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Analog Devices Inc. LT8610ACEMSE#PBF
- Part No.:
- LT8610ACEMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610ACEMSE#PBF.pdf
- Description:
- IC REG BUCK ADJ 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:13,557
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Product details
Overview
LT8610ACEMSE#PBF 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 AEC-Q100 qualification for automotive power supplies. It operates from 3V to 42V input and delivers regulated output in compact MSOP-16 with exposed thermal pad.
For engineers reviewing the LT8610ACEMSE#PBF datasheet, LT8610ACEMSE#PBF pinout, LT8610ACEMSE#PBF application, or LT8610ACEMSE#PBF equivalent, key selection considerations include ultralow IQ regulation at 12VIN→3.3VOUT, synchronization capability via SYNC pin, soft-start/tracking control via TR/SS, ±8% power-good flag accuracy, and 1.015V EN threshold with 50mV hysteresis.
Technical Context
The LT8610ACEMSE#PBF implements constant-frequency current-mode control with internal 0.80V reference and programmable oscillator (200kHz–2.2MHz via RT resistor). Its architecture integrates top/bottom NMOS power switches (120mΩ/65mΩ), INTVCC 3.4V regulator, and BIAS pin support for efficiency optimization when VOUT ≥ 3.3V.
Burst Mode operation enables 2.5µA no-load IQ by disabling internal circuitry between switching pulses, while pulse-skipping mode (enabled via SYNC high or external clock) maintains continuous oscillator operation for reduced EMI. The device features frequency foldback during startup/overload and PG flag monitoring of FB voltage within ±8% of regulation setpoint.
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 |
| Quiescent Current | 2.5µA at 12VIN→3.3VOUT - enables always-on systems with multi-year battery life |
| Feedback Reference | 0.800V ±6mV - enables precise low-output-voltage regulation with minimal divider current |
| Max Output Current | 3.5A - sustains full load under worst-case thermal conditions in MSOP-16 package |
| Min On-Time | 30ns - allows high step-down ratios (e.g., 42V→3.3V) at 2MHz switching frequency |
| Switching Frequency | 200kHz to 2.2MHz - adjustable via RT resistor; supports EMI-sensitive and space-constrained designs |
| Power-Good Flag | ±8% VFB window - provides accurate output voltage validation before system enable |
| Enable Threshold | 1.015V rising with 50mV hysteresis - ensures clean startup and brownout recovery |
Pinout & Package
LT8610ACEMSE#PBF uses a thermally enhanced 16-lead plastic MSOP package with exposed GND pad (Pin 17) requiring PCB soldering for thermal performance (θJC = 10°C/W). Pin 7 is NC; Pins 5/6 and 9/10/11 are internally bonded VIN and SW terminals respectively.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock input / mode select | Ground for Burst Mode; tie to INTVCC or logic high for pulse-skipping; accept 1.1–2.4V sync clock |
| TR/SS (2) | Soft-start and tracking control | Capacitor sets output ramp rate; <0.8V forces FB tracking; internal 2.2µA pull-up enables programmable slew |
| RT (3) | Oscillator frequency programming | Resistor to GND sets fSW: 200kHz–2.2MHz (LT8610AC); 1.5MHz–2.2MHz (LT8610AC-1) |
| EN/UV (4) | Enable and undervoltage lockout | 1.015V rising threshold with 50mV hysteresis; supports VIN-based shutdown via resistor divider |
| VIN (5,6) | Main power input | Supplies internal circuitry and top switch; must be locally bypassed with low-ESR capacitor |
| NC (7) | No connect | Not bonded internally; leave unconnected |
| GND (8) | Signal and power return | Return path for bottom switch; tie to exposed pad (Pin 17) for optimal thermal conduction |
| SW (9,10,11) | Switch node | Output of internal power switches; connects to inductor and BST capacitor; minimize PCB area |
| BST (12) | Bootstrap supply | Drives top switch gate; requires 0.1µF ceramic capacitor placed adjacent to IC |
| INTVCC (13) | Internal 3.4V regulator output | Bypass with ≥1µF ceramic; powers control circuits; sourcing shifts to BIAS if VBIAS > 3.1V |
