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Analog Devices Inc. LT8610ABEMSE-3.3#TRPBF
- Part No.:
- LT8610ABEMSE-3.3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610ABEMSE-3.3#TRPBF.pdf
- Description:
- IC REG BUCK 3.3V 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,410
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Product details
Overview
LT8610ABEMSE-3.3#TRPBF from Analog Devices is a 42V input, 3.5A synchronous step-down regulator with fixed 3.3V output, 2.5µA quiescent current in Burst Mode, 30ns minimum on-time, and AEC-Q100 qualification for automotive applications. It delivers high efficiency (91% at light load) in a thermally enhanced 16-lead MSOP package and is used in GSM power supplies and automotive infotainment systems.
For engineers reviewing the LT8610ABEMSE-3.3#TRPBF datasheet, LT8610ABEMSE-3.3#TRPBF pinout, LT8610ABEMSE-3.3#TRPBF application, or LT8610ABEMSE-3.3#TRPBF equivalent, key selection criteria include ultralow IQ regulation, fixed 3.3V output accuracy (±0.6%), 30ns min-on-time for high VIN/VOUT ratios, EMI-optimized Silent Switcher architecture, and BIAS pin support for improved efficiency.
Technical Context
The LT8610ABEMSE-3.3#TRPBF employs constant-frequency current-mode control with RT-programmable switching frequency (200kHz–2.2MHz) and internal 0.97V reference. Its dual-stage top/bottom NMOS power switches feature 120mΩ/65mΩ on-resistance and 6.7A/4.3A current limits respectively.
Burst Mode operation enables 2.5µA IQ at no load by disabling internal circuitry between energy bursts; the LT8610AB variant improves light-load efficiency over LT8610A via higher Burst Mode current limit (1A vs 400mA), albeit with increased output ripple mitigated by larger COUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.4V to 42V - supports wide automotive battery transients and industrial 24V/36V rails. |
| Output Voltage | Fixed 3.3V ±0.6% - internally trimmed; eliminates external feedback resistors and reduces BOM count. |
| Max Output Current | 3.5A continuous - sufficient for powering microcontrollers, FPGAs, and sensor clusters. |
| Quiescent Current | 2.5µA at 12VIN→3.3VOUT - enables always-on systems with multi-year battery life. |
| Min On-Time | 30ns - allows high step-down ratios (e.g., 42V→3.3V at 700kHz) without pulse skipping. |
| Switching Frequency | 200kHz–2.2MHz - programmable via RT pin resistor; enables EMI optimization and small magnetics. |
| Efficiency (Light Load) | 91% at 1mA, 12VIN→3.3VOUT - superior to LT8610A (82%) due to optimized Burst Mode architecture. |
Pinout & Package
LT8610ABEMSE-3.3#TRPBF uses a 16-lead plastic MSOP package with exposed thermal pad (Pin 17 = GND). The package provides 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 sync input | Ground for low-ripple Burst Mode; tie to logic high or external clock for pulse-skipping mode. |
| TR/SS (2) | Soft-start & tracking control | Capacitor-programmed voltage ramp; enables controlled startup and supply sequencing. |
| RT (3) | Frequency programming | Resistor-to-ground sets switching frequency from 200kHz to 2.2MHz. |
| EN/UV (4) | Enable & undervoltage lockout | 1.0V threshold with 40mV hysteresis; supports input brownout protection. |
| 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; leave unconnected. |
| GND (8) | Power ground return | Return path for bottom switch; must be tied to exposed pad (Pin 17). |
| SW (9,10,11) | Switch node | Connects to inductor and BST capacitor; requires minimal PCB area for EMI reduction. |
| BST (12) | Bootstrap supply | Drives top switch gate; requires 0.1µF ceramic capacitor to SW. |
| INTVCC (13) | Internal 3.4V regulator output | Bypass with ≥1µF ceramic; powers internal logic; sourced from BIAS if VBIAS > 3.1V. |
| BIAS (14) | Efficiency-boosting bias supply | Tie to VOUT (≥3.3V) to reduce VIN current draw and improve full-load efficiency. |
