My Inquiry
My Account
Analog Devices Inc. LTC3414MPFE#PBF
- Part No.:
- LTC3414MPFE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3414MPFE#PBF.pdf
- Description:
- IC REG BUCK ADJ 4A 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:422
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3414MPFE#PBF 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 features internal 67mΩ P-channel and 50mΩ N-channel MOSFETs, Burst Mode® operation for ultra-low 64µA quiescent current, and Power Good monitoring - deployed in point-of-load regulation for notebook computers and portable instrumentation.
For engineers reviewing the LTC3414MPFE#PBF datasheet, LTC3414MPFE#PBF pinout, LTC3414MPFE#PBF application, or LTC3414MPFE#PBF equivalent, key selection criteria include its –55°C to 125°C MP-grade temperature rating, exposed-pad 20-lead TSSOP package, OPTI-LOOP® compensation for transient optimization, selectable forced continuous/Burst Mode® operation, and 100% duty cycle low-dropout capability for battery-powered systems.
Technical Context
The LTC3414MPFE#PBF employs constant-frequency current-mode control with internal slope compensation recovery to maintain stable peak inductor current across duty cycles >50%. Its dual-MOSFET architecture integrates a 67mΩ P-channel high-side switch and 50mΩ N-channel synchronous rectifier, eliminating external diode losses.
Switching frequency is set via an external resistor on RT or synchronized externally (300kHz–4MHz) at the SYNC/MODE pin. The ITH pin serves as the error amplifier output and current comparator threshold control point (0.2V–1.4V), while VFB references a precision 0.8V bandgap (±2% over temperature).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4A maximum continuous - supports high-current PoL rails in compact portable systems without external power stages. |
| Input Voltage Range | 2.25V to 5.5V - enables direct regulation from single-cell Li-ion (2.7V min), USB 3.3V, or dual-cell alkaline sources. |
| Output Voltage Accuracy | ±2% over full temperature and line/load - ensures reliable logic supply compliance for FPGA, ASIC, and microprocessor cores. |
| Quiescent Current | 64µA in Burst Mode® - extends battery runtime in standby/sleep states of handheld instruments and IoT edge nodes. |
| Switch RDS(ON) | 67mΩ (P-FET) / 50mΩ (N-FET) - minimizes conduction loss at 4A, enabling >95% peak efficiency at 2.5V/4A (VIN = 3.3V). |
| Switching Frequency | 300kHz to 4MHz (programmable) - allows trade-off between small LC size (high-freq) and EMI/efficiency (low-freq) per board layout constraints. |
| Operating Temperature | –55°C to +125°C (MP grade) - qualified for harsh-environment industrial, avionics, and downhole electronics applications. |
Pinout & Package
Package: 20-lead Exposed Pad Plastic TSSOP (FE). Exposed pad (Pin 21) must be soldered to PCB for thermal and electrical grounding to SGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (1,10,11,20) | Power Ground | High-current return path for input/output capacitors and SW node - requires low-inductance connection to CIN/COUT (–) terminals. |
| RT (2) | Oscillator Timing Input | Resistor-to-ground sets switching frequency (f = 3.08×10¹¹/ROSC – 10kΩ); enables precise EMI control and layout-driven frequency tuning. |
| SYNC/MODE (3) | Mode Select / Sync Input | 0–1V = Burst Mode® clamp level; SVIN = forced continuous; external clock (300kHz–4MHz) = synchronization - single-pin multimode control. |
| RUN/SS (4) | Enable / Soft-Start | <0.5V = shutdown (IQ < 1µA); capacitor-to-ground sets soft-start ramp time - prevents inrush and enables sequencing in multi-rail systems. |
| SGND (5) | Signal Ground | Reference for feedback, compensation, and low-noise analog circuitry - must tie to PGND at single point to avoid ground bounce. |
| PVIN (7,14) | Power Input Supply | High-current VIN feed for internal MOSFET drivers - requires local ceramic decoupling (e.g., 10µF X5R) directly to PGND. |
| SW (8,9,12,13) | Switch Node | Connection to inductor - carries high di/dt square wave; layout must minimize loop area to reduce EMI and voltage spikes. |
| VFB (19) | Feedback Input | Monitors resistive divider output; regulates VOUT = 0.8V × (1 + R2/R1) - high-impedance input (0.2µA max) enables high-resistor values for low bias current. |
