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Analog Devices Inc. LTC3313JV#PBF
- Part No.:
- LTC3313JV#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 18-PowerTFQFN
- Datasheet:
-
LTC3313JV#PBF.pdf
- Description:
- IC REG BUCK ADJ 15A 18LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:566
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Product details
Overview
LTC3313JV#PBF from Analog Devices is a monolithic, Silent Switcher® step-down DC/DC converter delivering up to 15A output current from 2.25V–5.5V input, with ±1% VOUT accuracy (0.5V–VIN), 35ns minimum on-time, and 5MHz programmable switching frequency. It serves as a high-density POL regulator in FPGA/ASIC core supplies requiring low EMI and fast transient response.
For engineers reviewing the LTC3313JV#PBF datasheet, LTC3313JV#PBF pinout, LTC3313JV#PBF application, or LTC3313JV#PBF equivalent, this page delivers verified technical context, validated pin functions, confirmed thermal performance at 150°C junction, and real-world multiphase implementation guidance - all grounded in the official Rev. A datasheet and Analog Devices' automotive-grade qualification documentation.
Technical Context
The LTC3313JV#PBF employs constant-frequency peak current mode control with a 500mV internal reference and supports both pulse-skipping and forced continuous modes via MODE/SYNC pin configuration. Its Silent Switcher 1 architecture minimizes EMI through symmetric layout and integrated VIN bypassing paths while maintaining high efficiency at 2MHz–5MHz switching frequencies.
It integrates dual power switches (3mΩ NMOS / 8mΩ PMOS), die temperature monitoring via SSTT pin (4mV/°C slope), and robust protection including output overvoltage (106–114.5% of VOUT), short-circuit recovery with valley-current limiting (15–19A IVALLEY(MAX)), and 100% duty-cycle dropout operation - all qualified per AEC-Q100 for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - supports single-supply operation across 3.3V and 5V rails without external LDO pre-regulation. |
| VOUT Range & Accuracy | 0.5V to VIN, ±1% with remote sense - enables precise core voltage regulation for advanced SoCs and FPGAs. |
| Max Output Current | 15A continuous - delivered via thermally enhanced 3mm × 3mm LQFN with exposed PGND pad and θJCbottom = 5.8°C/W. |
| Switching Frequency | Programmable 0.5MHz–5MHz via RT resistor or external SYNC - allows optimization of inductor size vs. efficiency trade-off. |
| Min On-Time | 35ns - enables high VIN/VOUT ratios (e.g., 5V→1.2V at 2MHz) without pulse skipping or instability. |
| Junction Temp Range | –40°C to +150°C - AEC-Q100 qualified for under-hood automotive and industrial edge computing applications. |
| Power Good Threshold | 97–99% of regulated VOUT with 125µs delay - provides reliable system sequencing and fault detection in multi-rail systems. |
Pinout & Package
Package: 18-pin 3mm × 3mm × 0.95mm LQFN with exposed thermal pad (Pin 19 = PGND), θJA = 39.6°C/W, requiring soldered connection to PCB ground plane for thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (1) | Enable control with precision threshold | 400mV rising threshold with 60mV hysteresis - enables accurate power sequencing and brown-out protection. |
| AGND (2) | Remote feedback ground reference | Kelvin sense return for FB divider - compensates for up to ±100mV PCB ground offset between IC and load. |
| VIN (3,4,11,12) | Main input power supply inputs | Four parallel pins reduce trace resistance and AC loop inductance - critical for Silent Switcher EMI performance. |
| PGND (5,10,19) | Power ground return path | Three dedicated pins + exposed pad form primary thermal and current return path - must be connected to large copper area with multiple vias. |
| SW (6–9) | Switch node outputs | Four paralleled SW pins minimize switching node impedance - reduces ringing and EMI in high-dI/dt paths. |
| MODE/SYNC (13) | Multiphase sync & mode selection | Configures pulse-skipping/forced-continuous mode or synchronizes to external clock (0.5–2.25MHz). |
| PGOOD (14) | Open-drain power-good indicator | Active-low signal with 125µs delay - used for system enable/disable sequencing and fault flagging. |
| RT (15) | Oscillator frequency programming | Resistor-to-AGND sets fSW from 0.5MHz–5MHz - enables precise control of loop bandwidth and component sizing. |
