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Analog Devices Inc. LT8610ACIMSE-1#TRPBF
- Part No.:
- LT8610ACIMSE-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610ACIMSE-1#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,616
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Product details
Overview
LT8610ACIMSE-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 (1.5MHz–2.2MHz). It delivers stable 3.3V/5V power in automotive infotainment and industrial control systems where low standby power and fast transient response are critical.
For engineers reviewing the LT8610ACIMSE-1#TRPBF datasheet, LT8610ACIMSE-1#TRPBF pinout, LT8610ACIMSE-1#TRPBF application, or LT8610ACIMSE-1#TRPBF equivalent, key selection criteria include its AEC-Q100 qualification, soft-start on dropout recovery, ±8% power-good accuracy, and TR/SS-controlled output tracking-essential for multi-rail sequencing and noise-sensitive applications.
Technical Context
The LT8610ACIMSE-1#TRPBF implements constant-frequency current-mode control with internal compensation tuned for 1.5–2.2MHz switching, enabling compact 2MHz designs with improved transient response over the LT8610AC. Its dedicated TR/SS discharge circuit actively regulates the soft-start pin to FB voltage during dropout exit, suppressing output overshoot.
It features synchronized Burst Mode operation (2.5µA IQ), programmable frequency via RT resistor, 30ns minimum on-time, and dual-supply biasing (VIN or BIAS ≥3.1V) to reduce losses. The PG flag asserts when VOUT is within ±8% of regulation and remains valid down to VIN = 3.0V, independent of EN/UV state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - supports wide automotive battery transients and industrial 24V/36V rails without pre-regulation |
| Quiescent Current | 2.5µA at no load - enables >1-year battery life in always-on automotive modules |
| Feedback Reference | 0.800V ±6mV - allows precise low-VOUT regulation (e.g., 1.2V with 1% resistors) and reduces divider current loss |
| Switching Frequency | 1.5MHz to 2.2MHz - enables use of small 2.2µH inductors and <10mm² total solution size |
| Output Current | 3.5A continuous - sustains full load under 125°C junction temperature with proper PCB thermal design |
| Min On-Time | 30ns - supports high VIN-to-low VOUT conversion (e.g., 36V→3.3V at 2MHz) without pulse-skipping instability |
| Power-Good Accuracy | ±8% window around VREF - provides reliable system reset timing without external monitoring circuitry |
Pinout & Package
LT8610ACIMSE-1#TRPBF uses a thermally enhanced 16-lead MSOP package with exposed pad (Pin 17) soldered to PCB ground for θJC(PAD) = 10°C/W. Pin count and layout match industry-standard MSOP-16 footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock input | Enables synchronization to external source or forces pulse-skipping mode; must not be left floating |
| TR/SS (2) | Soft-start/tracking control | Programs output ramp rate via capacitor; discharges to FB during dropout recovery to suppress overshoot |
| RT (3) | Frequency programming | Resistor to GND sets switching frequency (1.5–2.2MHz); value determines loop bandwidth and EMI profile |
| EN/UV (4) | Enable/undervoltage lockout | Hysteretic threshold (1.015V rise / 0.97V fall) enables input brownout protection and controlled startup |
| VIN (5,6) | Main power input | 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 unpopulated or grounded per layout guidelines |
| GND (8) | Analog/digital ground | Return path for bottom switch and control circuitry; tied to exposed pad (Pin 17) for thermal and EMI performance |
| SW (9,10,11) | Power switch node | High-current switched node connecting to inductor and BST capacitor; requires minimal PCB area to limit EMI |
| BST (12) | Bootstrap supply | Drives top MOSFET gate; requires 0.1µF ceramic capacitor placed adjacent to IC |
| INTVCC (13) | Internal 3.4V regulator output | Bypassed with ≥1µF ceramic; supplies internal logic; draws current 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 stability (±8%) and faults; valid down to VIN = 3.0V regardless of EN/UV state |
| FB (16) | Feedback reference input | Regulated to 0.800V; connects to resistor divider tap; requires 4.7–10pF phase-lead capacitor to VOUT |
| GND (17) | Exposed thermal pad | Mandatory solder connection to PCB ground plane; primary thermal path for 125°C operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade I | Qualified for –40°C to +125°C junction operation - meets automotive reliability requirements without derating |
| Dropout Recovery Soft-Start | TR/SS pin actively clamped to FB during brownout exit - eliminates 100–200mV overshoot common in fast-recovery buck converters |
| Ultralow IQ Burst Mode | 2.5µA input current at no load - extends battery runtime in telematics, ADAS sensors, and always-on ECUs |
| High-Frequency Internal Compensation | Optimized for 1.5–2.2MHz - achieves 2× faster load transient response vs LT8610AC at same output capacitance |
| BIAS Pin Efficiency Boost | Draws internal supply from VOUT instead of VIN when VOUT ≥3.3V - cuts no-load power loss by up to 40% |
| Robust PG Flag | Valid at VIN ≥3.0V and independent of EN/UV - enables reliable power sequencing in multi-rail systems |
Applications
| Automotive Infotainment | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Powering DSPs, FPGAs, and display controllers in head units with cold-crank (4.5V) and load-dump (42V) tolerance. IC Role / Device Role / Timing Role: Primary 3.3V/5V buck converter delivering 3.5A with AEC-Q100 compliance and ±8% PG accuracy. Use Value: 2.5µA quiescent current enables <100µA system standby; 30ns min on-time supports 36V→3.3V conversion at 2MHz. | Use Scenario: Regulating 5V for isolated CAN/RS-485 transceivers and analog front-ends in factory automation controllers. IC Role / Device Role / Timing Role: High-efficiency, low-noise DC/DC stage with programmable frequency to avoid EMI bands near 1–2MHz ISM allocations. Use Value: 1.5–2.2MHz range avoids AM radio band; TR/SS tracking ensures clean power-up of isolated data interfaces. |
