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Analog Devices Inc. LTC3315BHV#TRPBF
- Part No.:
- LTC3315BHV#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-VFQFN Exposed Pad
- Datasheet:
-
LTC3315BHV#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 2A/2A DL 12LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,395
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Product details
Overview
LTC3315BHV#TRPBF from Analog Devices is a dual-channel monolithic synchronous step-down DC/DC converter IC, integrating two 2A buck regulators in a single 2mm × 2mm LQFN package. It operates from 2.25V to 5.5V input, delivers regulated outputs as low as 0.5V with ±1% accuracy, and supports 6MHz fixed-frequency or externally synchronized operation up to 10MHz - ideal for space-constrained FPGA core supplies and automotive POL applications.
For engineers reviewing the LTC3315BHV#TRPBF datasheet, LTC3315BHV#TRPBF pinout, LTC3315BHV#TRPBF application, or LTC3315BHV#TRPBF equivalent, key selection criteria include its 25ns minimum on-time, 19mΩ/75mΩ NMOS/PMOS RDS(ON), AEC-Q100 qualification (–40°C to 150°C), dual-phase 180° interleaving, and Burst Mode® operation enabling <1.2µA shutdown current.
Technical Context
The LTC3315BHV#TRPBF implements peak current mode control with internal compensation and dual independent feedback loops (FB1/FB2), each regulating to a precise 500mV reference. Its 180° phase-shifted switching reduces input ripple and eases EMI filtering while maintaining fast transient response via 25ns minimum on-time and adaptive slope compensation during external synchronization.
It integrates dual high-side PMOS (75mΩ) and low-side NMOS (19mΩ) power switches per channel, supports forced continuous, pulse-skip, and Burst Mode® operation via MODE/SYNC pin configuration, and features comprehensive protection including output overvoltage detection (107–114% VOUT threshold), thermal shutdown at 165°C, and short-circuit robustness with valley current limiting (2.4–3.0A).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - enables direct regulation from single-cell Li-ion or 3.3V/5V rails without pre-regulation. |
| VOUT Range | 0.5V to VIN - supports sub-1V FPGA/ASIC core supplies and adjustable POL outputs. |
| Output Accuracy | ±1% over temperature - ensures stable voltage margins for sensitive digital loads. |
| Switching Frequency | 6MHz default, synchronizable 3–10MHz - allows compact 240–330nH inductors and tight transient response. |
| Min On-Time | 25ns - enables high step-down ratios (e.g., 5.5V→0.5V at 6MHz) without pulse skipping. |
| RDS(ON) | 19mΩ NMOS / 75mΩ PMOS - minimizes conduction loss and thermal rise at 2A per channel. |
| Shutdown Current | 1.2µA - preserves battery life in always-on automotive or IoT systems. |
| Junction Temp Range | –40°C to 150°C - qualified per AEC-Q100 Grade H for under-hood automotive use. |
Pinout & Package
Package: 12-lead 2mm × 2mm × 0.74mm LQFN with exposed thermal pad (Pin 13 = GND). Thermally enhanced design achieves θJA = 51°C/W and θJB = 12°C/W when soldered to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1, EN2 (Pins 1, 4) | Independent enable inputs | 400mV precision thresholds support sequenced startup; drive to VIN for simple enable or use resistor dividers for voltage-triggered activation. |
| FB1, FB2 (Pins 2, 3) | Feedback inputs | Regulate to 500mV reference; set VOUT = 0.5V × (1 + RTOP/RBOT) - enables accurate multi-rail POL designs. |
| SW1, SW2 (Pins 11, 6) | Switch node outputs | Connect directly to inductor; require short, wide traces to minimize ringing and EMI in high-dI/dt 6MHz operation. |
| VIN (Pins 7, 10) | Input supply pins | Dual VIN pins reduce IR drop and improve current sharing; must be bypassed locally with low-ESR capacitors. |
| GND (Pins 8, 9, 13) | Ground terminals | Exposed pad (Pin 13) is primary thermal path - must be soldered to solid PCB ground plane for rated θJB. |
| PGOOD (Pin 5) | Open-drain power-good output | Asserts high only when both enabled outputs are within 97–99% of target; 120µs fault filtering prevents false triggers during transients. |
