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Analog Devices Inc. LTC3414EFE#TRPBF
- Part No.:
- LTC3414EFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3414EFE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 4A 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,644
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Product details
Overview
LTC3414EFE#TRPBF 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 serves as a high-efficiency point-of-load power supply in notebook computers and portable instrumentation.
For engineers reviewing the LTC3414EFE#TRPBF datasheet, LTC3414EFE#TRPBF pinout, LTC3414EFE#TRPBF application, or LTC3414EFE#TRPBF equivalent, key selection considerations include its 2.25V–5.5V input range, Burst Mode® vs forced continuous operation trade-offs, OPTI-LOOP® compensation for transient optimization, 64µA quiescent current in sleep mode, and exposed-pad 20-lead TSSOP thermal performance.
Technical Context
The LTC3414EFE#TRPBF employs constant-frequency current-mode control with internal P-channel (67mΩ) and N-channel (50mΩ) synchronous switches, enabling 95% peak efficiency and 100% duty-cycle low-dropout operation. Its error amplifier drives the ITH pin to regulate output via a 0.8V reference, while slope compensation recovery maintains stable peak inductor current across duty cycles >40%.
Frequency is set by an external resistor on RT or synchronized externally via SYNC/MODE (300kHz–4MHz), with mode selection (Burst/Forced Continuous/Pulse-Skipping) controlled by SYNC/MODE voltage (0V–SVIN). Power Good monitoring, overtemperature protection, and soft-start via RUN/SS provide system-level robustness.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.25V to 5.5V - supports single-cell Li-ion, USB, and intermediate bus rails without pre-regulation. |
| Output Current | Up to 4A - delivers full rated load with thermal management via exposed pad in 20-lead TSSOP. |
| Switching Frequency | 300kHz to 4MHz - adjustable via RT resistor or external sync clock; enables compact magnetics at high frequencies. |
| Output Voltage Accuracy | ±2% - ensures tight regulation across line, load, and temperature for sensitive digital loads. |
| Quiescent Current | 64µA in Burst Mode sleep - extends battery life in portable systems during light-load standby. |
| RDS(ON) (P-FET) | 67mΩ typical - reduces conduction loss and improves efficiency at medium-to-high loads. |
| RDS(ON) (N-FET) | 50mΩ typical - enables efficient synchronous rectification and eliminates external Schottky diode. |
Pinout & Package
Package: 20-lead Exposed Pad Plastic TSSOP (FE package); exposed pad (Pin 21) must be soldered to PCB for thermal and electrical integrity (θJA = 38°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (1,10,11,20) | Power Ground | Low-impedance return path for high-current switch node; must connect directly to CIN/COUT (–) terminals. |
| RT (2) | Oscillator Timing Input | Resistor-to-ground sets switching frequency; ROSC = 3.08×10¹¹/f – 10kΩ. |
| SYNC/MODE (3) | Mode Control & Sync Input | Selects Burst Mode (0–1V), Forced Continuous (tied to SVIN), or Pulse-Skipping (ground); also accepts external sync clock (300kHz–4MHz). |
| RUN/SS (4) | Enable & Soft-Start | <0.5V disables device (IQ < 1µA); capacitor-to-ground controls output ramp time. |
| SGND (5) | Signal Ground | Reference for feedback, compensation, and small-signal circuitry; connects to PGND at single point. |
| PVIN (7,14) | Power Input Supply | High-current VIN connection; requires local ceramic decoupling to PGND. |
| SW (8,9,12,13) | Switch Node | Drain connection of internal P-FET and N-FET; routes to inductor; high dv/dt node requiring short layout. |
| SVIN (16) | Signal Input Supply | Bias supply for control circuitry; decouple to SGND with ceramic capacitor. |
| PGOOD (17) | Power Good Output | Open-drain flag pulled low if VOUT deviates >±7.5% from regulation point. |
| ITH (18) | Error Amplifier Compensation | Voltage-controlled current limit threshold (0.2V–1.4V); determines peak inductor current. |
| VFB (19) | Feedback Input | Monitors resistive divider output; regulates VOUT = 0.8V × (1 + R2/R1). |
| Exposed Pad (21) | Thermal & Electrical Ground | Mandatory solder connection to SGND plane for thermal dissipation and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| OPTI-LOOP® Compensation | Allows loop stability and transient response optimization across wide output capacitance and load ranges without external component changes. |
| Selectable Operation Modes | Burst Mode (64µA IQ), Forced Continuous (low-noise), or Pulse-Skipping (low-ripple discontinuous) - selected via SYNC/MODE voltage. |
| 100% Duty Cycle Low-Dropout | Enables regulation down to VIN ≈ VOUT, extending usable battery voltage range in portable systems. |
| Internal Synchronous Switches | Eliminates need for external Schottky diode, reducing BOM count and improving efficiency at all loads. |
| Power Good Monitoring | Dedicated open-drain PGOOD output provides system-level fault detection and sequencing capability. |
Applications
| Notebook Computers | Portable Instruments |
|---|---|
Use Scenario: Core voltage regulation for Intel Core i-series or AMD Ryzen mobile processors requiring 1.0V/3A with fast load transient response. IC Role / Device Role / Timing Role: Primary point-of-load buck regulator delivering tightly regulated CPU core voltage with <100mV undershoot during 0→4A load steps. Use Value: 95% peak efficiency and 64µA quiescent current in Burst Mode extend battery runtime; OPTI-LOOP® ensures stability with low-ESR ceramic output capacitors. | Use Scenario: Powering FPGA I/O banks and ADC/DAC analog supplies in handheld test equipment operating from 3.7V Li-ion battery. IC Role / Device Role / Timing Role: Dual-rail generator (1.2V/2A and 3.3V/1.5A using two LTC3414s) with independent mode control per rail. Use Value: Programmable 300kHz–4MHz frequency allows EMI tuning; ±2% output accuracy meets precision data converter requirements. |
| Distributed Power Systems | Point-of-Load Regulation |
