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Analog Devices Inc. LT8364IDE#PBF
- Part No.:
- LT8364IDE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LT8364IDE#PBF.pdf
- Description:
- IC REG BOOST SEPIC 4A 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,395
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Product details
Overview
LT8364IDE#PBF from Analog Devices is a current-mode DC/DC converter IC with a 60V, 4A integrated power switch, supporting boost, SEPIC, and inverting topologies from 2.8V to 60V input. It delivers up to 48V output at 1A (VIN=24V), achieves 9µA quiescent current in Burst Mode, maintains <15mV output ripple, and operates across –40°C to 125°C for industrial and automotive power conversion.
For engineers reviewing the LT8364IDE#PBF datasheet, LT8364IDE#PBF pinout, LT8364IDE#PBF application, or LT8364IDE#PBF equivalent, this page provides verified topology flexibility (single FBX pin for ±VOUT), programmable 300kHz–2MHz switching, SYNC/MODE-selectable low-EMI modes, BIAS-pin efficiency optimization, and thermal performance data specific to the 12-lead 4mm × 3mm DFN package.
Technical Context
The LT8364IDE#PBF implements fixed-frequency current-mode control with dual error amplifiers-one active for positive outputs (FBX = +1.60V reference) and the other for negative outputs (FBX = –0.80V reference)-enabling topology reconfiguration without hardware change. Its oscillator frequency is resistor-programmed via RT pin and supports synchronization or spread-spectrum modulation via SYNC/MODE pin.
Protection includes overcurrent limiting (7.5A peak), thermal shutdown (>170°C), UVLO with 80mV hysteresis on EN/UVLO, and frequency foldback during overload. The BIAS pin supplies INTVCC when 4.4V ≤ BIAS ≤ VIN, reducing VIN current draw and improving full-load efficiency in SEPIC or high-VIN boost designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8V to 60V - supports wide-range industrial rails, automotive battery transients, and telecom inputs without pre-regulation. |
| Switch Rating | 60V, 4A - enables 48V boost outputs from 12V/24V sources and robust operation under load dump conditions. |
| Quiescent Current | 9µA in Burst Mode - sustains >85% efficiency at 1mA load, critical for always-on battery-powered systems. |
| Switching Frequency | 300kHz to 2MHz - adjustable via RT resistor; higher frequencies allow smaller magnetics and faster transient response. |
| Output Voltage Polarity | Programmable positive or negative - single FBX pin eliminates external topology-switching circuitry. |
| Operating Temperature | –40°C to 125°C - qualified for under-hood automotive and industrial ambient environments. |
| Package | 12-lead 4mm × 3mm DFN with exposed PGND/GND pad - θJC = 5.5°C/W enables >3W continuous power dissipation with proper PCB copper. |
Pinout & Package
LT8364IDE#PBF uses a thermally enhanced 12-lead (4mm × 3mm) plastic DFN package with exposed pad (Pin 13) soldered to PCB for optimal thermal and ground performance. Pin count and layout match the DE variant designation in Analog Devices' ordering matrix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO | Enable and undervoltage lockout input | 1.6V rising threshold with 80mV hysteresis; <0.2V reduces VIN current to <1µA for ultra-low standby power. |
| VIN | Main input supply | Accepts 2.8V–60V; must be bypassed locally to exposed PGND near EN/UVLO pin for EMI suppression. |
| INTVCC | Internal 3.2V regulator output | Requires 1µF ceramic capacitor to GND; not externally loaded-powers gate drivers and internal logic. |
| BIAS | Secondary supply for INTVCC | Accepts 4.4V–40V; supplies INTVCC when active, reducing VIN current and improving efficiency in SEPIC/high-VIN boost. |
| VC | Error amplifier output | Connects to external compensation network (R-C-CE) to stabilize loop across input/output ranges. |
| FBX | Feedback input for ±VOUT regulation | +1.60V reference for boost/SEPIC; –0.80V reference for inverting; determines output voltage via resistor divider. |
| RT | Frequency programming | Resistor to GND sets fSW from 300kHz to 2MHz; formula: RT(kΩ) = 51.2/fOSC(MHz) – 5.6. |
