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Analog Devices Inc. LT8650SPJV#PBF
- Part No.:
- LT8650SPJV#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 32-TFQFN Exposed Pad
- Datasheet:
-
LT8650SPJV#PBF.pdf
- Description:
- IC REG BUCK ADJ 6A DL 32LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,786
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Product details
Overview
LT8650SPJV#PBF from Analog Devices is a dual-channel synchronous step-down DC/DC regulator delivering up to 6A per channel continuously (12A total) with heat sink, supporting peak loads of 8A per channel. It operates from 3.0V to 42V input, delivers 5V/6A and 3.3V/6A outputs at 2MHz switching frequency, and features Silent Switcher®2 architecture for ultralow EMI in automotive power systems.
For engineers reviewing the LT8650SPJV#PBF datasheet, LT8650SPJV#PBF pinout, LT8650SPJV#PBF application, or LT8650SPJV#PBF equivalent, key selection factors include dual-channel 6A output capability, 40ns minimum on-time for high step-down ratios, AEC-Q100 qualification, exposed-die thermal interface, and external VC pins for fast transient response and current sharing.
Technical Context
The LT8650SPJV#PBF implements peak current mode control with independent error amplifiers per channel, each configurable via VC1/VC2 for internal compensation (2.5µA burst IQ per channel) or external loop tuning. Its second-generation Silent Switcher architecture integrates bypass capacitors directly into the LQFN package to minimize high-frequency current loop area and eliminate layout sensitivity for EMI compliance.
It supports three operating modes: Burst Mode® (6.2µA total quiescent current), forced continuous mode (fixed fSW), and spread spectrum modulation. The SYNC pin enables synchronization to external clocks or inter-chip phase interleaving (e.g., CLKOUT enables 4-phase 24A supply with two devices), while EN/UV1/EN/UV2 provide independent channel enablement and input undervoltage lockout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - supports wide automotive battery transients including cold-crank (4.5V) and load-dump (40V+) |
| Output Current (per channel) | 6A continuous (with heat sink), 8A peak - enables compact dual-rail supplies for ADAS processors and domain controllers |
| Switching Frequency | 300kHz to 3MHz (RT-programmable) - allows optimization for size (2MHz) or efficiency (400kHz) |
| Quiescent Current | 6.2µA in Burst Mode® - sustains >10-year battery life in always-on automotive modules |
| Minimum On-Time | 40ns - enables 12V-to-1V conversion at 2MHz without pulse-skipping |
| Feedback Reference | 0.794V to 0.806V (±0.75%) - ensures tight output regulation across temperature and line |
| Thermal Rating | Junction range –40°C to 150°C - qualified per AEC-Q100 Grade 1 for under-hood applications |
Pinout & Package
LT8650SPJV#PBF uses a 4mm × 6mm, 32-lead LQFN package with exposed die on top (for heat sink attachment) and exposed GND pads (pins 33–38) on the bottom. Thermal performance requires soldering all exposed pads to PCB ground plane and attaching an external heat sink to the top die surface for full 6A/channel operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RT (Pin 1) | Frequency programming input | Resistor to GND sets fSW from 300kHz to 3MHz; critical for EMI filtering and inductor sizing |
| VIN1/VIN2 (Pins 4,5 / 7,8) | Channel 1/2 input power inputs | Independent inputs allow split-rail or redundant sourcing; VIN1 must be present for both channels |
| EN/UV1 & EN/UV2 (Pins 11,12) | Channel enable/undervoltage inputs | Hysteretic thresholds (0.74V/0.77V) support programmable input UVLO using resistor dividers |
| PG1 & PG2 (Pins 14,15) | Power good open-drain outputs | Assert low until FBx is within ±7.5% of target; pulled low during UVLO, thermal shutdown, or disable |
| VC1 & VC2 (Pins 27,32) | Error amplifier outputs | Enable external compensation for fast transient response or current sharing between parallel channels |