| ITH (18) | Error Amplifier Output | Controls peak inductor current threshold (0.2V–1.4V); used for loop compensation and burst clamp interaction - critical for stability and light-load behavior. |
| PGOOD (17) | Power Good Monitor | Open-drain output pulled low if VOUT deviates >±7.5% - enables system-level power sequencing and fault detection without external comparators. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® Operation | Reduces quiescent current to 64µA at light loads while maintaining regulated output - eliminates need for external enable/disable logic in battery-critical designs. |
| OPTI-LOOP® Compensation | Allows external RC network on ITH to optimize transient response across wide load and output capacitor ranges - simplifies stability tuning for diverse COUT types (POS-CAP, ceramic, polymer). |
| 100% Duty Cycle Low Dropout | Enables VOUT regulation even when VIN ≈ VOUT - extends usable battery voltage range and improves runtime in single-cell Li-ion systems. |
| Selectable Forced Continuous Mode | Eliminates low-frequency output ripple and EMI sidebands - essential for noise-sensitive analog/RF subsystems co-located on same PCB. |
| Internal Synchronous MOSFETs | 67mΩ P-FET + 50mΩ N-FET replace external Schottky diode - reduces BOM count, footprint, and thermal stress while improving efficiency by ~3–5% at 4A. |
Applications
| Portable Medical Instrumentation | Notebook Computer Core Power |
|---|---|
|
Use Scenario: Compact handheld ultrasound or glucose meter requiring long battery life and stable 1.2V/3A core rail. IC Role / Device Role: Primary point-of-load regulator converting 3.3V system rail to processor core voltage with tight transient response. Use Value: 64µA quiescent current in Burst Mode® extends battery life >2× vs. conventional regulators; 100% duty cycle maintains regulation down to 1.25V input. |
Use Scenario: CPU/GPU voltage rail in ultrabook design with strict EMI limits and thermal envelope constraints. IC Role / Device Role: High-current synchronous buck supplying 0.85V/4A with programmable 2MHz switching to balance inductor size and efficiency. Use Value: Forced continuous mode suppresses subharmonic noise in audio/RF bands; exposed-pad TSSOP enables <38°C/W θJA for passive cooling. |
| Distributed Power Systems | Industrial Portable Test Equipment |
|
Use Scenario: Modular test platform with multiple isolated 3.3V/2.5V/1.8V rails derived from 5V backplane. IC Role / Device Role: Independent PoL regulator per subsystem, synchronized to common clock to eliminate beat frequencies. Use Value: SYNC/MODE pin accepts 300kHz–4MHz external clock - enables deterministic EMI alignment across 12+ rails without filter duplication. |
Use Scenario: Ruggedized field multimeter operating from –40°C to +85°C ambient with cold-temperature startup requirement. IC Role / Device Role: Main 3.3V/4A supply for microcontroller, display, and ADC - rated for –55°C to +125°C (MP grade). Use Value: Guaranteed performance over full MP temperature range eliminates derating; internal overtemperature protection prevents latch-up during thermal transients. |
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 |
|---|---|---|---|
| TPS544B20RJER | 4A, 2.95–16V input, 0.6–5.5V output, 500kHz–2MHz sync range; no Burst Mode®, higher IQ (250µA active) | Wider input range suits 12V intermediate bus; lacks ultra-low-IQ mode for battery standby | Prefer for industrial 12V distributed systems where input voltage exceeds 5.5V; avoid for Li-ion portable use due to higher sleep current. |
| ISL85415IRZ-T7A | 5A, 3–40V input, 0.8–30V output, fixed 600kHz; integrated compensation, no frequency programming or Burst Mode® | Higher voltage rating for automotive/industrial 24V inputs; simpler layout but less flexible for EMI-sensitive designs | Choose for cost-sensitive 24V applications needing basic 5A buck; not suitable for battery-powered devices requiring <100µA quiescent current or frequency tuning. |
Compared with TPS544B20RJER and ISL85415IRZ-T7A, the LTC3414MPFE#PBF uniquely combines ultra-low 64µA quiescent current, –55°C to +125°C MP-grade qualification, and full 300kHz–4MHz programmability - making it the only option among the three qualified for extended-temperature portable instrumentation with multi-day battery life.
