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Analog Devices Inc. LTC3315AJV#TRMPBF
- Part No.:
- LTC3315AJV#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-VFQFN Exposed Pad
- Datasheet:
-
LTC3315AJV#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 2A/2A DL 12LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:319
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Product details
Overview
LTC3315AJV#TRMPBF 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, with integrated 19mΩ NMOS and 75mΩ PMOS switches, 2MHz default switching frequency, ±1% output voltage accuracy, and operation up to 150°C junction temperature. It serves as a compact, high-efficiency core power supply for FPGA, ASIC, and microprocessor applications in automotive and industrial systems.
For engineers reviewing the LTC3315AJV#TRMPBF datasheet, LTC3315AJV#TRMPBF pinout, LTC3315AJV#TRMPBF application, or LTC3315AJV#TRMPBF equivalent, key selection criteria include dual 2A output capability, 25ns minimum on-time for low-duty-cycle regulation down to 0.5V, forced continuous/pulse-skipping/Burst Mode® operation, thermal grade (–40°C to 150°C), and LQFN package compatibility with POL designs requiring minimal footprint and high thermal performance.
Technical Context
The LTC3315AJV#TRMPBF integrates two independent peak-current-mode controlled buck regulators sharing a common oscillator and MODE/SYNC interface. Each channel features separate EN, FB, and SW pins, 180° phase interleaving, internal soft-start, and precision 400mV enable thresholds enabling sequenced power-up.
It supports three operating modes via the MODE/SYNC pin: pulse-skipping (low-noise), forced continuous (fixed-frequency, low-ripple), and Burst Mode® (high light-load efficiency). Synchronization to external clocks from 1MHz to 3MHz is supported, with automatic slope compensation adaptation and guaranteed forced continuous operation during sync.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - Supports single-cell Li-ion, USB PD, and intermediate bus rails without pre-regulation. |
| VOUT Range | 0.5V to VIN - Enables direct core supply generation for modern low-voltage processors and FPGAs. |
| Output Accuracy | ±1% - Ensures stable regulation under line/load/temperature variation for sensitive digital loads. |
| Switching Frequency | 2MHz (default), synchronizable 1–3MHz - Enables use of sub-1µH inductors and compact ceramic output capacitors. |
| Min On-Time | 25ns - Allows high step-down ratios (e.g., 5.5V→0.5V at 2MHz) without pulse skipping at light load. |
| Junction Temp Range | –40°C to 150°C - Qualified for under-hood automotive and high-ambient industrial environments. |
| Shutdown Current | 1.2µA - Minimizes battery drain in always-on systems with deep sleep states. |
Pinout & Package
The LTC3315AJV#TRMPBF is packaged in a thermally enhanced 12-lead 2mm × 2mm × 0.74mm LQFN with exposed GND pad (Pin 13). Pin assignment is identical across all LQFN variants including the J-grade.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1 / EN2 | Active-high enable inputs | Independent control of each buck; 400mV precision threshold enables resistor-divider sequencing from upstream rails. |
| FB1 / FB2 | Feedback inputs | Regulates VOUT to 500mV reference; supports external resistive dividers for programmable output voltages. |
| SW1 / SW2 | Switch nodes | Connect to external inductors; dual-phase 180° interleaving reduces input/output ripple current by ~70%. |
| VIN (Pins 7,10) | Input supply | Dual VIN pins reduce IR drop and improve high-current delivery; require local low-ESR ceramic bypassing. |
| GND (Pins 8,9,13) | Ground terminals | Exposed thermal pad (Pin 13) must be soldered to PCB ground plane for θJB = 12°C/W thermal performance. |
| MODE/SYNC | Mode select & sync input | Configures operating mode (pulse-skip/Burst/FC) or accepts external 1–3MHz clock for deterministic timing. |
| PGOOD | Open-drain power-good | Asserts high when both enabled outputs are within 97–99% of target; enables system-level power sequencing and fault detection. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 2A synchronous bucks | Single-package solution eliminates discrete layout complexity and inter-channel coupling in multi-rail POL systems. |
| 180° phase interleaving | Reduces input RMS current by ~30% and output voltage ripple amplitude, easing EMI filtering requirements. |
| Burst Mode® operation | Achieves >85% efficiency at 1mA load while maintaining <20mVpp output ripple-critical for battery-powered standby modes. |
| Internal soft-start & compensation | Eliminates need for external compensation networks; 0.25–3ms programmable soft-start prevents inrush-induced rail collapse. |
| Overvoltage & short-circuit protection | Hardware-based OV detection (107–114% of VOUT) and cycle-by-cycle current limiting prevent damage during fault conditions. |
Applications
| FPGA Core Power Supply | Automotive ADAS Domain Controller |
|---|---|
Use Scenario: Providing tightly regulated 0.8V/1.2V dual-core supplies to Xilinx Zynq or Intel Agilex FPGAs with dynamic load steps up to 2A/µs. IC Role / Device Role / Timing Role: Dual-channel synchronous buck regulator delivering fast transient response (<10µs recovery) and precise voltage tracking via independent FB pins. Use Value: 25ns min-on-time and 2MHz switching enable sub-1µH inductor use, reducing board area by >40% vs lower-frequency alternatives while maintaining ±1% regulation. | Use Scenario: Powering radar SoC, camera ISP, and CAN-FD microcontrollers in AEC-Q100-compliant domain controllers operating at 125°C ambient. IC Role / Device Role / Timing Role: High-temp-rated dual buck supplying 1.8V I/O and 1.0V core rails with PGOOD sequencing and thermal shutdown at 165°C. Use Value: –40°C to 150°C junction rating and automotive qualification ensure reliability in engine bay and chassis-mounted ECUs without derating. |
| Industrial PLC CPU Module | Optical Networking Line Card |
