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Analog Devices Inc. LT8610ABEMSE-5#TRPBF
- Part No.:
- LT8610ABEMSE-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610ABEMSE-5#TRPBF.pdf
- Description:
- IC REG BUCK 5V 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,450
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Product details
Overview
LT8610ABEMSE-5#TRPBF from Analog Devices is a 42V, 3.5A synchronous step-down regulator with 2.5µA quiescent current in Burst Mode, fixed 5V output, and 30ns minimum on-time. It operates across 3.4V–42V input, delivers 91% light-load efficiency (LT8610AB variant), and targets automotive power supplies, GSM base stations, and industrial point-of-load conversion where ultra-low IQ and high reliability are critical.
For engineers reviewing the LT8610ABEMSE-5#TRPBF datasheet, LT8610ABEMSE-5#TRPBF pinout, LT8610ABEMSE-5#TRPBF application, or LT8610ABEMSE-5#TRPBF equivalent, key selection criteria include its AEC-Q100 qualification, 5V fixed-output accuracy (±0.6%), 700kHz typical switching frequency, and thermally enhanced 16-lead MSOP package with exposed GND pad.
Technical Context
The LT8610ABEMSE-5#TRPBF implements constant-frequency current-mode control with internal 0.97V reference and programmable oscillator (200kHz–2.2MHz via RT pin). Its architecture integrates top/bottom NMOS power switches (120mΩ/65mΩ RDS(on)) and supports BIAS pin operation to reduce VIN current when VOUT ≥ 3.3V.
Burst Mode regulation maintains 2.5µA IQ at no load by disabling internal circuitry between energy bursts; the LT8610AB variant achieves higher light-load efficiency than LT8610A at the cost of increased output ripple-mitigated by larger output capacitance. Frequency foldback protects during start-up and overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.4V to 42V - supports wide automotive battery transients and industrial 24/36V rails without pre-regulation. |
| Output Voltage | Fixed 5.00V ±0.6% - internally trimmed; eliminates external feedback resistors and reduces BOM count. |
| Max Output Current | 3.5A continuous - enables single-chip 5V/3.5A PoL for microcontrollers, FPGAs, and sensors. |
| Quiescent Current | 2.5µA at no load - sustains >1-year battery life in always-on automotive modules (e.g., telematics, ADAS sensors). |
| Min On-Time | 30ns - allows high step-down ratios (e.g., 42V→5V @ 700kHz) without pulse-skipping instability. |
| Efficiency (Light Load) | 91% at 1mA, 12VIN→5VOUT - superior to LT8610A (82%) due to optimized Burst Mode current limit and gate drive. |
| Switching Frequency | Programmable 200kHz–2.2MHz - avoids AM band interference and enables compact magnetics with 4.7µH inductor. |
| Package | 16-Lead MSOP with exposed thermal pad - θJA = 40°C/W; requires soldered GND pad for thermal performance and EMI reduction. |
Pinout & Package
LT8610ABEMSE-5#TRPBF uses a thermally enhanced 16-lead plastic MSOP package (MSE) with exposed GND pad (Pin 17), requiring PCB soldering for thermal and electrical integrity. Pin 7 is NC; Pins 5/6 and 9/10/11 are paralleled for high-current paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock sync input | Ground for low-ripple Burst Mode; tie to INTVCC or logic high for pulse-skipping; enables EMI control via frequency dithering. |
| TR/SS (2) | Soft-start/tracking control | Capacitor-programmed voltage ramp prevents inrush; enables output tracking during sequencing with other rails. |
| RT (3) | Oscillator frequency set | Resistor-to-GND sets fSW; 60.4kΩ yields 700kHz - balances efficiency, size, and EMI. |
| EN/UV (4) | Enable/undervoltage lockout | 1.00V rising threshold; hysteresis ensures clean startup/shutdown during battery brownouts. |
| VIN (5,6) | Main power input | Parallel pins minimize IR drop; require local 1µF ceramic bypass close to pins for stability. |
| GND (8) | Power ground return | Return path for bottom switch; must be tied to exposed pad (Pin 17) for thermal and noise performance. |
| SW (9,10,11) | Switch node | High-dI/dt node; connect to inductor and BST capacitor; keep PCB trace short and wide to reduce EMI. |
| BST (12) | Bootstrap supply | Drives top NMOS gate; requires 0.1µF ceramic capacitor from BST to SW for reliable high-side conduction. |
| INTVCC (13) | Internal 3.4V regulator output | Bypass with ≥1µF ceramic; powers control logic; draws from BIAS if VBIAS > 3.1V, reducing VIN current. |
| BIAS (14) | Efficiency-boost bias supply | Tie to VOUT (5V) to source INTVCC current, cutting VIN quiescent draw by >50% in 5V applications. |
| PG (15) | Power good flag | Open-drain output signals VOUT within ±9% of 5V and absence of faults; drives MCU reset or status LED. |
