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Analog Devices Inc. LTC3414EFE#PBF
- Part No.:
- LTC3414EFE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3414EFE#PBF.pdf
- Description:
- IC REG BUCK ADJ 4A 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:682
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Product details
Overview
LTC3414EFE#PBF from Analog Devices is a monolithic synchronous step-down DC/DC regulator delivering up to 4A output current at 0.8V–5V with ±2% output voltage accuracy, 67mΩ P-channel and 50mΩ N-channel internal MOSFETs, and programmable switching frequency from 300kHz to 4MHz. It enables point-of-load regulation in notebook computers and portable instruments.
For engineers reviewing the LTC3414EFE#PBF datasheet, LTC3414EFE#PBF pinout, LTC3414EFE#PBF application, or LTC3414EFE#PBF equivalent, key selection criteria include input voltage range (2.25V–5.5V), burst mode vs forced continuous operation control, OPTI-LOOP® compensation for transient optimization, power good monitoring, and thermal protection in the exposed 20-lead TSSOP package.
Technical Context
The LTC3414EFE#PBF employs constant-frequency current-mode control with internal P-channel and N-channel synchronous power switches. Its peak current limit is set by the ITH pin voltage, while error amplifier feedback via VFB compares against a 0.8V reference to regulate output voltage across 0.8V–5V.
It supports three operating modes via SYNC/MODE pin: forced continuous (tied to SVIN), burst mode (0V–1V clamp voltage), or pulse-skipping (grounded). Frequency is resistor-programmed on RT or synchronized externally from 300kHz to 4MHz, with slope compensation recovery maintaining stable peak inductor current across duty cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.25V to 5.5V - supports single-cell Li-ion, USB, and low-voltage distributed rails without pre-regulation. |
| Output Current | Up to 4A - sufficient for core logic, FPGAs, or SoCs in portable systems with minimal external components. |
| Switching Frequency | 300kHz to 4MHz - adjustable via RT resistor or external sync clock; higher frequencies reduce inductor/capacitor size. |
| RDS(ON) (P-FET / N-FET) | 67mΩ / 50mΩ - minimizes conduction loss and eliminates need for external Schottky diode. |
| Quiescent Current | 64µA in Burst Mode - extends battery life in standby or light-load conditions typical of portable instruments. |
| Output Voltage Accuracy | ±2% over temperature and line - ensures reliable regulation for sensitive analog or digital loads. |
| Power Good Output | Open-drain PGOOD with ±7.5% threshold - provides system-level fault detection and sequencing control. |
Pinout & Package
Package: 20-lead Exposed Pad TSSOP (FE), with exposed pad (Pin 21) required to be soldered to PCB for thermal and electrical performance. θJA = 38°C/W, θJC = 10°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pins 1,10,11,20) | Power Ground | Low-impedance return path for high-current switch node; must connect directly to CIN/COUT (–) terminals. |
| RT (Pin 2) | Oscillator Timing Input | Resistor-to-ground sets switching frequency; ROSC = 3.08×10¹¹/f – 10kΩ. |
| SYNC/MODE (Pin 3) | Mode Control & Sync Input | Selects Burst Mode (0–1V), Forced Continuous (tied to SVIN), or Pulse-Skipping (grounded); also accepts external sync clock. |
| RUN/SS (Pin 4) | Enable & Soft-Start | Shuts down device below 0.5V; capacitor to ground controls output ramp time during startup. |
| SGND (Pin 5) | Signal Ground | Reference for feedback, compensation, and small-signal circuitry; connects to PGND at single point. |
| PVIN (Pins 7,14) | Power Input Supply | High-current VIN connection; requires local ceramic decoupling to PGND. |
| SW (Pins 8,9,12,13) | Switch Node | Drain connection of internal P-FET/N-FET; drives external inductor; high dv/dt node requiring tight layout. |
| SVIN (Pin 16) | Signal Input Supply | Bias supply for internal analog circuitry; decouple to SGND with ceramic capacitor. |
| PGOOD (Pin 17) | Power Good Monitor | Open-drain output pulled low if VOUT deviates >±7.5%; used for system enable/sequencing. |