Availability
LTC3414MPFE#PBF is available at Aetrix Electronics and suitable for notebook computers, portable medical instrumentation, distributed power systems, and industrial test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3414MPFE#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, 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 LTC3414MPFE#PBF belongs to ADI's Power by Linear™ family of high-efficiency DC/DC converters, engineered specifically for demanding point-of-load applications where thermal robustness, low-noise operation, and extended temperature reliability are critical.
FAQ
What is the guaranteed operating temperature range for the LTC3414MPFE#PBF?
The LTC3414MPFE#PBF is specified and tested over –55°C to +125°C (MP grade), with junction temperature limited to 125°C and thermal resistance θJA = 38°C/W. This rating is validated per Analog Devices' MP-grade qualification standards and includes overtemperature protection that disables switching above 125°C junction temperature. The LTC3414MPFE#PBF maintains ±2% output voltage accuracy across this full range.
How does the SYNC/MODE pin configure Burst Mode® versus forced continuous operation on the LTC3414MPFE#PBF?
On the LTC3414MPFE#PBF, tying SYNC/MODE to SVIN forces continuous conduction mode; applying 0–1V enables Burst Mode® with adjustable burst clamp level; grounding selects pulse-skipping mode. The pin also accepts external 300kHz–4MHz clocks for synchronization. Each configuration alters light-load efficiency, output ripple, and EMI profile - all without changing external components. The LTC3414MPFE#PBF datasheet provides exact voltage thresholds and timing relationships for each mode.
Can the LTC3414MPFE#PBF operate with 100% duty cycle, and what is the minimum input voltage required?
Yes, the LTC3414MPFE#PBF supports true 100% duty cycle operation to maintain regulation when input voltage approaches output voltage - critical for maximizing battery utilization. Minimum input voltage is 2.25V, verified across the full –55°C to +125°C range. At 100% duty cycle, output voltage equals VIN minus drop across the 67mΩ P-channel MOSFET and inductor DCR; the LTC3414MPFE#PBF maintains regulation down to VIN = VOUT + (IOUT × 0.067Ω) + inductor loss.
What is the purpose of the exposed pad on the LTC3414MPFE#PBF, and how must it be connected?
The exposed pad (Pin 21) on the LTC3414MPFE#PBF is electrically connected to SGND and serves as the primary thermal path to the PCB. It must be soldered to a dedicated SGND copper pour with ≥4 thermal vias (0.3mm diameter) to an internal ground plane. Per Analog Devices' FE package guidelines, failure to solder the pad degrades θJA from 38°C/W to >60°C/W and risks thermal shutdown under 4A load. The LTC3414MPFE#PBF datasheet specifies pad dimensions and stencil recommendations for reliable assembly.
Does the LTC3414MPFE#PBF require external compensation, and how is loop stability optimized?
Yes, the LTC3414MPFE#PBF uses OPTI-LOOP® architecture requiring external RC compensation on the ITH pin. Stability is optimized by selecting RC and CC to place the dominant pole and zero based on output capacitor ESR and value - detailed in the LTC3414MPFE#PBF datasheet's "Compensation Design" section. The LTC3414MPFE#PBF supports ceramic, POSCAP, and polymer capacitors; recommended type depends on load transient requirements and ESR target.
LTC3414MPFE#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:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
LTC3414MPFE#PBF FAQ
1.How can I place an order for LTC3414MPFE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3414MPFE#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 LTC3414MPFE#PBF reliable?
The price and inventory of LTC3414MPFE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3414MPFE#PBF is usually 5 days.
3.What payment methods are accepted for LTC3414MPFE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3414MPFE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3414MPFE#PBF?
LTC3414MPFE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3414MPFE#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 LTC3414MPFE#PBF?
For technical support, including LTC3414MPFE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3414MPFE#PBF requirements.
6.How does Aetrix verify that LTC3414MPFE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3414MPFE#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 LTC3414MPFE#PBF meets industry standards.
7.What is the process for return or replacement of LTC3414MPFE#PBF?
All LTC3414MPFE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3414MPFE#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 LTC3414MPFE#PBF part is unused and in its original packaging.
Return procedure for LTC3414MPFE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3414MPFE#PBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
