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Analog Devices Inc. LT8364IDE#TRPBF
- Part No.:
- LT8364IDE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LT8364IDE#TRPBF.pdf
- Description:
- IC REG BOOST SEPIC 4A 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,632
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Product details
Overview
LT8364IDE#TRPBF from Analog Devices is a 60V, 4A current-mode DC/DC converter IC supporting boost, SEPIC, and inverting topologies from 2.8V to 60V input. It delivers up to 48V output at 1A (VIN=24V), operates with 9µA quiescent current in Burst Mode, maintains <15mV output ripple, and targets automotive power supplies, telecom bias rails, and portable medical diagnostics.
For engineers reviewing the LT8364IDE#TRPBF datasheet, LT8364IDE#TRPBF pinout, LT8364IDE#TRPBF application, or LT8364IDE#TRPBF equivalent, key selection criteria include its single FBX-pin dual-polarity feedback architecture, programmable 300kHz–2MHz switching frequency, SYNC/MODE pin for EMI-optimized spread-spectrum or burst/pulse-skip mode selection, BIAS pin for efficiency enhancement, and AEC-Q100 qualification for automotive use.
Technical Context
The LT8364IDE#TRPBF implements fixed-frequency current-mode control with dual error amplifiers-one active for positive outputs (FBX = +1.6V reference), the other for negative outputs (FBX = –0.8V reference)-enabling topology reconfiguration without hardware change. Its oscillator supports RT-resistor programming and external synchronization across 300kHz–2MHz.
Protection includes thermal shutdown (>170°C), overcurrent limiting (7.5A peak), UVLO on EN/UVLO (1.6V turn-off, 1.68V turn-on with 80mV hysteresis), and INTVCC undervoltage lockout (2.5V fall, 2.65V rise). The BIAS pin dynamically sources INTVCC when 4.4V ≤ BIAS ≤ VIN, reducing VIN supply current and improving full-load efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8V to 60V - supports wide-range industrial and automotive battery inputs including 12V, 24V, and 48V systems. |
| Switch Rating | 60V, 4A - enables high-voltage boost conversion (e.g., 12V→48V) and robust SEPIC/inverting operation with margin. |
| Quiescent Current | 9µA in Burst Mode - sustains ultra-low-power standby in battery-powered equipment without compromising regulation. |
| Feedback Reference | +1.60V / –0.80V - single FBX pin supports both positive and negative output configurations without external logic. |
| Switching Frequency | 300kHz to 2MHz (RT-programmable) - allows optimization of size (higher fSW → smaller L/C) vs. efficiency (lower fSW → lower switching loss). |
| Output Ripple | <15mV typical - meets low-noise requirements for sensitive analog circuitry and medical imaging subsystems. |
| Package Thermal Resistance | θJA = 43°C/W (DFN) - enables 3W+ continuous power dissipation with minimal PCB copper area in compact layouts. |
Pinout & Package
LT8364IDE#TRPBF is housed in a thermally enhanced 12-lead 4mm × 3mm plastic DFN package with exposed PGND/GND pad (Pin 13) requiring soldering to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO | Enable / Undervoltage Lockout Input | Logic-controlled startup and system-level brownout protection; 1.6V threshold with 80mV hysteresis enables precise input voltage monitoring. |
| VIN | Main Input Supply | Primary power path for internal circuitry and switch driver; must be locally bypassed near pin and exposed pad. |
| INTVCC | Internal 3.2V Regulator Output | Fixed 3.2V supply for gate drivers and logic; requires 1µF ceramic bypass to GND; not user-loadable. |
| BIAS | Secondary Input for INTVCC | Accepts 4.4V–VIN to offload INTVCC current from VIN, improving efficiency-especially in SEPIC where VOUT may exceed VIN. |
| VC | Error Amplifier Output | Connects to external compensation network (R-C) to stabilize loop response across wide VIN/VOUT ranges. |
| FBX | Feedback Input | Single pin accepting either +1.6V or –0.8V reference for polarity-agnostic output regulation; determines topology behavior. |
| RT | Frequency Programming | Resistor-to-GND sets switching frequency from 300kHz to 2MHz; enables EMI tuning and component size optimization. |
| SS | Soft-Start Control | Capacitor-to-GND controls inductor current ramp rate during startup; 2µA charge current enables predictable, overshoot-free turn-on. |
