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Analog Devices Inc. LTC3412EFE#TRPBF
- Part No.:
- LTC3412EFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3412EFE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 2.5A 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,917
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Product details
Overview
LTC3412EFE#TRPBF from Analog Devices (formerly Linear Technology) is a monolithic synchronous step-down DC/DC regulator delivering up to 2.5A at adjustable output voltages from 0.8V to 5V, operating from 2.625V–5.5V input. It features 85mΩ P-channel and 65mΩ N-channel internal MOSFETs, programmable 300kHz–4MHz switching frequency, and OPTI-LOOP® compensation-used in notebook computers and battery-powered instrumentation for high-efficiency power conversion.
For engineers reviewing the LTC3412EFE#TRPBF datasheet, LTC3412EFE#TRPBF pinout, LTC3412EFE#TRPBF application, or LTC3412EFE#TRPBF equivalent, key selection considerations include its 16-lead TSSOP thermally enhanced package, selectable Burst Mode®/forced continuous operation, ±2% output voltage accuracy, 62µA quiescent current in sleep mode, and 100% duty cycle low-dropout capability.
Technical Context
The LTC3412EFE#TRPBF employs constant-frequency current-mode control with internal slope compensation to prevent subharmonic oscillation above 40% duty cycle. Its dual-MOSFET architecture uses an 85mΩ P-channel high-side switch and 65mΩ N-channel synchronous rectifier, enabling up to 95% efficiency and eliminating external diode requirements.
Operation supports three modes via SYNC/MODE pin: forced continuous (SYNC tied to SVIN), Burst Mode® (0V–1V clamp voltage), or external clock synchronization (300kHz–4MHz). The ITH pin serves as error amplifier output and peak current threshold control point, while OPTI-LOOP® allows transient response optimization across load and capacitor variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.625V to 5.5V - supports single-cell Li-ion and 3.3V/5V rail inputs without pre-regulation |
| Output Current | Up to 2.5A - sufficient for core logic rails in portable computing and imaging systems |
| Switching Frequency | 300kHz to 4MHz - enables compact 1µH inductors and ceramic capacitors in space-constrained designs |
| Quiescent Current | 62µA in Burst Mode sleep - extends battery runtime in always-on subsystems |
| Output Voltage Accuracy | ±2% over line/load/temperature - ensures stable core voltage for sensitive digital loads |
| RDS(ON) (P-FET/N-FET) | 85mΩ / 65mΩ - minimizes conduction loss and thermal rise at full load |
| Feedback Reference | 0.800V ±1.6% - allows precise low-voltage regulation down to 0.8V with standard resistor dividers |
| Power Good Threshold | ±7.5% of VOUT - provides reliable system-level power sequencing and fault detection |
Pinout & Package
Package: 16-lead thermally enhanced TSSOP (FE package) with exposed pad (Pin 17) soldered to SGND for electrical integrity and thermal performance (θJA = 37.6°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SVIN (1,11) | Signal Input Supply | Decoupled supply for control circuitry; must track PVIN within 0.5V to avoid latch-up |
| PGOOD (2,12) | Open-Drain Power Good Monitor | Asserts low when VOUT deviates >±7.5%; used for system enable/disable sequencing |
| ITH (3,13) | Error Amplifier Output / Current Limit Control | Voltage sets peak inductor current threshold (0.2V–1.4V range); critical for loop stability and current limiting |
| VFB (4,14) | Feedback Input | Compares resistive divider output against 0.8V reference to regulate VOUT |
| RT (5,15) | Oscillator Timing Resistor Input | Resistor-to-ground sets switching frequency (ROSC = 3.23×10¹¹/f − 10kΩ) |
| SYNC/MODE (6,16) | Mode Selection & Clock Sync Input | 0V–1V = Burst Mode clamp level; SVIN = forced continuous; external clock = sync mode |
| RUN/SS (7,1) | Enable & Soft-Start Control | <0.5V = shutdown (<1µA IQ); capacitor to ground controls output ramp time |
| SGND (8,2) | Signal Ground Reference | Reference for all analog circuitry and compensation components; connects to PGND at single point |
| PVIN (9,16; 3,10) | Power Input Supply | High-current input path; requires local low-ESR capacitor to PGND |
