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Analog Devices Inc. LTC3414IFE#PBF
- Part No.:
- LTC3414IFE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3414IFE#PBF.pdf
- Description:
- IC REG BUCK ADJ 4A 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:666
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Product details
Overview
LTC3414IFE#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 supports point-of-load regulation in notebook computers and portable instruments with low quiescent current (64µA) and 100% duty cycle low-dropout operation.
For engineers reviewing the LTC3414IFE#PBF datasheet, LTC3414IFE#PBF pinout, LTC3414IFE#PBF application, or LTC3414IFE#PBF equivalent, key selection considerations include input voltage range (2.25V–5.5V), Burst Mode® vs forced continuous mode control, OPTI-LOOP® compensation tuning, PGOOD monitoring, and thermal performance in the 20-lead Exposed TSSOP package.
Technical Context
The LTC3414IFE#PBF employs constant-frequency current-mode control with internal slope compensation recovery to maintain stable peak inductor current across duty cycles >40%. Its dual-MOSFET architecture integrates a 67mΩ P-channel high-side switch and 50mΩ N-channel synchronous rectifier, eliminating external diode losses.
Control logic enables three operating modes via the SYNC/MODE pin: forced continuous (tied to SVIN), Burst Mode® (0V–1V clamp voltage), or pulse-skipping (grounded). The ITH pin serves as both error amplifier output and burst comparator input, while PGOOD provides open-drain output voltage monitoring with ±7.5% trip threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.25V to 5.5V - supports single-cell Li-ion, USB PD, and 3.3V/5V rail inputs without external LDO pre-regulation. |
| Output Current | Up to 4A - delivers full rated load with <100mV dropout at 100% duty cycle under low VIN conditions. |
| Switching Frequency | 300kHz to 4MHz - set by external RT resistor or synchronized to external clock; enables compact 0.2µH–1µH inductor selection. |
| Feedback Reference | 0.8V ±2% - allows precise low-VOUT programming (e.g., 0.8V core supply) with standard resistor divider networks. |
| Quiescent Current | 64µA in Burst Mode - extends battery runtime in portable systems during light-load sleep states. |
| Thermal Protection | Overtemperature shutdown at TJ = 125°C - protects against sustained overload or poor PCB thermal design. |
| Power Good Output | Open-drain PGOOD with ±7.5% window - enables system-level power sequencing and fault detection without external comparators. |
Pinout & Package
The LTC3414IFE#PBF is housed in a 20-lead Exposed TSSOP package (FE grade) with exposed pad (Pin 21) requiring solder connection to SGND for thermal and electrical integrity. θJA = 38°C/W and θJC = 10°C/W support high-power density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pins 1,10,11,20) | Power Ground Return | Low-impedance path for high di/dt switch currents; must connect directly to CIN/COUT (–) terminals. |
| RT (Pin 2) | Oscillator Timing Input | Resistor-to-ground sets switching frequency; ROSC = 308kΩ yields ~4MHz operation. |
| SYNC/MODE (Pin 3) | Mode Control & Sync Input | Selects Burst Mode® (0–1V), forced continuous (tied to SVIN), or external clock sync (300kHz–4MHz). |
| RUN/SS (Pin 4) | Enable & Soft-Start Control | Below 0.5V disables IC; capacitor-to-ground controls output ramp time during startup. |
| SGND (Pin 5) | Signal Ground Reference | Reference for VFB, ITH, and compensation network; connects to PGND at single point to avoid noise coupling. |
| PVIN (Pins 7,14) | High-Current Input Supply | Bypassed to PGND with low-ESR ceramic capacitors; handles peak switch currents up to 9.5A. |
| SW (Pins 8,9,12,13) | Switch Node Connection | Drain nodes of internal P/N-FETs; connects directly to inductor; requires minimal loop area for EMI reduction. |
| VFB (Pin 19) | Feedback Input | Monitors resistive divider output; 0.2µA input bias enables high-value resistor networks for low power loss. |
