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Analog Devices Inc. LT8652SIV#TRPBF
- Part No.:
- LT8652SIV#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 36-TFQFN Exposed Pad
- Datasheet:
-
LT8652SIV#TRPBF.pdf
- Description:
- IC REG BUCK 1V/3.3V DL 36LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,563
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Product details
Overview
LT8652SIV#TRPBF from Analog Devices is a dual-channel synchronous step-down Silent Switcher regulator delivering up to 8.5A per channel continuously (17A combined), operating from 3.0–18V input, with 16µA quiescent current in Burst Mode and ±1.2% feedback reference accuracy. It integrates bypass capacitors and spread-spectrum modulation for ultra-low EMI, targeting noise-sensitive PLL and high-bandwidth data system power rails.
For engineers reviewing the LT8652SIV#TRPBF datasheet, LT8652SIV#TRPBF pinout, LT8652SIV#TRPBF application, or LT8652SIV#TRPBF equivalent, key selection criteria include dual-channel 8.5A/12A capability, 300kHz–3MHz adjustable switching frequency, differential remote sensing, output current monitoring via IMON pins, and AEC-Q100 qualification for automotive use.
Technical Context
The LT8652SIV#TRPBF employs second-generation Silent Switcher architecture with integrated bypass capacitors and spread-spectrum frequency modulation to suppress radiated EMI without requiring complex PCB layout mitigation. Its fast 20ns minimum on-time enables high-frequency operation up to 3MHz while maintaining stable regulation under fast load transients.
Dual independent control loops support flexible configuration: channels can operate separately, be paralleled for 17A single-output, or synchronize across multiple ICs for 4-phase 34A supplies using CLKOUT and SYNC pins. Differential sensing at SNSGND1/SNSGND2 ensures ±1.2% output voltage accuracy at point-of-load in high-current applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 8.5A continuous per channel; supports 12A peak per channel with proper thermal design. |
| Input Voltage Range | 3.0V to 18V - enables direct operation from 3.3V, 5V, 12V, or automotive battery rails. |
| Quiescent Current | 16µA (both channels regulating 12VIN→3.3VOUT) - extends battery life in always-on systems. |
| Feedback Reference | 600mV ±1.2% with remote sense - enables precise point-of-load regulation despite PCB IR drop. |
| Switching Frequency | 300kHz to 3MHz (RT-programmable) - allows optimization of size, efficiency, and transient response. |
| 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. |
Pinout & Package
LT8652SIV#TRPBF is housed in a thermally enhanced 36-pin LQFN package (4mm × 7mm × 0.94mm) with exposed GND pad (pins 37–42). The package supports high-power density layouts and requires soldering the exposed pad to PCB ground for optimal thermal performance (θJCbot = 4.2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IMON1 (30), IMON2 (1) | Average output current monitor | Current source proportional to channel output current; 1.0V threshold sets current limit via external resistor (RIMON = 78kΩ/ILIM). |
| SS1 (29), SS2 (2) | Soft-start and tracking control | Voltage below 0.6V forces FBx to track SSx; internal 2µA pull-up enables capacitor-programmed slew rate. |
| FB1 (32), FB2 (35) | Feedback input | Regulated to 600mV ±1.2% referenced to SNSGND1/SNSGND2 - enables Kelvin remote sensing. |
| SNSGND1 (33), SNSGND2 (34) | Remote sense ground | Provides dedicated Kelvin return path for feedback divider - critical for <±1.2% load regulation accuracy. |
| CLKOUT (18), SYNC (17) | Multi-phase synchronization | CLKOUT outputs 90°-phase-shifted clock in FCM; SYNC accepts external clock or DC level to force mode and enable 4-phase operation. |
| VIN1 (5–7), VIN2 (9–11) | Independent input supplies | VIN1 powers internal circuitry and Channel 1 HS-FET; VIN2 powers Channel 2 HS-FET only - supports split-input architectures. |
Key Features
| Feature | Design Value |
|---|---|
| Second-generation Silent Switcher | Integrated bypass capacitors + spread-spectrum modulation reduce radiated EMI by >30dB vs. first-gen, eliminating layout sensitivity. |
| Dual-channel current monitoring | IMON1/IMON2 pins provide real-time average current readback and programmable overcurrent limiting without sense resistors. |
| Differential remote sensing | SNSGND1/SNSGND2 pins enable true Kelvin connection to output capacitors - maintains ±1.2% regulation accuracy at 8.5A load. |
| Configurable multi-phase operation | CLKOUT and SYNC pins allow seamless scaling from dual-channel to 4-phase 34A supply using two LT8652SICs - no external timing controller needed. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to 125°C operation with full electrical characterization - suitable for automotive ADAS, infotainment, and body control modules. |
Applications
| Server Power Applications | Automotive ADAS Power Rails |
|---|---|
Use Scenario: Dual-rail power for FPGA I/O banks and core logic in 1U rack servers. IC Role / Device Role / Timing Role: Primary dual-output buck regulator supplying 3.3V/8.5A and 1.0V/8.5A simultaneously from 12V backplane. Use Value: 93.6% efficiency at 6A/3.3V and ultralow 10mVP-P ripple ensure signal integrity for high-speed SerDes interfaces. | Use Scenario: Power delivery to radar processor SoCs and high-speed camera ISPs in autonomous driving systems. IC Role / Device Role / Timing Role: AEC-Q100-qualified dual buck supplying clean 1.2V core and 3.3V I/O rails with CISPR 25 Class 5 EMI compliance. Use Value: Spread-spectrum modulation and integrated bypass caps eliminate need for external EMI filters - reduces BOM cost and board area by >35%. |
| High-Bandwidth Data Converters | Industrial PLC CPU Modules |