| SW (10,11,14,15; 4,5,8,9) | Switch Node | Connects to inductor; carries high di/dt; must be routed short and wide to minimize EMI |
| PGND (12,13; 6,7) | Power Ground Return | Return path for high-current switching loops; ties to CIN/COUT negative terminals |
| Exposed Pad (17) | Thermal & Electrical Ground | Mandatory solder connection to SGND plane for thermal dissipation and noise reduction |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Synchronous Power Switches | Eliminates external Schottky diode, reduces BOM count, and improves efficiency by ~3–5% vs asynchronous designs |
| OPTI-LOOP® Compensation | Enables stable loop response across wide output capacitor ESR ranges (1mΩ–100mΩ) and load currents (1mA–2.5A) |
| Selectably Adjustable Burst Clamp | External voltage on SYNC/MODE pin directly programs minimum inductor peak current (0–3.75A), allowing ripple/noise trade-off tuning |
| 100% Duty Cycle Low-Dropout Operation | Maintains regulation down to VIN ≈ VOUT + ILOAD × RDS(ON), extending usable battery voltage range in portable systems |
| Overtemperature Protection | Thermal shutdown at TJ = 125°C with automatic recovery, preventing permanent damage during sustained overload or poor heatsinking |
| Power Good Output with ±7.5% Threshold | Provides deterministic system-level power sequencing signal without external comparators or voltage monitors |
Applications
| Portable Instruments | Notebook Computers |
|---|---|
Use Scenario: Handheld multimeters and portable oscilloscopes requiring clean, efficient 1.8V/3.3V rails from single Li-ion cells. IC Role / Device Role / Timing Role: Primary buck regulator supplying FPGA I/O banks and ADC/DAC analog supplies. Use Value: 62µA quiescent current in Burst Mode extends battery life between measurements; 0.8V reference enables precise low-voltage calibration rails. | Use Scenario: Core voltage regulation for Intel Atom or ARM-based sub-notebooks with dynamic load profiles. IC Role / Device Role / Timing Role: System PMIC secondary regulator delivering 1.05V/1.2V CPU core power with fast transient response. Use Value: OPTI-LOOP® compensation maintains stability with low-ESR polymer capacitors; forced continuous mode suppresses switching noise near audio codecs. |
| Battery-Powered Equipment | Distributed Power Systems |
Use Scenario: Wireless sensor nodes powered by coin-cell or rechargeable LiPo batteries needing ultra-low IQ operation. IC Role / Device Role / Timing Role: Main power converter stepping 3.6V battery to 2.5V MCU supply with deep-sleep wake-up capability. Use Value: 100% duty cycle operation sustains regulation until battery reaches 2.7V; shutdown current <1µA preserves charge during multi-week idle periods. | Use Scenario: Point-of-load regulation in industrial PLC backplanes where multiple 5V/3.3V rails feed isolated communication modules. IC Role / Device Role / Timing Role: Local DC/DC converter replacing linear regulators to reduce heat and improve system efficiency. Use Value: 4MHz max switching frequency allows use of 0805-size 1µH inductors, saving PCB area; SYNC input enables coherent switching across multiple LTC3412 units to reduce EMI peaks. |
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 |
|---|---|---|---|
| TPS54227PWPR | Lower max output current (2A vs 2.5A); fixed 500kHz/1MHz options only; no Burst Mode clamp adjustment | Suitable for cost-sensitive consumer electronics where 2A suffices and fixed frequency is acceptable | Choose if footprint compatibility with TI's 16-pin HTSSOP is required and adjustable burst clamp is not needed |
| MP2315GJ-Z | Higher quiescent current (350µA active vs 62µA); no PGOOD output; 3.5A current limit but lower RDS(ON) (45mΩ/30mΩ) | Better for high-current, low-cost industrial modules where PGOOD and ultra-low IQ are secondary | Prefer when thermal budget is tight and higher efficiency at 2A+ loads outweighs lack of power-good signaling |
Compared with TPS54227PWPR and MP2315GJ-Z, the LTC3412EFE#TRPBF offers uniquely adjustable Burst Mode clamp voltage, ±2% output accuracy over temperature, and integrated OPTI-LOOP® compensation-making it optimal for precision battery-powered systems demanding both efficiency and regulation fidelity.
