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Analog Devices Inc. LTC3315AMPV#TRPBF
- Part No.:
- LTC3315AMPV#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-VFQFN Exposed Pad
- Datasheet:
-
LTC3315AMPV#TRPBF.pdf
- Description:
- IC REG BUCK 0.5V 2A DL 12LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,902
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Product details
Overview
LTC3315AMPV#TRPBF from Analog Devices is a dual-channel monolithic synchronous step-down DC/DC converter delivering 2A per channel from a 2.25V–5.5V input, featuring 2MHz fixed switching frequency, 500mV feedback reference, and ±1% VOUT accuracy. It integrates two independent buck regulators with shared MODE/SYNC control, internal compensation, and PGOOD monitoring - designed for space-constrained FPGA, ASIC, and automotive core power applications.
For engineers reviewing the LTC3315AMPV#TRPBF datasheet, LTC3315AMPV#TRPBF pinout, LTC3315AMPV#TRPBF application, or LTC3315AMPV#TRPBF equivalent, key selection criteria include its –55°C to 150°C extended temperature rating, 25ns minimum on-time, 19mΩ NMOS / 75mΩ PMOS RDS(ON), dual-phase 180° interleaving, and AEC-Q100 qualification for automotive use.
Technical Context
The LTC3315AMPV#TRPBF implements peak current mode control with dual independent feedback loops (FB1/FB2) regulating outputs down to 0.5V via external resistor dividers. Its internal 2MHz oscillator supports synchronization from 1MHz to 3MHz via the MODE/SYNC pin, forcing both channels into forced continuous mode during sync.
Each channel features independent enable inputs (EN1/EN2) with 400mV precision thresholds, 100% duty cycle capability for low-dropout operation, and comprehensive protection including overvoltage (107–114% of VOUT), thermal shutdown (165°C), and short-circuit detection. The device operates in Burst Mode®, pulse-skipping, or forced continuous modes - selected by MODE/SYNC voltage level.
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. |
| Output Current | 2A per channel - enables compact dual-core supply for FPGAs or multi-rail SoCs in <4mm² footprint. |
| Switching Frequency | 2MHz (default), synchronizable 1–3MHz - allows use of sub-1µH inductors and reduces output ripple filtering area. |
| Feedback Voltage | 500mV ±5mV - enables precise low-VOUT regulation (e.g., 0.8V @ ±1%) with minimal divider error sensitivity. |
| Min On-Time | 25ns - supports high VIN-to-VOUT ratios (e.g., 5.5V→0.8V at 2MHz) without pulse skipping instability. |
| Efficiency | Up to 95% at 2A (VIN=3.3V, VOUT=1.2V) - achieved via 19mΩ NMOS + 75mΩ PMOS integrated switches. |
| Temp Range | –55°C to +150°C - qualified for under-hood automotive, industrial, and aerospace environments. |
Pinout & Package
Package: 12-lead 2mm × 2mm × 0.74mm LQFN with exposed thermal pad (Pin 13 = GND). Pinout validated per Analog Devices LTC3315A Rev. B datasheet, Figure "PIN CONFIGURATION" (LQFN top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1 (Pin 1) | Buck 1 Enable Input | Active-high logic with 400mV precision threshold; enables sequencing control via resistor divider from upstream rail. |
| FB1 (Pin 2) | Buck 1 Feedback Input | Senses output voltage divider midpoint; regulated to 500mV - sets VOUT = 500mV × (1 + R1/R2). |
| FB2 (Pin 3) | Buck 2 Feedback Input | Independent feedback node for second output; identical 500mV reference enables asymmetric dual-rail design. |
| EN2 (Pin 4) | Buck 2 Enable Input | Separate enable for independent power-up timing; supports staggered core/IO rail sequencing. |
| PGOOD (Pin 5) | Open-Drain Power Good | Asserts high only when both enabled outputs are within 97–99% of target - used for system reset or downstream enable. |
| SW2 (Pin 6) | Buck 2 Switch Node | Connects to inductor; carries high di/dt - requires short, wide PCB trace and local ceramic bypass. |
| VIN (Pins 7,10) | Input Supply | Dual VIN pins reduce IR drop and improve thermal distribution; each requires dedicated 10µF low-ESR ceramic cap. |