| VOUT (16) | Regulated 5V output | Fixed 5V rail; connects to internal 12.5MΩ feedback divider - no external resistors needed. |
| GND (17) | Exposed thermal pad | Mandatory solder connection to PCB GND plane; lowers θJC to 10°C/W and improves thermal margin by >25°C. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Rated for –40°C to +125°C junction temperature - validated for automotive infotainment, body control, and ADAS modules. |
| Ultralow Quiescent Current | 2.5µA IQ regulating 12VIN→5VOUT - enables >10-year shelf life in battery-backed systems without periodic recharge. |
| Fixed 5V Output with Internal Divider | 12.5MΩ internal resistor network - eliminates external feedback components, saves board space, and improves long-term output stability. |
| BIAS Pin Efficiency Optimization | Draws INTVCC current from VOUT instead of VIN when VBIAS ≥ 3.3V - reduces total input current by up to 790µA at 1mA load in 5V applications. |
| Robust Overload Protection | Safely tolerates inductor saturation; top switch current limit = 6.7A, bottom switch = 4.3A - prevents thermal runaway during short-circuit events. |
| Low Dropout Operation | 200mV dropout at 1A - maintains regulation down to VIN = 5.2V, supporting cold-crank scenarios in 12V automotive systems. |
Applications
| Automotive Infotainment Power Supply | GSM Base Station RF Module |
|---|---|
Use Scenario: Powers DSP, display controller, and audio codec in head-unit under varying battery voltage (6V–16V) and ambient temperatures (–40°C–85°C). IC Role / Device Role / Timing Role: Primary 5V PoL regulator delivering 3.5A with AEC-Q100 compliance and 2.5µA sleep current for always-on CAN wake-up capability. Use Value: Eliminates need for external LDO post-regulator; maintains system readiness during vehicle off-state with <10µA total system standby draw. | Use Scenario: Supplies 5V to RF power amplifier stages in 2G/3G BTS where burst-mode transmission causes dynamic load swings from 10mA to 2.5A. IC Role / Device Role / Timing Role: High-efficiency buck converter with fast transient response (<50µs) and frequency foldback to prevent inductor saturation during peak transmit pulses. Use Value: Achieves 93% efficiency at 1A/5V from 12VIN, reducing thermal load on densely packed RF boards and enabling passive cooling. |
| Industrial PLC I/O Module | Medical Portable Diagnostic Device |
Use Scenario: Provides isolated 5V rail for digital isolators and ADC front-ends in DIN-rail mounted controllers operating from 24VDC industrial bus. IC Role / Device Role / Timing Role: Main 5V regulator with EN/UV pin configured for 20V undervoltage lockout, preventing erratic behavior during brownout conditions. Use Value: 30ns min-on-time enables direct 24V→5V conversion at 700kHz, avoiding bulky two-stage designs and improving system MTBF. | Use Scenario: Powers microcontroller, touch interface, and Bluetooth LE radio in handheld ultrasound probe with Li-ion battery (3.0V–4.2V) and USB charging input (5V). IC Role / Device Role / Timing Role: Dual-input capable buck (VIN accepts 5V USB or boosted battery); TR/SS pin enables controlled power-up sequencing with analog front-end. Use Value: 91% light-load efficiency extends battery runtime by 35% vs. standard buck converters during idle/sleep states between scans. |
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 |
|---|---|---|---|
| LT8610AEMSE-5#TRPBF | Same 5V fixed output, 3.5A rating, and package, but LT8610A variant has 82% light-load efficiency (vs. 91% for LT8610AB) and higher Burst Mode ripple. | Preferred where lowest possible output ripple is critical and light-load efficiency is secondary (e.g., noise-sensitive analog circuits). | Select LT8610AEMSE-5#TRPBF only if measured output ripple must stay <5mVP-P at 1mA load; otherwise LT8610ABEMSE-5#TRPBF delivers superior battery life. |
| MP2451DT-LF-Z | 3.3V–36V input, 5V fixed output, 0.6A max current, 2.5µA IQ, SOT-23-6 package - lacks AEC-Q100, BIAS pin, and 3.5A capability. | Suitable for low-power consumer IoT nodes, not automotive or industrial 3.5A loads. | Choose MP2451DT-LF-Z only for cost-sensitive, sub-1A applications where AEC-Q100 and thermal performance are not required. |
Compared with LT8610AEMSE-5#TRPBF, the LT8610ABEMSE-5#TRPBF trades slightly higher output ripple for 9% absolute light-load efficiency gain - directly extending battery life in always-on systems. Versus MP2451DT-LF-Z, it delivers 5.8× higher output current, automotive qualification, and integrated thermal management in a larger but necessary package.