Use Scenario: Intermediate bus conversion (5V → 1.8V/4A) in telecom line cards where board space and thermal density are constrained. IC Role / Device Role / Timing Role: High-current secondary-side buck converter replacing discrete controller + external MOSFETs. Use Value: Integrated 67mΩ/50mΩ FETs reduce conduction loss; exposed-pad TSSOP enables 38°C/W thermal resistance for high-power density. | Use Scenario: Regulating DDR memory termination voltage (VTT = 0.9V) and reference voltage (VREF = 0.45V) in embedded computing modules. IC Role / Device Role / Timing Role: Precision low-voltage buck regulator using 0.8V internal reference and external resistor divider. Use Value: 0.8V reference enables accurate sub-1V outputs; ±2% accuracy ensures DDR compliance; low dropout preserves margin during brownout. |
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 |
|---|---|---|---|
| TPS544B20RTWR | 4A, 4.5–18V input, 0.6V reference, integrated FETs, 500kHz–2MHz freq; no Burst Mode, higher IQ (250µA active) | Targets higher-input industrial systems; lacks ultra-low-IQ sleep mode for battery operation | Choose for 12V intermediate bus applications where input exceeds 5.5V; avoid for Li-ion-powered devices requiring 64µA sleep IQ. |
| MP2315GJ-Z | 4A, 4.5–28V input, 0.8V reference, 120mΩ/70mΩ FETs, 350kHz–2.5MHz freq; no sync input or PGOOD | Cost-optimized for fixed-frequency industrial supplies; missing system features (sync, PGOOD, OPTI-LOOP®) | Choose for cost-sensitive non-battery applications with stable 12V input; avoid where frequency synchronization or power sequencing is required. |
Compared with TPS544B20RTWR and MP2315GJ-Z, the LTC3414EFE#TRPBF uniquely combines ultra-low 64µA quiescent current in Burst Mode, 2.25V minimum input for single-cell Li-ion support, and OPTI-LOOP® for wide-capacitance stability-making it optimal for portable, battery-critical designs demanding both efficiency and design flexibility.
Availability
LTC3414EFE#TRPBF is available at Aetrix Electronics and suitable for notebook computers, portable instrumentation, and distributed power systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC3414EFE#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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC3414EFE#TRPBF 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 and space-constrained systems where thermal performance, light-load efficiency, and transient response are critical.
FAQ
What is the minimum input voltage supported by the LTC3414EFE#TRPBF?
The LTC3414EFE#TRPBF supports a minimum input voltage of 2.25V, enabling direct operation from single-cell Li-ion batteries (2.7V–4.2V) and low-voltage intermediate rails. This specification is guaranteed over the full –40°C to 85°C operating temperature range for the E-grade version, and the device maintains regulation down to 100% duty cycle when input approaches output voltage.
How does the SYNC/MODE pin configure Burst Mode versus Forced Continuous operation on the LTC3414EFE#TRPBF?
On the LTC3414EFE#TRPBF, connecting SYNC/MODE to SVIN forces continuous conduction mode for low-noise operation, while applying 0V–1V enables Burst Mode with adjustable burst clamp level. Grounding SYNC/MODE implements Pulse-Skipping. The pin also accepts external 300kHz–4MHz clock signals for frequency synchronization, with internal oscillator disabled during sync lock.
What thermal performance can be expected from the LTC3414EFE#TRPBF in its 20-lead TSSOP package?
The LTC3414EFE#TRPBF uses a 20-lead exposed-pad TSSOP (FE) package with θJA = 38°C/W and θJC = 10°C/W when the exposed pad is properly soldered to a thermal plane. At 4A output with 3.3V input and 1.2V output, typical junction temperature rise is ~45°C above ambient under standard 2-layer PCB conditions, well within the 125°C maximum junction temperature limit.
Does the LTC3414EFE#TRPBF require an external Schottky diode?
No, the LTC3414EFE#TRPBF does not require an external Schottky diode because it integrates both high-side P-channel (67mΩ) and low-side N-channel (50mΩ) synchronous power MOSFETs. This internal synchronous rectification eliminates conduction losses associated with external diodes and improves full-load efficiency by up to 5% compared to asynchronous buck topologies.
What is the purpose of the ITH pin on the LTC3414EFE#TRPBF, and how is it used in loop compensation?
The ITH pin on the LTC3414EFE#TRPBF is the error amplifier output and current limit threshold control node, with nominal operating range 0.2V–1.4V. It sets peak inductor current and serves as the compensation point for OPTI-LOOP®-a proprietary architecture that dynamically adjusts compensation to maintain stability across varying output capacitor ESR and capacitance values without manual re-tuning.
LTC3414EFE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-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):
- 2.25V
- 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#TRPBF FAQ
1.How can I place an order for LTC3414EFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3414EFE#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 LTC3414EFE#TRPBF reliable?
The price and inventory of LTC3414EFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3414EFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3414EFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3414EFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3414EFE#TRPBF?
LTC3414EFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3414EFE#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 LTC3414EFE#TRPBF?
For technical support, including LTC3414EFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3414EFE#TRPBF requirements.
6.How does Aetrix verify that LTC3414EFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3414EFE#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 LTC3414EFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3414EFE#TRPBF?
All LTC3414EFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3414EFE#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 LTC3414EFE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3414EFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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