| MODE/SYNC (Pin 12) | Mode control & sync input | Configures operating mode (low = pulse-skip, high = Burst Mode®, float = forced continuous); accepts 3–10MHz external clock for system-wide timing alignment. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 2A synchronous bucks in 2mm × 2mm | Reduces board area by >40% vs. discrete dual-buck solutions; eliminates external gate drivers and loop compensation components. |
| 180° interleaved switching | Cuts input RMS current by ~30%, easing input capacitor sizing and reducing EMI filter requirements. |
| Burst Mode® with <1.2µA shutdown | Extends battery runtime in standby; maintains ultra-low noise during light-load operation without sacrificing regulation accuracy. |
| Internal soft-start (0.25–3ms) | Prevents inrush current and output overshoot during power-up; restarts automatically after UVLO or thermal fault recovery. |
| Output overvoltage protection (107–114% VOUT) | Shuts off PMOS immediately upon FB overvoltage detection - safeguards downstream logic and memory from destructive overvoltage events. |
| AEC-Q100 Grade H qualification | Validated for automotive under-hood environments (–40°C to 150°C junction), including HTOL, TC, and ESD testing per stress requirements. |
Applications
| FPGA Core Supply | Automotive ADAS Processor |
|---|---|
|
Use Scenario: Powering Xilinx Zynq UltraScale+ MPSoC core rails (VCCINT @ 0.85V, VCCAUX @ 1.8V) from 3.3V intermediate bus. IC Role / Device Role / Timing Role: Dual-channel POL regulator delivering tightly regulated, low-noise, phase-interleaved 2A outputs with synchronized 6MHz switching. Use Value: Meets FPGA dynamic current slew rate demands (<5A/µs) while minimizing output capacitance and board area via 25ns min-on-time and integrated FETs. |
Use Scenario: Supplying NVIDIA DRIVE Orin SoC CPU/GPU cores (VDD_CPU @ 0.75V, VDD_GPU @ 0.8V) in radar/ECS modules. IC Role / Device Role / Timing Role: AEC-Q100 qualified dual buck providing fault-tolerant, thermally robust power with PGOOD monitoring and overvoltage protection. Use Value: Enables single-package solution meeting ASIL-B functional safety requirements through independent enable/control and redundant PGOOD reporting. |
| Optical Transceiver Module | Industrial PLC I/O Controller |
|
Use Scenario: Generating 1.2V and 2.5V bias rails for 400G QSFP-DD transceivers operating in compact pluggable form factors. IC Role / Device Role / Timing Role: High-frequency (6MHz) dual regulator minimizing inductor size and enabling dense layout in thermally constrained optical cages. Use Value: Achieves >90% efficiency at 1.5A load with 330nH inductors, reducing thermal footprint and enabling passive cooling in sealed modules. |
Use Scenario: Powering ARM Cortex-M7 microcontroller, isolated CAN transceivers, and analog sensor front-ends in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Dual-output POL IC supporting flexible rail sequencing (EN1/EN2 controlled) and brownout-safe operation down to 2.25V input. Use Value: Eliminates need for external supervisors and sequencers; 1.2µA shutdown current extends backup battery life during mains failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP24894D-LF-Z | Single 4A buck (not dual); 2.5–18V input; no Burst Mode®; 1.2MHz max fSW; no AEC-Q100 rating | Suitable for higher-input industrial rails but lacks dual independent outputs, automotive qualification, and high-frequency capability | Select only if input >5.5V required and dual-rail independence is not needed. |
| TPS6521845RSLR | Power management IC with dual 3A bucks + LDOs; 2.7–5.5V input; 2.2MHz fSW; no 25ns min-on-time; not AEC-Q100 qualified | Integrates system power sequencing and battery charging - broader feature set but larger 4mm × 4mm QFN and lower switching frequency | Choose when full PMIC functionality (LDOs, charger, RTC) is required alongside dual bucks. |
Compared with MP24894D-LF-Z and TPS6521845RSLR, the LTC3315BHV#TRPBF uniquely combines dual 2A channels, 6MHz operation, 25ns min-on-time, AEC-Q100 Grade H qualification, and 2mm × 2mm footprint - making it optimal for compact, high-performance automotive and FPGA POL applications where size, speed, and reliability are critical.
