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Analog Devices Inc. LT8392EFE#PBF
- Part No.:
- LT8392EFE#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LT8392EFE#PBF.pdf
- Description:
- 60V SYNC 4-SWITCH BUCK-BOOST LED
- Quantity:
- Payment:
- Shipping:
Inventory:119
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Product details
Overview
LT8392EFE#PBF from Analog Devices is a synchronous 4-switch buck-boost DC/DC controller supporting input voltages from 3V to 60V and output voltages from 1V to 60V, with ±1.5% VOUT accuracy, 98% peak efficiency at 12V/8A, and spread-spectrum EMI reduction. It operates across buck, buck-boost, and boost regions with seamless transitions and is used in automotive voltage regulators and battery/supercapacitor chargers.
For engineers reviewing the LT8392EFE#PBF datasheet, LT8392EFE#PBF pinout, LT8392EFE#PBF application, or LT8392EFE#PBF equivalent, key selection criteria include its 28-pin TSSOP package with exposed pad, 150kHz–650kHz adjustable switching frequency, integrated bootstrap diodes, and dual current-sense monitoring for VIN or VOUT regulation in wide-input industrial power systems.
Technical Context
The LT8392EFE#PBF implements Analog Devices' proprietary peak-buck/peak-boost current mode control using a single inductor current sense resistor (LSP/LSN) and separate ISP/ISN inputs for input/output current regulation. Its control logic dynamically selects between four operating states-buck, two buck-boost sub-modes, and boost-based on real-time VIN/VOUT ratio, with hysteresis to prevent mode chattering.
It features dual error amplifiers (EA1/EA2) diode-OR'd at VC to enable smooth CV/CC transition, internal slope compensation, and independent gate drivers for all four MOSFETs (TG1/BG1/TG2/BG2), with integrated bootstrap diodes on BST1/BST2 and programmable soft-start via SS pin capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 3V to 60V - supports automotive cold-crank (3V) and load-dump (60V) transients without external protection. |
| VOUT Range | 1V to 60V - enables single-controller solutions for 5V, 12V, 24V, and 48V systems with ±1.5% regulation accuracy. |
| Switching Frequency | 150kHz–650kHz adjustable via RT resistor - allows optimization of size vs. efficiency and EMI compliance. |
| Current Sense Accuracy | ±4% for ISP/ISN monitoring - enables precise input or output current limiting in battery charging and power delivery. |
| Efficiency | 98% at 12V/8A - reduces thermal load in high-power 96W applications such as infotainment power supplies. |
| Package | 28-Lead TSSOP with exposed pad - provides θJC = 5°C/W thermal resistance for reliable operation up to 125°C junction temperature. |
| Spread Spectrum | ±15% triangle modulation - lowers peak EMI by spreading energy across frequency band without external components. |
Pinout & Package
LT8392EFE#PBF is housed in a 28-lead plastic TSSOP package with exposed pad (Pin 29), which must be soldered to PCB ground for thermal and electrical performance. θJA = 30°C/W, θJC = 5°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO | Enable and undervoltage lockout input | Shuts down IC below 0.3V; enables at 1.220V falling threshold with 2.5µA hysteresis current for precise UVLO programming. |
| FB | Voltage feedback input | Regulates VOUT to 1.00V reference; triggers PGOOD when within ±8% and fault protection if VFB < 0.25V or > 1.08V. |
| ISP/ISN | Input/output current sense differential inputs | Supports Kelvin sensing of RIS; enables accurate ±4% current regulation for battery charge control or input current limiting. |
| TG1/BG1/TG2/BG2 | N-channel MOSFET gate drivers | Drive top/bottom switches in buck and boost legs; TG1/BG1 operate in buck region, TG2/BG2 in boost region. |
| LSP/LSN | Inductor current sense differential inputs | Provide primary current feedback for peak-buck/peak-boost control; require Kelvin connection for accuracy. |
| SYNC/SPRD | Frequency sync or spread-spectrum select | Ground = fixed frequency; INTVCC = ±15% triangle spread spectrum; external clock = synchronization to system master. |
Key Features
| Feature | Design Value |
|---|---|
| 4-switch single-inductor architecture | Eliminates need for separate buck + boost controllers and dual inductors - reduces BOM count and board area by >40%. |
| Seamless buck/buck-boost/boost transition | Zero-output-voltage glitch during VIN crossing VOUT - critical for powering sensitive microcontrollers in automotive start-stop systems. |
| Integrated bootstrap diodes on BST1/BST2 | Removes two external Schottky diodes per channel - simplifies layout and improves reliability in high-temperature environments. |
| Programmable fault response | SS pin resistor sets short-circuit behavior: hiccup (no resistor), latch-off (499kΩ), or keep-running (100kΩ) - enables application-specific safety policy. |
| VOUT disconnected from VIN during shutdown | Prevents backfeed from output to input rail - essential for isolated power domains and battery backup systems. |
Applications
| Automotive Voltage Regulator | Battery Charger for 12V/24V Systems |
|---|---|
|
Use Scenario: Powering ADAS ECUs and infotainment head units from vehicle battery with cold-crank (3V) and load-dump (60V) immunity. IC Role / Device Role / Timing Role: Primary buck-boost controller regulating stable 5V/12V output regardless of battery voltage fluctuations. Use Value: Maintains uninterrupted operation during engine cranking and alternator transients without brownout or reset. |
Use Scenario: Charging lead-acid or LiFePO₄ batteries in commercial vehicles using alternator or auxiliary power source. IC Role / Device Role / Timing Role: Constant-current/constant-voltage charger with ISP/ISN current monitoring and programmable charge termination. Use Value: Enables precise CC/CV profile with ±4% current accuracy and thermal foldback via junction temperature monitoring. |
| Industrial 24V/48V Power Supply | Supercapacitor Backup System |
|