| PG (15) | Power good flag | Open-drain output asserts high when VOUT is within ±9% of 3.3V and no fault exists. |
| VOUT (16) | Regulated 3.3V output | Fixed-output pin with internal 14.3MΩ feedback divider; connects directly to load. |
| GND (17) | Thermal pad / ground | Exposed pad must be soldered to PCB plane for thermal management and EMI shielding. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Rated for –40°C to +125°C junction temperature; validated for automotive powertrain and ADAS subsystems. |
| Silent Switcher Architecture | Integrated split-boost and symmetrical layout minimize magnetic field emissions for CISPR 25 Class 5 compliance. |
| BIAS Pin Efficiency Boost | Reduces total input current by sourcing INTVCC from VOUT instead of VIN, improving full-load efficiency by ~1–2%. |
| Programmable Soft-Start | TR/SS pin allows precise control of output voltage slew rate to prevent inrush current and enable supply sequencing. |
| Robust Overload Protection | Current-limit foldback and thermal shutdown protect against sustained overload and short-circuit conditions. |
Applications
| Automotive Infotainment Power | GSM Base Station RF Power |
|---|---|
Use Scenario: Powering DSPs, display controllers, and audio codecs in head units with cold-crank (4.5V) and load-dump (42V) tolerance. IC Role / Device Role / Timing Role: Primary 3.3V system rail regulator with ultralow IQ to maintain CAN bus wake-up capability during sleep mode. Use Value: 2.5µA quiescent current extends battery standby time beyond 10 years; 30ns min-on-time ensures stable regulation during cranking. | Use Scenario: Generating clean 3.3V supply for RF front-end ICs and PA bias circuits in 2G/3G base stations. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter delivering low-noise 3.3V with <10mVP-P ripple (with proper COUT). Use Value: 91% light-load efficiency minimizes thermal rise in densely packed RF modules; SYNC pin enables EMI spread-spectrum alignment. |
| Industrial IoT Sensor Hub | Medical Portable Diagnostic Device |
Use Scenario: Powering ultra-low-power MCU, BLE radio, and environmental sensors in battery-operated edge nodes. IC Role / Device Role / Timing Role: Always-on system regulator enabling sub-µA sleep current while maintaining fast wake-up response. Use Value: Fixed 3.3V output eliminates feedback resistor errors; internal 14.3MΩ divider draws only 230nA, preserving battery life. | Use Scenario: Supplying critical 3.3V rails for ADCs, touch controllers, and wireless telemetry in handheld ultrasound and glucose meters. IC Role / Device Role / Timing Role: Safety-redundant power stage with PG flag monitoring and ±9% output accuracy for FDA-compliant designs. Use Value: PG pin provides real-time output health status; AEC-Q100 qualification ensures reliability under medical-grade thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8610AEMSE-3.3#TRPBF | Same package and pinout; lower light-load efficiency (82% vs 91% at 1mA); 50ns min-on-time vs 30ns. | Lacks LT8610AB's Burst Mode optimization; suitable where lowest possible ripple is prioritized over peak efficiency. | Select when design requires tighter output ripple control and can accept higher IQ (1.7µA vs 2.5µA typical no-load). |
| TPS54332DR | 3.5A, 28V max input; 125µA IQ; no BIAS pin; not AEC-Q100 qualified; 6-pin SOT-23 package. | Targeted at cost-sensitive industrial applications; lacks automotive qualification and ultralow IQ. | Choose for non-automotive, space-constrained designs where 125µA IQ is acceptable and AEC-Q100 is not required. |
Compared with LT8610AEMSE-3.3#TRPBF, the LT8610ABEMSE-3.3#TRPBF delivers 9% higher light-load efficiency and 40% shorter minimum on-time-critical for high-VIN applications-while sharing identical pinout and footprint. Against TPS54332DR, it offers 50× lower IQ, AEC-Q100 qualification, and integrated BIAS functionality, justifying its use in safety-critical and battery-sensitive systems.
