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Analog Devices Inc. LT8610EMSE#TRPBF
- Part No.:
- LT8610EMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610EMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 2.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LT8610EMSE#TRPBF from Analog Devices (formerly Linear Technology) is a 42V, 2.5A synchronous step-down regulator with 2.5µA quiescent current in Burst Mode, 50ns minimum on-time, and internal compensation for fast transient response. It operates from 3.4V to 42V input, delivers up to 2.5A output, and supports adjustable switching frequency from 200kHz to 2.2MHz - ideal for automotive infotainment power rails requiring ultra-low standby consumption.
For engineers reviewing the LT8610EMSE#TRPBF datasheet, LT8610EMSE#TRPBF pinout, LT8610EMSE#TRPBF application, or LT8610EMSE#TRPBF equivalent, key selection criteria include ultralow IQ regulation at 12VIN→3.3VOUT, ±9% power-good accuracy, 16-lead MSOP thermal pad layout, and synchronization capability for EMI-sensitive systems.
Technical Context
The LT8610EMSE#TRPBF implements peak current mode control with internal compensation, enabling stable operation with small inductors and fast load-step response. Its 50ns minimum on-time supports high VIN/VOUT ratios (e.g., 42V→3.3V), while integrated top/bottom NMOS switches (120mΩ/65mΩ RDS(ON)) eliminate external FETs.
Burst Mode operation maintains <10mVP-P output ripple at light loads while drawing only 2.5µA from VIN; pulse-skipping mode (enabled via SYNC pin) trades IQ for deterministic timing alignment. The EN/UV pin features 1.0V threshold with 40mV hysteresis for precise undervoltage lockout.
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 without pre-regulation. |
| Quiescent Current | 2.5µA at 12VIN→3.3VOUT - enables >1-year battery life in always-on vehicle modules. |
| Output Current | 2.5A continuous - sufficient for powering DSPs, microcontrollers, and interface ICs in compact designs. |
| Switching Frequency | 200kHz to 2.2MHz (RT-programmable) - allows optimization of inductor size vs. efficiency across input/output combinations. |
| Minimum On-Time | 50ns - enables 42V→3.3V conversion at 700kHz without duty-cycle limitation or cycle skipping. |
| Power-Good Accuracy | ±9% of VFB (0.97V) - provides reliable system reset signaling with tight tolerance over temperature. |
| Thermal Package | 16-lead MSOP with exposed pad (θJC = 10°C/W) - delivers 125°C junction operation with minimal PCB copper area. |
Pinout & Package
LT8610EMSE#TRPBF is housed in a thermally enhanced 16-lead plastic MSOP package (MSE) with an exposed GND pad (Pin 17) that must be soldered to PCB for thermal performance. θJA = 40°C/W, θJC(PAD) = 10°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock input | Enables synchronization to external source or forces pulse-skipping mode; floating prohibited. |
| TR/SS (2) | Soft-start/tracking control | 2.2µA internal pull-up sets output ramp rate; pulled low during fault/shutdown for safe discharge. |
| RT (3) | Frequency programming | Resistor-to-ground sets switching frequency (200kHz–2.2MHz); determines inductor/capacitor sizing. |
| EN/UV (4) | Enable/undervoltage lockout | 1.0V rising threshold with 40mV hysteresis - programmable UVLO using resistor divider from VIN. |
| VIN (5,6) | Main power input | Dual pins reduce IR drop; require local 1µF ceramic bypass close to pins and PGND. |
| PGND (7,8) | Power switch return | Low-inductance path for bottom FET; must tie directly to input capacitor negative terminal. |
| SW (9–11) | Switch node | Three parallel pins minimize trace inductance; connect to inductor and 0.1µF BST capacitor. |
| BST (12) | Bootstrap supply | Drives top FET gate above VIN; requires 0.1µF ceramic capacitor between BST and SW. |
| INTVCC (13) | Internal 3.4V regulator output | Bypass with ≥1µF ceramic; supplies internal logic; draws from BIAS if VBIAS > 3.1V. |
| BIAS (14) | Efficiency-boost bias supply | Connect to VOUT ≥3.3V to reduce VIN current draw and improve light-load efficiency. |
