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Analog Devices Inc. LTC3414MPFE#TRPBF
- Part No.:
- LTC3414MPFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3414MPFE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 4A 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,453
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Product details
Overview
LTC3414MPFE#TRPBF from Analog Devices is a high-efficiency monolithic synchronous step-down DC/DC regulator delivering up to 4A output current at 0.8V–5V with ±2% output voltage accuracy, 2.25V–5.5V input range, and programmable switching frequency from 300kHz to 4MHz. It integrates low-RDS(ON) P- and N-channel MOSFETs (67mΩ/50mΩ), supports Burst Mode® and forced continuous operation, and features Power Good monitoring - deployed in point-of-load regulation for notebook computers and portable instruments.
For engineers reviewing the LTC3414MPFE#TRPBF datasheet, LTC3414MPFE#TRPBF pinout, LTC3414MPFE#TRPBF application, or LTC3414MPFE#TRPBF equivalent, key selection considerations include its –55°C to 125°C MP-grade temperature rating, exposed-pad 20-lead TSSOP package, OPTI-LOOP® compensation for transient optimization, 64µA quiescent current in Burst Mode®, and 100% duty cycle low-dropout capability for battery-powered systems.
Technical Context
The LTC3414MPFE#TRPBF employs constant-frequency current-mode control with internal slope compensation recovery to maintain stable peak inductor current across duty cycles >50%. Its dual-MOSFET synchronous architecture eliminates external diode losses and enables high efficiency (up to 95%) across wide load and input ranges.
It supports three operating modes via the SYNC/MODE pin: forced continuous (for low-noise applications), Burst Mode® (with adjustable burst clamp for ripple control), and pulse-skipping (SYNC/MODE = GND). The ITH pin serves as both error amplifier output and current limit threshold control, while PGOOD provides open-drain output voltage monitoring with ±7.5% trip threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4A maximum continuous - supports high-current point-of-load rails in portable computing and instrumentation. |
| Input Voltage Range | 2.25V to 5.5V - compatible with single-cell Li-ion, Li-polymer, and multi-cell alkaline/NiMH battery inputs. |
| Output Voltage Accuracy | ±2% over full temperature and line/load range - ensures reliable regulation for sensitive digital loads. |
| Switching Frequency | 300kHz to 4MHz (resistor- or clock-synchronized) - enables trade-off between small passive size (high-freq) and efficiency (low-freq). |
| RDS(ON) (P-FET) | 67mΩ typical at TA = 25°C - reduces conduction loss and thermal stress in high-current buck stages. |
| Quiescent Current | 64µA in Burst Mode® - extends battery runtime in standby and light-load conditions. |
| Duty Cycle | 100% - maintains regulation during deep battery discharge down to VOUT + VDS(ON). |
| Reference Voltage | 0.800V ±0.016V (MP grade) - enables precise low-voltage outputs (e.g., 0.8V core rails) with minimal external divider error. |
Pinout & Package
Package: 20-lead Exposed Pad Plastic 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, TJMAX = 125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (1,10,11,20) | Power Ground | Low-impedance return path for high-current switch node and input/output capacitors; must connect directly to CIN/COUT (–) terminals. |
| RT (2) | Oscillator Timing Input | Resistor-to-ground sets switching frequency; ROSC = 3.08×10¹¹/f − 10kΩ (f in Hz). |
| SYNC/MODE (3) | Mode Control & Sync Input | Selects Burst Mode® (0–1V), forced continuous (tied to SVIN), or external clock sync (300kHz–4MHz). |
| RUN/SS (4) | Enable & Soft-Start | <0.5V disables regulator (IQ < 1µA); capacitor-to-ground controls soft-start 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- and N-channel MOSFETs; drives external inductor. |
| SVIN (16) | Signal Input Supply | Bias supply for control circuitry; decoupled to SGND with ceramic capacitor. |
| PGOOD (17) | Power Good Monitor | Open-drain output pulled low if VOUT deviates >±7.5% from setpoint - used for system sequencing and fault detection. |
| ITH (18) | Error Amplifier Output / Current Limit Threshold | Voltage controls peak inductor current (0.2V–1.4V range); also used by burst comparator to enter/exit sleep mode. |