| CLKOUT (Pin 17) | Synchronization output | Provides 90° phase-shifted 50% duty cycle clock in FCM; enables multi-phase interleaving up to 4-phase |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher®2 architecture | Integrates VIN1/VIN2/VCC/BST bypass capacitors internally - eliminates layout-dependent EMI and removes need for external high-frequency caps |
| Exposed die thermal interface | Top-side silicon die exposed for direct heat sink mounting - reduces θJC-TOP to 0.93°C/W, enabling 6A/channel without airflow |
| Dual independent VC pins | Allow per-channel loop compensation and active current sharing - supports redundant or paralleled configurations with matched load distribution |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +150°C junction operation - meets automotive reliability requirements for engine control, ADAS, and infotainment |
| Spread spectrum modulation | Reduces peak radiated EMI by >10dB - helps pass CISPR 25 Class 5 limits without additional filtering components |
Applications
| Advanced Driver Assistance Systems (ADAS) | Automotive Infotainment Processors |
|---|---|
Use Scenario: Powering radar SoCs requiring tightly regulated 5V and 3.3V rails with ultra-low noise and fast transient response during sensor fusion processing. IC Role / Device Role / Timing Role: Dual-channel step-down regulator providing independent, synchronized, low-ripple power with Burst Mode® for sleep-state efficiency. Use Value: 6.2µA quiescent current extends vehicle battery life during parked surveillance; 40ns min on-time maintains regulation during rapid voltage scaling. | Use Scenario: Supplying display controller, GPU, and audio DSP in head-unit systems where EMI must meet strict automotive EMC standards. IC Role / Device Role / Timing Role: Primary power management IC delivering clean, stable dual outputs with integrated EMI suppression and thermal robustness. Use Value: Silent Switcher®2 eliminates need for external EMI filters; exposed die + heat sink enables 12A total output in space-constrained dash layouts. |
| Electric Vehicle Battery Management Units | Automotive Domain Controllers |
Use Scenario: Generating auxiliary rails for isolated CAN FD gateways and cell monitoring ICs in high-voltage battery packs. IC Role / Device Role / Timing Role: High-input-voltage dual buck converter with 42V absolute max rating and AEC-Q100 qualification for functional safety subsystems. Use Value: Withstands 40V load-dump transients; PG1/PG2 signals enable safe power sequencing and fault reporting to MCU. | Use Scenario: Powering zonal compute modules integrating Ethernet switch, microcontroller, and security enclave in software-defined vehicles. IC Role / Device Role / Timing Role: Dual-output regulator with CLKOUT synchronization and VC-based current sharing for scalable multi-rail architectures. Use Value: Enables 4-phase 24A supply when paired with second LT8650SPJV#PBF - improves dynamic load handling and reduces output ripple by √4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel synchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3310S | Single-channel 10A monolithic buck; no dual-output integration; 5V/3.3V requires two devices | Lacks integrated dual-channel architecture and CLKOUT synchronization capability | Choose when higher per-channel current (>6A) is required and board space allows separate regulators |
| MPQ4420AGL-A | Dual-channel 2A buck; lower current rating; no Silent Switcher EMI reduction or AEC-Q100 qualification | Not suitable for automotive under-hood use; lacks exposed die thermal path and spread spectrum | Consider only for cost-sensitive non-automotive industrial applications below 2A/channel |
Compared with LTC3310S and MPQ4420AGL-A, the LT8650SPJV#PBF uniquely combines dual 6A outputs, AEC-Q100 qualification, integrated EMI suppression, and thermal design for automotive-grade reliability - eliminating the need for discrete EMI filters or external thermal solutions.
Availability
LT8650SPJV#PBF is available at Aetrix Electronics and suitable for automotive ADAS systems, electric vehicle battery management units, and domain controller power supplies requiring stable component supply, long lifecycle support, and AEC-Q100-compliant performance.