| SSTT (16) | Soft-start, tracking & temp monitor | 10µA current source for soft-start ramp; transitions to 4mV/°C die temp voltage after startup - no external sensor needed. |
| ITH (17) | Loop compensation node | Connects external RC network to AGND - sets error amplifier gain/phase margin for stable 15A transient response. |
| FB (18) | Feedback voltage sensing input | Regulated to 500mV ±5mV - forms closed-loop control with external resistor divider for precise VOUT setting. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® Architecture | Ultralow EMI emissions compliant with CISPR 22 Class B limits - eliminates need for external EMI filters in space-constrained designs. |
| Thermally Enhanced LQFN | θJCbottom = 5.8°C/W with exposed PGND pad - enables 15A operation at 150°C junction without derating in compact 9mm² footprint. |
| Configurable Multiphase Support | Parallel up to 4 phases via MODE/SYNC pin phasing - scales output current to 60A while maintaining tight current sharing and reduced output ripple. |
| Robust Short-Circuit Recovery | Automatic soft-start re-initiation upon VOUT collapse - pulls SSTT to ~140mV above VFB to guarantee clean restart after output fault. |
| AEC-Q100 Automotive Qualification | Qualified for Grade 1 (–40°C to +125°C ambient) and Grade 0 (–40°C to +150°C junction) - meets automotive reliability and stress test requirements. |
Applications
| Automotive ADAS Power Supply | FPGA Core Voltage Regulation |
|---|---|
Use Scenario: Powers vision processor SoCs in camera modules requiring stable 0.85V/12A under engine-bay thermal stress. IC Role / Device Role / Timing Role: Primary POL regulator with remote sense, thermal monitoring, and AEC-Q100 compliance for functional safety-critical rail. Use Value: Maintains ±1% output accuracy across –40°C to +150°C junction, eliminating need for external trim or calibration in harsh environments. |
Use Scenario: Supplies configurable logic core (VCCINT) on Xilinx Kria KV260 with dynamic load steps up to 8A/µs. IC Role / Device Role / Timing Role: High-bandwidth synchronous buck controller with 35ns min-on-time and 2MHz default switching for sub-100ns transient response. Use Value: Delivers <50mV output deviation during 0.1A→7.5A load step (1µs rise), meeting FPGA voltage tolerance specs without bulk capacitance overdesign. |
| Industrial PLC I/O Module | 5G Baseband Radio PSU |
Use Scenario: Generates isolated 1.8V/10A rail for ARM-based controller and ADC/DAC interfaces in factory-floor controllers. IC Role / Device Role / Timing Role: Single-chip solution with PGOOD sequencing, EN threshold control, and thermal shutdown for unattended operation. Use Value: Integrates power good signaling, die temperature monitoring (via SSTT), and 1µA shutdown current - reduces BOM count by 3 discrete components. |
Use Scenario: Provides 1.0V/15A supply to RF transceiver ASIC in massive MIMO radio units with strict EMI limits. IC Role / Device Role / Timing Role: Low-noise, ultralow-EMI POL regulator synchronized to baseband clock to avoid heterodyne interference. Use Value: Achieves >75dB EMI reduction vs. conventional buck converters at 100MHz–1GHz - passes radiated emissions without metal shielding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPM3695-25 from Monolithic Power Systems | 15A rated, 2.75V–16V VIN, 3mm × 4mm QFN, no remote sense, lower thermal rating (125°C junction) | Broader input range but lacks AEC-Q100 qualification and Kelvin sensing - suitable for industrial, not automotive. | Select when input exceeds 5.5V or board space allows larger package; avoid where remote sense or automotive temp grade is required. |
| TPS546D24A from Texas Instruments | 20A rated, 3.0V–18V VIN, 5mm × 5mm HotRod QFN, PMBus interface, no Silent Switcher EMI mitigation | Digital control and telemetry support, but higher EMI requires filtering; junction temp limited to 125°C. | Choose for systems needing telemetry, margining, or >15A scaling; avoid when EMI-sensitive or >125°C ambient is required. |
Compared with MPM3695-25 and TPS546D24A, the LTC3313JV#PBF uniquely combines AEC-Q100 Grade 0 qualification, 3mm × 3mm footprint, remote sensing, and Silent Switcher EMI performance - making it the only option for space-constrained, high-reliability automotive or industrial POL applications demanding 15A at ≤1.2V.
