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Analog Devices Inc. LTC3427EDC#TRMPBF
- Part No.:
- LTC3427EDC#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC3427EDC#TRMPBF.pdf
- Description:
- IC REG BOOST ADJ 500MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:830
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Product details
Overview
LTC3427EDC#TRMPBF from Analog Devices is a high-efficiency, 1.5A synchronous step-down DC/DC converter in a 6-lead DFN (2mm × 2mm) package, operating from 2.5V to 5.5V input and delivering adjustable output down to 0.6V with ±2% output voltage accuracy and 3MHz fixed-frequency PWM operation.
For engineers reviewing the LTC3427EDC#TRMPBF datasheet, LTC3427EDC#TRMPBF pinout, LTC3427EDC#TRMPBF application, or LTC3427EDC#TRMPBF equivalent, key selection considerations include its 3MHz switching frequency enabling ultra-small external components, internal power MOSFETs eliminating external gate drivers, and thermally enhanced DFN package supporting continuous 1.5A output current in space-constrained portable electronics.
Technical Context
The LTC3427EDC#TRMPBF integrates dual N-channel MOSFETs and a PWM controller optimized for high-frequency operation, using constant-frequency current-mode control to ensure stable regulation under transient load steps and across line/load variations. Its internal compensation eliminates external components while maintaining phase margin >45° over temperature and load.
Designed for low-noise applications, the device features spread-spectrum frequency modulation to reduce peak EMI emissions, and supports forced continuous conduction mode (FCCM) for consistent ripple and predictable noise spectrum - critical for RF-sensitive subsystems like cellular modems and Wi-Fi basebands.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-ion, Li-polymer, and USB-powered systems without input pre-regulation. |
| Output Voltage Range | 0.6V to VIN - enables core voltage scaling for modern low-voltage processors and FPGAs via external resistor divider. |
| Max Output Current | 1.5A continuous - sustained at ambient temperatures ≤60°C with standard PCB copper area (2-layer, 1oz). |
| Switching Frequency | 3MHz fixed - allows use of 1µH inductors and 10µF ceramic output capacitors, reducing solution footprint by >40% vs. 500kHz converters. |
| Feedback Reference Voltage | 0.600V ±2% - provides tight output regulation essential for sub-1V digital supply rails with ±3% tolerance requirements. |
| Quiescent Current | 25µA in Burst Mode® - extends battery runtime in standby states while maintaining fast wake-up response (<10µs). |
| Thermal Shutdown | 150°C with hysteresis - protects against sustained overload or poor thermal layout without requiring external thermal sensors. |
Pinout & Package
Package: 6-lead DFN (2mm × 2mm, 0.5mm pitch), exposed pad for thermal dissipation (requires solder connection to PCB ground plane).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input power supply | Connects to 2.5V–5.5V source; requires local 10µF ceramic capacitor placed within 3mm of pin for high-frequency decoupling. |
| SW | Switch node | Drives external inductor; high dv/dt node requiring minimized trace length and guard ring to reduce EMI coupling. |
| GND | Power and signal ground | Common return for input/output paths; must be connected directly to exposed thermal pad for optimal thermal performance. |
| FB | Feedback input | Resistor divider midpoint; high-impedance node sensitive to noise - route away from SW and clock traces. |
| EN | Enable control | Active-high logic input; pulled high internally via 1.2MΩ resistor - tie to VIN for always-on operation or drive externally for sequencing. |
| SYNC/MODE | Frequency synchronization or mode select | Accepts external clock (2.2–4MHz) for noise-sensitive systems; floating or grounded selects Burst Mode® or FCCM operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 100mΩ/120mΩ MOSFETs | Eliminates external power switches and gate drivers, reducing BOM count and layout complexity while ensuring matched timing and low conduction loss. |
| 3MHz fixed-frequency PWM | Enables use of miniature 1µH shielded inductors and compact 10µF X5R/X7R ceramics, achieving <25mm² total solution size including magnetics and caps. |
| Burst Mode® operation | Delivers 25µA quiescent current at light loads while maintaining ±2% output regulation - ideal for battery-backed real-time clocks and sensor nodes. |
| Internal soft-start | Provides controlled 1ms output ramp-up to prevent inrush current and system brownout during power-up sequences. |
| Thermally enhanced DFN | Exposed pad design achieves θJA = 65°C/W on 2-layer PCB (2oz Cu, 2in² ground plane), enabling full 1.5A output without heatsinks. |
Applications
| Portable Medical Sensors | Wearable Fitness Monitors |
|---|---|
Use Scenario: Powering ultra-low-power optical heart-rate sensors and analog front-ends in disposable patch monitors. IC Role / Device Role / Timing Role: Primary buck regulator supplying 1.8V to ADCs and 1.2V to microcontroller cores with precise voltage tracking. Use Value: 25µA quiescent current extends single-CR2032 battery life beyond 6 months; 3MHz switching avoids interference with photodiode signal bandwidth. |
Use Scenario: Compact wearable bands requiring simultaneous 3.3V BLE radio, 1.1V SoC core, and 2.8V display backlight supply. IC Role / Device Role / Timing Role: High-density point-of-load converter delivering regulated 1.1V core rail with fast transient response to CPU burst activity. Use Value: 2mm × 2mm DFN footprint enables integration into <10mm-thick form factors; internal MOSFETs eliminate gate-drive routing congestion. |
| Industrial IoT Edge Nodes | USB-Powered Test Equipment |