| SS | Soft-start control | 2µA constant-current charge; capacitor value sets inductor current ramp rate and limits startup stress. |
| SYNC/MODE | Mode selection and clock sync | Five configurations: GND = Burst Mode; float = pulse-skip; >1.7V = pulse-skip+SSFM; external clock = sync+pulse-skip. |
| SW1/SW2 | Power switch output | 60V-rated internal MOSFET drain/source; minimize trace area to reduce EMI radiation. |
| PGND/GND | Power and signal ground | Exposed pad (Pin 13) is primary thermal path and low-impedance return for SW and input/output capacitors. |
Key Features
| Feature | Design Value |
|---|---|
| Single FBX pin topology selection | Eliminates external switches or jumpers-positive output uses +1.60V reference; negative output uses –0.80V reference. |
| Burst Mode with 9µA IQ | Maintains regulation at microamp loads while keeping output ripple <15mV-ideal for sensor nodes and backup power. |
| Spread Spectrum Frequency Modulation | ±20% frequency dither at fOSC/256 rate reduces peak EMI by >10dB without filter redesign. |
| BIAS pin efficiency boost | Redirects INTVCC current from VIN to BIAS supply (e.g., VOUT in SEPIC), cutting VIN current by >90% at full load. |
| Programmable UVLO with hysteresis | Resistive divider on EN/UVLO sets precise turn-on (1.68V) and turn-off (1.60V) thresholds for system-level brownout protection. |
Applications
| Automotive LED Headlamp Driver | Industrial 48V Telecom Power Supply |
|---|---|
Use Scenario: Driving high-brightness LEDs from 12V vehicle battery with dynamic dimming and cold-crank tolerance. IC Role / Device Role / Timing Role: Boost converter generating regulated 48V from 6V–16V input; FBX regulates LED current via sense resistor feedback. Use Value: 9µA Burst Mode IQ extends battery life during parking mode; 60V switch withstands 30V load-dump transients per ISO 7637-2. |
Use Scenario: Generating isolated 48V intermediate bus from 24V or 36V industrial DC rail for PoE++ or base station RF modules. IC Role / Device Role / Timing Role: High-efficiency boost controller with programmable 1MHz switching to minimize EMI in dense PCB layouts. Use Value: BIAS pin connected to VOUT reduces input current by 35% at 1A load; SSFM meets CISPR 32 Class B conducted emissions limits. |
| Portable Medical Imaging Sensor Bias | Ruggedized IoT Edge Node Power |
Use Scenario: Providing stable ±15V bias for CCD/CMOS image sensors in handheld ultrasound or X-ray detectors. IC Role / Device Role / Timing Role: Inverting configuration using FBX's –0.80V reference to generate negative output; soft-start prevents sensor latch-up. Use Value: Single FBX pin simplifies layout vs dual-controller solutions; –40°C to 125°C rating ensures operation inside sealed enclosures. |
Use Scenario: Powering LoRaWAN or NB-IoT modems and environmental sensors from primary LiSOCl₂ battery with 10-year shelf life. IC Role / Device Role / Timing Role: Ultra-low-IQ boost converter stepping 3.6V battery to 5V for MCU and radio; Burst Mode dominates 99.9% of duty cycle. Use Value: 9µA sleep current enables >10-year runtime; programmable UVLO disables converter below 2.8V to prevent battery deep discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC/DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3789EFE#PBF | 4-switch synchronous buck-boost controller; no integrated switch; requires external MOSFETs; supports 4V–36V input. | Used where >95% efficiency at >3A is required; lacks Burst Mode IQ <10µA; no inverting capability. | Select for high-current, high-efficiency buck-boost where board space allows discrete FETs and thermal management. |
| MAX20404ATPA/VY+ | 3.5A, 60V monolithic boost with 12µA IQ; single FB pin but only supports positive outputs; no SSFM or BIAS pin. | Suitable for cost-sensitive 12V→24V/48V boost; lacks topology flexibility and EMI-reduction features of LT8364IDE#PBF. | Select when only positive output is needed and spread-spectrum or dual-supply efficiency is not required. |
Compared with LTC3789EFE#PBF and MAX20404ATPA/VY+, the LT8364IDE#PBF uniquely combines integrated 4A/60V switching, ±VOUT capability via one FBX pin, 9µA Burst Mode, and BIAS-driven efficiency-making it optimal for space-constrained, multi-topology, ultra-low-power industrial and automotive converters.