Availability
LT8610ABEMSE-5#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment systems, GSM base station RF modules, and industrial PLC I/O modules requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for LT8610ABEMSE-5#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, industrial automation, and automotive markets since 1965.
The LT8610A/LT8610AB series was designed specifically for automotive and industrial DC/DC conversion where ultralow quiescent current, wide input range, and AEC-Q100 reliability are mandatory - targeting next-generation telematics, ADAS, and smart factory edge nodes.
FAQ
What is the guaranteed output voltage accuracy of the LT8610ABEMSE-5#TRPBF over temperature and line?
The LT8610ABEMSE-5#TRPBF guarantees 5.00V output with ±0.6% accuracy over full operating temperature (–40°C to +125°C) and input voltage range (6V to 42V at 1A load), per Electrical Characteristics table on page 3 of the Rev. C datasheet. This is achieved via laser-trimmed internal 12.5MΩ feedback resistors and 0.02%/V line regulation.
Can the LT8610ABEMSE-5#TRPBF operate from a 5V USB input while delivering 3.5A at 5V output?
No - the LT8610ABEMSE-5#TRPBF requires minimum 3.4V input but cannot regulate 5V→5V; its dropout voltage is 200mV at 1A, meaning VIN must exceed 5.2V to sustain 5V/3.5A output. For USB-powered 5V applications, use a buck-boost or LDO solution instead of LT8610ABEMSE-5#TRPBF.
How does the BIAS pin improve efficiency in the LT8610ABEMSE-5#TRPBF when used in a 5V application?
In LT8610ABEMSE-5#TRPBF, connecting the BIAS pin to VOUT (5V) sources INTVCC current from the output rail instead of VIN, reducing total input current by up to 790µA at 1mA load (per datasheet Table on p.3). This cuts quiescent consumption nearly in half, directly extending battery life in portable 5V systems.
Is the LT8610ABEMSE-5#TRPBF pin-compatible with the LT8610AEMSE-5#TRPBF?
Yes - LT8610ABEMSE-5#TRPBF and LT8610AEMSE-5#TRPBF share identical 16-lead MSOP package, pinout, and footprint. They differ only in internal Burst Mode optimization; both use same PCB layout, external components, and thermal design - enabling drop-in replacement where higher light-load efficiency is desired.
What is the maximum recommended switching frequency for the LT8610ABEMSE-5#TRPBF with 4.7µH inductor and 5V/3.5A output?
The LT8610ABEMSE-5#TRPBF supports up to 2.2MHz, but for 5V/3.5A output with 4.7µH inductor, 700kHz (RT = 60.4kΩ) is the recommended maximum - balancing efficiency (>93% at 1A), thermal rise (<25°C), and EMI. Higher frequencies increase switching losses and require tighter layout control per Figure G05 on datasheet page 5.
LT8610ABEMSE-5#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):
- 5V
- 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-5#TRPBF FAQ
1.How can I place an order for LT8610ABEMSE-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610ABEMSE-5#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-5#TRPBF reliable?
The price and inventory of LT8610ABEMSE-5#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-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610ABEMSE-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610ABEMSE-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610ABEMSE-5#TRPBF?
LT8610ABEMSE-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610ABEMSE-5#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-5#TRPBF?
For technical support, including LT8610ABEMSE-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610ABEMSE-5#TRPBF requirements.
6.How does Aetrix verify that LT8610ABEMSE-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610ABEMSE-5#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-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610ABEMSE-5#TRPBF?
All LT8610ABEMSE-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610ABEMSE-5#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-5#TRPBF part is unused and in its original packaging.
Return procedure for LT8610ABEMSE-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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