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Analog Devices Inc. LTC3315AEV#TRPBF
- Part No.:
- LTC3315AEV#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-VFQFN Exposed Pad
- Datasheet:
-
LTC3315AEV#TRPBF.pdf
- Description:
- IC REG BUCK 0.5V 2A DL 12LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:548
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Product details
Overview
LTC3315AEV#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, with integrated 19mΩ NMOS and 75mΩ PMOS switches, 2MHz fixed switching frequency, ±1% output voltage accuracy, and operation down to 0.5V output - designed for FPGA, ASIC, and µP core power in space-constrained industrial and automotive POL systems.
For engineers reviewing the LTC3315AEV#TRPBF datasheet, LTC3315AEV#TRPBF pinout, LTC3315AEV#TRPBF application, or LTC3315AEV#TRPBF equivalent, key selection criteria include dual 2A output capability, 25ns minimum on-time for high VIN-to-VOUT ratios, forced continuous/pulse-skip/Burst Mode® operation modes, AEC-Q100 qualification (Grade E), and thermal performance in the 2mm × 2mm LQFN package.
Technical Context
The LTC3315AEV#TRPBF 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 event-driven sequencing.
It supports three operating modes via the MODE/SYNC pin: pulse-skipping (low-noise), forced continuous (fixed-frequency, minimal ripple), and Burst Mode® (high light-load efficiency). Synchronization to an external 1MHz–3MHz clock is supported, with automatic slope compensation adaptation and forced continuous mode 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 for modern low-voltage processors and FPGAs. |
| Output Accuracy | ±1% over line, load, and temperature - ensures stable logic-level compliance for sensitive digital loads. |
| Switching Frequency | 2MHz (default), synchronizable 1–3MHz - allows compact 880nH inductors and reduces output capacitor count. |
| Min On-Time | 25ns - supports high step-down ratios (e.g., 5.5V → 0.8V at 2MHz) without pulse skipping. |
| Quiescent Current | 1.2µA shutdown, 70µA (Burst Mode, both bucks sleeping) - extends battery life in always-on subsystems. |
| Thermal Rating | –40°C to +125°C junction - qualified for under-hood automotive and industrial edge computing environments. |
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 | Active-high enable inputs | 400mV precision threshold enables power-up sequencing; must not be floated. |
| FB1 / FB2 | Feedback inputs | Regulated to 500mV (typ); sets VOUT via resistor divider; supports phase-lead compensation. |
| SW1 / SW2 | Switch nodes | High-current paths to external inductors; require short, wide PCB traces to minimize EMI and losses. |
| VIN (Pins 7,10) | Input supply | Dual VIN pins reduce IR drop and improve current sharing; each requires local low-ESR ceramic bypass. |
| GND (Pins 8,9,13) | Ground terminals | Exposed pad (Pin 13) is primary thermal path; must be soldered to solid ground plane for θJA = 51°C/W. |
| MODE/SYNC | Mode control & sync input | Configures operation mode (low = pulse-skip, float = forced continuous, high = Burst Mode®); accepts 1–3MHz external clock. |
| PGOOD | Open-drain status output | Asserts low if either enabled output deviates >3% below or >10% above regulation - enables system-level fault monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 2A synchronous buck channels | Reduces board area vs. discrete solutions; eliminates need for external MOSFET drivers or gate resistors. |
| 180° interleaved switching | Cuts input/output ripple current by ~70%, allowing smaller input capacitors and lower EMI filtering cost. |
| Burst Mode® operation | Achieves >85% efficiency at 1mA load - critical for standby power in automotive infotainment and IoT edge nodes. |
| Internal soft-start and compensation | Eliminates external compensation networks; 0.25–3ms programmable soft-start prevents inrush-induced rail collapse. |
| Output overvoltage & short-circuit protection | Prevents damage to downstream logic during fault conditions without requiring external circuitry. |
| AEC-Q100 Grade E qualification | Validated for automotive applications including ADAS domain controllers and body electronics modules. |
Applications
| FPGA Core Power Supply | Automotive ADAS Domain Controller |
|---|---|
Use Scenario: Providing tightly regulated 0.8V/1.2V dual-rail power to Xilinx Zynq UltraScale+ MPSoC in compact embedded vision systems. IC Role / Device Role / Timing Role: Dual-channel POL regulator delivering 2A per rail with <100µs transient response and ±1% DC accuracy. Use Value: Enables reliable high-speed configuration and real-time processing without voltage droop-induced bit errors or resets. | Use Scenario: Powering radar SoC and camera ISP in ISO 26262-compliant ADAS ECUs operating at –40°C to +125°C ambient. IC Role / Device Role / Timing Role: AEC-Q100 qualified dual buck supplying 1.8V/3.3V rails with PGOOD fault signaling and thermal shutdown. Use Value: Meets ASIL-B functional safety requirements through built-in OV/UV/OT protection and validated lifetime reliability. |
| Industrial PLC I/O Module | Optical Networking Line Card |
Use Scenario: Generating isolated 3.3V and 5V auxiliary supplies for analog front-end and communication interfaces in DIN-rail mounted PLCs. IC Role / Device Role / Timing Role: High-efficiency dual buck converting 12V intermediate bus to low-noise digital rails with Burst Mode® for low-idle consumption. Use Value: Reduces thermal load in sealed enclosures while maintaining fast load-step response for sensor data acquisition bursts. | Use Scenario: Delivering 1.2V/1.8V core and I/O power to multi-gigabit SerDes transceivers in compact 1RU optical line cards. IC Role / Device Role / Timing Role: 2MHz synchronized dual buck minimizing conducted EMI near sensitive RF sections and enabling small 680nH inductors. Use Value: Achieves <15mVpp output ripple at full load - preventing jitter accumulation in high-speed serial links. |