| SYNC/MODE | Mode Selection & Clock Sync | Five-state pin: GND = Burst Mode; float = pulse-skip; >1.7V = pulse-skip + SSFM; 100k-to-GND = Burst + SSFM; external clock = sync + pulse-skip. |
| SW1/SW2 | Power Switch Output | Drives external inductor/diode network; low RDS(ON) (100mΩ typ.) minimizes conduction loss at 4A peak. |
| PGND/GND | Power & Signal Ground | Exposed pad (Pin 13) serves as primary thermal path and low-impedance return for switch current and signal references. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode Operation | 9µA IQ with <15mV ripple enables multi-year battery life in always-on IoT sensors and telematics modules. |
| Single FBX Dual-Polarity Feedback | Eliminates need for external level-shifting or topology-specific feedback networks-reduces BOM count and layout complexity. |
| Spread Spectrum Frequency Modulation | ±14–28% frequency deviation reduces peak EMI by >10dB, easing compliance with CISPR 25 Class 5 in automotive ECUs. |
| Programmable UVLO via EN/UVLO | Resistive divider sets precise turn-on/off thresholds (e.g., 9V–16V for 12V lead-acid systems), preventing erratic operation during cranking. |
| Thermally Enhanced DFN | 4mm × 3mm footprint with θJC = 5.5°C/W supports >3W dissipation without heatsink-ideal for space-constrained ADAS camera modules. |
Applications
| Automotive Infotainment Power | Portable Ultrasound Bias Supply |
|---|---|
|
Use Scenario: Generating stable ±15V rails from 12V vehicle battery for audio DACs, ADCs, and op-amps in head units. IC Role / Device Role / Timing Role: Inverting configuration provides clean negative rail; Burst Mode maintains low IQ during display-off states. Use Value: Eliminates need for separate inverting charge pump or dual-output controller-reducing solution size by 40% and bill-of-materials cost. |
Use Scenario: Providing 48V bias for piezoelectric transducer drivers in handheld ultrasound probes. IC Role / Device Role / Timing Role: Boost converter delivering 48V @ 640mA from 12V input; SSFM minimizes EMI coupling into sensitive analog front-end. Use Value: Achieves >90% efficiency at full load while meeting IEC 60601-1 leakage and EMC requirements without added filtering. |
| Industrial Sensor Node Supply | Telecom Remote PHY Power |
|
Use Scenario: Converting 24V PoE-derived input to isolated 5V/3.3V rails for wireless sensor nodes in factory automation. IC Role / Device Role / Timing Role: SEPIC topology accommodates input voltage sag below output; programmable soft-start prevents inrush tripping upstream PSE. Use Value: Single-chip solution withstands 24V±20% input variation and delivers regulated output during brownouts-improving node uptime. |
Use Scenario: Generating 12V/1A auxiliary supply from 48V phantom power in remote PHY units for cable access networks. IC Role / Device Role / Timing Role: High-efficiency boost converter operating at 1MHz to minimize magnetics size; BIAS pin connected to VOUT improves light-load efficiency. Use Value: Reduces thermal footprint by 35% vs. legacy controllers, enabling fanless operation in sealed outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8362IDE#TRPBF | 2.8V–60V input, 2.5A switch, same package and pinout; lacks BIAS pin and SSFM capability. | Suitable for lower-current (<1.5A) boost/SEPIC designs where EMI is less critical and efficiency at light loads is secondary. | Select when cost sensitivity outweighs need for 4A capability, spread spectrum, or BIAS-driven efficiency gains. |
| LM5122MMX/NOPB | 3V–65V input, 3A switch, external MOSFET driver; no integrated switch; requires more external components. | Better suited for >50W designs needing discrete FET optimization or higher voltage tolerance beyond 60V. | Choose when design requires >4A peak current, custom FET selection, or operation above 60V input-accepting larger solution size and layout effort. |
Compared with LT8364IDE#TRPBF, LT8362IDE#TRPBF offers identical topology flexibility and footprint but trades 4A capability and advanced features (SSFM, BIAS) for lower cost, while LM5122MMX/NOPB shifts complexity to external FETs for higher power scalability at the expense of integration and board area.
