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Analog Devices Inc. LT8652SEV#TRPBF
- Part No.:
- LT8652SEV#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 36-TFQFN Exposed Pad
- Datasheet:
-
LT8652SEV#TRPBF.pdf
- Description:
- IC REG BUCK 1V/3.3V DL 36LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,586
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Product details
Overview
LT8652SEV#TRPBF from Analog Devices is a dual-channel synchronous step-down Silent Switcher regulator delivering up to 8.5A per channel continuously (17A combined), with 3.0–18V input, 0.6V–5.5V output, 16µA quiescent current in Burst Mode, and integrated bypass capacitors for ultralow EMI. It targets noise-sensitive applications such as high-speed data converters and PLL power supplies in server and telecom infrastructure.
For engineers reviewing the LT8652SEV#TRPBF datasheet, LT8652SEV#TRPBF pinout, LT8652SEV#TRPBF application, or LT8652SEV#TRPBF equivalent, key selection criteria include dual-channel current capability, spread-spectrum EMI reduction, differential remote sensing, output current monitoring via IMON pins, and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The LT8652SEV#TRPBF implements second-generation Silent Switcher architecture with internal bypass capacitors and symmetrical layout to minimize magnetic field coupling and radiated emissions. Its fast 20ns minimum on-time enables high-frequency operation up to 3MHz while maintaining regulation at low duty cycles.
Each channel features independent feedback loops with ±1.2% 600mV reference voltage, differential sense inputs (SNSGND1/SNSGND2), and programmable current limiting via external resistors on IMON1/IMON2. Channels support forced continuous mode (FCM), Burst Mode, and phase synchronization via SYNC/CLKOUT for multi-phase scaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 18V per channel - supports wide industrial and automotive supply rails without pre-regulation. |
| Output Current | 8.5A continuous per channel (17A combined) - enables high-density dual-rail power delivery for SoCs and FPGAs. |
| Quiescent Current | 16µA (both channels regulating 12VIN→3.3VOUT) - extends battery life in always-on systems. |
| Switching Frequency | 300kHz to 3MHz (RT-programmable) - allows optimization of size vs. efficiency and EMI filtering requirements. |
| Feedback Reference | 600mV ±1.2% with remote sense - ensures accurate load-point regulation despite PCB IR drop. |
| EMI Performance | CISPR 25 Class 5 compliant with spread spectrum - eliminates need for external EMI filters in automotive designs. |
| Thermal Rating | –40°C to +125°C junction - qualified per AEC-Q100 Grade 1 for under-hood automotive use. |
| Package | 36-pin LQFN (4mm × 7mm × 0.94mm) with exposed thermal pad - provides low θJCbot = 4.2°C/W for high-power dissipation. |
Pinout & Package
LT8652SEV#TRPBF uses a 36-pin Laminate QFN (LQFN) package measuring 4mm × 7mm × 0.94mm with six GND-exposed thermal pads (pins 37–42) requiring solder connection to PCB ground plane for thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IMON1 (Pin 30) | Channel 1 average output current monitor | Outputs proportional current (e.g., 30µA/A); used with external resistor to set precise current limit (RIMON = 78kΩ/ILIM). |
| SS1 (Pin 29) | Channel 1 soft-start and tracking control | Internal 2µA pull-up enables capacitor-based voltage ramp; below 0.6V forces FB1 tracking for controlled startup. |
| RT (Pin 3) | Switching frequency programming | Resistor to GND sets fSW: 300kHz (143kΩ) to 3MHz (20kΩ) - enables EMI band spreading and layout optimization. |
| SYNC (Pin 17) | External clock synchronization input | Accepts DC (2.8V+) for FCM or external clock (300kHz–3MHz) to align switching edges across multiple phases. |
| CLKOUT (Pin 18) | Phase-aligned clock output | Provides 90°-shifted 50% duty cycle square wave in FCM; enables 4-phase interleaving with other LT8652S or compatible regulators. |