Availability
LTC3412EFE#TRPBF is available at Aetrix Electronics and suitable for notebook computers, portable instruments, and battery-powered equipment requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across –40°C to 125°C.
Supply support for LTC3412EFE#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.
The LTC3412EFE#TRPBF belongs to ADI's Power by Linear™ family of high-efficiency DC/DC converters, designed specifically for space-constrained, battery-sensitive applications requiring low IQ, high accuracy, and robust transient response.
FAQ
What is the maximum output current capability of the LTC3412EFE#TRPBF?
The LTC3412EFE#TRPBF delivers up to 2.5A of continuous output current under typical conditions (TA = 25°C, 2-layer PCB, proper thermal layout). Derating applies at elevated ambient temperatures or with inadequate copper pour on the exposed pad; full 2.5A is maintained up to 85°C ambient with recommended PCB layout per the datasheet.
Does the LTC3412EFE#TRPBF require an external Schottky diode?
No, the LTC3412EFE#TRPBF does not require an external Schottky diode. It integrates both a P-channel high-side switch (85mΩ) and N-channel synchronous rectifier (65mΩ), enabling fully synchronous operation that eliminates conduction losses and thermal issues associated with external diodes.
How is the switching frequency set on the LTC3412EFE#TRPBF?
The switching frequency of the LTC3412EFE#TRPBF is set using an external resistor connected from the RT pin to ground. The relationship is ROSC = (3.23 × 10¹¹ / f) − 10kΩ, supporting 300kHz to 4MHz. Alternatively, the SYNC/MODE pin accepts an external clock signal in the same frequency range for synchronized operation.
What is the purpose of the ITH pin on the LTC3412EFE#TRPBF?
On the LTC3412EFE#TRPBF, the ITH pin serves as the error amplifier output and peak inductor current threshold control node. Its voltage (0.2V–1.4V) directly sets the current comparator trip point. It also functions as the compensation point for OPTI-LOOP® and is used by the burst comparator to detect sleep mode entry/exit in Burst Mode operation.
Can the LTC3412EFE#TRPBF operate with input voltage below 2.625V?
No, the LTC3412EFE#TRPBF has a specified minimum input voltage of 2.625V. Operation below this violates Absolute Maximum Ratings and may cause improper startup, regulation failure, or undefined behavior. The undervoltage lockout (UVLO) threshold is 2.500V typical, with hysteresis ensuring clean turn-on above 2.625V.
LTC3412EFE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) 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):
- 2.625V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 2.5A
- Frequency - Switching:
- 300kHz ~ 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP-EP
LTC3412EFE#TRPBF FAQ
1.How can I place an order for LTC3412EFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3412EFE#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 LTC3412EFE#TRPBF reliable?
The price and inventory of LTC3412EFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3412EFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3412EFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3412EFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3412EFE#TRPBF?
LTC3412EFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3412EFE#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 LTC3412EFE#TRPBF?
For technical support, including LTC3412EFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3412EFE#TRPBF requirements.
6.How does Aetrix verify that LTC3412EFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3412EFE#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 LTC3412EFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3412EFE#TRPBF?
All LTC3412EFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3412EFE#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 LTC3412EFE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3412EFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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