| 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 external compensation network tuning to optimize transient response across wide output capacitance and load ranges - critical for stable point-of-load regulation. |
| Adjustable Burst Clamp | External voltage on SYNC/MODE pin sets minimum peak inductor current (0–7A), enabling precise control of output ripple vs. light-load efficiency trade-off. |
| Synchronous Dual-MOSFET Architecture | Integrated 67mΩ P-FET and 50mΩ N-FET eliminate Schottky diode losses and reduce board area - improves full-load efficiency by ~3–5% vs. asynchronous designs. |
| 100% Duty Cycle Operation | Enables dropout regulation down to VOUT + IOUT×RDS(ON), extending usable battery life in portable systems without requiring secondary LDOs. |
| Overtemperature Protection | Internal thermal shutdown activates above 125°C junction temperature - prevents permanent damage during overload or poor heatsinking conditions. |
| Low IQ Sleep Mode | 64µA quiescent current in Burst Mode® sleep state - minimizes battery drain during extended idle periods in handheld devices. |
Applications
| Mobile Notebook CPU Core Rail | Portable Medical Instrument ADC Supply |
|---|---|
Use Scenario: Regulating 0.85V/3.5A core voltage for ARM-based SoC in ultra-thin notebook with single-cell Li-ion battery (2.7V–4.2V). IC Role / Device Role / Timing Role: Primary synchronous buck converter providing tightly regulated, low-noise core power with fast load-step response. Use Value: 95% peak efficiency and 100% duty cycle sustain operation down to 0.85V + (3.5A)(67mΩ) ≈ 1.09V input - maximizing battery runtime and eliminating need for intermediate conversion stages. | Use Scenario: Generating clean 3.3V/2A analog supply for high-resolution SAR ADC and precision op-amps in battery-powered ECG monitor. IC Role / Device Role / Timing Role: Low-ripple, low-noise point-of-load regulator with selectable forced continuous mode to suppress switching harmonics near sensitive analog front-end. Use Value: Forced continuous operation reduces output voltage ripple to <5mVPP and eliminates burst-frequency interference - preserving ADC SNR and measurement accuracy. |
| Distributed Power System Intermediate Bus | Industrial Handheld Scanner Logic Rail |
Use Scenario: Converting 5V intermediate bus to 1.2V/4A for FPGA fabric and memory interface in compact industrial controller. IC Role / Device Role / Timing Role: High-current, thermally robust buck regulator with exposed-pad TSSOP package mounted on 2-oz copper layer for enhanced heat dissipation. Use Value: MP-grade (–55°C to 125°C) rating and 38°C/W θJA ensure reliable operation in sealed enclosures with limited airflow - avoiding thermal derating in field deployments. | Use Scenario: Powering 1.8V/1.2A logic and interface circuitry in ruggedized barcode scanner operating from 3.6V Li-ion pack. IC Role / Device Role / Timing Role: Efficient, compact DC/DC solution supporting dynamic load profiles (idle, scan burst, wireless transmit) with rapid transient recovery. Use Value: OPTI-LOOP® compensation and 4MHz max switching frequency enable <10µs recovery from 0→4A load steps - preventing logic glitches during high-speed scanning sequences. |
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 |
|---|---|---|---|
| LTC3630EMSE#PBF | 3A max output, 3.6V–36V input, no Burst Mode®, fixed 500kHz/1MHz freq, MSOP-10 package | Targets higher-input industrial/motor-control rails; lacks low-IQ sleep mode and adjustable burst clamp | Choose when input exceeds 5.5V or board space is constrained (smaller package), but avoid for battery-powered light-load apps. |
| TPS544B20RNQT | 4A, 4.5V–18V input, 600kHz–2MHz sync, integrated FETs (RDS(ON) 12.5mΩ/8.5mΩ), 0.6V ref, smaller 20-pin QFN | Higher input range, lower RDS(ON), but rated only to 105°C (not extended temp); no 100% duty cycle | Prefer for cost-sensitive industrial designs with >4.5V input and ambient <105°C; not suitable for –55°C or true low-dropout battery apps. |
Compared with LTC3414MPFE#TRPBF, LTC3630EMSE#PBF offers wider input range but sacrifices light-load efficiency and thermal ruggedness, while TPS544B20RNQT delivers lower conduction loss and smaller footprint yet lacks extended temperature support and 100% duty cycle - making LTC3414MPFE#TRPBF uniquely suited for high-reliability, battery-critical, wide-temperature embedded systems.
