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Analog Devices Inc. LT8610ACIMSE-1#PBF
- Part No.:
- LT8610ACIMSE-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610ACIMSE-1#PBF.pdf
- Description:
- IC REG BUCK ADJ 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:101
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Product details
Overview
LT8610ACIMSE-1#PBF from Analog Devices is a 42V, 3.5A synchronous step-down regulator with 2.5µA quiescent current, 0.80V feedback reference, 3V minimum input voltage, and internal compensation optimized for high-frequency operation (1.5–2.2MHz). It serves as the primary power conversion stage in automotive infotainment and industrial control systems requiring ultralow IQ and fast transient response.
For engineers reviewing the LT8610ACIMSE-1#PBF datasheet, LT8610ACIMSE-1#PBF pinout, LT8610ACIMSE-1#PBF application, or LT8610ACIMSE-1#PBF equivalent, key selection criteria include its 30ns minimum on-time, ±8% power-good accuracy, soft-start-on-exit-from-dropout feature, and AEC-Q100 qualification for automotive use.
Technical Context
The LT8610ACIMSE-1#PBF employs constant-frequency current-mode control with an RT-programmable oscillator (1.5–2.2MHz), internal 0.80V reference, and synchronized top/bottom NMOS switches. Its proprietary internal compensation network increases loop bandwidth versus the LT8610AC, enabling improved transient response at 2MHz switching.
It integrates Burst Mode® operation (2.5µA IQ), programmable soft-start via TR/SS pin, external clock synchronization (SYNC), and dropout recovery with automatic TR/SS discharge to suppress output overshoot. The BIAS pin enables efficiency optimization by sourcing INTVCC from VOUT ≥3.3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - supports wide-range automotive battery and industrial DC bus inputs without pre-regulation |
| Quiescent Current | 2.5µA at no load - enables >1-year battery life in always-on automotive modules |
| Feedback Reference | 0.800V ±0.006V - allows precise low-output-voltage regulation (e.g., 1.2V @ 0.8V ref + resistor divider) |
| Switching Frequency | 1.5MHz to 2.2MHz - enables compact 2.2µH inductors and <10mm² solution size |
| Max Output Current | 3.5A continuous - delivers sufficient headroom for 2.5A core logic rails with thermal margin |
| Min On-Time | 30ns - supports high VIN-to-VOUT ratios (e.g., 24V→3.3V) at 2MHz without pulse skipping |
| Power-Good Accuracy | ±8% of VOUT - provides reliable system reset signaling under line/load transients |
Pinout & Package
LT8610ACIMSE-1#PBF uses a thermally enhanced 16-lead MSOP package with exposed pad (Pin 17 = GND), θJA = 40°C/W. The exposed pad must be soldered to PCB for thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock sync input | Enables deterministic EMI reduction via frequency dithering or fixed-frequency alignment; must not float |
| TR/SS (2) | Soft-start & tracking control | Programs output ramp rate via capacitor; discharges during dropout exit to prevent overshoot (LT8610AC-1 specific) |
| RT (3) | Frequency set resistor | Resistor to GND sets switching frequency (1.5–2.2MHz); determines inductor size and ripple trade-offs |
| 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 input power supply | High-current path for IC bias and top switch; requires local 1µF ceramic bypass close to pins |
| NC (7) | No connect | Internally unconnected; must remain unpopulated or grounded per layout guidelines |
| GND (8) | Signal & power return | Return path for bottom switch and error amplifier; ties to exposed pad (Pin 17) for thermal conduction |
| SW (9,10,11) | Switch node | High dv/dt node connecting internal FETs to inductor and BST capacitor; requires minimal PCB area |
| BST (12) | Bootstrap supply | Drives top FET gate above VIN; requires 0.1µF ceramic capacitor placed adjacent to IC |
| INTVCC (13) | Internal 3.4V regulator output | Bypassed with ≥1µF ceramic; powers control circuitry; 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 input | Regulated to 0.800V; connects to resistor divider tap; requires 4.7–10pF phase-lead capacitor to VOUT |
| GND (17) | Exposed thermal pad | Must be soldered to large copper pour for thermal dissipation and EMI shielding |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 2.5µA IQ in Burst Mode enables >10-year shelf life in battery-backed automotive modules |
| High-frequency optimized compensation | LT8610AC-1's internal compensation enables stable 2MHz operation with <50µs load-step recovery |
| Dropout recovery soft-start | TR/SS discharge circuit actively clamps TR/SS to FB during brownout exit, eliminating output overshoot |
| AEC-Q100 Grade I qualification | Rated for –40°C to +125°C junction temperature - qualified for engine bay and ADAS ECU deployment |
| Improved EMI performance | Fast 30ns min on-time, integrated spread-spectrum SYNC capability, and quiet Burst Mode reduce conducted/radiated noise |
Applications
| Automotive Infotainment Power | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powering 3.3V/2A SoC and DDR memory in head-unit systems with cold-crank (4.5V) and load-dump (42V) conditions. IC Role / Device Role / Timing Role: Primary buck converter delivering regulated 3.3V rail with 2.5µA quiescent current during sleep mode and 3.5A peak capability during boot. Use Value: Eliminates need for external LDO post-regulator; maintains system wake-up readiness over 10-year battery life. | Use Scenario: Generating 5V/3A for isolated RS-485 transceivers and microcontroller in factory-floor PLCs with 24V DC input. IC Role / Device Role / Timing Role: High-efficiency, wide-input buck regulator operating continuously at 75°C ambient with 1.5MHz switching. Use Value: Enables compact heatsinkless design; ±8% PG flag ensures deterministic firmware initialization sequence. |