| ITH (Pin 18) | Error Amplifier Output | Controls peak inductor current; voltage range 0.2V–1.4V maps to zero-sense to full-scale current limit. |
| PGOOD (Pin 17) | Power Status Monitor | Open-drain output pulled low if VOUT deviates >±7.5%; drives microcontroller reset or sequencer enable. |
Key Features
| Feature | Design Value |
|---|---|
| OPTI-LOOP® Compensation | Allows stability optimization across wide output capacitor ESR ranges and load transients without external compensation components. |
| Selectable Operating Mode | Configurable Burst Mode® (64µA IQ) or forced continuous (low-noise, low-ripple) via single SYNC/MODE pin voltage. |
| Synchronous Rectification | Integrated 67mΩ P-FET + 50mΩ N-FET eliminates Schottky losses and improves efficiency >95% at 4A. |
| 100% Duty Cycle Operation | Enables ultra-low dropout regulation down to VIN – (IL × RDS(ON)), extending usable battery voltage range. |
| Programmable Burst Clamp | External SYNC/MODE voltage sets minimum peak inductor current (0–7A), enabling ripple vs efficiency trade-off tuning. |
Applications
| Notebook Computers | Portable Instruments |
|---|---|
Use Scenario: Regulating CPU/GPU core voltage (0.8V–1.2V) from 3.3V or battery input in ultrabooks with strict thermal and size constraints. IC Role / Device Role / Timing Role: Primary point-of-load buck regulator providing fast transient response and tight output accuracy under dynamic load steps. Use Value: 4A capability and 64µA quiescent current extend battery life while maintaining sub-2% voltage regulation during processor burst loads. | Use Scenario: Powering precision ADCs, DACs, and op-amps in handheld multimeters and data loggers operating from single Li-ion cells. IC Role / Device Role / Timing Role: Low-noise, low-ripple power source with forced continuous mode enabled to avoid switching artifacts in analog signal chains. Use Value: ±2% output accuracy and 0.8V reference ensure stable reference voltages; 100% duty cycle maintains regulation down to 2.25V input. |
| Distributed Power Systems | Point-of-Load Regulation |
Use Scenario: Local regulation on PCBs with long power distribution traces, where intermediate bus voltage (e.g., 5V or 3.3V) feeds multiple LTC3414IFE#PBF converters. IC Role / Device Role / Timing Role: Isolated, high-efficiency local converter minimizing IR drop and noise coupling between subsystems. Use Value: Synchronization capability allows multiple LTC3414IFE#PBF units to operate on common clock, reducing beat frequencies and EMI peaks. | Use Scenario: Delivering clean, regulated 1.8V or 2.5V to FPGAs, ASICs, or memory interfaces requiring fast load-step response and minimal voltage deviation. IC Role / Device Role / Timing Role: High-bandwidth current-mode controller with OPTI-LOOP® compensation ensuring stability with ceramic output capacitors. Use Value: 4MHz max switching frequency enables <1µH inductors and <10µF ceramic output caps, reducing board area and cost. |
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 |
|---|---|---|---|
| TPS544B20RMLR | 4A, 2.95–16V input, 0.6V reference, integrated MOSFETs (8.5mΩ/3.5mΩ), 400kHz–2MHz sync range | Wider VIN range suits 12V intermediate bus; lower RDS(ON) improves high-current efficiency but lacks Burst Mode® | Choose for higher input voltage systems needing tighter thermal margin; not suitable for 2.25V–3.3V battery inputs. |
| MP2315GJ-Z | 4A, 4.5–28V input, 0.8V reference, 45mΩ/25mΩ MOSFETs, fixed 500kHz frequency, no sync or Burst Mode® | Higher minimum VIN excludes low-voltage battery use; simpler control interface but no light-load efficiency optimization | Prefer for cost-sensitive industrial supplies with stable 5V+ input; lacks PGOOD and adjustable frequency needed for portable designs. |
Compared with TPS544B20RMLR and MP2315GJ-Z, the LTC3414IFE#PBF uniquely combines ultra-low input voltage support (2.25V), programmable Burst Mode®, and 4MHz switching in a thermally enhanced TSSOP-making it optimal for space-constrained, battery-powered applications demanding both high efficiency and precision regulation.