| BIAS (14) | Efficiency-optimized bias supply | Tie to VOUT ≥ 3.3V to reduce VIN current draw and improve light-load efficiency |
| PG (15) | Power-good open-drain flag | Pulls low when VFB outside ±8% window or fault present; valid above 3.0V VIN regardless of EN state |
| FB (16) | Feedback input | Regulated to 0.800V; connect resistor divider tap and 4.7–10pF phase-lead capacitor to VOUT |
| GND (17) | Exposed thermal pad | Internally connected to GND; must be soldered to PCB copper for thermal management |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 2.5µA IQ regulating 12VIN→3.3VOUT enables decades-long battery operation in IoT sensors |
| Synchronization capability | SYNC pin accepts external clock or DC logic level to align switching and reduce EMI in noise-sensitive systems |
| Programmable soft-start | TR/SS pin supports capacitor-programmed output ramp rate and output voltage tracking during sequencing |
| Robust fault protection | Integrated overtemperature, overcurrent (top: 6.7A, bottom: 4.3A), and UVLO with PG flag reporting |
| AEC-Q100 qualification | Rated for –40°C to 125°C junction temperature (ACE grade), supporting automotive infotainment and ADAS power rails |
| High-frequency operation | 30ns min on-time enables 2MHz switching for small magnetics and fast transient response in space-constrained designs |
Applications
| Automotive Infotainment Power | GSM Transceiver Supply |
|---|---|
Use Scenario: Powering LCD display, audio codec, and microcontroller in vehicle 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 peak current with ultralow IQ to maintain RTC and CAN wake-up during sleep. Use Value: 2.5µA quiescent current prevents battery drain over weeks of vehicle inactivity; ±8% PG flag validates rail stability before MCU boot. | Use Scenario: Providing stable 3.3V supply to GSM/GPRS modules in telematics units operating across 9V–36V vehicle battery range. IC Role / Device Role / Timing Role: High-efficiency synchronous buck regulator with 30ns min on-time enabling 2MHz operation to shrink filter components. Use Value: 93% efficiency at 1A/3.3V from 12VIN reduces thermal stress; BIAS pin connection to VOUT improves light-load efficiency during idle transmission states. |
| Industrial Sensor Node | Portable Medical Monitor |
Use Scenario: Regulating 3.3V for low-power wireless sensor nodes powered by LiSOCl₂ batteries with 3.6V nominal and 2V cutoff. IC Role / Device Role / Timing Role: Wide-input buck converter supporting 3.0V min VIN to extend usable battery life down to end-of-discharge. Use Value: 3.0V minimum input enables full battery utilization; 0.80V feedback reference allows precise low-VOUT regulation with high-resistor dividers minimizing parasitic load. | Use Scenario: Powering ECG front-end, display, and BLE radio in handheld patient monitors requiring clinical-grade reliability and low EMI. IC Role / Device Role / Timing Role: Synchronized buck converter with Burst Mode for standby and pulse-skipping during active measurement cycles. Use Value: SYNC pin enables EMI reduction by locking switching to system clock; PG flag confirms rail integrity before initiating critical analog measurements. |
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#PBF | Higher 0.97V feedback reference; 3.4V min VIN; identical 3.5A/30ns specs | Less suitable for sub-3.4V inputs or precise low-VOUT regulation | Select LT8610ABEMSE#PBF only when higher FB voltage simplifies feedback design or input never drops below 3.4V |
| LT8614EMSE#PBF | 4-channel monolithic buck (3.5A + three 1.5A); shared RT/SYNC; 2.5µA IQ per channel | Replaces multiple discrete regulators in multi-rail systems | Choose LT8614EMSE#PBF for space-constrained multi-output designs where channel count justifies integration |
Compared with LT8610ABEMSE#PBF, the LT8610ACEMSE#PBF enables lower input start-up (3.0V vs 3.4V) and tighter low-VOUT regulation (0.80V vs 0.97V reference), while LT8614EMSE#PBF trades single-channel performance for multi-rail integration-making LT8610ACEMSE#PBF optimal for high-current, single-output automotive and industrial applications demanding ultralow IQ and wide VIN range.
