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Analog Devices Inc. LTC3315BJV#TRMPBF
- Part No.:
- LTC3315BJV#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-VFQFN Exposed Pad
- Datasheet:
-
LTC3315BJV#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 2A/2A DL 12LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,088
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Product details
Overview
LTC3315BJV#TRMPBF from Analog Devices is a dual monolithic synchronous step-down DC/DC converter delivering 2A per channel from a 2.25V–5.5V input, regulating outputs as low as 500mV with ±1% feedback accuracy and 6MHz fixed switching frequency in a thermally enhanced 2mm × 2mm LQFN-12 package. It integrates two independent 2A buck regulators with 19mΩ NMOS and 75mΩ PMOS power switches, 25ns minimum on-time, and 100% duty cycle capability for ultra-low dropout operation - deployed in FPGA core supplies, automotive infotainment power rails, and space-constrained POL systems.
For engineers reviewing the LTC3315BJV#TRMPBF datasheet, LTC3315BJV#TRMPBF pinout, LTC3315BJV#TRMPBF application, or LTC3315BJV#TRMPBF equivalent, key selection criteria include its AEC-Q100 qualification (–40°C to +150°C junction), dual-phase 180° out-of-phase operation to reduce input ripple, Burst Mode® efficiency at light loads (1.2µA shutdown current), and MODE/SYNC pin programmability across forced continuous, pulse-skip, and Burst Mode® operation.
Technical Context
The LTC3315BJV#TRMPBF employs peak current mode control with internal compensation and a 6MHz default oscillator synchronized via MODE/SYNC pin across 3MHz–10MHz range. Each buck operates independently with dedicated EN1/EN2, FB1/FB2, and SW1/SW2 pins, while sharing VIN, GND, and PGOOD resources.
Its dual-buck architecture features 180° phase interleaving, precision 400mV enable thresholds with hysteresis, internal soft-start (0.25–3ms), output overvoltage protection (107–114% VOUT), and thermal shutdown at 165°C with 5°C hysteresis - all implemented within a single 12-lead LQFN package with exposed thermal pad (θJB = 12°C/W).
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 without external LDO pre-regulation. |
| Output Current | 2A per channel - enables compact dual-rail power delivery for FPGA I/O banks and multi-core processors. |
| Switching Frequency | 6MHz default, synchronizable 3–10MHz - allows use of sub-470nH inductors and <10µF ceramic output capacitors for minimal footprint. |
| Feedback Accuracy | ±1% over –40°C to +150°C - ensures stable core voltage regulation under automotive thermal stress. |
| Minimum On-Time | 25ns - enables high step-down ratios (e.g., 5.5V→0.5V at 6MHz) without pulse skipping artifacts. |
| Shutdown Current | 1.2µA - meets ultra-low-power system standby requirements in always-on automotive modules. |
| Thermal Rating | Junction temperature up to +150°C - qualified per AEC-Q100 Grade 1 for under-hood and ADAS ECU applications. |
Pinout & Package
Package: 12-lead 2mm × 2mm × 0.74mm LQFN with exposed thermal pad (Pin 13 = GND), MSL 3, rated for –40°C to +150°C junction operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1 (Pin 1) | Enable input for Buck 1 | Active-high with 400mV precision threshold; supports resistor-divider sequencing from upstream rail or microcontroller GPIO. |
| FB1 (Pin 2) | Feedback input for Buck 1 | Regulates VOUT1 to 500mV reference; sets output voltage via external resistor divider (e.g., 1.8V = 500mV × (R1+R2)/R2). |
| FB2 (Pin 3) | Feedback input for Buck 2 | Independent 500mV reference for second output; enables asymmetric dual-rail configurations (e.g., 1.2V + 2.5V). |
| EN2 (Pin 4) | Enable input for Buck 2 | Independent enable with same 400mV threshold; allows staggered power-up or fault-isolated shutdown. |
| PGOOD (Pin 5) | Open-drain power-good indicator | Asserts high only when both enabled outputs are within 97–99% of target and no overvoltage (>110%) or thermal fault exists. |
| SW2 (Pin 6) | Switch node for Buck 2 | Connects to inductor; requires short, wide PCB trace to minimize EMI and switching losses. |
| VIN (Pins 7, 10) | Input supply for internal circuitry and PMOS switches | Dual VIN pins reduce IR drop and improve thermal distribution; must be bypassed locally with low-ESR ceramics. |
| GND (Pins 8, 9, 13) | Power and signal ground | Exposed pad (Pin 13) is primary thermal path; must be soldered to solid PCB ground plane for θJB = 12°C/W performance. |