Availability
LTC3414IFE#PBF is available at Aetrix Electronics and suitable for notebook computers, portable instruments, and distributed power systems requiring stable component supply, long-term lifecycle support, and guaranteed temperature-grade performance.
Supply support for LTC3414IFE#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 is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving precision instrumentation, communications, and industrial markets since 1965.
The LTC3414IFE#PBF belongs to Analog Devices' Power by Linear™ family of high-efficiency monolithic DC/DC regulators, designed specifically for demanding point-of-load applications in portable, battery-powered, and thermally constrained systems.
FAQ
What is the maximum output current capability of the LTC3414IFE#PBF?
The LTC3414IFE#PBF delivers up to 4A of continuous output current under typical thermal conditions with adequate PCB copper and airflow. Peak switch current capability is 9.5A, and the device includes overtemperature protection that activates at 125°C junction temperature to prevent damage during overload or poor heatsinking scenarios. Derating is required above 85°C ambient per the datasheet thermal characteristics.
How does the SYNC/MODE pin configure operating modes on the LTC3414IFE#PBF?
The SYNC/MODE pin on the LTC3414IFE#PBF selects three distinct functions: tying it to SVIN forces continuous conduction mode; applying 0V–1V enables Burst Mode® with externally programmable burst clamp; grounding it implements pulse-skipping. When used for synchronization, an external clock (300kHz–4MHz) overrides the RT-set frequency, locking switching edges to the falling edge of the input clock signal.
What is the purpose of the ITH pin on the LTC3414IFE#PBF and how is it used in design?
The ITH pin on the LTC3414IFE#PBF serves as the error amplifier output and current comparator threshold control node. Its voltage (0.2V–1.4V) directly sets peak inductor current. During Burst Mode®, the ITH pin is monitored by the burst comparator to detect sleep entry (at ~150mV) and wake-up. No external compensation is required for basic operation, but Type II/III networks can be added to ITH for advanced loop shaping in high-dynamic-range applications.
Can the LTC3414IFE#PBF operate with input voltages below 3.3V, and what are the limitations?
Yes, the LTC3414IFE#PBF operates from 2.25V to 5.5V input, making it suitable for single-cell Li-ion (2.7V–4.2V) and low-voltage logic rails. At low VIN near 2.25V, RDS(ON) of both internal MOSFETs increases, raising conduction losses. Full 4A output requires careful thermal design, and 100% duty cycle operation becomes critical to maintain regulation-verified by checking voltage drop across the P-FET under worst-case load and temperature.
What package type and thermal characteristics define the LTC3414IFE#PBF?
The LTC3414IFE#PBF uses a 20-lead Exposed TSSOP (FE) package with an exposed thermal pad (Pin 21) that must be soldered to SGND for optimal thermal performance. Its thermal resistance is θJA = 38°C/W (JEDEC 2s2p board) and θJC = 10°C/W. The device is rated for –40°C to +85°C operation (I-grade), with overtemperature protection engaging at 125°C junction temperature to safeguard reliability during transient overloads.
LTC3414IFE#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
LTC3414IFE#PBF FAQ
1.How can I place an order for LTC3414IFE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3414IFE#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 LTC3414IFE#PBF reliable?
The price and inventory of LTC3414IFE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3414IFE#PBF is usually 5 days.
3.What payment methods are accepted for LTC3414IFE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3414IFE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3414IFE#PBF?
LTC3414IFE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3414IFE#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 LTC3414IFE#PBF?
For technical support, including LTC3414IFE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3414IFE#PBF requirements.
6.How does Aetrix verify that LTC3414IFE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3414IFE#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 LTC3414IFE#PBF meets industry standards.
7.What is the process for return or replacement of LTC3414IFE#PBF?
All LTC3414IFE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3414IFE#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 LTC3414IFE#PBF part is unused and in its original packaging.
Return procedure for LTC3414IFE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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