Availability
LTC3414MPFE#TRPBF is available at Aetrix Electronics and suitable for notebook computers, portable medical instruments, and distributed power systems requiring stable component supply, extended temperature operation, and high-efficiency point-of-load conversion.
Supply support for LTC3414MPFE#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 precision instrumentation, communications, and industrial markets.
The LTC3414MPFE#TRPBF belongs to the Linear Technology (now part of Analog Devices) high-efficiency monolithic DC/DC regulator product line, designed specifically for demanding point-of-load applications in portable, battery-powered, and thermally constrained systems.
FAQ
What is the guaranteed operating temperature range for the LTC3414MPFE#TRPBF?
The LTC3414MPFE#TRPBF is an MP-grade device guaranteed over the full –55°C to +125°C junction temperature range, with thermal protection activating above 125°C. This makes it suitable for aerospace, military, and harsh-environment industrial applications where commercial or industrial grade parts would fail.
How does the LTC3414MPFE#TRPBF achieve 100% duty cycle operation, and what is its practical benefit?
The LTC3414MPFE#TRPBF achieves 100% duty cycle by holding the internal P-channel MOSFET continuously on when input voltage approaches output voltage. This allows regulation down to VOUT + IOUT×RDS(ON), extending usable battery life in portable systems - for example, sustaining 0.8V output even as a single Li-ion cell discharges below 1.0V.
Can the LTC3414MPFE#TRPBF be synchronized to an external clock, and what are the constraints?
Yes, the LTC3414MPFE#TRPBF can be synchronized to an external clock applied to the SYNC/MODE pin across 300kHz–4MHz. The external clock must exceed the resistor-set frequency by ≥25% to ensure adequate slope compensation; during sync, burst clamp is fixed at 0V and switching begins at each falling edge of the clock signal.
What is the role of the ITH pin in the LTC3414MPFE#TRPBF beyond compensation?
In addition to serving as the error amplifier output for loop compensation, the ITH pin in the LTC3414MPFE#TRPBF directly sets peak inductor current and acts as the input to the burst comparator. When ITH falls below 150mV during light loads, the device enters sleep mode - reducing quiescent current to 64µA while maintaining regulation via output capacitor discharge.
How does OPTI-LOOP® compensation improve system-level performance in the LTC3414MPFE#TRPBF?
OPTI-LOOP® compensation in the LTC3414MPFE#TRPBF allows external RC networks on the ITH pin to tailor loop bandwidth and phase margin across varying output capacitance (e.g., 470µF POSCAP vs. dual 100µF ceramics) and load conditions - ensuring stable transient response without overdesigning the output filter or sacrificing regulation speed.
LTC3414MPFE#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:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
LTC3414MPFE#TRPBF FAQ
1.How can I place an order for LTC3414MPFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3414MPFE#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 LTC3414MPFE#TRPBF reliable?
The price and inventory of LTC3414MPFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3414MPFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3414MPFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3414MPFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3414MPFE#TRPBF?
LTC3414MPFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3414MPFE#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 LTC3414MPFE#TRPBF?
For technical support, including LTC3414MPFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3414MPFE#TRPBF requirements.
6.How does Aetrix verify that LTC3414MPFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3414MPFE#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 LTC3414MPFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3414MPFE#TRPBF?
All LTC3414MPFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3414MPFE#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 LTC3414MPFE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3414MPFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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