Use Scenario: Low-noise analog supply for 16-bit ADCs and RF DACs in test equipment and communications infrastructure. IC Role / Device Role / Timing Role: Dual-channel Silent Switcher providing isolated 1.8V analog and 3.3V digital rails with differential remote sensing. Use Value: <10mVP-P output ripple and <16µA quiescent current preserve SNR and dynamic range while enabling low-power standby modes. | Use Scenario: Main power stage for ARM-based PLC controllers requiring robust operation in factory environments. IC Role / Device Role / Timing Role: Dual 8.5A buck delivering 5V system rail and 3.3V communication interface rail from 24V industrial bus. Use Value: 125°C junction rating and forced continuous mode (FCM) ensure stable operation during extended 85°C ambient temperature cycles. |
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-AEC1-Z | Single-chip dual 8A output; 2.7–16V input; 15µA IQ; no integrated spread spectrum; QFN-32 package. | Lacks Silent Switcher EMI suppression - requires careful layout and external filtering for automotive CISPR 25 compliance. | Select when cost sensitivity outweighs EMI certification requirements and layout space permits added filtering components. |
| TPS546D24RSAR | Dual 10A output; 3–18V input; 25µA IQ; PMBus interface; 6x6mm QFN-40; no integrated bypass caps. | Requires external PMBus host for configuration; higher IQ increases battery drain in always-on systems. | Select when digital telemetry, margining, and fault logging are required - not suitable for analog-only or ultra-low-IQ designs. |
Compared with MPQ8645PGLE-AEC1-Z and TPS546D24RSAR, the LT8652SIV#TRPBF uniquely combines AEC-Q100 qualification, integrated spread-spectrum EMI reduction, and 16µA quiescent current - enabling certified automotive power delivery without layout-dependent filtering or digital overhead.
Availability
LT8652SIV#TRPBF is available at Aetrix Electronics and suitable for server power applications, automotive ADAS systems, high-bandwidth data converter supplies, and industrial PLC CPU modules requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for LT8652SIV#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 industrial markets.
The LT8652SIV#TRPBF belongs to the Silent Switcher® family of high-efficiency, low-EMI DC/DC regulators designed specifically for noise-sensitive applications including PLLs, high-speed data converters, and automotive radar systems.
FAQ
What is the maximum continuous output current per channel for the LT8652SIV#TRPBF?
The LT8652SIV#TRPBF delivers up to 8.5A of continuous output current from each channel under typical thermal conditions (θJA = 18°C/W, 2-layer PCB). With optimized layout and heatsinking, it supports up to 12A per channel - confirmed by the datasheet's "Up to 12A on Either Channel" feature and top FET current limit specification of 22–32A.
Does the LT8652SIV#TRPBF support synchronization with external clock sources?
Yes, the LT8652SIV#TRPBF supports external clock synchronization via its SYNC pin (Pin 17). Applying an external clock signal enables precise phase alignment across multiple regulators. In this mode, CLKOUT (Pin 18) mirrors the SYNC waveform - allowing coordinated 4-phase operation when cascading two LT8652SIV#TRPBF devices.
How does the LT8652SIV#TRPBF achieve ultra-low EMI performance?
The LT8652SIV#TRPBF achieves ultra-low EMI through second-generation Silent Switcher architecture: integrated bypass capacitors minimize high-di/dt loop area, symmetrical layout reduces magnetic field coupling, and spread-spectrum frequency modulation spreads energy across a 20kHz bandwidth - enabling CISPR 25 Class 5 compliance without external filters.
Can the LT8652SIV#TRPBF operate with separate input supplies for each channel?
Yes, the LT8652SIV#TRPBF supports independent inputs: VIN1 (Pins 5–7) powers internal circuitry and Channel 1's high-side switch, while VIN2 (Pins 9–11) powers only Channel 2's high-side switch. VIN1 must be present for Channel 2 to operate, but VIN2 may be derived from a different source - enabling flexible power tree architectures.
What is the purpose of the SNSGND1 and SNSGND2 pins on the LT8652SIV#TRPBF?
The SNSGND1 (Pin 33) and SNSGND2 (Pin 34) pins provide dedicated Kelvin return paths for the FB1 and FB2 feedback networks. By routing these grounds directly to the output capacitor's negative terminal, the LT8652SIV#TRPBF achieves ±1.2% output voltage accuracy at the point-of-load - compensating for PCB trace resistance under high-current conditions.
LT8652SIV#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)
LT8652SIV#TRPBF FAQ
1.How can I place an order for LT8652SIV#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8652SIV#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 LT8652SIV#TRPBF reliable?
The price and inventory of LT8652SIV#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8652SIV#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8652SIV#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8652SIV#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8652SIV#TRPBF?
LT8652SIV#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8652SIV#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 LT8652SIV#TRPBF?
For technical support, including LT8652SIV#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8652SIV#TRPBF requirements.
6.How does Aetrix verify that LT8652SIV#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8652SIV#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 LT8652SIV#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8652SIV#TRPBF?
All LT8652SIV#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8652SIV#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 LT8652SIV#TRPBF part is unused and in its original packaging.
Return procedure for LT8652SIV#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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