| SW1 (Pin 11) | Switch node for Buck 1 | Phase-aligned 180° from SW2; interleaving cuts input ripple current by ~70% vs. in-phase operation. |
| MODE/SYNC (Pin 12) | Mode selection and external clock input | Configures operating mode (low = pulse-skip, high = Burst Mode®, floating = forced continuous); accepts 3–10MHz square wave for synchronization. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 2A synchronous bucks in single LQFN | Reduces board area by >40% vs. discrete dual-buck solutions while maintaining independent output control and sequencing. |
| 180° phase interleaving | Cuts input capacitor RMS current and peak-to-peak ripple by ~70%, enabling smaller, lower-cost input bulk capacitance. |
| Burst Mode® operation | Achieves >85% efficiency at 1mA load with <10mVpp output ripple - critical for battery-backed automotive telematics modules. |
| 100% duty cycle capability | Supports dropout operation down to VOUT + (IL × RDS(ON)_PMOS), e.g., 1.8V output sustained at VIN = 1.85V with 2A load. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +150°C operation with lifetime reliability data - suitable for engine control, ADAS camera, and infotainment head units. |
| Integrated overvoltage & thermal protection | Shuts down PMOS within nanoseconds if FB exceeds 110% VOUT; restarts automatically after die cools below 160°C. |
Applications
| FPGA Core & I/O Power | Automotive Infotainment SoC |
|---|---|
Use Scenario: Powering Xilinx Artix-7 FPGA with 1.0V core and 1.8V I/O rails from a 3.3V intermediate bus. IC Role / Device Role / Timing Role: Dual-buck regulator providing independent, sequenced, and tightly regulated voltage domains with PGOOD monitoring for safe configuration loading. Use Value: Eliminates need for two discrete converters and external sequencing IC; 6MHz switching enables <1mm² total passive area per rail. |
Use Scenario: Supplying Qualcomm SA8155P SoC in digital cockpit display with 1.1V CPU, 1.8V GPU, and 3.3V interface rails. IC Role / Device Role / Timing Role: AEC-Q100-qualified dual-buck delivering fault-tolerant, thermally robust power with PGOOD reporting to vehicle MCU for ASIL-B compliance. Use Value: Meets automotive thermal cycling requirements (-40°C to +105°C ambient) with 150°C junction rating and integrated OVP/OTP. |
| Optical Networking POL | Industrial PLC I/O Module |
Use Scenario: Point-of-load regulation for 100G optical transceiver DSPs requiring 0.85V @ 2A and 1.2V @ 2A from a 48V-derived 5V bus. IC Role / Device Role / Timing Role: High-frequency dual-buck converting 5V to low-voltage rails with minimal layout area and fast transient response to bursty data traffic loads. Use Value: 25ns min-on-time supports 0.85V output at 6MHz; 180° interleaving reduces input ripple, easing EMI filtering for Class B compliance. |
Use Scenario: Powering ARM Cortex-M7-based PLC controller with 1.2V core, 3.3V peripherals, and isolated CAN transceiver from 24V industrial supply. IC Role / Device Role / Timing Role: Dual-buck generating core and interface rails with precise enable thresholds for deterministic power-up sequencing across distributed I/O nodes. Use Value: 400mV EN thresholds allow direct GPIO control without level shifters; 1.2µA shutdown current extends backup battery life during brownout events. |
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 3 buck + 4 LDOs; 3A max per buck; 2.7–5.5V VIN; no AEC-Q100 rating; 2.5mm × 3mm QFN-32. | Targeted at Sitara AM335x/AM437x processors; lacks 150°C rating and 25ns min-on-time for ultra-low-VOUT designs. | Select when integrating multiple rails beyond dual-buck and cost-sensitive non-automotive industrial use is prioritized. |
| ISL8026AIRZ-T7A | Dual 3A buck; 2.7–5.5V VIN; 600kHz–4MHz sync range; ±2% VFB accuracy; 16-lead 4mm × 4mm QFN; no AEC-Q100. | Higher current per channel but larger footprint and looser regulation accuracy; thermal rating limited to +125°C. | Select for higher-current needs where board space and automotive qualification are secondary to cost and availability. |
Compared with TPS6521845RSLR and ISL8026AIRZ-T7A, the LTC3315BJV#TRMPBF delivers superior thermal robustness (150°C), tighter regulation (±1%), smaller footprint (2mm² vs. ≥12mm²), and faster transient response due to 6MHz operation - making it optimal for space- and reliability-critical automotive and optical networking POL.
