My Inquiry
My Account
Analog Devices Inc. LT8392EUFD#TRPBF
- Part No.:
- LT8392EUFD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
LT8392EUFD#TRPBF.pdf
- Description:
- 60V SYNC 4-SWITCH BUCK-BOOST LED
- Quantity:
- Payment:
- Shipping:
Inventory:1,693
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT8392EUFD#TRPBF from Analog Devices is a synchronous 4-switch buck-boost DC/DC controller supporting 3V–60V input and 1V–60V output, ±1.5% VOUT accuracy, 150kHz–650kHz adjustable switching frequency, and spread-spectrum EMI reduction. It enables seamless VIN-above/VIN-below/VIN-equal-VOUT operation in automotive voltage regulators and battery chargers.
For engineers reviewing the LT8392EUFD#TRPBF datasheet, LT8392EUFD#TRPBF pinout, LT8392EUFD#TRPBF application, or LT8392EUFD#TRPBF equivalent, key selection criteria include its peak-buck/peak-boost current mode control architecture, dual current sense (LSP/LSN + ISP/ISN), integrated bootstrap diodes, EXTVCC support for efficiency optimization, and QFN-28 (4mm × 5mm) thermal performance (θJC = 3.4°C/W).
Technical Context
The LT8392EUFD#TRPBF implements Analog Devices' proprietary peak-buck/peak-boost current mode control using a single inductor current sense resistor (LSP/LSN) and independent ISP/ISN inputs for input/output current regulation. Its four-state operation-(1) peak-buck in buck region, (2) peak-buck in buck-boost region, (3) peak-boost in buck-boost region, and (4) peak-boost in boost region-enables smooth transitions without audible noise or regulation glitches.
Control logic dynamically selects between buck and boost paths based on real-time VIN/VOUT ratio, with hysteresis to prevent mode chattering. The VC error amplifier output drives both buck (A3) and boost (A4) comparators via diode-OR, while EA1 and EA2 gains are balanced to ensure stable CV/CC crossover during battery charging or supercapacitor pre-charge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 60V (requires EXTVCC ≥ 4.5V below 4V input); supports cold-crank automotive (4.5V–60V) and wide-range industrial supplies. |
| Output Voltage Range | 1V to 60V with ±1.5% accuracy over –40°C to 125°C; enables programmable CV/CC battery charge profiles. |
| Switching Frequency | 150kHz–650kHz (adjustable via RT resistor) or ±15% triangle spread spectrum (SYNC/SPRD = INTVCC); reduces EMI peak emissions by >10dB. |
| Current Sense Accuracy | ±4% for input/output current monitoring (ISP/ISN); supports precise power limiting and telemetry in telecom rectifiers. |
| Efficiency | Up to 98% at 12V/8A (96W); achieved via low-RDS(on) gate drivers (TG1/TG2: 2.6Ω pull-up; BG1/BG2: 3.2Ω pull-up) and integrated bootstrap diodes. |
| Package Thermal Resistance | θJC = 3.4°C/W (QFN-28, 4mm × 5mm); enables high-power density designs with direct PCB copper thermal sinking via exposed pad. |
| Fault Protection | Output short-circuit response configurable as hiccup, latch-off, or keep-running via SS pin resistor; eliminates need for external fault logic. |
Pinout & Package
LT8392EUFD#TRPBF uses a 28-lead (4mm × 5mm) plastic QFN package with exposed GND pad (Pin 29) requiring soldering to PCB thermal plane. θJA = 43°C/W, θJC = 3.4°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW1, SW2 | Buck and boost switch nodes | Connect to external high-side N-MOSFET sources; require low-inductance layout to minimize shoot-through risk and EMI. |
| TG1, TG2 | Buck/boost top gate drivers | Drive N-MOSFET gates with swing from SWx to BSTx; support bootstrap operation up to 66V BSTx rating. |
| BG1, BG2 | Buck/boost bottom gate drivers | Drive N-MOSFET gates from GND to INTVCC (5V); enable synchronous rectification for high efficiency. |
| LSP, LSN | Buck-side inductor current sense | Kelvin-connected to RSENSE for accurate peak-current-mode control across all operating regions. |
| ISP, ISN | Input/output current sense | Kelvin-connected to RIS for ±4% accurate current regulation in battery charge or load protection applications. |
| FB | Voltage feedback input | Regulates VOUT to 1.00V reference; ±0.2% line/load regulation enables precision CV loops. |
| CTRL | Current limit programming | Accepts 0.25V–1.35V analog input to linearly scale ISP/ISN threshold from 0mV to 50mV full-scale. |
