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Analog Devices Inc. LTC3315AEV#TRMPBF
- Part No.:
- LTC3315AEV#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-VFQFN Exposed Pad
- Datasheet:
-
LTC3315AEV#TRMPBF.pdf
- Description:
- IC REG BUCK 0.5V 2A DL 12LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:446
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Product details
Overview
LTC3315AEV#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, regulating outputs down to 0.5V with ±1% accuracy in a compact 2mm × 2mm LQFN-12 package. It integrates two independent 2MHz buck regulators with peak current mode control, 25ns minimum on-time, and integrated 19mΩ NMOS / 75mΩ PMOS power switches-designed for FPGA core supplies and space-constrained POL applications.
For engineers reviewing the LTC3315AEV#TRMPBF datasheet, LTC3315AEV#TRMPBF pinout, LTC3315AEV#TRMPBF application, or LTC3315AEV#TRMPBF equivalent, key selection considerations include its dual-output synchronization capability, Burst Mode® efficiency at light loads (1.2µA shutdown current), 180° phase interleaving for reduced input ripple, and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The LTC3315AEV#TRMPBF implements constant-frequency peak current mode control with internal compensation and 180° interleaved switching between its two buck channels-enabling lower input capacitor RMS current and improved transient response. Its MODE/SYNC pin supports three operating modes: forced continuous (fixed 2MHz), pulse-skipping, or Burst Mode®-with automatic adaptation of slope compensation during external clock synchronization (1–3MHz range).
Each channel features independent enable (400mV precision threshold), feedback (regulated to 500mV), and power-good monitoring, with integrated protections including thermal shutdown, output overvoltage (107–114% VOUT), short-circuit, and safe handling of inductor saturation. The device supports up to 100% duty cycle for low-dropout operation and tolerates VIN up to 6V absolute maximum.
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 regulation of sub-1V FPGA/ASIC cores and I/O supplies. |
| Output Accuracy | ±1% - ensures stable voltage margins for high-performance digital loads under line/load/temperature variation. |
| Switching Frequency | 2MHz (default), synchronizable 1–3MHz - allows use of <1µH inductors and compact ceramic output capacitors. |
| Min On-Time | 25ns - enables high step-down ratios (e.g., 5.5V→0.8V at 2MHz) without pulse skipping. |
| Shutdown Current | 1.2µA - minimizes battery drain in always-on systems requiring ultra-low quiescent power. |
| Thermal Rating | –40°C to +125°C junction - qualified for industrial and automotive under-hood environments. |
Pinout & Package
Package: 12-lead LQFN (2mm × 2mm × 0.74mm) with exposed thermal pad (Pin 13 = GND). Pinout optimized for dual-buck layout with separate SW1/SW2 nodes, dual EN/FB inputs, and shared MODE/SYNC and PGOOD signals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1, EN2 | Independent enable inputs | 400mV precision thresholds allow sequenced power-up via resistor dividers from upstream rails. |
| FB1, FB2 | Feedback inputs | Regulated to 500mV; support external resistive dividers for precise VOUT programming (e.g., 1.2V, 1.8V). |
| SW1, SW2 | Switch nodes | Connect to inductors; each has dedicated high-current paths (C3/C4 and C1/C2 pins) minimizing loop inductance. |
| VIN (Pins 7,10) | Input supply | Dual VIN pins reduce IR drop and improve high-frequency bypassing with local ceramic capacitors. |
| GND (Pins 8,9,13) | Ground terminals | Exposed pad (Pin 13) must be soldered to PCB ground plane for θJA = 51°C/W thermal performance. |
| MODE/SYNC | Mode control & sync input | Configures Burst/Pulse-Skipping/Forced Continuous mode; accepts 1–3MHz external clock for EMI reduction. |
| PGOOD | Open-drain status output | Asserts low if either regulated output falls below 97% or rises above 114% of target VOUT. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 2A synchronous bucks | Integrated 19mΩ NMOS and 75mΩ PMOS switches eliminate external MOSFETs and gate drivers. |
| 180° phase interleaving | Reduces input ripple current by ~70% vs. in-phase operation-cutting required input capacitance. |
| Burst Mode® operation | Delivers >85% efficiency at 1mA load while maintaining <10mVpp output ripple-ideal for standby power. |
| Internal soft-start | 1ms typical ramp time prevents inrush current and output overshoot during power-up sequencing. |
| AEC-Q100 Grade E | Qualified for automotive applications (-40°C to +125°C), including engine control and ADAS domain controllers. |
Applications
| FPGA Core Supply | Automotive ADAS Domain Controller |
|---|---|
Use Scenario: Powering Xilinx Zynq UltraScale+ MPSoC core rails (VCCINT @ 0.85V/2A) with tight voltage tolerance and fast load transients. IC Role / Device Role / Timing Role: Dual-output buck regulator providing independent, sequenced 0.85V and 1.8V supplies with PGOOD monitoring for system boot validation. Use Value: 25ns min-on-time enables direct 3.3V→0.85V conversion at 2MHz; 180° interleaving cuts input cap size by 50% vs. discrete solutions. | Use Scenario: Generating 1.2V/2A and 3.3V/2A rails for NVIDIA Orin-based vision processing units in camera ECU modules. IC Role / Device Role / Timing Role: AEC-Q100 qualified dual buck delivering fault-tolerant, thermally robust power with overvoltage/short-circuit protection. Use Value: –40°C to +125°C operation and 1.2µA shutdown current meet ISO 26262 ASIL-B requirements for always-on perception subsystems. |