Availability
LTC3315BJV#TRMPBF is available at Aetrix Electronics and suitable for automotive infotainment systems, FPGA power delivery, and optical networking point-of-load applications requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle support.
Supply support for LTC3315BJV#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC3315B product line delivers highly integrated, thermally optimized dual-buck regulators for space-constrained, high-reliability applications - specifically engineered for automotive ADAS, FPGA/ASIC core supplies, and next-generation optical networking equipment.
FAQ
What is the maximum junction temperature rating for LTC3315BJV#TRMPBF?
The LTC3315BJV#TRMPBF is rated for operation up to +150°C junction temperature and is AEC-Q100 qualified for automotive Grade 1 applications. Its overtemperature shutdown activates at 165°C (typical) with 5°C hysteresis, and thermal performance relies on proper soldering of the exposed pad (Pin 13) to a PCB ground plane to achieve θJB = 12°C/W.
Does LTC3315BJV#TRMPBF support independent voltage programming for each output?
Yes, LTC3315BJV#TRMPBF supports fully independent output voltage programming via separate FB1 and FB2 pins, each regulated to a precise 500mV internal reference. Designers set VOUT1 using resistors from VOUT1 to FB1 and GND, and VOUT2 using a separate divider from VOUT2 to FB2 and GND - enabling asymmetric rails such as 1.0V/1.8V or 0.85V/2.5V.
How does the MODE/SYNC pin configure operating modes on LTC3315BJV#TRMPBF?
The MODE/SYNC pin on LTC3315BJV#TRMPBF selects between three modes: grounded for pulse-skip, tied to VIN for Burst Mode®, and left floating for forced continuous conduction. When driven by an external 3–10MHz clock, it synchronizes both bucks in forced continuous mode with 180° phase offset - the internal PLL locks to the external source within microseconds.
What protection features are integrated into LTC3315BJV#TRMPBF?
LTC3315BJV#TRMPBF integrates output overvoltage protection (shuts off PMOS if FB > 110% VOUT), thermal shutdown (165°C trip), short-circuit protection, and reverse inductor current limiting. It also provides PGOOD monitoring with 120µs filtering to distinguish faults from transients, and automatic soft-start recovery after UVLO or thermal events.
Can LTC3315BJV#TRMPBF operate with input voltage below 2.25V?
No, LTC3315BJV#TRMPBF has a specified minimum input voltage of 2.25V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below this threshold risks undervoltage lockout activation (UVLO rising threshold = 2.15V typical) and undefined behavior; the device will not regulate or switch reliably below 2.25V.
LTC3315BJV#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:
- 6MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-LQFN (2x2)
LTC3315BJV#TRMPBF FAQ
1.How can I place an order for LTC3315BJV#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3315BJV#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 LTC3315BJV#TRMPBF reliable?
The price and inventory of LTC3315BJV#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3315BJV#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3315BJV#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3315BJV#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3315BJV#TRMPBF?
LTC3315BJV#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3315BJV#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 LTC3315BJV#TRMPBF?
For technical support, including LTC3315BJV#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3315BJV#TRMPBF requirements.
6.How does Aetrix verify that LTC3315BJV#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3315BJV#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 LTC3315BJV#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3315BJV#TRMPBF?
All LTC3315BJV#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3315BJV#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 LTC3315BJV#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3315BJV#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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