Availability
LT8364IDE#PBF is available at Aetrix Electronics and suitable for automotive LED drivers, industrial 48V telecom supplies, portable medical imaging bias, ruggedized IoT edge node power, and aerospace avionics requiring stable component supply across extended temperature ranges.
Supply support for LT8364IDE#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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, industrial automation, and mission-critical systems.
The LT8364IDE#PBF belongs to Analog Devices' Power by Linear™ family of high-voltage DC/DC converters, designed specifically for demanding industrial, automotive, and medical applications requiring wide input range, ultra-low quiescent current, and topology flexibility.
FAQ
What topology configurations does the LT8364IDE#PBF support?
The LT8364IDE#PBF supports boost, SEPIC, and inverting converter topologies using a single FBX pin. For positive outputs (boost/SEPIC), FBX references +1.60V; for negative outputs (inverting), it references –0.80V. No external switching components or pin strapping are required-the IC automatically adapts its internal error amplifier based on FBX voltage polarity. This eliminates design complexity when multiple output polarities are needed across product variants.
How does the BIAS pin improve efficiency in the LT8364IDE#PBF?
The BIAS pin on the LT8364IDE#PBF supplies the internal 3.2V INTVCC regulator when 4.4V ≤ BIAS ≤ VIN, diverting up to 95% of INTVCC current away from the main VIN rail. In SEPIC applications where VOUT ≈ VIN, connecting BIAS to VOUT reduces total input current and improves full-load efficiency by 2–4 percentage points. This feature is especially valuable in thermally constrained designs where minimizing VIN dissipation is critical.
What is the minimum output current at which LT8364IDE#PBF maintains regulation in Burst Mode?
The LT8364IDE#PBF maintains regulation down to 100µA output current in Burst Mode, consuming only 9µA quiescent current from VIN. Output ripple remains below 15mV at this load due to controlled burst pulse amplitude and timing. Below 100µA, regulation is maintained until the output capacitor's leakage current dominates-so selecting low-leakage output capacitors (e.g., polymer or high-quality ceramic) is essential for sub-mA operation.
Can the LT8364IDE#PBF synchronize to an external clock, and what are the voltage requirements?
Yes, the LT8364IDE#PBF can synchronize to an external clock applied to the SYNC/MODE pin. The input must be a square wave with 20–80% duty cycle, valley <0.4V, and peak >1.7V (up to 6V). Synchronization is supported from 300kHz to 2MHz. When synchronized, the LT8364IDE#PBF operates in pulse-skip mode-not Burst Mode-to maintain alignment with the external clock, ensuring deterministic timing in noise-sensitive systems.
What thermal derating guidance applies to the LT8364IDE#PBF in its 12-lead DFN package?
The LT8364IDE#PBF in the 12-lead 4mm × 3mm DFN has θJC = 5.5°C/W and θJA = 43°C/W with standard JEDEC 2-layer board layout. At 125°C maximum junction temperature and 25°C ambient, continuous output power is limited to ~3.2W without forced airflow. To sustain higher power, the exposed pad (Pin 13) must be soldered to ≥4cm² of 2oz copper with ≥4 thermal vias-this reduces θJA to ~30°C/W and enables >4.5W dissipation in still air.
LT8364IDE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost, SEPIC
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.8V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- 60V (Switch)
- Current - Output:
- 4A (Switch)
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DFN (4x3)
LT8364IDE#PBF FAQ
1.How can I place an order for LT8364IDE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8364IDE#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 LT8364IDE#PBF reliable?
The price and inventory of LT8364IDE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8364IDE#PBF is usually 5 days.
3.What payment methods are accepted for LT8364IDE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8364IDE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8364IDE#PBF?
LT8364IDE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8364IDE#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 LT8364IDE#PBF?
For technical support, including LT8364IDE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8364IDE#PBF requirements.
6.How does Aetrix verify that LT8364IDE#PBF is sourced from the original manufacturer or authorized distributors?
All LT8364IDE#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 LT8364IDE#PBF meets industry standards.
7.What is the process for return or replacement of LT8364IDE#PBF?
All LT8364IDE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8364IDE#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 LT8364IDE#PBF part is unused and in its original packaging.
Return procedure for LT8364IDE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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