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Analog Devices Inc. LT8650SEV#TRPBF
- Part No.:
- LT8650SEV#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 32-TFQFN Exposed Pad, 28 Leads
- Datasheet:
-
LT8650SEV#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 4A DL 32LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,711
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Product details
Overview
LT8650SEV#TRPBF from Analog Devices is a dual-channel synchronous step-down DC/DC regulator delivering up to 4A per channel continuously (6A peak), operating from 3.0V to 42V input, with 6.2µA quiescent current in Burst Mode and integrated Silent Switcher®2 architecture for ultralow EMI. It supports independent 5V/4A and 3.3V/4A outputs at 2MHz switching frequency in automotive and industrial power supplies.
For engineers reviewing the LT8650SEV#TRPBF datasheet, LT8650SEV#TRPBF pinout, LT8650SEV#TRPBF application, or LT8650SEV#TRPBF equivalent, key selection criteria include dual-channel 42V input capability, 40ns minimum on-time for high step-down ratios, AEC-Q100 qualification, external VC compensation for fast transient response, and CLKOUT-enabled 4-phase synchronization.
Technical Context
The LT8650SEV#TRPBF implements peak current mode control with dual independent error amplifiers (VC1/VC2), enabling precise loop compensation and current sharing. Its second-generation Silent Switcher architecture integrates internal bypass capacitors on VIN1, VIN2, VCC, BST1, and BST2 to minimize high-frequency current loop area and eliminate PCB layout sensitivity for EMI compliance.
It supports three operating modes: Burst Mode (6.2µA IQ), forced continuous mode (fixed fSW), and spread spectrum modulation. The RT pin programs switching frequency from 300kHz to 3MHz; CLKOUT enables phase synchronization of multiple ICs for higher-current 4-phase supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - supports wide-range industrial and automotive battery inputs including 12V, 24V, and 36V systems. |
| Output Current per Channel | 4A continuous, 6A peak - enables dual-rail power delivery without external current boosting. |
| Quiescent Current | 6.2µA in Burst Mode - sustains ultra-low power operation in always-on automotive modules. |
| Switching Frequency | 300kHz–3MHz (RT-programmable) - allows optimization of size vs. efficiency; 2MHz enables compact 1µH inductors. |
| Minimum On-Time | 40ns - supports high step-down ratios (e.g., 42V→3.3V) at 2MHz without pulse-skipping instability. |
| Feedback Reference | 0.794V–0.806V - tight 0.8V reference ensures ±1% output voltage accuracy across temperature and load. |
| Thermal Rating | –40°C to +125°C junction - qualified per AEC-Q100 Grade E for under-hood automotive applications. |
Pinout & Package
LT8650SEV#TRPBF uses a 32-pin LQFN package (6mm × 4mm × 0.94mm) with exposed thermal pad (pins 33–38) soldered to PCB ground for low θJA (16.18°C/W). Pin functions are validated per Analog Devices Rev. D datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 (Pins 4,5) | Channel 1 input supply | Must be ≥3V; powers internal circuitry and top switch; requires local ceramic bypass. |
| VIN2 (Pins 7,8) | Channel 2 input supply | Independent input path; can differ from VIN1 but requires VIN1 presence to operate. |
| EN/UV1 & EN/UV2 (Pins 11,12) | Enable/undervoltage lockout | Hysteretic threshold (0.74V/0.77V) enables programmable input UVLO via resistor divider. |
| PG1 & PG2 (Pins 14,15) | Power good open-drain outputs | Assert high when FBx is within ±7.5% of regulation; pulled low during faults or shutdown. |
| VC1 & VC2 (Pins 27,32) | Error amplifier outputs | Support external compensation for fast transient response or internal compensation (tie to VCC) for lowest IQ. |
| CLKOUT (Pin 17) | Phase-synchronized clock output | Provides 90°-phase-shifted 50% duty cycle signal for 4-phase interleaving with other LT8650S units. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher®2 Architecture | Integrated bypass capacitors on VIN1/VIN2/VCC/BST pins reduce radiated EMI by >30dB, eliminating layout-dependent filtering. |
| Dual Independent Compensation | Separate VC1/VC2 pins allow channel-specific loop tuning and active current sharing between channels or ICs. |
| 4-Phase Synchronization Capability | CLKOUT pin enables precise phase alignment of up to four LT8650S devices for 16A ripple-canceling supplies. |
| AEC-Q100 Qualified | Qualified to Grade E (–40°C to +125°C) with full automotive reliability testing - suitable for ADAS, infotainment, and body control modules. |
| Ultralow Dropout Performance | 40ns min on-time and fast 100ns switching edges maintain regulation under high-duty-cycle conditions (e.g., 42V→5V @ 2MHz). |
Applications
| Automotive ADAS Power Supply | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powers radar sensor SoC (5V core) and interface logic (3.3V I/O) in compact front-end module. IC Role / Device Role / Timing Role: Dual-output buck regulator providing isolated, low-noise rails with synchronized switching to suppress EMI in RF-sensitive zones. Use Value: Silent Switcher®2 meets CISPR25 Class 5 radiated emission limits without added ferrites or shielding, reducing BOM cost and board area. | Use Scenario: Supplies fieldbus controller (5V) and isolated digital I/O drivers (3.3V) in DIN-rail mounted programmable logic controller. IC Role / Device Role / Timing Role: High-input-voltage dual buck converter handling 24VDC industrial bus with robust UVLO and thermal protection. Use Value: 42V max input withstands 36V transients; AEC-Q100 qualification ensures long-term reliability in harsh factory environments. |
| Medical Imaging Sensor Hub | Telecom Remote Radio Unit |