| GSM Base Station RF Power Amplifiers | Medical Portable Diagnostic Devices |
Use Scenario: Supplying 5V bias to GaN RF power amplifiers requiring fast transient response and low ripple under pulsed loads. IC Role / Device Role / Timing Role: Synchronous buck delivering 3.5A with 200mV dropout at 1A and <200mVpp ripple at 1.5A burst load. Use Value: Internal compensation enables <50µs recovery from 1.5A→3.5A load steps; BIAS pin reduces thermal stress at full load. | Use Scenario: Battery-powered ultrasound or ECG devices needing ultra-low standby power and precise 1.8V/3.3V rails. IC Role / Device Role / Timing Role: Main system regulator with soft-start, PG flag, and 0.80V reference for accurate low-VOUT generation. Use Value: 2.5µA IQ extends lithium coin-cell life to >18 months; ±8% PG enables safe microcontroller wake-up sequencing. |
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 |
|---|---|---|---|
| LT8610ACIMSE#TRPBF | Same package and pinout; 200kHz–2.2MHz frequency range; no dropout-recovery soft-start; standard compensation | Suitable for non-critical 12V→5V/3.3V conversion where overshoot during brownout is acceptable | Select when cost sensitivity outweighs need for fast transient recovery and 2.5µA IQ is sufficient |
| MPQ4433AGL-A-Z | 3.8V–60V input; 3.5A; 17µA IQ; no SYNC or TR/SS; QFN-16; no AEC-Q100 | Targeted at industrial/commercial 48V systems; lacks automotive qualification and advanced sequencing features | Choose for higher VIN applications where AEC-Q100 and ultralow IQ are not required |
Compared with LT8610ACIMSE#TRPBF, the LT8610ACIMSE-1#TRPBF adds dropout-recovery soft-start and high-frequency compensation for tighter transient control, while MPQ4433AGL-A-Z offers wider VIN but sacrifices IQ, PG accuracy, and automotive qualification-making LT8610ACIMSE-1#TRPBF optimal for safety-critical, battery-sensitive automotive designs.
Availability
LT8610ACIMSE-1#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC I/O modules, and medical portable diagnostic devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT8610ACIMSE-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.
The LT8610AC/LT8610AC-1 product line delivers ultralow-quiescent-current synchronous buck regulators for automotive and industrial applications demanding high efficiency at light loads, robust transient response, and AEC-Q100 reliability.
FAQ
What is the guaranteed operating temperature range for LT8610ACIMSE-1#TRPBF?
The LT8610ACIMSE-1#TRPBF is specified for –40°C to +125°C junction temperature and is AEC-Q100 Grade I qualified. This rating is guaranteed across the full range, with thermal performance validated using θJC(PAD) = 10°C/W and mandatory soldering of the exposed pad (Pin 17) to PCB ground.
How does the TR/SS pin function differ between LT8610ACIMSE-1#TRPBF and LT8610ACIMSE#TRPBF?
The LT8610ACIMSE-1#TRPBF adds an active TR/SS discharge circuit that pulls the TR/SS pin to the FB voltage during dropout or brownout conditions, enabling automatic soft-start upon recovery and reducing output overshoot. The LT8610ACIMSE#TRPBF lacks this feature and relies solely on external capacitor programming for startup ramp rate.
Can LT8610ACIMSE-1#TRPBF operate with input voltage below 3.0V?
No. The absolute minimum input voltage for LT8610ACIMSE-1#TRPBF is 3.0V, with typical operation starting at 2.6V (per electrical characteristics table). Below 3.0V, the device cannot maintain regulation or guarantee PG flag validity, and the internal UVLO may disable operation.
What is the purpose of the BIAS pin on LT8610ACIMSE-1#TRPBF, and how should it be connected?
The BIAS pin on LT8610ACIMSE-1#TRPBF supplies internal circuitry when biased ≥3.1V, reducing VIN current draw and improving light-load efficiency. For VOUT ≥3.3V, tie BIAS directly to VOUT; for lower outputs, connect to a stable ≥3.3V rail with 1µF local bypass capacitance.
Does LT8610ACIMSE-1#TRPBF support synchronization to an external clock, and what are the voltage requirements?
Yes, LT8610ACIMSE-1#TRPBF supports external clock synchronization via the SYNC pin (Pin 1). The SYNC input accepts logic-high signals ≥1.4V (rising threshold) and ≤0.8V (falling threshold), with maximum voltage of 6V. It must not be left floating and requires a defined logic level or clock source to enable synchronization or pulse-skipping mode.
LT8610ACIMSE-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
LT8610ACIMSE-1#TRPBF FAQ
1.How can I place an order for LT8610ACIMSE-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610ACIMSE-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 LT8610ACIMSE-1#TRPBF reliable?
The price and inventory of LT8610ACIMSE-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 LT8610ACIMSE-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610ACIMSE-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610ACIMSE-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610ACIMSE-1#TRPBF?
LT8610ACIMSE-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610ACIMSE-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 LT8610ACIMSE-1#TRPBF?
For technical support, including LT8610ACIMSE-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610ACIMSE-1#TRPBF requirements.
6.How does Aetrix verify that LT8610ACIMSE-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610ACIMSE-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 LT8610ACIMSE-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610ACIMSE-1#TRPBF?
All LT8610ACIMSE-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610ACIMSE-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 LT8610ACIMSE-1#TRPBF part is unused and in its original packaging.
Return procedure for LT8610ACIMSE-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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