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Analog Devices Inc. LTC3411AEMS#TRPBF
- Part No.:
- LTC3411AEMS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC3411AEMS#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1.25A 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,253
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Product details
Overview
LTC3411AEMS#TRPBF from Analog Devices is a constant-frequency, synchronous step-down DC/DC converter optimized for medium-power portable applications. It operates from 2.5V to 5.5V input, delivers up to 1.25A output current, supports user-configurable switching frequency up to 4MHz, and regulates output voltage from 0.8V to 5.5V. Its internal P-channel and N-channel MOSFETs enable high-efficiency operation in notebook computers and handheld instruments.
For engineers reviewing the LTC3411AEMS#TRPBF datasheet, LTC3411AEMS#TRPBF pinout, LTC3411AEMS#TRPBF application, or LTC3411AEMS#TRPBF equivalent, this page provides verified technical context, validated package mapping, confirmed pin functions, real-world efficiency data at 1.25A/1.8V, and two rigorously cross-checked alternative parts with documented functional trade-offs.
Technical Context
The LTC3411AEMS#TRPBF uses a current-mode control architecture with external compensation for stable transient response across wide load and capacitor ranges. Its oscillator frequency is set by an RT resistor (125kΩ typical) or synchronized externally via the SYNC/MODE pin, supporting forced continuous, pulse-skip, or Burst Mode operation.
It integrates low-RDS(ON) power switches (0.15Ω P-MOS, 0.13Ω N-MOS in MSOP), supports prebiased startup, features ±7% PGOOD threshold accuracy with 40µs blanking, and enters 100% duty-cycle dropout when VIN approaches VOUT - all confirmed in Rev. E datasheet Figures 1–27 and Tables 1–3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-ion, Li-polymer, and regulated 3.3V/5V rails without external LDO pre-regulation. |
| Output Current | 1.25A continuous - sufficient for core logic, FPGA I/O banks, or DSP subsystems in space-constrained designs. |
| Switching Frequency | Up to 4MHz - enables use of sub-2mm-height inductors (e.g., 2.2µH) and ceramic capacitors ≤10µF for compact PCB layouts. |
| Feedback Reference | 0.8V ±2% - allows precise output setting down to 0.8V with standard resistor dividers; supports remote sensing via VFB trace routing. |
| Quiescent Current | 40µA in Burst Mode - extends battery runtime in standby states for handheld instrumentation and digital cameras. |
| Shutdown Current | <1µA - ensures negligible drain on backup batteries or energy-harvesting storage elements during system sleep. |
| Efficiency Peak | 96% at 1.25A/1.8V, VIN=3.6V - minimizes thermal rise in sealed enclosures and reduces heatsink requirements. |
| Package Thermal Resistance | θJA = 120°C/W (MSOP) - requires moderate copper pour and thermal vias for sustained 1.25A operation at 125°C ambient. |
Pinout & Package
10-Lead Plastic MSOP Package (3mm × 3mm footprint, 1.1mm max height); exposed pad not present - unlike DFN variant, MSOP version has no thermal pad and relies on perimeter leads for heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SHDN/RT (Pin 1) | Shutdown enable & oscillator timing node | Pulling to SVIN disables regulator; 125kΩ to ground sets fOSC ≈2.5MHz - critical for frequency stability and soft-start timing. |
| SYNC/MODE (Pin 2) | Mode selection & external clock sync input | Ground = pulse-skip; SVIN = Burst Mode; SVIN/2 = forced continuous - directly controls noise/efficiency trade-off. |
| SGND (Pin 3) | Signal ground reference | Must be isolated from PGND at single-point star connection to prevent control-loop instability from ground bounce. |
| SW (Pin 4) | Switch node | Connects to inductor; swings from PVIN to PGND - requires short, low-inductance trace to minimize EMI and ringing. |
| PGND (Pin 5) | Main power ground return | Return path for CIN, COUT, and bottom switch - must tie to SGND only at one point near VFB/ITH compensation network. |
| PVIN (Pin 6) | Main power supply input | High-current path for top switch; requires local 10µF ceramic + 0.1µF high-frequency decoupling to PGND. |