| Optical Networking Line Card | Industrial PLC CPU Module |
Use Scenario: Regulating 1.2V/2A and 2.5V/2A for coherent DSP ASICs and SerDes interfaces in 400G QSFP-DD transceivers. IC Role / Device Role / Timing Role: High-frequency (2MHz) dual buck minimizing board area while meeting strict EMI limits via external clock synchronization. Use Value: 1–3MHz SYNC capability allows alignment to system master clock, reducing conducted noise peaks in dense line card layouts. | Use Scenario: Powering ARM Cortex-A53 multicore processors and DDR4 memory in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Dual POL regulator supporting dynamic voltage scaling (DVS) with independent EN control for processor sleep/wake states. Use Value: Precision 400mV enable thresholds enable reliable power sequencing across multiple voltage domains without external supervisors. |
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; lower max current (1.5A/buck); fixed 2.2MHz frequency; no external SYNC. | Targeted at Sitara AMx processors; lacks independent FB/EN per buck; no Burst Mode®. | Choose when integrating multiple rails beyond dual bucks is required and 1.5A/channel suffices. |
| ISL8026IRZ-T7A | Dual 3A bucks; 2.5MHz default; no Burst Mode®; higher quiescent current (25µA); no AEC-Q100 rating. | Higher current headroom but less efficient at light loads; limited to industrial temp range (–40°C to +85°C). | Choose when peak current >2A is needed and automotive qualification is not required. |
Compared with TPS6521845RSLR and ISL8026IRZ-T7A, the LTC3315AEV#TRMPBF offers superior light-load efficiency via Burst Mode®, AEC-Q100 qualification, and flexible mode selection-making it optimal for automotive and battery-sensitive POL designs where dual 2A rails and minimal footprint are critical.
Availability
LTC3315AEV#TRMPBF is available at Aetrix Electronics and suitable for FPGA core supplies, automotive ADAS domain controllers, and optical networking line cards requiring stable component supply with guaranteed long-term availability.
Supply support for LTC3315AEV#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 precision instrumentation, communications, and industrial markets.
The LTC3315A product line delivers highly integrated, thermally optimized dual buck regulators for space-constrained point-of-load applications demanding high efficiency, fast transient response, and automotive-grade reliability.
FAQ
What is the maximum input voltage rating for the LTC3315AEV#TRMPBF?
The LTC3315AEV#TRMPBF has an absolute maximum VIN rating of 6V. Operation is specified over 2.25V to 5.5V; exceeding 6V may cause permanent damage. This rating allows safe interface with 5V systems and transient-tolerant designs using TVS clamping.
Does the LTC3315AEV#TRMPBF support external synchronization of both buck channels?
Yes, the LTC3315AEV#TRMPBF supports external synchronization via the MODE/SYNC pin. Applying a 1–3MHz square wave locks both buck channels to the external clock, with Buck 2 operating 180° out of phase relative to Buck 1-ensuring deterministic timing and reduced EMI.
How does the LTC3315AEV#TRMPBF handle light-load efficiency?
The LTC3315AEV#TRMPBF achieves high light-load efficiency using Burst Mode® operation, which reduces quiescent current to 70µA (typical) with both bucks enabled. In this mode, the IC sleeps between output voltage correction bursts-maintaining regulation while minimizing power loss.
What thermal performance can be expected from the LTC3315AEV#TRMPBF in its LQFN package?
The LTC3315AEV#TRMPBF in the 2mm × 2mm LQFN package has θJA = 51°C/W when mounted on a standard 2-layer JEDEC test board. With proper PCB thermal design-including soldering the exposed pad to a solid ground plane-the device sustains 2A per channel continuously at +85°C ambient.
Can the LTC3315AEV#TRMPBF regulate outputs below 1V?
Yes, the LTC3315AEV#TRMPBF regulates outputs as low as 0.5V using external resistor dividers on FB1 and FB2. Its 500mV internal reference and ±1% output accuracy ensure stable sub-1V rails for advanced SoC cores, such as ARM Cortex-A78 or RISC-V processors requiring 0.75V–0.85V operation.
LTC3315AEV#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:
- 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#TRMPBF FAQ
1.How can I place an order for LTC3315AEV#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3315AEV#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 LTC3315AEV#TRMPBF reliable?
The price and inventory of LTC3315AEV#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3315AEV#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3315AEV#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3315AEV#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3315AEV#TRMPBF?
LTC3315AEV#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3315AEV#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 LTC3315AEV#TRMPBF?
For technical support, including LTC3315AEV#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3315AEV#TRMPBF requirements.
6.How does Aetrix verify that LTC3315AEV#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3315AEV#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 LTC3315AEV#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3315AEV#TRMPBF?
All LTC3315AEV#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3315AEV#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 LTC3315AEV#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3315AEV#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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