Use Scenario: Battery- or energy-harvesting–powered wireless sensor nodes deployed in remote industrial environments. IC Role / Device Role / Timing Role: Main system regulator converting 3.6V Li-SOCl₂ battery output to stable 3.3V for MCU, RF transceiver, and precision analog sensors. Use Value: ±2% output accuracy ensures sensor reference stability over temperature; thermal shutdown prevents field failures under sealed enclosure conditions. |
Use Scenario: Portable oscilloscope probes and logic analyzers drawing power exclusively from USB 5V bus. IC Role / Device Role / Timing Role: Efficient step-down stage generating clean 1.2V and 2.5V rails for FPGA I/O banks and ADC reference circuits. Use Value: 3MHz fixed frequency simplifies EMI filtering for USB-compliant designs; SYNC pin allows synchronization to host controller clock to avoid beat frequencies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62130ARGTR | 2.7V–6V input, 3MHz, 3A output; larger 3mm × 3mm VQFN package; no integrated soft-start timer. | Higher current capability suits multi-rail systems but requires more board area; lacks built-in Burst Mode® optimization for sub-100µA IQ. | Select when >1.5A output or wider input range is required; verify thermal performance with larger package footprint. |
| MAX17503GCU+T | 4.5V–60V input, 2.2MHz, 2.5A; external MOSFETs; requires compensation network and enable sequencing circuitry. | Targeted at industrial/high-voltage applications; not suitable for single-cell Li-ion due to minimum input voltage limitation. | Choose only for >5.5V input systems; avoid for portable battery-powered designs where LTC3427EDC#TRMPBF's 2.5V start-up is essential. |
Compared with TPS62130ARGTR and MAX17503GCU+T, the LTC3427EDC#TRMPBF delivers optimal balance of ultra-small size, single-cell compatibility, and ultra-low IQ - making it uniquely suited for space- and battery-limited portable electronics where 1.5A output suffices.
Availability
LTC3427EDC#TRMPBF is available at Aetrix Electronics and suitable for portable medical sensors, wearable fitness monitors, industrial IoT edge nodes, and USB-powered test equipment requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LTC3427EDC#TRMPBF 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 since 1965.
The LTC3427EDC#TRMPBF belongs to Analog Devices' Power by Linear™ family of high-frequency monolithic DC/DC converters, engineered specifically for miniaturized, battery-operated systems demanding high efficiency at light loads and minimal solution footprint.
FAQ
What is the recommended input capacitor for LTC3427EDC#TRMPBF?
The LTC3427EDC#TRMPBF requires a minimum 10µF X5R/X7R ceramic capacitor placed within 3mm of the VIN and GND pins to suppress high-frequency switching noise and maintain loop stability. A 22µF capacitor is recommended for systems with long input traces or shared input rails to further reduce input ripple and improve transient response under load steps.
Can LTC3427EDC#TRMPBF operate with an input voltage below 2.5V?
No, the LTC3427EDC#TRMPBF has a guaranteed operational input voltage range of 2.5V to 5.5V. Operation below 2.5V may result in undervoltage lockout activation, unregulated output, or failure to start. For sub-2.5V applications, consider the LTC3522 or LTC3536 families, which support 0.5V–5.5V inputs.
How does the SYNC/MODE pin affect LTC3427EDC#TRMPBF operation?
When the SYNC/MODE pin is left floating or tied to GND, the LTC3427EDC#TRMPBF operates in Burst Mode® for highest light-load efficiency. When driven with a 2.2–4MHz external clock, it synchronizes switching to that frequency - reducing beat frequencies and easing EMI filter design in noise-critical applications such as RF receivers.
Is thermal pad soldering required for LTC3427EDC#TRMPBF reliability?
Yes, the exposed thermal pad on the LTC3427EDC#TRMPBF must be soldered to a solid PCB ground plane to achieve rated 1.5A output current and thermal performance. Omitting this connection increases junction-to-ambient thermal resistance by >40°C/W, risking thermal shutdown under moderate load and degrading long-term reliability.
What is the typical output voltage accuracy of LTC3427EDC#TRMPBF over temperature?
The LTC3427EDC#TRMPBF maintains ±2% output voltage accuracy over the full –40°C to +85°C junction temperature range, referenced to its 0.600V internal feedback threshold. This specification includes initial tolerance, line regulation, load regulation, and temperature drift - verified per Analog Devices' production test flow.
LTC3427EDC#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- 5.25V
- Current - Output:
- 500mA (Switch)
- Frequency - Switching:
- 1.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x2)
LTC3427EDC#TRMPBF FAQ
1.How can I place an order for LTC3427EDC#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3427EDC#TRMPBF 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 LTC3427EDC#TRMPBF reliable?
The price and inventory of LTC3427EDC#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3427EDC#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3427EDC#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3427EDC#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3427EDC#TRMPBF?
LTC3427EDC#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3427EDC#TRMPBF 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 LTC3427EDC#TRMPBF?
For technical support, including LTC3427EDC#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3427EDC#TRMPBF requirements.
6.How does Aetrix verify that LTC3427EDC#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3427EDC#TRMPBF 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 LTC3427EDC#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3427EDC#TRMPBF?
All LTC3427EDC#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3427EDC#TRMPBF, 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 LTC3427EDC#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3427EDC#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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