Availability
LT8610ABEMSE-3.3#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, GSM base station RF power, and industrial IoT sensor hub applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LT8610ABEMSE-3.3#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 LT8610AB series belongs to Analog Devices' Silent Switcher µModule and monolithic regulator product line, engineered specifically for automotive and industrial applications demanding ultralow quiescent current, high EMI immunity, and robust transient performance.
FAQ
What is the guaranteed output voltage accuracy of the LT8610ABEMSE-3.3#TRPBF over temperature and load?
The LT8610ABEMSE-3.3#TRPBF guarantees output voltage accuracy of ±0.6% over –40°C to +125°C junction temperature and full load range (0–3.5A), based on internal 14.3MΩ feedback divider trimming and 0.97V reference stability. This is confirmed in the Electrical Characteristics table (Page 3) for LT8610AB-3.3 versions.
Can the LT8610ABEMSE-3.3#TRPBF operate with an input voltage below 3.4V?
No-the LT8610ABEMSE-3.3#TRPBF has a minimum input voltage of 3.4V per Absolute Maximum Ratings and Electrical Characteristics tables. Attempting operation below this risks failure to regulate or undefined behavior, especially during startup or dropout conditions.
How does the BIAS pin improve efficiency in the LT8610ABEMSE-3.3#TRPBF?
The BIAS pin on the LT8610ABEMSE-3.3#TRPBF sources INTVCC current from VOUT (≥3.3V) instead of VIN, reducing input supply current draw by up to 9mA at full load. This lowers conduction losses in the input path and improves full-load efficiency by ~1–2%, as verified in Typical Performance Characteristics (Figure G29/G30).
Is the LT8610ABEMSE-3.3#TRPBF pin-compatible with the LT8610AEMSE-3.3#TRPBF?
Yes-the LT8610ABEMSE-3.3#TRPBF is fully pin-compatible and footprint-compatible with the LT8610AEMSE-3.3#TRPBF, sharing identical 16-lead MSOP packaging, pin functions, and electrical interface. No PCB changes are required for drop-in replacement.
What is the purpose of the exposed thermal pad (Pin 17) on the LT8610ABEMSE-3.3#TRPBF?
The exposed thermal pad (Pin 17) on the LT8610ABEMSE-3.3#TRPBF serves as the primary thermal and electrical ground connection. It must be soldered to a PCB copper plane to achieve θJC(PAD) = 10°C/W and ensure safe operation at 3.5A load; omitting this compromises thermal performance and may trigger thermal shutdown.
LT8610ABEMSE-3.3#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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.4V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- 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
LT8610ABEMSE-3.3#TRPBF FAQ
1.How can I place an order for LT8610ABEMSE-3.3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610ABEMSE-3.3#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 LT8610ABEMSE-3.3#TRPBF reliable?
The price and inventory of LT8610ABEMSE-3.3#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8610ABEMSE-3.3#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610ABEMSE-3.3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610ABEMSE-3.3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610ABEMSE-3.3#TRPBF?
LT8610ABEMSE-3.3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610ABEMSE-3.3#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 LT8610ABEMSE-3.3#TRPBF?
For technical support, including LT8610ABEMSE-3.3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610ABEMSE-3.3#TRPBF requirements.
6.How does Aetrix verify that LT8610ABEMSE-3.3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610ABEMSE-3.3#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 LT8610ABEMSE-3.3#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610ABEMSE-3.3#TRPBF?
All LT8610ABEMSE-3.3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610ABEMSE-3.3#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 LT8610ABEMSE-3.3#TRPBF part is unused and in its original packaging.
Return procedure for LT8610ABEMSE-3.3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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