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Analog Devices Inc. LTC3315AJV#TRPBF
- Part No.:
- LTC3315AJV#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-VFQFN Exposed Pad
- Datasheet:
-
LTC3315AJV#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 2A/2A DL 12LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,076
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Product details
Overview
LTC3315AJV#TRPBF from Analog Devices is a dual-channel monolithic synchronous step-down DC/DC converter IC delivering 2A per channel from a 2.25V–5.5V input, operating at 2MHz fixed frequency with 25ns minimum on-time and ±1% output voltage accuracy. It integrates two independent buck regulators in a thermally enhanced 2mm × 2mm LQFN package, designed for space-constrained FPGA core supplies and automotive infotainment power rails.
For engineers reviewing the LTC3315AJV#TRPBF datasheet, LTC3315AJV#TRPBF pinout, LTC3315AJV#TRPBF application, or LTC3315AJV#TRPBF equivalent, key selection criteria include its AEC-Q100 qualification (–40°C to 150°C junction), dual-phase 180° interleaved operation, Burst Mode® efficiency at light loads, and internal soft-start with PGOOD monitoring for reliable system power sequencing.
Technical Context
The LTC3315AJV#TRPBF implements peak current mode control with dual independent feedback loops (FB1/FB2) regulating outputs down to 0.5V via 500mV reference. Its 180° phase-shifted switching reduces input ripple and enables interleaved current sharing across both channels.
It supports three operating modes-forced continuous, pulse-skipping, and Burst Mode®-selected via the MODE/SYNC pin, with automatic adaptation of slope compensation during external synchronization (1MHz–3MHz). Thermal shutdown triggers at 165°C with 5°C hysteresis, and overvoltage protection activates at 107–114% of VOUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - supports single-cell Li-ion, USB PD, and 3.3V/5V intermediate bus architectures. |
| Output Current | 2A per channel - sufficient for powering dual-core processors or split-rail FPGA I/O banks. |
| Switching Frequency | 2MHz (typical), synchronizable 1–3MHz - enables use of sub-1µH inductors and compact ceramic output capacitors. |
| Feedback Accuracy | ±1% over temperature - ensures stable core voltage regulation under thermal stress in automotive environments. |
| Min On-Time | 25ns - allows high step-down ratios (e.g., 5.5V→0.8V at 2MHz) without pulse skipping. |
| Junction Temp Range | –40°C to 150°C - qualified per AEC-Q100 Grade 1, suitable for under-hood automotive modules. |
| Shutdown Current | 1.2µA - minimizes battery drain in always-on vehicle subsystems. |
Pinout & Package
Package: 12-lead 2mm × 2mm × 0.74mm LQFN with exposed thermal pad (Pin 13 = GND). Pin pitch: 0.5mm. MSL Level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1, EN2 | Independent enable inputs | 400mV precision threshold enables controlled power-up sequencing between rails (e.g., VDDIO before VCCINT). |
| FB1, FB2 | Feedback inputs | Regulate outputs to 500mV reference; support resistor-divider programming from 0.5V to VIN. |
| SW1, SW2 | Switch nodes | High-current paths for external inductors; require short, wide PCB traces to minimize EMI and conduction loss. |
| VIN (Pins 7,10) | Input supply | Dual VIN pins reduce IR drop and improve thermal distribution; each requires local 10µF low-ESR ceramic bypass. |
| PGOOD | Open-drain status flag | Asserts high only when both enabled outputs are within 97–99% of target; used for system reset or fault logging. |
| MODE/SYNC | Mode control & sync input | Selects Burst Mode® (VIN), pulse-skip (GND), or forced continuous (floating); accepts 1–3MHz external clock for EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 2A synchronous bucks | Integrates two complete 2A regulators in one die-reduces BOM count vs. discrete solutions and eliminates layout mismatch between channels. |
| 180° interleaved switching | Cuts input RMS current by ~30%, lowering input capacitor stress and enabling smaller bulk capacitance in POL applications. |
| Burst Mode® operation | Achieves >85% efficiency at 1mA load while maintaining <20mVpp output ripple-ideal for standby power domains. |
| Internal soft-start & compensation | Eliminates need for external SS capacitors or loop compensation components-reduces design cycle time and board area. |
| Overvoltage & short-circuit protection | Hardware-level safeguards prevent damage during transient faults-no firmware intervention required for safety-critical automotive use. |
Applications
| FPGA Core Supply | Automotive Infotainment |
|---|---|
Use Scenario: Powering dual-voltage FPGA domains (e.g., 1.2V core + 1.8V I/O) from a single 3.3V rail in ADAS camera modules. IC Role / Device Role / Timing Role: Dual-channel buck regulator providing tightly regulated, sequenced, and monitored power rails with PGOOD signaling to FPGA configuration logic. Use Value: Eliminates need for two separate converters, reducing solution size by 40% and improving cross-regulator transient response via interleaving. | Use Scenario: Supplying head unit SoC cores and display interface circuitry in vehicles operating across –40°C to +105°C ambient. IC Role / Device Role / Timing Role: AEC-Q100 qualified dual buck delivering robust 2A/2A power with thermal shutdown and overvoltage protection for functional safety compliance. Use Value: Guaranteed operation up to 150°C junction temperature enables placement near heat sources without derating, simplifying thermal management. |
| Optical Networking Line Card | Industrial PLC CPU Module |
Use Scenario: Generating 0.85V and 1.2V rails for DSP and SerDes in compact optical transceivers with strict EMI limits. IC Role / Device Role / Timing Role: Synchronized dual buck operating at 2.5MHz to shift switching noise out of sensitive 1–10GHz RF bands. Use Value: External clock synchronization enables deterministic EMI placement, avoiding interference with high-speed data lanes. | Use Scenario: Powering real-time controller CPUs and isolated I/O interfaces in factory automation systems requiring long-term reliability. IC Role / Device Role / Timing Role: Dual-output POL regulator with 1.2µA shutdown current and 100% duty cycle capability for low-dropout operation during brownout conditions. Use Value: Maintains regulation during 2.25V input dips common in industrial 24V DC systems with long cable runs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS652171RSLR | Single 3A + dual 1.5A outputs; integrated LDOs; I²C programmable; 2.7–5.5V input. | Targeted at ARM-based tablets; lacks AEC-Q100 rating and 150°C operation. | Choose for designs needing digital configurability and mixed analog/digital power, not automotive-grade thermal performance. |
| MAX20075ATPA/VY+ | Dual 3A/3A; 3.5–36V input; spread-spectrum; AEC-Q100 Grade 0 (–40°C to +150°C). | Higher input range suits 12V/24V automotive systems; larger 4mm × 4mm TQFN package. | Prefer when input exceeds 5.5V or when spread-spectrum EMI reduction is mandatory over footprint constraints. |
Compared with TPS652171RSLR and MAX20075ATPA/VY+, the LTC3315AJV#TRPBF delivers optimal balance of ultra-small footprint (2mm²), precise dual 2A capability, and automotive-grade thermal resilience-making it ideal for space-limited, high-reliability 5V-input POL applications where minimal board area and guaranteed 150°C operation are critical.