Use Scenario: Generating regulated 24V output from wide-range industrial DC bus (12–60V) in factory automation equipment. IC Role / Device Role / Timing Role: High-efficiency (98%) buck-boost regulator with spread-spectrum EMI reduction for EMC-compliant designs. Use Value: Meets CISPR-22 Class B conducted/radiated emissions without added filtering, reducing system cost and footprint. |
Use Scenario: Bidirectional power management between main supply and supercapacitor bank for UPS and memory backup. IC Role / Device Role / Timing Role: Controller managing charge/discharge paths with reverse-current protection and seamless mode transitions. Use Value: Prevents capacitor overvoltage during charge and ensures zero-voltage glitch during switchover to backup power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3780EFE#PBF | Fixed 200kHz–600kHz frequency; no spread spectrum; requires external bootstrap diodes; 100% duty cycle not supported. | Limited EMI mitigation capability; less suitable for automotive EMC-critical designs requiring low peak emissions. | Choose LTC3780EFE#PBF only when legacy design reuse or lower cost outweighs EMI and integration advantages of LT8392EFE#PBF. |
| MPQ4332GJ-AEC1-Z | Monolithic 3.5A solution (integrated FETs); max 36V VIN; no ISP/ISN current monitor; no spread spectrum; QFN-16 package. | Not scalable beyond ~40W; lacks input/output current regulation needed for battery charging or power budgeting. | Choose MPQ4332GJ-AEC1-Z for space-constrained, lower-power (<40W) automotive modules where full integration justifies trade-offs in flexibility and monitoring. |
Compared with LTC3780EFE#PBF and MPQ4332GJ-AEC1-Z, the LT8392EFE#PBF delivers superior EMI performance via built-in spread spectrum, higher power scalability (96W+), and dual current-sense capability enabling both input-limited and output-regulated operation - making it optimal for next-generation automotive and industrial power architectures.
Availability
LT8392EFE#PBF is available at Aetrix Electronics and suitable for automotive voltage regulation, industrial 24V/48V power supplies, and battery/supercapacitor charging systems requiring stable component supply and long-term lifecycle support.
Supply support for LT8392EFE#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT8392EFE#PBF belongs to Analog Devices' Power by Linear™ controller family, designed specifically for high-efficiency, wide-input-range DC/DC conversion in harsh environments where reliability, EMI control, and seamless mode transitions are critical.
FAQ
What is the maximum input voltage rating for the LT8392EFE#PBF?
The LT8392EFE#PBF has an absolute maximum VIN rating of 60V, with guaranteed operation across 3V to 60V input range. This supports automotive applications including cold-crank (down to 3V) and load-dump (up to 60V) conditions without external clamping, provided EXTVCC ≥ 4.5V for proper LDO biasing.
Does the LT8392EFE#PBF support both input and output current regulation?
Yes, the LT8392EFE#PBF supports both input and output current regulation via dedicated ISP/ISN pins with ±4% accuracy. The CTRL pin programs the current sense threshold from 0mV to 50mV, enabling flexible use cases such as input current limiting in battery chargers or output current control in constant-current LED drivers.
How does the LT8392EFE#PBF achieve low EMI performance?
The LT8392EFE#PBF achieves low EMI through integrated ±15% triangle spread-spectrum frequency modulation (enabled by tying SYNC/SPRD to INTVCC), eliminating the need for external EMI filters. Its 4-switch architecture also minimizes input/output ripple compared to cascaded buck+boost solutions, further reducing conducted emissions.
What package type and thermal characteristics does the LT8392EFE#PBF use?
The LT8392EFE#PBF uses a 28-lead plastic TSSOP package with exposed pad (Pin 29 = GND). It features θJC = 5°C/W and θJA = 30°C/W, enabling reliable operation up to 125°C junction temperature. The exposed pad must be soldered to PCB ground for optimal thermal and electrical performance.
Can the LT8392EFE#PBF operate in discontinuous conduction mode (DCM) at light loads?
Yes, the LT8392EFE#PBF automatically enters pulse-skipping mode at light loads to maintain regulation while improving efficiency. In buck region, it disables reverse current flow by turning off BG1 during (B+D) phase; in boost region, it disables BD2 during (A+D) phase - preventing energy loss and maintaining stability.
LT8392EFE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Number of Outputs:
- 1
- Output Phases:
- 2
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 60V
- Frequency - Switching:
- 400kHz
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Enable, Frequency Control, Power Good, Soft Start
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSSOP-EP
LT8392EFE#PBF FAQ
1.How can I place an order for LT8392EFE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8392EFE#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 LT8392EFE#PBF reliable?
The price and inventory of LT8392EFE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8392EFE#PBF is usually 5 days.
3.What payment methods are accepted for LT8392EFE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8392EFE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8392EFE#PBF?
LT8392EFE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8392EFE#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 LT8392EFE#PBF?
For technical support, including LT8392EFE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8392EFE#PBF requirements.
6.How does Aetrix verify that LT8392EFE#PBF is sourced from the original manufacturer or authorized distributors?
All LT8392EFE#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 LT8392EFE#PBF meets industry standards.
7.What is the process for return or replacement of LT8392EFE#PBF?
All LT8392EFE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8392EFE#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 LT8392EFE#PBF part is unused and in its original packaging.
Return procedure for LT8392EFE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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