Availability
LTC3315BHV#TRPBF is available at Aetrix Electronics and suitable for automotive ADAS modules, FPGA-based test equipment, and industrial PLCs requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LTC3315BHV#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 with precision power, signal chain, and RF solutions.
The LTC3315BHV#TRPBF belongs to Analog Devices' Power by Linear™ family of high-efficiency, high-density DC/DC converters designed specifically for space- and performance-critical applications in automotive, computing, and optical networking.
FAQ
What is the maximum junction temperature rating for the LTC3315BHV#TRPBF?
The LTC3315BHV#TRPBF is rated for operation up to 150°C junction temperature and is AEC-Q100 qualified for Grade H automotive applications. Overtemperature protection activates at 165°C (typical) with 5°C hysteresis, shutting down both buck regulators until die temperature falls to 160°C.
Does the LTC3315BHV#TRPBF support independent enable and feedback for each buck channel?
Yes, the LTC3315BHV#TRPBF provides fully independent control: EN1/FB1 for Buck 1 and EN2/FB2 for Buck 2. Each enable pin has a precision 400mV threshold, and each feedback pin regulates to 500mV - enabling flexible rail sequencing and different output voltages (e.g., 0.85V and 1.8V) from a single IC.
How does the MODE/SYNC pin configure operating modes on the LTC3315BHV#TRPBF?
The MODE/SYNC pin selects three modes: grounded = pulse-skip mode; tied to VIN = Burst Mode® for highest light-load efficiency; floating = forced continuous mode for lowest output ripple. When driven by an external 3–10MHz clock, it synchronizes both bucks in forced continuous mode with 180° phase shift.
What protection features are integrated into the LTC3315BHV#TRPBF?
The LTC3315BHV#TRPBF includes output overvoltage protection (107–114% VOUT), thermal shutdown (165°C), short-circuit protection with valley current limiting (2.4–3.0A), undervoltage lockout (2.05–2.25V), and PGOOD fault reporting with 120µs filtering - all implemented without external components.
Can the LTC3315BHV#TRPBF operate with input voltage as low as 2.25V while delivering 2A per channel?
Yes, the LTC3315BHV#TRPBF is specified to deliver full 2A per channel across its entire 2.25V to 5.5V input range. At 2.25V input, it supports outputs down to 0.5V using its 100% duty cycle capability and low RDS(ON) (19mΩ NMOS / 75mΩ PMOS) to maintain efficiency and thermal performance.
LTC3315BHV#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:
- 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)
LTC3315BHV#TRPBF FAQ
1.How can I place an order for LTC3315BHV#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3315BHV#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 LTC3315BHV#TRPBF reliable?
The price and inventory of LTC3315BHV#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3315BHV#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3315BHV#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3315BHV#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3315BHV#TRPBF?
LTC3315BHV#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3315BHV#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 LTC3315BHV#TRPBF?
For technical support, including LTC3315BHV#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3315BHV#TRPBF requirements.
6.How does Aetrix verify that LTC3315BHV#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3315BHV#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 LTC3315BHV#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3315BHV#TRPBF?
All LTC3315BHV#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3315BHV#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 LTC3315BHV#TRPBF part is unused and in its original packaging.
Return procedure for LTC3315BHV#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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