Availability
LTC3315AJV#TRPBF is available at Aetrix Electronics and suitable for FPGA core supplies, automotive infotainment systems, and optical networking line cards requiring stable component supply with full AEC-Q100 traceability and extended temperature assurance.
Supply support for LTC3315AJV#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 industrial, automotive, communications, and healthcare markets.
The LTC3315A product line delivers highly integrated, thermally robust dual buck regulators targeting space-constrained power delivery in automotive ADAS, telecom infrastructure, and high-density computing applications.
FAQ
What is the maximum junction temperature specification for the LTC3315AJV#TRPBF?
The LTC3315AJV#TRPBF is rated for operation up to 150°C junction temperature and is AEC-Q100 qualified for automotive Grade 1 (–40°C to +150°C). Overtemperature shutdown activates at 165°C with 5°C hysteresis, ensuring safe thermal margin. This specification is confirmed in the Absolute Maximum Ratings table and Operating Junction Temperature section of the official Analog Devices datasheet Rev. B.
Does the LTC3315AJV#TRPBF support external clock synchronization, and what is the valid frequency range?
Yes, the LTC3315AJV#TRPBF supports external clock synchronization via the MODE/SYNC pin across 1MHz to 3MHz. When an external clock is applied, both buck regulators operate in forced continuous mode with Buck 1 aligned to the rising edge and Buck 2 phase-shifted by 180°. The internal PLL locks within microseconds, and removal of the clock is detected in ~10µs-details are specified in the Oscillator and MODE/SYNC electrical characteristics table.
What are the key differences between the LTC3315AJV#TRPBF and the WLCSP variant LTC3315AACBZ-R7?
The LTC3315AJV#TRPBF uses a 12-lead 2mm × 2mm LQFN package rated for –40°C to +150°C junction, while the LTC3315AACBZ-R7 uses a 16-ball 1.64mm × 1.64mm WLCSP rated for –40°C to +125°C. The LQFN version features lower θJA (51°C/W vs. 58°C/W) and higher thermal mass, making it preferred for sustained 2A loads in high-ambient environments-critical for automotive under-hood deployment of the LTC3315AJV#TRPBF.
How does the PGOOD function behave when only one buck regulator is enabled on the LTC3315AJV#TRPBF?
When only one buck regulator is enabled on the LTC3315AJV#TRPBF, the PGOOD pin remains low until that enabled regulator's output reaches 97–99% of its target voltage and stays within overvoltage limits (107–114%). If the second buck is disabled, PGOOD does not monitor it. This behavior is defined in the Power Good/Soft-Start specifications and verified in the Typical Performance Characteristics (Figure G16), ensuring accurate system power-good assertion even in asymmetric enable configurations.
Can the LTC3315AJV#TRPBF operate with 100% duty cycle, and under what conditions?
Yes, the LTC3315AJV#TRPBF supports up to 100% duty cycle operation for low-dropout regulation, as explicitly stated in the FEATURES section and confirmed in the Electrical Characteristics table (Maximum Duty Cycle = 100%). This occurs when the input voltage approaches the output voltage (e.g., VIN = 1.25V, VOUT = 1.2V), allowing continued regulation without dropout-essential for maintaining CPU core voltage during brownout events in automotive systems using the LTC3315AJV#TRPBF.
LTC3315AJV#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.25V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 2A, 2A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-LQFN (2x2)
LTC3315AJV#TRPBF FAQ
1.How can I place an order for LTC3315AJV#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3315AJV#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 LTC3315AJV#TRPBF reliable?
The price and inventory of LTC3315AJV#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3315AJV#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3315AJV#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3315AJV#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3315AJV#TRPBF?
LTC3315AJV#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3315AJV#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 LTC3315AJV#TRPBF?
For technical support, including LTC3315AJV#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3315AJV#TRPBF requirements.
6.How does Aetrix verify that LTC3315AJV#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3315AJV#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 LTC3315AJV#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3315AJV#TRPBF?
All LTC3315AJV#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3315AJV#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 LTC3315AJV#TRPBF part is unused and in its original packaging.
Return procedure for LTC3315AJV#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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