| SNSGND1 (Pin 33) | Channel 1 Kelvin sense ground | Reference point for FB1 feedback - must be connected via dedicated trace to output capacitor ground to reject PCB IR drop. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher®2 architecture | Integrated bypass capacitors and balanced layout reduce peak radiated EMI by >30dB vs. conventional buck ICs - passes CISPR 25 Class 5 without ferrites. |
| Dual independent current monitoring | IMON1/IMON2 pins deliver linear current-proportional output (±3% accuracy) - enables real-time load telemetry and overcurrent protection without sense resistors. |
| Differential remote sensing | SNSGND1/SNSGND2 pins provide dedicated Kelvin return paths - maintains ±1.2% output regulation accuracy even with 100mΩ PCB trace resistance. |
| Multi-phase scalability | CLKOUT and SYNC pins support up to 4-phase interleaving - reduces input/output ripple by √N and eases thermal management in >20A systems. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C operation with lifetime testing - suitable for automotive ADAS, infotainment, and body control modules. |
| Programmable burst mode | 16µA IQ at light load with <10mVP-P ripple - achieves >85% efficiency down to 1mA while meeting strict low-noise requirements. |
Applications
| Server CPU Core Power | Automotive ADAS Domain Controller |
|---|---|
Use Scenario: Dual-rail power for high-performance x86 CPU cores requiring 3.3V I/O and 1.0V core rails with fast transient response. IC Role / Device Role / Timing Role: Primary dual-channel buck regulator delivering 8.5A each rail with differential sensing and 20ns min-on-time for sub-100ns load-step recovery. Use Value: Eliminates need for discrete EMI filters and external current sense resistors, reducing BOM count by 7 components per rail. | Use Scenario: Powering radar processor and vision SoC in autonomous driving ECU with stringent CISPR 25 Class 5 EMI limits. IC Role / Device Role / Timing Role: AEC-Q100-qualified dual buck supplying 1.2V/8.5A and 3.3V/8.5A with spread-spectrum modulation and thermal monitoring. Use Value: Meets automotive EMC requirements without shielding cans or complex board-level filtering, cutting system cost by $1.20/unit. |
| 5G Baseband Radio Unit | Industrial PLC FPGA Power |
Use Scenario: Low-noise power for RF transceivers and high-speed ADCs/DACs in massive MIMO radio units. IC Role / Device Role / Timing Role: Noise-isolated dual regulator with Silent Switcher2 architecture, providing clean 1.0V and 1.8V rails adjacent to sensitive analog circuitry. Use Value: Achieves <–60dBc phase noise degradation at 1MHz offset - critical for 256-QAM signal integrity in 5G NR. | Use Scenario: Compact, reliable power for Xilinx Kintex Ultrascale+ FPGA in harsh industrial environments with wide temperature swings. IC Role / Device Role / Timing Role: Dual-channel buck with –40°C to +125°C operation, thermal monitoring (TEMP pin), and fault reporting via PG1/PG2. Use Value: Enables single-chip solution replacing two discrete 6A regulators, reducing PCB area by 32% and improving MTBF by 40%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ8645PGLE-Z | Single-channel 12A vs. dual 8.5A; no integrated bypass caps; 25µA IQ; requires external EMI filter for CISPR 25. | Lower integration; higher EMI risk in space-constrained RF designs; not AEC-Q100 qualified. | Choose when cost sensitivity outweighs EMI performance and automotive qualification needs. |
| TPS546D24RSAR | Dual 10A per channel; PMBus interface; 22µA IQ; no spread spectrum; larger 6x6mm QFN package. | Supports digital power management but lacks Silent Switcher EMI suppression - unsuitable for ultra-low-noise analog rails. | Prefer for systems requiring telemetry, margining, and dynamic voltage scaling via PMBus. |
Compared with MPQ8645PGLE-Z and TPS546D24RSAR, the LT8652SEV#TRPBF delivers superior EMI performance without external filters, lower quiescent current, and automotive qualification - making it optimal for noise-critical, safety-relevant, and compact applications where board space and regulatory compliance are primary constraints.
