF reduces input current draw by sourcing internal circuitry power from VOUT instead of VIN when biased above 3.1V. At 1A load and 3.3V output, this lowers total input current by up to 9.2mA compared to VIN-only operation-directly improving light-load and full-load efficiency in systems where VOUT ≥ 3.3V.
Can the LT8610ACEMSE#TRPBF synchronize to an external clock, and what are the voltage requirements?
Yes, the LT8610ACEMSE#TRPBF supports external clock synchronization via the SYNC pin (Pin 1). The SYNC pin accepts logic-level inputs with falling threshold of 1.1V and rising threshold of 2.0V. It must not be left floating; tie to GND for Burst Mode, to INTVCC or logic high for pulse-skipping mode, or to an external clock source for synchronization.
What is the purpose of the TR/SS pin on the LT8610ACEMSE#TRPBF, and how is it used?
On the LT8610ACEMSE#TRPBF, the TR/SS pin (Pin 2) controls soft-start ramp rate and enables output voltage tracking. A capacitor from TR/SS to GND sets the output slew rate during startup. In the LT8610AC-1 variant, TR/SS also discharges to match FB during dropout to reduce overshoot-but the LT8610ACEMSE#TRPBF is the AC version, so this discharge feature is not present.
Is the LT8610ACEMSE#TRPBF qualified for automotive applications, and what grade does it carry?
Yes, the LT8610ACEMSE#TRPBF carries the ACE grade (–40°C to +125°C junction temperature) and is AEC-Q100 qualified for automotive applications. Its ordering part number suffix "E" denotes the automotive-qualified temperature grade, and it meets stress testing requirements for humidity, temperature cycling, and mechanical shock per AEC-Q100 Rev H.
LT8610ACEMSE#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:
- 200kHz ~ 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#TRPBF FAQ
1.How can I place an order for LT8610ACEMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610ACEMSE#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#TRPBF reliable?
The price and inventory of LT8610ACEMSE#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#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610ACEMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610ACEMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610ACEMSE#TRPBF?
LT8610ACEMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610ACEMSE#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#TRPBF?
For technical support, including LT8610ACEMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610ACEMSE#TRPBF requirements.
6.How does Aetrix verify that LT8610ACEMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610ACEMSE#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#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610ACEMSE#TRPBF?
All LT8610ACEMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610ACEMSE#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#TRPBF part is unused and in its original packaging.
Return procedure for LT8610ACEMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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