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Analog Devices Inc. LTC3415EUHF#TRPBF
- Part No.:
- LTC3415EUHF#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 38-WFQFN Exposed Pad
- Datasheet:
-
LTC3415EUHF#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 7A 38QFN
- Quantity:
- Payment:
- Shipping:
Inventory:358
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Product details
Overview
LTC3415EUHF#TRPBF from Analog Devices (formerly Linear Technology) is a monolithic, phase-lockable, current-mode synchronous step-down regulator delivering up to 7A output current. It operates from 2.5V to 5.5V input, supports PolyPhase® operation up to 12 phases, and features 1.5MHz nominal switching frequency with external synchronization from 0.75MHz to 2.25MHz - ideal for high-density point-of-load power in battery-powered instrumentation and distributed systems.
For engineers reviewing the LTC3415EUHF#TRPBF datasheet, LTC3415EUHF#TRPBF pinout, LTC3415EUHF#TRPBF application, or LTC3415EUHF#TRPBF equivalent, key selection criteria include its ±1% reference accuracy, 450μA quiescent current in Burst Mode®, 100% duty cycle low-dropout capability, differential ITH-based current sharing for multiphase stability, and 38-pin 5mm × 7mm QFN package with exposed PGND pad.
Technical Context
The LTC3415EUHF#TRPBF implements a constant-frequency, current-mode control architecture with internal P-channel and N-channel MOSFETs (RDS(ON) = 32mΩ / 25mΩ typ). Its phase-locked-loop (PLL) enables precise inter-device phase alignment via CLKIN/CLKOUT, while PHMODE pin selection configures 2-, 3-, or 4-phase offsets (180°, 120°, 90°) for scalable multiphase designs.
It supports three operating modes selected by the MODE pin: Burst Mode® (450μA IQ, high light-load efficiency), pulse-skipping (discontinuous conduction down to ~100ns min on-time), and forced continuous (fixed-frequency, lowest ripple). Output tracking, margining (±3% to ±17%), and spread-spectrum modulation are integrated for EMI reduction and system-level voltage coordination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 7A max at VIN = 3V; enables single-chip PoL for FPGA/core logic rails |
| Input Voltage Range | 2.5V to 5.5V; supports single Li-ion battery and 3.3V/5V intermediate bus |
| Switching Frequency | 1.5MHz nominal; allows compact 0.2μH inductors and reduces EMI fundamental |
| Reference Accuracy | ±1% over temp; ensures tight output regulation without external trimming |
| Quiescent Current | 450μA in Burst Mode®; extends runtime in always-on portable systems |
| Efficiency | Up to 96% at 1.8V/3A; minimizes thermal load in sealed enclosures |
| Package | 38-pin (5mm × 7mm) QFN with exposed PGND pad; enables high-power thermal dissipation |
Pinout & Package
38-pin plastic QFN package (5mm × 7mm), thermally enhanced with exposed PGND pad (Pin 39) requiring PCB solder connection. Pin pitch: 0.5mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN (4,5,27,28,35,36) | Power Input Supply | Direct connection to input capacitors; must be locally decoupled to PGND |
| SW (6,7,8,9,23,24,25,26) | Switch Node | Drives external inductor; swings between PVIN and PGND; multiple pins reduce parasitic inductance |
| PGND (13–19,39) | Power Ground | Return path for N-FET and input/output capacitors; exposed pad must be soldered |
| VFB (29) | Feedback Input | Compares output divider voltage to 0.596V internal reference; enables slave-mode disable in PolyPhase |
| ITH (32) | Error Amplifier Output | Controls peak inductor current threshold; tied to ITHM for differential current sharing in multiphase |
| CLKIN (11) | External Sync Input | Accepts 0.75–2.25MHz clock; forces internal oscillator phase lock for noise-sensitive systems |
| PHMODE (12) | Phase Offset Select | Sets CLKOUT phase shift (180°/120°/90°) for 2-/3-/4-phase cascading |
| RUN (37) | Enable Control | Active-high; >1.5V enables regulation; <1.3V disables with soft shutdown |
Key Features
| Feature | Design Value |
|---|---|
| PolyPhase® Operation | Supports up to 12 synchronized phases with automatic current sharing via differential ITH/ITHM interface |
| Spread Spectrum Modulation | Reduces peak EMI by modulating switching frequency when CLKIN tied to SVIN |
| Output Tracking & Margining | TRACK pin controls soft-start ramp; MGN/BSEL enable ±3% to ±17% programmable voltage margining |
| Burst Mode® Efficiency | Maintains >85% efficiency at 1mA load via intermittent switching and 450μA quiescent current |
| Low Dropout Operation | 100% duty cycle allows VOUT to track VIN down to ~2.5V - critical for battery end-of-life runtime |
Applications
| High-Density Point-of-Load Regulation | Battery-Powered Portable Instruments |
|---|---|
Use Scenario: Powering FPGA core voltage (1.0V–1.8V) in compact test equipment with strict thermal and board area constraints. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 7A with minimal external components and no external compensation required. Use Value: 96% peak efficiency and 1.5MHz switching reduce heatsink size and enable 2-layer PCB layout with 0.2μH inductors. | Use Scenario: Supplying DSP and ADC rails in handheld medical analyzers powered by single-cell Li-ion (2.8V–4.2V). IC Role / Device Role / Timing Role: Main system PMIC providing regulated 1.2V/1.8V/3.3V outputs with dynamic voltage scaling support. Use Value: 100% duty cycle operation extends usable battery life by 12+ minutes at end-of-discharge; Burst Mode® cuts standby current to 450μA. |
| Distributed Multiphase Power Systems | EMI-Sensitive Industrial Controllers |