| PGOOD | Open-drain power-good flag | Pulled low when FB deviates >±8% from target; used for system sequencing and fault reporting. |
| SYNC/SPRD | Frequency control | GND = fixed frequency; INTVCC = ±15% spread spectrum; external clock = synchronization to system master. |
| EXTVCC | Secondary INTVCC supply | Enables higher efficiency by powering INTVCC LDO from regulated rail instead of VIN during high-input operation. |
Key Features
| Feature | Design Value |
|---|---|
| 4-switch single-inductor architecture | Eliminates need for separate buck + boost converters; reduces BOM count, board area, and magnetic component cost by >40% vs dual-converter solutions. |
| Proprietary peak-buck/peak-boost control | Ensures continuous conduction and zero-crossing transition between buck/boost modes; prevents output voltage dip or overshoot during VIN/VOUT crossover. |
| Integrated bootstrap diodes | Reduces external component count by two Schottky diodes per channel; simplifies layout and improves reliability in high-vibration environments. |
| VOUT disconnected from VIN during shutdown | Prevents backfeed into input rail; critical for battery-powered systems where load isolation preserves standby energy. |
| Configurable short-circuit response | SS pin resistor selects hiccup (no resistor), latch-off (499kΩ), or keep-running (100kΩ); enables application-specific safety compliance without firmware. |
Applications
| Automotive Voltage Regulation | Battery Charging System |
|---|---|
Use Scenario: Regulating 12V nominal battery rail to stable 5V/3.3V for ADAS ECUs during cold-crank (4.5V) and load-dump (60V) transients. IC Role / Device Role / Timing Role: Primary buck-boost controller managing seamless mode transitions and maintaining <±1.5% output accuracy across 4.5V–60V input range. Use Value: Eliminates need for pre-regulator stages; supports ASIL-B functional safety via PGOOD flag and latch-off fault mode. |
Use Scenario: Charging 12V lead-acid or 4S Li-ion packs from variable solar or vehicle alternator sources. IC Role / Device Role / Timing Role: Dual-loop CV/CC controller using FB for voltage regulation and ISP/ISN for current regulation with ±4% accuracy. Use Value: Enables full-featured constant-current/constant-voltage charge profile without external op-amps or DACs. |
| Industrial Telecom Rectifier | High-Frequency Portable Power |
Use Scenario: Converting –48V telecom input to isolated 12V/24V outputs in distributed power architectures. IC Role / Device Role / Timing Role: High-efficiency (98%) buck-boost front-end controller with spread-spectrum EMI reduction meeting CISPR-22 Class B limits. Use Value: Reduces EMI filter size/cost by >30% versus fixed-frequency alternatives; supports hot-swap capability via controlled soft-start. |
Use Scenario: Powering portable test equipment from single-cell Li-ion (3V–4.2V) to deliver regulated 5V/12V outputs. IC Role / Device Role / Timing Role: Wide-input buck-boost controller enabling single-battery operation across full discharge curve without brownout. Use Value: Extends runtime by 22% vs conventional buck-only solutions; QFN-28 package supports compact, fanless thermal design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8705EFE#TRPBF | Single-ended 4-switch architecture; no ISP/ISN current monitor; fixed 100kHz–400kHz sync range; requires external bootstrap diodes. | Lacks integrated current monitoring for CC charging; suited for simpler voltage-regulation-only use cases. | Select when ISP/ISN telemetry is unnecessary and lower BOM cost is prioritized over design flexibility. |
| MPQ4332GR-AEC1 | Automotive-grade 3.5V–60V buck-boost controller; 200kHz–2.2MHz sync range; no spread spectrum; only VOUT current sense (no VIN sense). | Supports AEC-Q100 Grade 1 but lacks dual current sensing and spread-spectrum EMI reduction. | Select for cost-sensitive automotive infotainment where EMI requirements are less stringent and only output current limiting is needed. |
Compared with LT8392EUFD#TRPBF, LT8705EFE#TRPBF omits ISP/ISN monitoring and spread spectrum, reducing feature set but lowering unit cost; MPQ4332GR-AEC1 offers AEC-Q100 qualification but trades off EMI performance and input-current telemetry for broader sync range and automotive validation.