| GSM Base Station RF Power Amp Bias | Medical Portable Diagnostic Device |
Use Scenario: Providing 5V/2.5A bias supply to GaN RF power amplifiers in small-cell base stations with strict EMI limits. IC Role / Device Role / Timing Role: Synchronized buck converter locked to system clock via SYNC pin to shift noise away from sensitive IF bands. Use Value: Reduces radiated emissions by >10dB at 900MHz/1800MHz bands versus unsynchronized operation. | Use Scenario: Supplying 1.2V/1.8A to FPGA and ADC in handheld ultrasound probe with Li-ion battery (3.0–4.2V) input. IC Role / Device Role / Timing Role: Wide VIN buck converter supporting direct battery input with 3V minimum start-up and 2.5µA sleep current. Use Value: Extends single-charge runtime by 35% versus legacy 3.3V-buck + LDO architecture. |
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#PBF | Same package and pinout; standard compensation (200kHz–2.2MHz range); no dropout-recovery soft-start | Lacks TR/SS discharge circuit; slower transient recovery after brownout; lower bandwidth loop | Select when 2MHz operation is not required and cost sensitivity outweighs overshoot suppression needs |
| MPQ4420AGL-A-Z | 3.3–36V input, 2A max, 2.2µA IQ, but only 0.8V ref and no SYNC or PG; QFN-10 package | No power-good flag, no synchronization, smaller current rating, different footprint | Select for space-constrained non-automotive applications where PG and SYNC are unnecessary |
Compared with LT8610ACIMSE#PBF, the LT8610ACIMSE-1#PBF delivers superior transient immunity during input brownout and tighter regulation at 2MHz, while MPQ4420AGL-A-Z offers lower cost and smaller size at the expense of fault signaling and frequency control.
Availability
LT8610ACIMSE-1#PBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLCs, and medical portable diagnostics requiring stable component supply, AEC-Q100 compliance, and ultralow quiescent current performance.
Supply support for LT8610ACIMSE-1#PBF 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 high-efficiency, ultralow-IQ synchronous buck regulators engineered for automotive and industrial applications demanding robustness across wide input ranges and extreme temperature environments.
FAQ
What is the minimum input voltage supported by the LT8610ACIMSE-1#PBF?
The LT8610ACIMSE-1#PBF supports a minimum input voltage of 3.0V, verified across the full –40°C to +125°C operating junction temperature range. This enables direct operation from single-cell Li-ion batteries and automotive cold-crank conditions without auxiliary boost stages. The absolute maximum rating for VIN is 42V, accommodating load-dump transients.
How does the LT8610ACIMSE-1#PBF achieve 2.5µA quiescent current?
The LT8610ACIMSE-1#PBF achieves 2.5µA quiescent current through Burst Mode® operation, where internal control circuitry shuts down between energy pulses to the output capacitor. During sleep periods, only essential bias currents remain active. This behavior is confirmed in the Electrical Characteristics table (VIN quiescent current = 2.5µA at VEN/UV = 2V, no switching, VSYNC = 0V).
Does the LT8610ACIMSE-1#PBF require an external compensation network?
No, the LT8610ACIMSE-1#PBF features fully internal compensation optimized for high-frequency operation (1.5–2.2MHz), eliminating the need for external Type II or Type III compensation components. This is explicitly stated in the datasheet: "LT8610AC-1 has internal compensation optimized for high switching frequencies resulting in improved transient response compared to the LT8610AC."
What is the purpose of the TR/SS pin discharge feature unique to the LT8610ACIMSE-1#PBF?
The TR/SS pin discharge feature in the LT8610ACIMSE-1#PBF actively pulls the TR/SS node to the FB voltage during dropout or brownout conditions, ensuring controlled soft-start when regulation resumes. This prevents output voltage overshoot - a documented improvement over the LT8610AC - and is confirmed in the Applications Information section describing "soft-start when exiting dropout or brownout conditions."
Is the LT8610ACIMSE-1#PBF pin-compatible with the LT8610ACIMSE#PBF?
Yes, the LT8610ACIMSE-1#PBF is pin-compatible with the LT8610ACIMSE#PBF: both use identical 16-lead MSOP packages with identical pinouts, thermal pads, and electrical connections. The functional differences (compensation, TR/SS discharge) are internal and do not affect PCB layout or interconnects.
LT8610ACIMSE-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LT8610ACIMSE-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610ACIMSE-1#PBF 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#PBF reliable?
The price and inventory of LT8610ACIMSE-1#PBF 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#PBF is usually 5 days.
3.What payment methods are accepted for LT8610ACIMSE-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610ACIMSE-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610ACIMSE-1#PBF?
LT8610ACIMSE-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610ACIMSE-1#PBF 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#PBF?
For technical support, including LT8610ACIMSE-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610ACIMSE-1#PBF requirements.
6.How does Aetrix verify that LT8610ACIMSE-1#PBF is sourced from the original manufacturer or authorized distributors?
All LT8610ACIMSE-1#PBF 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#PBF meets industry standards.
7.What is the process for return or replacement of LT8610ACIMSE-1#PBF?
All LT8610ACIMSE-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610ACIMSE-1#PBF, 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#PBF part is unused and in its original packaging.
Return procedure for LT8610ACIMSE-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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