Use Scenario: 14A total output for industrial PLC CPU using two LTC3415EUHF#TRPBF in 2-phase interleaved configuration. IC Role / Device Role / Timing Role: Master/slave synchronous buck pair with CLKOUT-to-CLKIN daisy-chain and PHMODE = HIGH for 180° phase offset. Use Value: Input RMS ripple current halved vs. single-phase; enables 50% smaller input capacitance and eliminates need for bulk electrolytics. | Use Scenario: Powering analog front-end and precision DACs in factory automation I/O modules where conducted EMI must meet CISPR-22 Class B. IC Role / Device Role / Timing Role: Synchronized buck converter locked to system clock (1.2MHz) with spread-spectrum enabled via CLKIN = SVIN. Use Value: Spread-spectrum modulation lowers 1.2MHz harmonic peaks by 15dB, easing EMC filter design and reducing ferrite bead count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z | 3A max output, 2MHz fixed frequency, no PolyPhase or spread spectrum; 8-pin SOIC | Lower current, simpler layout; lacks multiphase sync, tracking, or margining | Select only for cost-sensitive, low-current (<3A), single-rail applications without advanced control features |
| TPS546D24RSAR | 10A, 3.3V–16V input, PMBus interface, 4mm × 5mm QFN; requires external compensation | Higher voltage range, digital control, telemetry; no Burst Mode® or 100% duty cycle | Prefer for digitally managed systems needing telemetry and wide VIN; not suitable for Li-ion direct input or ultra-low-IQ operation |
Compared with MP2451DT-LF-Z and TPS546D24RSAR, the LTC3415EUHF#TRPBF uniquely combines 7A analog power delivery, true 100% duty cycle, integrated multiphase phase control, and sub-μA shutdown - making it optimal for space-constrained, battery-critical, and EMI-sensitive analog/digital hybrid systems.
Availability
LTC3415EUHF#TRPBF is available at Aetrix Electronics and suitable for high-density point-of-load regulation, battery-powered portable instrumentation, and distributed multiphase power systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LTC3415EUHF#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 acquired Linear Technology in 2017 and maintains full product support, documentation, and manufacturing continuity for all Linear power ICs.
The LTC3415EUHF#TRPBF belongs to Linear's high-performance monolithic DC/DC regulator family, designed specifically for demanding point-of-load, battery-operated, and multiphase power delivery applications where efficiency, thermal performance, and system-level timing control are critical.
FAQ
What is the maximum output current capability of the LTC3415EUHF#TRPBF?
The LTC3415EUHF#TRPBF delivers up to 7A output current when VIN = 3V and ambient temperature is ≤85°C. This rating assumes proper PCB layout with the exposed PGND pad fully soldered and adequate copper area for thermal dissipation. At higher input voltages (e.g., 5V), thermal limits may reduce practical current to ~6A due to increased power dissipation in internal MOSFETs.
Does the LTC3415EUHF#TRPBF support synchronization to an external clock source?
Yes, the LTC3415EUHF#TRPBF supports external synchronization via its CLKIN pin, accepting frequencies from 0.75MHz to 2.25MHz. When synchronized, the internal PLL locks both frequency and phase to the external signal, and the CLKOUT pin provides a phase-aligned output for cascading additional LTC3415EUHF#TRPBF devices in multiphase configurations.
How does the PHMODE pin affect operation of the LTC3415EUHF#TRPBF?
The PHMODE pin sets the phase offset between CLKIN and CLKOUT: HIGH selects 180° (2-phase), LOW selects 120° (3-phase), and SVIN/2 selects 90° (4-phase). This enables deterministic interleaving across multiple LTC3415EUHF#TRPBF units without external logic, directly supporting scalable 2-, 3-, 4-, 6-, or 12-phase power systems.
Can the LTC3415EUHF#TRPBF operate with 100% duty cycle, and why is that important?
Yes, the LTC3415EUHF#TRPBF supports 100% duty cycle operation, allowing VOUT to track VIN down to within ~200mV. This is essential for maximizing runtime in battery-powered systems - for example, sustaining a 1.8V rail down to a Li-ion cell voltage of 2.0V, extending usable discharge time by up to 15% compared to regulators with minimum dropout limitations.
What are the key differences between Burst Mode®, pulse-skipping, and forced continuous operation on the LTC3415EUHF#TRPBF?
The MODE pin selects operating mode: HIGH enables Burst Mode® (450μA IQ, intermittent switching), VIN/2 enables pulse-skipping (fixed-frequency below threshold, cycle skipping above), and LOW enables forced continuous (always-on PWM, lowest ripple). Each mode trades off light-load efficiency, output ripple, and EMI profile - Burst Mode® maximizes battery life, forced continuous minimizes noise-sensitive analog circuit interference.
LTC3415EUHF#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PolyPhase®
- Package/Case:
- 38-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.375V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 7A
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-QFN (5x7)
LTC3415EUHF#TRPBF FAQ
1.How can I place an order for LTC3415EUHF#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3415EUHF#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 LTC3415EUHF#TRPBF reliable?
The price and inventory of LTC3415EUHF#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3415EUHF#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3415EUHF#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3415EUHF#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3415EUHF#TRPBF?
LTC3415EUHF#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3415EUHF#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 LTC3415EUHF#TRPBF?
For technical support, including LTC3415EUHF#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3415EUHF#TRPBF requirements.
6.How does Aetrix verify that LTC3415EUHF#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3415EUHF#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 LTC3415EUHF#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3415EUHF#TRPBF?
All LTC3415EUHF#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3415EUHF#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 LTC3415EUHF#TRPBF part is unused and in its original packaging.
Return procedure for LTC3415EUHF#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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