| ITH (Pin 18) | Error Amplifier Compensation | Controls peak inductor current; voltage range 0.2V–1.4V; critical for loop stability and transient response. |
| VFB (Pin 19) | Feedback Input | Connects to resistive divider; regulates output using internal 0.8V reference; input bias <0.2µA. |
| Exposed Pad (Pin 21) | Thermal & Electrical Ground | Mandatory solder connection to PCB ground plane for thermal dissipation and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| OPTI-LOOP® Compensation | Enables wide-range output capacitor selection (ceramic, POSCAP, polymer) while maintaining stable transient response across load and temperature. |
| Selectable Operating Modes | Engineers choose between low-noise forced continuous mode or high-efficiency Burst Mode with adjustable clamp voltage for ripple optimization. |
| 100% Duty Cycle Operation | Supports ultra-low dropout regulation near input rail-critical for battery-powered systems where VIN may dip close to VOUT. |
| Internal Synchronous Switches | Eliminates external Schottky diode, reduces BOM count, improves efficiency by ~3–5% versus asynchronous designs at 4A load. |
| Overtemperature Protection | Thermal shutdown activates above 125°C junction temperature; allows safe operation under overload or poor airflow conditions. |
Applications
| Notebook Computers | Portable Instruments |
|---|---|
Use Scenario: Core voltage regulation for Intel Core i-series or AMD Ryzen mobile processors requiring dynamic load steps up to 4A. IC Role / Device Role / Timing Role: Primary point-of-load buck converter delivering stable 1.0V–1.35V at up to 4A with fast transient response. Use Value: OPTI-LOOP® compensation maintains regulation during CPU burst loads; Burst Mode extends battery runtime during idle periods. | Use Scenario: Powering precision ADCs, DACs, and op-amps in handheld multimeters or portable oscilloscopes. IC Role / Device Role / Timing Role: Low-noise, high-accuracy power source with ±2% output tolerance and <10mV ripple in forced continuous mode. Use Value: Internal 0.8V reference and low RDS(ON) ensure minimal load regulation error and thermal drift across temperature. |
| Distributed Power Systems | Industrial Embedded Controllers |
Use Scenario: Local regulation from 3.3V or 5V backplane to 1.8V/2.5V FPGA I/O banks or memory interfaces. IC Role / Device Role / Timing Role: High-efficiency intermediate bus converter supporting multiple downstream rails with programmable frequency to avoid EMI bands. Use Value: 4MHz max switching frequency enables compact 0.47µH inductors; PGOOD output coordinates power-up sequencing with other regulators. | Use Scenario: Powering ARM Cortex-M7 microcontrollers and CAN transceivers in DIN-rail mounted PLC modules. IC Role / Device Role / Timing Role: Robust main supply with overtemperature protection and 2.25V–5.5V input range tolerating brownouts and automotive-grade transients. Use Value: 100% duty cycle operation sustains output during low-VIN events; exposed TSSOP pad ensures thermal reliability in sealed enclosures. |
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 |
|---|---|---|---|
| TPS544B20RHLT | 4A, 2.95–16V input, 0.6V reference, integrated MOSFETs with higher RDS(ON) (12mΩ/8mΩ), no Burst Mode. | Designed for higher-input industrial rails; lacks low-IQ burst capability for battery use. | Choose when input exceeds 5.5V or when forced continuous-only operation is acceptable. |
| MP2315GJ-Z | 4A, 4.5–26V input, 0.8V reference, 65mΩ/35mΩ RDS(ON), fixed 500kHz frequency, no sync or mode select. | Targeted at cost-sensitive 12V-input applications; no programmable frequency or burst clamp adjustment. | Choose for fixed-frequency, high-input designs where layout simplicity outweighs flexibility. |
Compared with TPS544B20RHLT and MP2315GJ-Z, the LTC3414EFE#PBF uniquely combines ultra-low input voltage support (2.25V), selectable burst clamp, OPTI-LOOP® compensation, and 4MHz programmability-making it optimal for space-constrained, battery-powered systems demanding both efficiency and dynamic performance.