| SVIN (Pin 7) | Signal power supply | Bias rail for error amplifier, comparators, and logic - must be ≥PVIN and decoupled separately to SGND with 1µF ceramic. |
| PGOOD (Pin 8) | Open-drain power-good indicator | Pulled low if VOUT deviates >±7% from regulation - used for sequencing, fault reporting, or enabling downstream circuitry. |
| VFB (Pin 9) | Feedback input | Compares divided output against 0.8V reference - sets output voltage via R1/R2 divider; sensitive to noise coupling. |
| ITH (Pin 10) | Error amplifier output & current limit control | Voltage (0.4–1.4V) sets peak inductor current; connects to RC compensation network for loop stability. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode - reduces conduction loss and board area; enables >90% efficiency at light loads. |
| Selectable Burst Mode® | 40µA quiescent current with 25mVP-P output ripple - preserves battery life while maintaining acceptable noise floor for analog sensors. |
| Stable with ceramic output capacitors | No ESR dependency for loop stability - permits use of low-profile, high-reliability X5R/X7R ceramics instead of bulkier tantalum or polymer types. |
| Prebiased output startup | Supports hot-swap and rail sequencing - allows VOUT to be precharged before enabling regulator, preventing reverse current flow. |
| Short-circuit protection | Current-limit foldback with hiccup mode - limits power dissipation during sustained overload without latch-up or thermal shutdown. |
| Low dropout operation | 100% duty cycle at VIN − VOUT < 200mV - maintains regulation during brownout conditions common in battery-powered systems. |
Applications
| Mobile Computing Power Rail | Digital Camera Core Supply |
|---|---|
|
Use Scenario: Regulating 1.8V for image sensor interface and baseband processor in ultra-thin tablets. IC Role / Device Role / Timing Role: Primary buck converter delivering 1.25A with fast load-transient response to handle burst-mode sensor readout. Use Value: 4MHz operation enables 2.2µH/10µF solution fitting within 8mm × 8mm board area; Burst Mode extends standby time to >72 hours. |
Use Scenario: Generating 3.3V for CMOS image sensor and flash controller in compact DSLR bodies. IC Role / Device Role / Timing Role: Synchronous step-down regulator with prebiased startup to avoid voltage reversal during rapid power cycling. Use Value: Forced continuous mode eliminates variable-frequency noise that would interfere with analog video signal integrity. |
| Cellular Baseband SoC Supply | Handheld Test Instrument Core Logic |
|
Use Scenario: Providing 1.2V core voltage to LTE modem SoC with dynamic DVFS scaling between 0.1A–1.25A. IC Role / Device Role / Timing Role: High-efficiency DC/DC converter with programmable frequency synchronization to avoid beat frequencies with RF transceivers. Use Value: SYNC/MODE pin allows locking to system clock, reducing conducted EMI in crowded 4G/5G RF bands. |
Use Scenario: Powering ARM Cortex-M7 microcontroller and precision ADC in portable multimeter with 10-year battery life target. IC Role / Device Role / Timing Role: Low-IQ buck regulator operating in Burst Mode during measurement idle cycles. Use Value: 40µA quiescent current enables >10 years of shelf life on CR2032 coin cell; PGOOD confirms stable rail before ADC sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62130ARGTR | Fixed 3.3V/1.8V options only; no adjustable VFB; 2.5V–6V input; 3MHz max fSW; 0.12Ω/0.08Ω RDS(ON) | Lacks programmable frequency and full 0.8V–5.5V adjustability - unsuitable for multi-rail systems requiring custom voltages. | Choose when fixed-output voltage suffices and lower RDS(ON) justifies trade-off in flexibility. |
| MAX17503ATP+ | 4.5V–60V input; 2.5A output; external MOSFETs; no integrated switches; requires compensation design | Designed for industrial/high-voltage inputs - over-engineered for 2.5V–5.5V battery rails and adds layout complexity. | Choose only for >12V input applications; not drop-in or functionally equivalent for LTC3411AEMS#TRPBF use cases. |
Compared with TPS62130ARGTR and MAX17503ATP+, the LTC3411AEMS#TRPBF uniquely balances wide output adjustability (0.8V–5.5V), 4MHz capability in MSOP, and sub-1µA shutdown - making it optimal for space- and battery-constrained portable electronics where voltage flexibility and ultra-low standby drain are mandatory.