Use Scenario: Generating isolated 3.3V and 5V auxiliary rails from a 48V backplane in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Dual buck regulator operating in forced continuous mode to minimize conducted EMI in noise-sensitive analog signal chains. Use Value: Fixed 2MHz frequency and 180° phase alignment suppress fundamental switching harmonics, easing compliance with CISPR 11 Class A limits. | Use Scenario: Delivering 1.2V/2.5V bias to DSPs, transceivers, and laser drivers in compact 1RU optical line cards with strict thermal constraints. IC Role / Device Role / Timing Role: Compact dual buck with 2mm × 2mm LQFN footprint enabling dense power delivery adjacent to BGA packages. Use Value: Exposed-pad thermal design achieves θJB = 12°C/W, allowing full 2A/channel operation at 70°C ambient without airflow-reducing need for heatsinks or fans. |
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 |
|---|---|---|---|
| TPS652170RSLR | Single 3A + dual 1.5A channels; integrated LDOs; 2.7–5.5V input; 1.2MHz max fSW; no Burst Mode® | Targeted at portable battery-powered systems with mixed analog/digital rails; lacks 150°C rating and 25ns min-on-time | Prefer LTC3315AJV#TRMPBF for high-temp, high-density POL where dual 2A capability and ultra-low min-on-time are required. |
| ISL8026IRZ | Dual 3A channels; 2.7–5.5V input; 2.5MHz max fSW; ±2% VFB accuracy; no PGOOD or sync capability | Designed for telecom infrastructure; lacks automotive qualification, thermal grade, and precision enable thresholds | Choose LTC3315AJV#TRMPBF when AEC-Q100 compliance, 400mV enable accuracy, and external clock synchronization are mandatory. |
Compared with TPS652170RSLR and ISL8026IRZ, the LTC3315AJV#TRMPBF uniquely combines automotive-grade temperature range (–40°C to 150°C), 25ns minimum on-time for ultra-low VOUT capability, and Burst Mode® efficiency below 1mA-making it optimal for space-constrained, thermally aggressive, and battery-sensitive dual-rail applications.
Availability
LTC3315AJV#TRMPBF is available at Aetrix Electronics and suitable for FPGA core supplies, automotive ADAS domain controllers, and industrial PLC CPU modules requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for LTC3315AJV#TRMPBF 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 optimized for point-of-load power in space- and thermal-constrained applications such as automotive infotainment, server memory modules, and optical networking equipment.
FAQ
What is the maximum junction temperature rating for the LTC3315AJV#TRMPBF?
The LTC3315AJV#TRMPBF is rated for operation from –40°C to 150°C junction temperature, with overtemperature shutdown activating at 165°C. This J-grade variant is specifically qualified for under-hood automotive and high-ambient industrial environments where extended thermal margins are critical. The device maintains full electrical specifications across this range, unlike lower-grade versions (e.g., E/I-grade) limited to 125°C.
Does the LTC3315AJV#TRMPBF support external clock synchronization?
Yes, the LTC3315AJV#TRMPBF supports external clock synchronization via its MODE/SYNC pin, accepting square-wave inputs from 1MHz to 3MHz. During synchronization, both buck regulators operate in forced continuous mode with Buck 1 aligned to the rising edge of the external clock and Buck 2 phase-shifted by 180°. The internal PLL automatically adapts slope compensation to maintain stability across the sync range.
How does the LTC3315AJV#TRMPBF achieve high efficiency at light loads?
The LTC3315AJV#TRMPBF achieves high light-load efficiency through Burst Mode® operation, where the controller enters a low-power sleep state while the output capacitor supplies the load. When VOUT drops below the PGOOD threshold (typically 97% of target), the regulator wakes and delivers a burst of switching cycles. This reduces quiescent current to ~70µA with both bucks enabled, sustaining >85% efficiency at 1mA load.
What package type and thermal characteristics apply to the LTC3315AJV#TRMPBF?
The LTC3315AJV#TRMPBF uses a 12-lead 2mm × 2mm × 0.74mm LQFN package with an exposed GND pad (Pin 13). Its thermal performance is characterized by θJA = 51°C/W and θJB = 12°C/W when mounted on a standard JEDEC 2S2P test board. Proper soldering of the exposed pad to a solid PCB ground plane is mandatory to achieve rated thermal resistance and sustained 2A/channel operation at elevated ambient temperatures.
Can the LTC3315AJV#TRMPBF regulate outputs below 1V?
Yes, the LTC3315AJV#TRMPBF can regulate outputs as low as 0.5V using external feedback resistors. Its 500mV internal reference and ±1% VFB accuracy enable precise low-voltage generation-for example, 0.8V at 2A for modern FPGA cores. The 25ns minimum on-time ensures stable operation even at high step-down ratios (e.g., 5.5V→0.5V at 2MHz), avoiding pulse-skipping artifacts that degrade regulation at light loads.
LTC3315AJV#TRMPBF 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#TRMPBF FAQ
1.How can I place an order for LTC3315AJV#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3315AJV#TRMPBF 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#TRMPBF reliable?
The price and inventory of LTC3315AJV#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3315AJV#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3315AJV#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3315AJV#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3315AJV#TRMPBF?
LTC3315AJV#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3315AJV#TRMPBF 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#TRMPBF?
For technical support, including LTC3315AJV#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3315AJV#TRMPBF requirements.
6.How does Aetrix verify that LTC3315AJV#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3315AJV#TRMPBF 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#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3315AJV#TRMPBF?
All LTC3315AJV#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3315AJV#TRMPBF, 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#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3315AJV#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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