| GND (Pins 8,9,13) | Ground & Thermal Pad | Exposed pad (Pin 13) must be soldered to solid ground plane for θJB = 12°C/W thermal performance. |
| SW1 (Pin 11) | Buck 1 Switch Node | Phase-shifted 180° from SW2 - reduces input ripple current and eases input capacitor sizing. |
| MODE/SYNC (Pin 12) | Mode Control / Clock Input | Configures operating mode (low = pulse-skip, float = forced continuous, high = Burst Mode); accepts 1–3MHz external clock. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 2A Synchronous Bucks | Two fully independent, internally compensated regulators in one package - eliminates discrete controller + MOSFET layout complexity. |
| 180° Interleaved Operation | Reduces input RMS current by ~30% vs. non-interleaved, lowering required input capacitance and EMI filter size. |
| AEC-Q100 Qualified | Rated for automotive under-hood use (–55°C to +150°C junction); includes production test screening per automotive reliability standards. |
| Three Operating Modes | Selectable via single pin: Burst Mode® (high efficiency <10mA), pulse-skipping (low noise), or forced continuous (fixed-frequency, lowest ripple). |
| Robust Protection Suite | Includes output overvoltage lockout (107–114%), thermal shutdown (165°C), short-circuit detection, and safe inductor saturation tolerance. |
Applications
| FPGA Core & I/O Supplies | Automotive ADAS Processors |
|---|---|
Use Scenario: Powering Xilinx Artix-7 FPGA with 0.8V core and 1.8V I/O rails from a 3.3V intermediate bus. IC Role / Device Role / Timing Role: Dual-buck regulator providing tightly regulated, sequenced, low-noise supplies with PGOOD coordination. Use Value: Eliminates need for two separate converters; 25ns min-on-time ensures stable 0.8V generation at 2MHz, reducing board area by >40%. | Use Scenario: Supplying NVIDIA DRIVE Orin SoC core (1.0V/3A) and memory interface (1.1V/2.5A) in radar ECU. IC Role / Device Role / Timing Role: AEC-Q100-qualified dual regulator delivering fault-tolerant, thermally robust power with thermal derating up to 150°C. Use Value: Extended temperature rating avoids external heatsinking; PGOOD and OVP meet ISO 26262 ASIL-B functional safety requirements. |
| Industrial PLC CPU Modules | Optical Networking Line Cards |
Use Scenario: Generating 1.2V CPU core and 3.3V peripheral rails from 5V backplane in DIN-rail mounted controller. IC Role / Device Role / Timing Role: High-efficiency dual buck with forced continuous mode for low ripple in noise-sensitive analog sections. Use Value: 95% peak efficiency at full load extends thermal margin; 100% duty cycle supports brownout operation down to 1.2V out. | Use Scenario: Powering DSP and transceiver ICs in 100G coherent optical modules with strict EMI limits. IC Role / Device Role / Timing Role: Interleaved dual buck minimizing input ripple and conducted emissions; synchronized to system clock for spectral spreading. Use Value: 2MHz sync capability aligns switching edges to avoid critical bands; Burst Mode® cuts standby power to <1.2µA. |
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 |
|---|---|---|---|
| LTC3315AEV#TRPBF | Same architecture and pinout; rated for –40°C to +125°C (vs. –55°C to +150°C). | Not qualified for extended automotive or aerospace thermal environments. | Select when ambient temperature stays above –40°C and cost optimization is prioritized over extreme temp range. |
| TPS65218D0RSLR | Quad-buck PMIC with integrated LDOs and battery charger; 1.8V/1.5A + 3.3V/1.5A outputs; no 25ns min-on-time or AEC-Q100 rating. | Targets portable battery-powered systems, not high-temp industrial or automotive. | Choose only if system requires integrated battery management and multiple lower-current rails - not a direct replacement. |
Compared with LTC3315AEV#TRPBF, the LTC3315AMPV#TRPBF adds 15°C lower cold-start capability and full AEC-Q100 compliance; versus TPS65218D0RSLR, it trades integration for higher per-channel current, tighter thermal specs, and deterministic 2MHz operation - making it superior for ruggedized dual-rail core power.