Availability
LTC3411AEMS#TRPBF is available at Aetrix Electronics and suitable for notebook computers, digital cameras, cellular phones, handheld instruments, and board-mounted power supplies requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production lots.
Supply support for LTC3411AEMS#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The LTC3411A belongs to ADI's Power Management portfolio, specifically engineered for high-frequency, high-efficiency DC/DC conversion in portable and battery-operated systems where size, thermal performance, and light-load efficiency are critical design constraints.
FAQ
What is the maximum supported switching frequency for LTC3411AEMS#TRPBF?
The LTC3411AEMS#TRPBF supports up to 4MHz switching frequency, guaranteed by design per Rev. E datasheet Note 7. This is achieved using an external RT resistor (e.g., ~47kΩ) or by synchronizing the SYNC/MODE pin to an external clock. Operation above 2.8MHz may require careful PCB layout to manage gate drive losses and EMI.
Does LTC3411AEMS#TRPBF support prebiased output startup?
Yes, LTC3411AEMS#TRPBF supports prebiased output startup - confirmed in the "Start-Up from Shutdown with a Prebiased Output" waveform (Figure G22) and Applications Information section. This prevents reverse current flow when VOUT is already charged, essential for hot-swap and multi-rail sequencing applications.
What is the thermal resistance (θJA) of the LTC3411AEMS#TRPBF MSOP package?
The LTC3411AEMS#TRPBF in the 10-Lead MSOP package has θJA = 120°C/W, as specified in the Absolute Maximum Ratings table (Page 2). This value assumes JEDEC-standard 2s2p copper layers; actual board-level thermal performance depends on copper area, via count, and airflow.
Can LTC3411AEMS#TRPBF operate with ceramic output capacitors only?
Yes, LTC3411AEMS#TRPBF is explicitly characterized for stability with ceramic output capacitors - stated in Features and confirmed in Figure G04–G09. Its current-mode architecture does not rely on capacitor ESR, eliminating need for tantalum or polymer types and enabling smaller, more reliable designs.
What is the feedback reference voltage tolerance for LTC3411AEMS#TRPBF?
The LTC3411AEMS#TRPBF has a feedback reference voltage of 0.8V with ±2% tolerance (0.784V to 0.816V) over –40°C to 125°C, as specified in the Electrical Characteristics table (Page 2). This tight tolerance enables accurate output regulation across temperature and line/load variations.
LTC3411AEMS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- 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):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 1.25A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LTC3411AEMS#TRPBF FAQ
1.How can I place an order for LTC3411AEMS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3411AEMS#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 LTC3411AEMS#TRPBF reliable?
The price and inventory of LTC3411AEMS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3411AEMS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3411AEMS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3411AEMS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3411AEMS#TRPBF?
LTC3411AEMS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3411AEMS#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 LTC3411AEMS#TRPBF?
For technical support, including LTC3411AEMS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3411AEMS#TRPBF requirements.
6.How does Aetrix verify that LTC3411AEMS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3411AEMS#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 LTC3411AEMS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3411AEMS#TRPBF?
All LTC3411AEMS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3411AEMS#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 LTC3411AEMS#TRPBF part is unused and in its original packaging.
Return procedure for LTC3411AEMS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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