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 |
|---|---|---|---|
| TPS6521845RSLR | Single-chip PMIC with 4 buck + 4 LDOs; 1.8V/3.3V fixed outputs; no external VOUT programming; 2.7–5.5V VIN. | Targeted at Sitara AM335x/AM437x; less flexible for custom VOUT but includes battery management and reset logic. | Select when integrating power tree for TI ARM processors; avoid when needing adjustable 0.5V–VIN outputs or AEC-Q100 compliance. |
| ISL8026IRZ-T7A | Dual 3A buck; 2.7–5.5V VIN; 600kHz–1.5MHz sync range; no Burst Mode®; 125°C max junction temp. | Higher current per channel but lower switching frequency limits inductor size reduction; lacks automotive qualification. | Select for higher-current legacy designs where 2MHz operation isn't required; avoid for automotive or ultra-compact layouts. |
Compared with TPS6521845RSLR and ISL8026IRZ-T7A, the LTC3315AEV#TRPBF offers superior flexibility in output voltage programming (0.5V–VIN), tighter DC accuracy (±1%), AEC-Q100 qualification, and 2MHz operation enabling smallest passive components - making it optimal for next-gen space- and thermal-constrained POL applications.
Availability
LTC3315AEV#TRPBF is available at Aetrix Electronics and suitable for FPGA core supplies, automotive ADAS domain controllers, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LTC3315AEV#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 optimized dual buck regulators for point-of-load applications demanding high efficiency, fast transient response, and automotive-grade reliability in minimal PCB area.
FAQ
What is the maximum junction temperature rating for the LTC3315AEV#TRPBF?
The LTC3315AEV#TRPBF is rated for operation up to +125°C junction temperature and is qualified to AEC-Q100 Grade E (–40°C to +125°C). Its thermal resistance is θJA = 51°C/W on a standard JEDEC 2S2P board, and the exposed pad must be soldered to a solid ground plane to achieve this rating. Exceeding 125°C continuously degrades long-term reliability.
Does the LTC3315AEV#TRPBF support output voltages below 1V?
Yes, the LTC3315AEV#TRPBF supports output voltages as low as 0.5V, regulated via external resistor dividers on FB1 and FB2 pins. The feedback reference is 500mV (±1%), enabling precise low-voltage core supplies for modern processors and FPGAs. For example, a 0.8V output is achieved using a 160kΩ top resistor and 100kΩ bottom resistor.
How does the MODE/SYNC pin configure operating modes on the LTC3315AEV#TRPBF?
The MODE/SYNC pin selects between three modes: grounded = pulse-skipping (low noise), floating = forced continuous (fixed 2MHz, minimal ripple), and tied to VIN = Burst Mode® (highest light-load efficiency). When driven by an external 1–3MHz clock, it synchronizes both bucks in forced continuous mode with automatic slope compensation adjustment.
Can the LTC3315AEV#TRPBF drive both buck channels simultaneously from a single 3.3V input?
Yes, the LTC3315AEV#TRPBF is fully specified to operate with both channels enabled from a 3.3V input, delivering up to 2A per channel at outputs such as 1.2V and 1.8V. Efficiency exceeds 90% across 100mA–2A loads in forced continuous mode, and thermal performance remains within spec with proper PCB layout and ground plane connection.
What protection features are integrated into the LTC3315AEV#TRPBF?
The LTC3315AEV#TRPBF includes output overvoltage protection (107–114% of VOUT), overtemperature shutdown (165°C with 5°C hysteresis), output short-circuit protection, and safe handling of inductor saturation during overload. It also provides PGOOD status signaling and 100% duty cycle capability for low-dropout operation during input brownout conditions.
LTC3315AEV#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:
- Fixed
- 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
- Frequency - Switching:
- 1MHz ~ 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-LQFN (2x2)
LTC3315AEV#TRPBF FAQ
1.How can I place an order for LTC3315AEV#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3315AEV#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 LTC3315AEV#TRPBF reliable?
The price and inventory of LTC3315AEV#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3315AEV#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3315AEV#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3315AEV#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3315AEV#TRPBF?
LTC3315AEV#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3315AEV#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 LTC3315AEV#TRPBF?
For technical support, including LTC3315AEV#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3315AEV#TRPBF requirements.
6.How does Aetrix verify that LTC3315AEV#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3315AEV#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 LTC3315AEV#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3315AEV#TRPBF?
All LTC3315AEV#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3315AEV#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 LTC3315AEV#TRPBF part is unused and in its original packaging.
Return procedure for LTC3315AEV#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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