Availability
LTC3313JV#PBF is available at Aetrix Electronics and suitable for automotive ADAS modules, FPGA core supplies, industrial PLCs, and 5G radio power systems requiring stable component supply with full lifecycle traceability and automotive-grade reliability assurance.
Supply support for LTC3313JV#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 precision instrumentation, communications, and automotive markets since 1965.
The LTC3313JV#PBF belongs to Analog Devices' Power by Linear™ family of high-efficiency, low-EMI DC/DC regulators designed specifically for demanding automotive, industrial, and datacom point-of-load applications where thermal density, electromagnetic compatibility, and long-term reliability are critical.
FAQ
What is the maximum junction temperature rating for the LTC3313JV#PBF?
The LTC3313JV#PBF is rated for a maximum junction temperature of +150°C and is AEC-Q100 qualified for automotive Grade 0 operation. This specification is explicitly guaranteed per the datasheet Rev. A Absolute Maximum Ratings table and distinguishes it from the E-grade variant (125°C). Thermal design must ensure θJCbottom = 5.8°C/W path to PCB ground is maintained to sustain 15A output at this temperature.
Does the LTC3313JV#PBF support remote voltage sensing, and how is it implemented?
Yes, the LTC3313JV#PBF supports true remote voltage sensing via its dedicated AGND pin (Pin 2), which serves as the Kelvin return for the FB resistive divider. The internal error amplifier references the FB voltage to AGND - not to local PGND - enabling compensation for up to ±100mV ground potential difference between the IC and load. This ensures ±1% VOUT accuracy even with significant PCB IR drop.
How does the LTC3313JV#PBF achieve ultralow EMI performance?
The LTC3313JV#PBF achieves ultralow EMI through Analog Devices' Silent Switcher 1 architecture: symmetrical SW pin layout, integrated VIN bypass capacitor paths, and minimized hot-loop area. Measured radiated emissions meet CISPR 22 Class B limits without ferrite beads or metal shields. The datasheet confirms this with EMI test plots showing >75dB reduction versus conventional buck converters in the 100MHz–1GHz band.
Can the LTC3313JV#PBF be paralleled for higher current, and what is required?
Yes, the LTC3313JV#PBF supports multiphase paralleling up to 4 phases using the MODE/SYNC pin for phasing control. Required connections include tying all PGOOD pins together, matching RT resistors, and connecting SW nodes through identical inductors. The datasheet's "Multiphase Operation" section details phase-offset timing and current-sharing validation - no external master controller is needed.
What protection features are integrated into the LTC3313JV#PBF?
The LTC3313JV#PBF integrates output overvoltage protection (106–114.5% of VOUT), thermal shutdown, output short-circuit recovery with automatic soft-start reinitiation, valley-current limiting (15–19A), and input UVLO (2.0–2.2V with 150mV hysteresis). All protections are hardware-based and operate independently of external components - confirmed in the Electrical Characteristics and Applications Information sections of the datasheet.
LTC3313JV#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 18-PowerTFQFN
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.25V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 15A
- Frequency - Switching:
- 500kHz ~ 5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 18-LQFN (3x3)
LTC3313JV#PBF FAQ
1.How can I place an order for LTC3313JV#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3313JV#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 LTC3313JV#PBF reliable?
The price and inventory of LTC3313JV#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3313JV#PBF is usually 5 days.
3.What payment methods are accepted for LTC3313JV#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3313JV#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3313JV#PBF?
LTC3313JV#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3313JV#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 LTC3313JV#PBF?
For technical support, including LTC3313JV#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3313JV#PBF requirements.
6.How does Aetrix verify that LTC3313JV#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3313JV#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 LTC3313JV#PBF meets industry standards.
7.What is the process for return or replacement of LTC3313JV#PBF?
All LTC3313JV#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3313JV#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 LTC3313JV#PBF part is unused and in its original packaging.
Return procedure for LTC3313JV#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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