| PG (15) | Open-drain power-good flag | Asserts high when VOUT is within ±9% of 0.97V reference; valid above 3.4VIN regardless of EN state. |
| FB (16) | Feedback reference input | Regulated to 0.970V ±0.006V; connects to resistor divider; requires 4.7–10pF phase-lead capacitor. |
| GND (17) | Exposed thermal pad | Must be soldered to PCB ground plane - primary thermal path and electrical GND reference. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode | 2.5µA input current at no load preserves battery life in always-on automotive modules. |
| 50ns Minimum On-Time | Enables single-stage 42V→3.3V conversion at 700kHz without forced discontinuous mode or instability. |
| Integrated Power Switches | 120mΩ top / 65mΩ bottom NMOS eliminates external FETs and gate drivers, reducing BOM count by 6+ components. |
| Programmable Synchronization | SYNC pin accepts external clock (0–2.2MHz) or DC high to align switching edges - critical for EMI compliance in ADAS systems. |
| Accurate Power-Good Flag | PG asserts within ±9% of 0.97V reference and signals faults - enables robust system-level power sequencing and monitoring. |
| BIAS Pin Efficiency Boost | Connecting BIAS to VOUT ≥3.3V reduces VIN current draw and improves light-load efficiency by >5% at 10mA load. |
Applications
| Automotive Infotainment | GSM Base Station Power |
|---|---|
|
Use Scenario: Powering SoC, audio codec, and display controller in head unit with cold-crank (4.5V) and load-dump (42V) immunity. IC Role / Device Role / Timing Role: Primary 3.3V/2.5A buck regulator with ultralow IQ for always-on CAN wake-up circuitry. Use Value: Maintains 2.5µA quiescent current during sleep mode, extending vehicle battery life beyond 1 year without recharge. |
Use Scenario: Generating 5V rail for RF front-end ICs and FPGA configuration in remote radio units. IC Role / Device Role / Timing Role: High-efficiency, low-noise intermediate converter operating at 2MHz to avoid GSM transmit bands. Use Value: 96% efficiency at 1A/5V from 12VIN and <10mVP-P ripple enable clean RF signal integrity without additional LDO post-regulation. |
| Industrial Sensor Node | Portable Medical Monitor |
|
Use Scenario: Supplying 3.3V to low-power MCU, BLE radio, and analog sensor front-end in battery-powered condition monitoring device. IC Role / Device Role / Timing Role: Main system regulator with programmable soft-start (TR/SS) to prevent inrush into capacitive loads. Use Value: 50ns min-on-time and 200kHz–2.2MHz frequency range allow optimal trade-off between inductor size (≤2.2µH) and battery runtime. |
Use Scenario: Providing regulated 5V/2.5A for LCD backlight, data acquisition ADC, and USB charging port in handheld diagnostic tool. IC Role / Device Role / Timing Role: Compact, thermally efficient buck converter with PG flag for system health monitoring and fault logging. Use Value: Exposed-pad MSOP package achieves 125°C junction rating with minimal heatsinking - critical for sealed medical enclosures. |
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 |
|---|---|---|---|
| LT8614EMSE#TRPBF | Quad-channel version with independent enable and PG per channel; same 42V/2.5A per channel specs and 2.5µA IQ. | Replaces multiple discrete converters in multi-rail systems (e.g., camera module with separate core/I/O/analog rails). | Select when consolidating 2–4 buck rails onto one IC to reduce board area and component count. |
| MPQ4420AGL-AEC1-Z | Automotive-grade 42V/2A buck with 17µA IQ; lacks SYNC, TR/SS, and BIAS pins; fixed 2.2MHz frequency. | Suitable for cost-sensitive AEC-Q100 Grade 1 applications where ultralow IQ and programmability are secondary to qualification. | Choose only if AEC-Q100 certification is mandatory and 2.5A output + 2.5µA IQ are not required. |
Compared with LT8614EMSE#TRPBF, the LT8610EMSE#TRPBF offers lower system cost and simpler layout for single-rail designs; versus MPQ4420AGL-AEC1-Z, it delivers superior light-load efficiency and design flexibility at the expense of non-AEC qualification.