Availability
LT8610ACEMSE#PBF is available at Aetrix Electronics and suitable for automotive infotainment, GSM power supplies, and industrial sensor nodes requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle support.
Supply support for LT8610ACEMSE#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 industrial markets.
The LT8610AC product line delivers ultralow-quiescent-current synchronous buck regulators optimized for automotive and battery-powered systems where extended standby time and robust transient performance are critical.
FAQ
What is the minimum input voltage supported by the LT8610ACEMSE#PBF?
The LT8610ACEMSE#PBF supports a minimum input voltage of 3.0V, verified across the full –40°C to 125°C operating junction temperature range. This enables reliable operation during automotive cold-crank events and extends usable range for primary lithium batteries. The device maintains regulation down to this threshold while delivering full 3.5A output current under thermal limits.
How does the LT8610ACEMSE#PBF achieve 2.5µA quiescent current?
The LT8610ACEMSE#PBF achieves 2.5µA quiescent current through Burst Mode operation, where internal control circuitry is fully disabled between switching pulses. During light-load conditions, the device delivers single current pulses to the output capacitor and enters deep sleep, drawing only 1.7µA - the total 2.5µA figure includes typical feedback divider current reflected to VIN. This behavior is confirmed in the datasheet's Typical Performance Characteristics (Figure G10/G11).
Can the LT8610ACEMSE#PBF be synchronized to an external clock?
Yes, the LT8610ACEMSE#PBF can be synchronized to an external clock via the SYNC pin (Pin 1). When driven with a logic-level clock signal (1.1–2.4V swing), the device aligns its switching edges to the external source and operates in pulse-skipping mode. This capability is explicitly documented in the PIN FUNCTIONS section and enables EMI reduction in noise-sensitive applications such as medical monitors and automotive radar subsystems.
What is the purpose of the BIAS pin on the LT8610ACEMSE#PBF?
The BIAS pin on the LT8610ACEMSE#PBF allows the internal regulator to draw bias current from VOUT instead of VIN when VBIAS exceeds 3.1V. For output voltages ≥3.3V, connecting BIAS directly to VOUT reduces input supply current and improves light-load efficiency - a feature validated in the Electrical Characteristics table (BIAS pin current consumption = 9.2mA at VBIAS = 3.3V, ILOAD = 1A, 2MHz).
Is the LT8610ACEMSE#PBF qualified for automotive applications?
Yes, the LT8610ACEMSE#PBF is AEC-Q100 qualified for automotive applications. The "ACE" suffix in the part number denotes the –40°C to 125°C junction temperature grade, and the datasheet explicitly states automotive qualification in the FEATURES and ORDER INFORMATION sections. This includes guaranteed performance, reliability testing, and controlled manufacturing processes required for automotive power systems.
LT8610ACEMSE#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:
- 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#PBF FAQ
1.How can I place an order for LT8610ACEMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610ACEMSE#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 LT8610ACEMSE#PBF reliable?
The price and inventory of LT8610ACEMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8610ACEMSE#PBF is usually 5 days.
3.What payment methods are accepted for LT8610ACEMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610ACEMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610ACEMSE#PBF?
LT8610ACEMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610ACEMSE#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 LT8610ACEMSE#PBF?
For technical support, including LT8610ACEMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610ACEMSE#PBF requirements.
6.How does Aetrix verify that LT8610ACEMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LT8610ACEMSE#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 LT8610ACEMSE#PBF meets industry standards.
7.What is the process for return or replacement of LT8610ACEMSE#PBF?
All LT8610ACEMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610ACEMSE#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 LT8610ACEMSE#PBF part is unused and in its original packaging.
Return procedure for LT8610ACEMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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