Availability
LTC3414EFE#PBF is available at Aetrix Electronics and suitable for notebook computers, portable instruments, and distributed power systems requiring stable component supply, long-term lifecycle assurance, and lead-free compliance.
Supply support for LTC3414EFE#PBF 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 (now part of Analog Devices, Inc., formerly Linear Technology) is a global leader in high-performance analog, mixed-signal, and power management ICs, serving precision instrumentation, communications, and industrial markets.
The LTC3414EFE#PBF belongs to the LTC® monolithic DC/DC regulator product line, engineered for high-efficiency, low-voltage point-of-load conversion in portable and space-constrained applications where thermal performance and transient response are critical.
FAQ
What is the maximum output current supported by the LTC3414EFE#PBF?
The LTC3414EFE#PBF delivers up to 4A of continuous output current under typical thermal conditions with proper PCB layout and heatsinking. Peak current limit is internally set to 6A–8A depending on ITH voltage and temperature; sustained 4A operation requires adherence to thermal limits (TJ ≤125°C) and use of the exposed pad for thermal conduction.
How does the LTC3414EFE#PBF achieve high efficiency at light loads?
The LTC3414EFE#PBF achieves high light-load efficiency through Burst Mode® operation, reducing quiescent current to 64µA by disabling internal circuitry and holding both MOSFETs off between bursts. The burst clamp voltage on SYNC/MODE sets minimum peak inductor current, allowing engineers to balance output ripple and efficiency per application requirements.
Can the LTC3414EFE#PBF operate with an input voltage as low as 2.25V?
Yes, the LTC3414EFE#PBF is fully specified to operate from 2.25V to 5.5V input. At low VIN, RDS(ON) increases slightly, so thermal design must account for higher conduction loss-especially during 100% duty cycle dropout operation. The 0.8V reference and low dropout capability make it ideal for single-cell Li-ion or coin-cell powered devices.
What is the purpose of the ITH pin on the LTC3414EFE#PBF?
The ITH pin on the LTC3414EFE#PBF serves as the error amplifier output and current comparator threshold control point. Its voltage (0.2V–1.4V) directly sets peak inductor current; it is central to loop compensation (OPTI-LOOP®), transient response tuning, and burst mode sleep/wake control-making it essential for stability and dynamic performance.
Does the LTC3414EFE#PBF support external frequency synchronization?
Yes, the LTC3414EFE#PBF supports external frequency synchronization via the SYNC/MODE pin, accepting clock signals from 300kHz to 4MHz. When synchronized, the internal oscillator locks to the falling edge of the external clock, enabling EMI reduction and multi-rail timing coordination-provided the external frequency exceeds the RT-resistor-set frequency by ≥25% for stable slope compensation.
LTC3414EFE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.25V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 4A
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
LTC3414EFE#PBF FAQ
1.How can I place an order for LTC3414EFE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3414EFE#PBF 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 LTC3414EFE#PBF reliable?
The price and inventory of LTC3414EFE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3414EFE#PBF is usually 5 days.
3.What payment methods are accepted for LTC3414EFE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3414EFE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3414EFE#PBF?
LTC3414EFE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3414EFE#PBF 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 LTC3414EFE#PBF?
For technical support, including LTC3414EFE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3414EFE#PBF requirements.
6.How does Aetrix verify that LTC3414EFE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3414EFE#PBF 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 LTC3414EFE#PBF meets industry standards.
7.What is the process for return or replacement of LTC3414EFE#PBF?
All LTC3414EFE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3414EFE#PBF, 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 LTC3414EFE#PBF part is unused and in its original packaging.
Return procedure for LTC3414EFE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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