Availability
LT8610EMSE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial sensor nodes, and portable medical monitors requiring stable component supply, long-lifecycle support, and guaranteed parametric performance across –40°C to 125°C.
Supply support for LT8610EMSE#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 acquired Linear Technology in 2017 and maintains full product support, datasheets, and application engineering for all LT parts including the LT8610 series.
The LT8610 belongs to Linear's high-voltage monolithic buck regulator family, designed specifically for automotive, industrial, and battery-powered systems demanding ultralow quiescent current, wide input range, and robust thermal performance in compact packages.
FAQ
What is the maximum junction temperature rating for the LT8610EMSE#TRPBF?
The LT8610EMSE#TRPBF is rated for operation from –40°C to 125°C junction temperature. Its 16-lead MSOP package with exposed thermal pad (θJC = 10°C/W) enables reliable operation at this maximum rating when properly soldered to a PCB ground plane with adequate copper area. Derating applies above 125°C per manufacturer specifications.
How does the BIAS pin improve efficiency in the LT8610EMSE#TRPBF?
The BIAS pin on the LT8610EMSE#TRPBF allows the internal 3.4V regulator to draw current from VOUT (≥3.3V) instead of VIN, reducing input supply current and improving light-load efficiency by up to 5% at 10mA output. This feature is especially valuable in 5V or 3.3V output configurations where VOUT can directly power the IC's internal circuitry.
Can the LT8610EMSE#TRPBF operate with a 42V input and 3.3V output at 700kHz?
Yes, the LT8610EMSE#TRPBF supports 42V→3.3V conversion at 700kHz thanks to its 50ns minimum on-time, which satisfies the required ~8% duty cycle without cycle skipping. The datasheet confirms stable operation under these conditions with typical efficiency >85% and <10mVP-P output ripple in Burst Mode.
What is the purpose of the TR/SS pin on the LT8610EMSE#TRPBF?
The TR/SS (Track/Soft-Start) pin on the LT8610EMSE#TRPBF controls output voltage ramp rate during startup and enables output tracking. An internal 2.2µA pull-up current charges an external capacitor to program slew rate; during fault or shutdown, an internal 230Ω MOSFET pulls TR/SS to ground, ensuring safe discharge and preventing latch-up in cascaded power systems.
Does the LT8610EMSE#TRPBF require external compensation components?
No, the LT8610EMSE#TRPBF uses internal compensation with peak current mode control, eliminating the need for external compensation networks. This simplifies design, reduces component count, and ensures stable loop response across all operating conditions - verified by the manufacturer's typical application circuits and stability analysis in the datasheet.
LT8610EMSE#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):
- 3.4V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 0.97V
- Voltage - Output (Max):
- 40V
- Current - Output:
- 2.5A
- 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
LT8610EMSE#TRPBF FAQ
1.How can I place an order for LT8610EMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610EMSE#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 LT8610EMSE#TRPBF reliable?
The price and inventory of LT8610EMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8610EMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610EMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610EMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610EMSE#TRPBF?
LT8610EMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610EMSE#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 LT8610EMSE#TRPBF?
For technical support, including LT8610EMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610EMSE#TRPBF requirements.
6.How does Aetrix verify that LT8610EMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610EMSE#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 LT8610EMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610EMSE#TRPBF?
All LT8610EMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610EMSE#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 LT8610EMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT8610EMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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