Availability
LT8652SEV#TRPBF is available at Aetrix Electronics and suitable for server power applications, automotive ADAS systems, and 5G radio units requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LT8652SEV#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 industrial, automotive, communications, and healthcare markets.
The LT8652S product line delivers dual-channel, high-current, low-EMI power conversion for noise-sensitive applications including data converters, PLLs, and high-bandwidth communication systems - emphasizing integration, efficiency, and electromagnetic compatibility.
FAQ
What is the maximum continuous output current per channel for the LT8652SEV#TRPBF?
The LT8652SEV#TRPBF delivers up to 8.5A of continuous output current from each channel under typical thermal conditions with proper PCB layout and heatsinking. When both channels operate simultaneously, total output capability reaches 17A. The device also supports short-term peak loads up to 12A per channel, enabled by its robust top-side NMOS switch with 22A current limit and 24mΩ RDS(ON).
Does the LT8652SEV#TRPBF support spread-spectrum frequency modulation?
Yes, the LT8652SEV#TRPBF supports spread-spectrum frequency modulation (SSFM) to reduce peak radiated EMI. When the SYNC pin is driven with a DC voltage ≥2.8V or tied to VCC, SSFM is activated in forced continuous mode. This feature is integral to its Silent Switcher®2 architecture and enables compliance with CISPR 25 Class 5 emission limits without external EMI filters - a key advantage confirmed in Analog Devices' DC2523A demo board test reports.
How does the LT8652SEV#TRPBF implement differential remote sensing?
The LT8652SEV#TRPBF implements differential remote sensing using dedicated SNSGND1 and SNSGND2 pins referenced to FB1 and FB2, respectively. Each feedback node regulates to a precise 600mV ±1.2% reference relative to its corresponding sense ground. To achieve this, the output capacitor's ground terminal must connect directly to SNSGND1/SNSGND2 via separate Kelvin traces - rejecting voltage drop across shared PCB ground paths and ensuring accurate load-point regulation even with 100mΩ trace resistance.
Can the LT8652SEV#TRPBF be synchronized to an external clock source?
Yes, the LT8652SEV#TRPBF supports external clock synchronization via the SYNC pin. Applying a clean square-wave clock signal (300kHz to 3MHz) to SYNC forces the device into forced continuous mode and aligns its switching edges to the external source. Simultaneously, the CLKOUT pin outputs a phase-matched, 50% duty cycle waveform - enabling precise interleaving with up to three additional LT8652SEV#TRPBF or compatible regulators for 4-phase operation and reduced input/output ripple.
Is the LT8652SEV#TRPBF qualified for automotive applications?
Yes, the LT8652SEV#TRPBF is AEC-Q100 Grade 1 qualified for automotive applications, with guaranteed operation from –40°C to +125°C junction temperature. This qualification includes stress testing for temperature cycling, humidity, mechanical shock, and lifetime reliability - making it suitable for use in ADAS domain controllers, infotainment systems, and body electronics where functional safety and long-term stability are required. The "E" suffix in LT8652SEV#TRPBF explicitly denotes the automotive-grade variant.
LT8652SEV#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Silent Switcher®2
- Package/Case:
- 36-TFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 1V, 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 8.5A, 8.5A
- Frequency - Switching:
- 300kHz ~ 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-LQFN (4x7)
LT8652SEV#TRPBF FAQ
1.How can I place an order for LT8652SEV#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8652SEV#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 LT8652SEV#TRPBF reliable?
The price and inventory of LT8652SEV#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8652SEV#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8652SEV#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8652SEV#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8652SEV#TRPBF?
LT8652SEV#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8652SEV#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 LT8652SEV#TRPBF?
For technical support, including LT8652SEV#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8652SEV#TRPBF requirements.
6.How does Aetrix verify that LT8652SEV#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8652SEV#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 LT8652SEV#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8652SEV#TRPBF?
All LT8652SEV#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8652SEV#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 LT8652SEV#TRPBF part is unused and in its original packaging.
Return procedure for LT8652SEV#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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