Use Scenario: Delivers clean 5V and 3.3V to CMOS image sensor array and FPGA-based preprocessing unit in portable ultrasound probe. IC Role / Device Role / Timing Role: Low-quiescent-current dual regulator maintaining standby power integrity while enabling rapid wake-up from Burst Mode. Use Value: 6.2µA IQ extends battery life; <10mVP-P output ripple prevents noise coupling into analog signal chain. | Use Scenario: Generates bias rails for GaN power amplifiers (5V gate drive) and baseband ASICs (3.3V logic) in 5G small cell remote radio head. IC Role / Device Role / Timing Role: High-efficiency, high-frequency dual buck with spread spectrum modulation to meet stringent FCC Part 15 spectral mask requirements. Use Value: Spread spectrum reduces peak EMI by 10dB; 2MHz operation shrinks passive size for dense RF module integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8650SIV#TRPBF | Same electrical specs; rated for –40°C to +125°C junction (identical temp grade), but marked for industrial use only - no AEC-Q100 documentation provided. | Not certified for automotive safety-critical systems; lacks automotive reliability reports and controlled manufacturing traceability. | Select LT8650SEV#TRPBF when AEC-Q100 compliance, automotive PPAP support, and guaranteed automotive-grade screening are required. |
| MPQ4436-AEC1-Z | Single-channel 6A buck; no dual-output capability; 2.5µA IQ; 3.8V–60V input; no CLKOUT or VC pin for synchronization/compensation. | Requires two separate ICs to replicate dual-rail functionality; lacks phase-sync capability for multi-phase scaling. | Choose only if single-rail design suffices and extended 60V input range outweighs loss of dual-channel integration and EMI advantages. |
Compared with LT8650SIV#TRPBF, the LT8650SEV#TRPBF provides documented automotive qualification and supply-chain traceability; versus MPQ4436-AEC1-Z, it delivers true dual-channel integration with synchronized operation, lower system-level EMI, and superior transient response via VC compensation - critical for space-constrained, noise-sensitive applications.
Availability
LT8650SEV#TRPBF is available at Aetrix Electronics and suitable for automotive ADAS subsystems, industrial PLC power rails, medical imaging sensor hubs, and telecom remote radio units requiring stable component supply, AEC-Q100 compliance, and ultralow EMI performance.
Supply support for LT8650SEV#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, communications, and automotive markets.
The LT8650S product line delivers dual-channel, high-input-voltage, ultralow-EMI synchronous buck regulators targeting automotive and industrial applications where compact size, efficiency across light-to-heavy loads, and regulatory EMI compliance are mandatory.
FAQ
What is the maximum input voltage rating for the LT8650SEV#TRPBF?
The LT8650SEV#TRPBF has an absolute maximum input voltage rating of 42V on both VIN1 and VIN2 pins. It operates over a functional input range of 3.0V to 42V, supporting 12V, 24V, and 36V industrial and automotive battery systems. Exceeding 42V may cause permanent damage per Absolute Maximum Ratings.
Does the LT8650SEV#TRPBF support synchronization with external clock sources?
Yes, the LT8650SEV#TRPBF supports external clock synchronization via its SYNC pin (Pin 16). Applying a clock signal to SYNC forces the device into forced continuous mode and aligns its switching edges to the external source. The CLKOUT pin (Pin 17) then mirrors that frequency and phase, enabling precise multi-phase interleaving of multiple LT8650SEV#TRPBF units.
How does the LT8650SEV#TRPBF achieve ultralow EMI performance?
The LT8650SEV#TRPBF achieves ultralow EMI through second-generation Silent Switcher®2 architecture, which integrates ceramic bypass capacitors internally on VIN1, VIN2, VCC, BST1, and BST2. This minimizes high-frequency current loop area and eliminates PCB layout sensitivity - enabling CISPR25 Class 5 compliance without external EMI filters or shielding in typical layouts.
Can the LT8650SEV#TRPBF deliver 6A from a single channel while the other channel is inactive?
Yes, the LT8650SEV#TRPBF supports up to 6A peak output current on either channel independently. When one channel is disabled (e.g., EN/UVx = low), the remaining active channel can deliver up to 6A, provided thermal limits and input voltage conditions are met. Continuous operation at 6A requires adequate PCB copper area and airflow to maintain junction temperature ≤125°C.
What is the purpose of the TEMP pin on the LT8650SEV#TRPBF?
TEMP (Pin 13) outputs a voltage proportional to die junction temperature (250mV at 25°C, +9.5mV/°C slope). It is valid only in forced continuous mode across full load range; in Burst Mode, readings are unreliable at light loads. The pin enables real-time thermal monitoring for system-level fault detection and derating strategies in automotive and industrial applications.
LT8650SEV#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Silent Switcher®2
- Package/Case:
- 32-TFQFN Exposed Pad, 28 Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.6V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 42V
- Current - Output:
- 4A
- Frequency - Switching:
- 300kHz ~ 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-LQFN (6x4)
LT8650SEV#TRPBF FAQ
1.How can I place an order for LT8650SEV#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8650SEV#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 LT8650SEV#TRPBF reliable?
The price and inventory of LT8650SEV#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8650SEV#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8650SEV#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8650SEV#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8650SEV#TRPBF?
LT8650SEV#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8650SEV#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 LT8650SEV#TRPBF?
For technical support, including LT8650SEV#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8650SEV#TRPBF requirements.
6.How does Aetrix verify that LT8650SEV#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8650SEV#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 LT8650SEV#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8650SEV#TRPBF?
All LT8650SEV#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8650SEV#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 LT8650SEV#TRPBF part is unused and in its original packaging.
Return procedure for LT8650SEV#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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