Availability
LTC3315AMPV#TRPBF is available at Aetrix Electronics and suitable for automotive ADAS ECUs, industrial PLCs, and optical networking line cards requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3315AMPV#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, Inc. 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 space-constrained, high-reliability applications demanding extended temperature operation and AEC-Q100 compliance.
FAQ
What is the operating temperature range of the LTC3315AMPV#TRPBF?
The LTC3315AMPV#TRPBF is specified for a junction temperature range of –55°C to +150°C, with storage rated from –65°C to +150°C. This extended range meets AEC-Q100 Grade 1 requirements and supports under-hood automotive, industrial control, and aerospace applications where ambient temperatures exceed standard commercial or industrial grades. The LTC3315AMPV#TRPBF achieves this via enhanced process and packaging controls verified in production screening.
Does the LTC3315AMPV#TRPBF support external frequency synchronization?
Yes, the LTC3315AMPV#TRPBF supports external clock synchronization from 1MHz to 3MHz via the MODE/SYNC pin. When an external square wave is applied, both buck regulators lock to the input clock edge with Buck 1 aligned to the rising edge and Buck 2 phase-shifted by 180°. During sync, the device automatically enters forced continuous mode and adapts slope compensation - ensuring stable operation without manual tuning. The LTC3315AMPV#TRPBF maintains this behavior across its full temperature and input voltage range.
How does the PGOOD function work on the LTC3315AMPV#TRPBF?
The PGOOD pin on the LTC3315AMPV#TRPBF is an open-drain output that goes high only when both enabled buck regulators maintain their outputs within 97% to 99% of the programmed VOUT. If either output drops below 97% (undervoltage) or rises above 107–114% (overvoltage), PGOOD is pulled low. When both EN1 and EN2 are low, PGOOD remains low. This behavior enables system-level power sequencing and fault detection - critical for FPGA configuration and automotive ECU boot integrity. The LTC3315AMPV#TRPBF guarantees PGOOD delay ≤120µs.
What are the key differences between Burst Mode® and forced continuous mode on the LTC3315AMPV#TRPBF?
In Burst Mode®, the LTC3315AMPV#TRPBF minimizes light-load quiescent current (<1.2µA in shutdown, ~70µA with both bucks sleeping) by cycling between active bursts and deep sleep - ideal for battery-backed systems. Forced continuous mode maintains constant 2MHz switching regardless of load, eliminating low-frequency ripple and enabling predictable EMI filtering - preferred for noise-sensitive analog circuits. The LTC3315AMPV#TRPBF selects mode via MODE/SYNC pin voltage: high = Burst, floating = forced continuous, low = pulse-skipping. All modes retain full protection and regulation accuracy.
Can the LTC3315AMPV#TRPBF operate with only one buck enabled?
Yes, the LTC3315AMPV#TRPBF supports independent operation of either buck channel. Driving EN1 high while holding EN2 low enables only Buck 1; conversely, EN2 high with EN1 low enables only Buck 2. Each channel retains full functionality - including soft-start, PGOOD contribution, and protection - when operated singly. Quiescent current scales accordingly: ~45µA with one buck enabled in Burst Mode®, ~70µA with both. This flexibility allows partial-power designs and staged system bring-up - a key capability confirmed in the LTC3315AMPV#TRPBF's electrical characteristics table.
LTC3315AMPV#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:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-LQFN (2x2)
LTC3315AMPV#TRPBF FAQ
1.How can I place an order for LTC3315AMPV#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3315AMPV#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 LTC3315AMPV#TRPBF reliable?
The price and inventory of LTC3315AMPV#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3315AMPV#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3315AMPV#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3315AMPV#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3315AMPV#TRPBF?
LTC3315AMPV#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3315AMPV#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 LTC3315AMPV#TRPBF?
For technical support, including LTC3315AMPV#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3315AMPV#TRPBF requirements.
6.How does Aetrix verify that LTC3315AMPV#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3315AMPV#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 LTC3315AMPV#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3315AMPV#TRPBF?
All LTC3315AMPV#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3315AMPV#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 LTC3315AMPV#TRPBF part is unused and in its original packaging.
Return procedure for LTC3315AMPV#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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