Availability
LT8364IDE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment systems, portable medical diagnostics, industrial sensor nodes, and telecom remote PHY units requiring stable component supply across extended temperature and lifecycle demands.
Supply support for LT8364IDE#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, and automotive markets.
The LT8364IDE#TRPBF belongs to Analog Devices' Power by Linear™ family of monolithic DC/DC converters designed specifically for high-reliability, wide-input-voltage applications in harsh environments-including AEC-Q100 Grade I automotive and medical-grade portable equipment.
FAQ
What is the maximum output voltage achievable with LT8364IDE#TRPBF in boost configuration?
The LT8364IDE#TRPBF supports output voltages up to 60V in boost mode, limited by its 60V-rated internal switch and absolute maximum SW pin rating. Practical output is constrained by external component ratings-e.g., diode reverse voltage and capacitor WV-and stability margins. For reliable 48V operation (as shown in the typical application), standard 60V Schottky diodes and 63V output capacitors are recommended. The LT8364IDE#TRPBF itself imposes no additional voltage ceiling beyond its 60V switch rating.
How does the BIAS pin improve efficiency in LT8364IDE#TRPBF designs?
The BIAS pin on the LT8364IDE#TRPBF allows an auxiliary supply (4.4V ≤ BIAS ≤ VIN) to power the internal 3.2V INTVCC regulator, diverting that current away from the main VIN rail. This reduces VIN supply current by up to 1.6mA under full load-directly improving overall converter efficiency, especially in SEPIC topologies where VOUT may exceed VIN. The LT8364IDE#TRPBF automatically selects between VIN and BIAS based on voltage levels; unused BIAS pins must be tied to GND.
Can LT8364IDE#TRPBF operate in discontinuous conduction mode (DCM)?
Yes, the LT8364IDE#TRPBF supports both continuous (CCM) and discontinuous conduction mode (DCM) operation. Its minimum on-time (85ns typ.) and minimum off-time (50ns typ.) define duty cycle limits, and DCM naturally occurs at light loads or with high-inductance values. DCM eliminates right-half-plane zero concerns and relaxes inductor selection, though it increases peak inductor current. The LT8364IDE#TRPBF's current-mode control ensures stable regulation across both modes without external compensation changes.
What is the purpose of the SYNC/MODE pin's five operational states in LT8364IDE#TRPBF?
The SYNC/MODE pin on the LT8364IDE#TRPBF selects among five distinct operating modes: (1) GND/<0.14V → Burst Mode for lowest IQ; (2) external clock → synchronized pulse-skip; (3) 100k-to-GND → Burst + SSFM; (4) floating → unsynchronized pulse-skip; (5) >1.7V → pulse-skip + SSFM. This enables dynamic trade-offs between light-load efficiency, EMI performance, and timing predictability-critical for automotive and medical applications where both low standby power and low radiated emissions are mandatory.
Is LT8364IDE#TRPBF qualified for automotive applications?
Yes, the LT8364IDE#TRPBF is AEC-Q100 qualified for automotive applications (Grade I: –40°C to +125°C junction temperature). Its DFN package, robust UVLO hysteresis, integrated thermal shutdown, and SSFM capability meet stringent automotive reliability and EMC requirements. It is widely deployed in infotainment systems, ADAS camera modules, and body control units where wide input range and long-term supply stability are essential. The "I" grade designation in LT8364IDE#TRPBF confirms this qualification.
LT8364IDE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LT8364IDE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8364IDE#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 LT8364IDE#TRPBF reliable?
The price and inventory of LT8364IDE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8364IDE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8364IDE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8364IDE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8364IDE#TRPBF?
LT8364IDE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8364IDE#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 LT8364IDE#TRPBF?
For technical support, including LT8364IDE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8364IDE#TRPBF requirements.
6.How does Aetrix verify that LT8364IDE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8364IDE#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 LT8364IDE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8364IDE#TRPBF?
All LT8364IDE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8364IDE#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 LT8364IDE#TRPBF part is unused and in its original packaging.
Return procedure for LT8364IDE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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