Availability
LT8392EUFD#TRPBF is available at Aetrix Electronics and suitable for automotive voltage regulation, battery charging systems, industrial telecom rectifiers, and high-frequency portable power applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LT8392EUFD#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT8392EUFD#TRPBF belongs to Analog Devices' Power by Linear™ controller family, designed specifically for high-efficiency, wide-input-range DC/DC conversion in harsh environments where seamless buck-boost operation and robust fault handling are critical.
FAQ
What is the maximum input voltage supported by the LT8392EUFD#TRPBF?
The LT8392EUFD#TRPBF supports an absolute maximum input voltage of 60V on the VIN pin. Its operational input range is 3V to 60V, though operation below 4V requires EXTVCC ≥ 4.5V to maintain internal regulator stability. This makes the LT8392EUFD#TRPBF suitable for automotive applications experiencing load dump transients up to 60V.
Does the LT8392EUFD#TRPBF support both constant-voltage and constant-current regulation?
Yes, the LT8392EUFD#TRPBF supports dual-loop regulation: FB pin enables ±1.5% constant-voltage control, while ISP/ISN pins provide ±4% accurate input or output current regulation. The CTRL pin allows analog programming of the current limit threshold from 0mV to 50mV, making the LT8392EUFD#TRPBF ideal for battery charging and LED driver applications requiring precise CV/CC profiles.
How does the LT8392EUFD#TRPBF handle transitions between buck, buck-boost, and boost modes?
The LT8392EUFD#TRPBF uses a proprietary peak-buck/peak-boost current mode control scheme with hysteresis to ensure seamless, low-noise transitions between operating regions. Based on real-time VIN/VOUT ratio, it automatically selects among four states-peak-buck in buck, peak-buck in buck-boost, peak-boost in buck-boost, and peak-boost in boost-without output disturbance. This behavior is confirmed in the LT8392EUFD#TRPBF's typical performance curves (Figures G01–G03).
What thermal performance can be expected from the LT8392EUFD#TRPBF in its QFN package?
The LT8392EUFD#TRPBF in the 28-lead QFN (4mm × 5mm) package delivers θJC = 3.4°C/W and θJA = 43°C/W. With the exposed pad soldered to a 2-in² internal copper plane, it sustains 96W (12V/8A) operation at ambient temperatures up to 85°C. This thermal performance is validated in the LT8392EUFD#TRPBF's efficiency vs. temperature plots (Figures G08–G09) and enables high-density power designs without forced air cooling.
Can the LT8392EUFD#TRPBF be synchronized to an external clock source?
Yes, the LT8392EUFD#TRPBF supports external synchronization via the SYNC/SPRD pin. When driven with a TTL/CMOS clock signal between 150kHz and 650kHz, the internal oscillator locks to the external frequency with minimal jitter. This capability allows system-level EMI reduction by aligning switching edges across multiple converters-a feature explicitly documented in the LT8392EUFD#TRPBF's Electrical Characteristics table under "SYNC Frequency".
LT8392EUFD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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-QFN (4x5)
LT8392EUFD#TRPBF FAQ
1.How can I place an order for LT8392EUFD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8392EUFD#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 LT8392EUFD#TRPBF reliable?
The price and inventory of LT8392EUFD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8392EUFD#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8392EUFD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8392EUFD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8392EUFD#TRPBF?
LT8392EUFD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8392EUFD#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 LT8392EUFD#TRPBF?
For technical support, including LT8392EUFD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8392EUFD#TRPBF requirements.
6.How does Aetrix verify that LT8392EUFD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8392EUFD#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 LT8392EUFD#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8392EUFD#TRPBF?
All LT8392EUFD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8392EUFD#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 LT8392EUFD#TRPBF part is unused and in its original packaging.
Return procedure for LT8392EUFD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT8392EUFD#TRPBF Tags
-
UCC28C45DR
Texas Instruments
-
UCC28C40DR
Texas Instruments
-
UCC28C43DR
Texas Instruments
-
ZXSC410E6TA
Diodes Incorporated
-
LM3524DMX/NOPB
Texas Instruments
-
LM3489MMX/NOPB
Texas Instruments
-
MIC2102YML-TR
Microchip Technology
-
LM5148RGYR
Texas Instruments
-
TL598CDR
Texas Instruments
-
LM5155DSSR
Texas Instruments
-
LM25085MYX/NOPB
Texas Instruments
-
UCC2813DTR-0
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