Supply support for LT8650SPJV#PBF 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 automotive, industrial, communications, and healthcare markets.
The LT8650SPJV#PBF belongs to Analog Devices' Power by Linear™ family of high-efficiency, low-EMI DC/DC regulators designed specifically for demanding automotive and industrial power applications where reliability, thermal performance, and electromagnetic compatibility are critical.
FAQ
What is the maximum continuous output current per channel for the LT8650SPJV#PBF?
The LT8650SPJV#PBF delivers up to 6A of continuous output current from each channel when used with an attached heat sink and proper PCB thermal design. Without a heat sink, derating applies - e.g., ~4A per channel at 2MHz with 200LFM airflow. Peak capability reaches 8A per channel for short durations under optimized thermal conditions. This rating is validated per the DC2407A demo board test setup with 12V input and 5V/3.3V outputs.
Does the LT8650SPJV#PBF require external compensation components?
The LT8650SPJV#PBF supports both internal and external compensation. Connecting VC1 and VC2 to VCC enables default internal compensation with 2.5µA burst-mode quiescent current per channel. For faster transient response or current sharing, external RC networks can be connected to VC1/VC2 - increasing burst IQ to ~50µA per channel. The datasheet provides recommended component values for common output configurations.
How does the Silent Switcher®2 architecture reduce EMI in the LT8650SPJV#PBF?
The LT8650SPJV#PBF integrates ceramic bypass capacitors directly into the LQFN package for VIN1, VIN2, VCC, BST1, and BST2 nodes. This minimizes high-frequency current loop area and eliminates PCB layout sensitivity - enabling consistent CISPR 25 Class 5 radiated emissions compliance without added filter components. Spread spectrum modulation further lowers peak EMI by >10dB.
Can the LT8650SPJV#PBF synchronize with other switching regulators?
Yes. The LT8650SPJV#PBF supports full synchronization via its SYNC pin (Pin 16) and CLKOUT pin (Pin 17). An external clock applied to SYNC forces the device into forced continuous mode and aligns switching edges. CLKOUT outputs a 90° phase-shifted square wave, enabling precise 4-phase interleaving when two LT8650SPJV#PBF devices are cascaded - reducing input/output ripple and improving thermal distribution.
Is the LT8650SPJV#PBF qualified for automotive applications?
Yes. The LT8650SPJV#PBF is AEC-Q100 qualified for Grade 1 (–40°C to +125°C ambient / –40°C to +150°C junction) and manufactured in an automotive-grade flow. It meets stringent reliability, ESD, and transient immunity requirements for under-hood and cabin applications. The #PBF suffix denotes lead-free, RoHS-compliant packaging with Au finish and MSL3 moisture sensitivity rating.
LT8650SPJV#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Silent Switcher®2
- Package/Case:
- 32-TFQFN Exposed Pad
- Packaging:
- Tray
- 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:
- 6A
- Frequency - Switching:
- 300kHz ~ 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-LQFN (6x4)
LT8650SPJV#PBF FAQ
1.How can I place an order for LT8650SPJV#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8650SPJV#PBF 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 LT8650SPJV#PBF reliable?
The price and inventory of LT8650SPJV#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8650SPJV#PBF is usually 5 days.
3.What payment methods are accepted for LT8650SPJV#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8650SPJV#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8650SPJV#PBF?
LT8650SPJV#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8650SPJV#PBF 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 LT8650SPJV#PBF?
For technical support, including LT8650SPJV#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8650SPJV#PBF requirements.
6.How does Aetrix verify that LT8650SPJV#PBF is sourced from the original manufacturer or authorized distributors?
All LT8650SPJV#PBF 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 LT8650SPJV#PBF meets industry standards.
7.What is the process for return or replacement of LT8650SPJV#PBF?
All LT8650SPJV#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8650SPJV#PBF, 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 LT8650SPJV#PBF part is unused and in its original packaging.
Return procedure for LT8650SPJV#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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