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Analog Devices Inc. LTC3624EDD-25#TRPBF
- Part No.:
- LTC3624EDD-25#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC3624EDD-25#TRPBF.pdf
- Description:
- IC REG BUCK 5V 2A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,876
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Product details
Overview
LTC3624EDD-25#TRPBF from Analog Devices (formerly Linear Technology) is a 2.25MHz, 5V fixed-output synchronous step-down regulator delivering up to 2A output current from 2.7V–17V input. It features 3.5µA quiescent current in Burst Mode, ±1% output voltage accuracy, and operates in pulse-skipping, forced continuous, or Burst Mode via MODE/SYNC pin control - ideal for battery-powered instrumentation requiring high light-load efficiency and low-noise regulation.
For engineers reviewing the LTC3624EDD-25#TRPBF datasheet, LTC3624EDD-25#TRPBF pinout, LTC3624EDD-25#TRPBF application, or LTC3624EDD-25#TRPBF equivalent, key selection criteria include its 2.25MHz switching frequency, 5V fixed output with 0.6V reference, 8-lead 3mm × 3mm DFN package, and support for external clock synchronization within ±40% of nominal frequency.
Technical Context
The LTC3624EDD-25#TRPBF implements a constant-frequency peak current mode control architecture with internal compensation and 1ms soft-start. Its 2.25MHz oscillator enables compact filter design using small inductors (e.g., 2.2µH) and ceramic capacitors while maintaining stable regulation across 2.7V–17V input range.
It integrates both PMOS high-side and NMOS low-side power switches (RDS(ON) = 200mΩ / 115mΩ at VIN = 5V), supports 100% duty cycle dropout operation, and provides PGOOD monitoring with ±7.5% window and 32-cycle blanking delay - ensuring robust sequencing and fault detection in portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±1% - eliminates external feedback divider; ensures precise rail generation for microcontrollers and sensors. |
| Switching Frequency | 2.25MHz ±10% - enables use of sub-3mm inductors and reduces EMI filtering burden in space-constrained layouts. |
| Quiescent Current | 3.5µA in Burst Mode - extends battery life in always-on emergency radios and IoT endpoints with intermittent load profiles. |
| Input Voltage Range | 2.7V to 17V - supports single-cell Li-ion (2.7–4.2V), 5V USB, and 12V industrial rails without intermediate pre-regulation. |
| Max Output Current | 2A continuous - sufficient to power ARM Cortex-M7 MCUs, display drivers, or dual-band RF modules from a single buck stage. |
| Efficiency Peak | 95% at 5VOUT/800mA - minimizes thermal rise in sealed enclosures and reduces heatsinking requirements. |
| PGOOD Accuracy | ±7.5% window with 32-cycle blanking - prevents false resets during transient load steps while enabling reliable power sequencing. |
Pinout & Package
Package: 8-lead (3mm × 3mm) plastic DFN with exposed thermal pad (Pin 9 = GND). Requires soldering of exposed pad to PCB ground plane for rated thermal performance (θJA = 43°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch node | Connects to inductor; carries high di/dt square wave - requires tight layout with minimal loop area to reduce EMI. |
| VIN (Pins 2,3) | Main input supply | Accepts 2.7V–17V; bypass with ≥10µF ceramic capacitor placed adjacent to pins to suppress high-frequency noise. |
| RUN (Pin 5) | Enable control | Active-high logic input; must be pulled high (>1.0V) to activate regulator - floating state disables output. |
| PGOOD (Pin 6) | Power good indicator | Open-drain output; pulls low when VOUT deviates >±7.5% - used for system reset or supervisor IC interfacing. |
| FB (Pin 8) | Feedback reference | Internally tied to 5V output (fixed version); no external resistor divider required - simplifies layout and improves accuracy. |
| INTVCC (Pin 9) | Internal LDO output | 3.6V regulated supply for gate drivers; bypass with ≥2.2µF ceramic capacitor to GND for stability. |
| MODE/SYNC (Pin 10) | Operating mode select | Ground = pulse-skipping (low ripple); INTVCC = Burst Mode (low IQ); 1V–2.8V = forced continuous - also accepts external clock for synchronization. |
| GND (Pins 11,12 + Exposed Pad) | Signal and power ground | Low-impedance return path for SW, VIN, and INTVCC; exposed pad must be soldered to PCB ground for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 3.5µA in Burst Mode enables >1-year battery life in 10µA average-load applications like smoke detectors. |
| 2.25MHz fixed-frequency operation | Reduces inductor size by >2× vs 1MHz parts - e.g., 2.2µH suffices for 5V/2A, easing PCB area constraints. |
| Three selectable operating modes | Mode pin configures pulse-skipping (low ripple), Burst Mode (high efficiency), or forced continuous (EMI-controlled) - no external components needed. |
| Integrated power MOSFETs | On-resistances of 200mΩ (PMOS) and 115mΩ (NMOS) eliminate external FETs and gate drivers - reducing BOM count and layout complexity. |
| 100% duty cycle capability | Maintains regulation down to VIN = VOUT + dropout voltage - critical for Li-ion end-of-discharge operation in portable medical devices. |
Applications
| Battery-Powered Instrumentation | Emergency Radios |
|---|---|
Use Scenario: Handheld multimeters and portable oscilloscopes operating from 2xAA or Li-ion batteries with variable load profiles (idle vs active measurement). IC Role / Device Role / Timing Role: Primary 5V system rail generator with dynamic mode switching to minimize self-consumption during sleep. Use Value: 3.5µA quiescent current extends battery runtime by >3× versus comparable 1MHz regulators; 2.25MHz switching avoids audible noise in sensitive analog front-ends. | Use Scenario: Compact emergency AM/FM/NOAA radios powered by alkaline or rechargeable batteries, requiring instant-on capability and long shelf life. IC Role / Device Role / Timing Role: Fixed 5V supply for RF receiver ICs, microcontroller, and audio amplifier - must maintain regulation during battery voltage sag. Use Value: 100% duty cycle operation sustains 5V output down to 5.2V input; ±1% accuracy ensures stable ADC references and crystal oscillator biasing. |
| Portable Medical Sensors | Industrial Control Modules |
Use Scenario: Wearable pulse oximeters and glucose monitors with Bluetooth LE connectivity, cycling between sensor acquisition (200mA) and BLE transmit bursts (500mA). IC Role / Device Role / Timing Role: High-efficiency 5V buck converter feeding MCU and analog signal chain - must respond rapidly to load transients without overshoot. Use Value: Peak current limit of 3A and current-mode control deliver <5µs recovery from 0→2A load steps; soft-start prevents inrush into large output capacitance. | Use Scenario: DIN-rail mounted PLC I/O modules powered from 12–24V DC field supplies, requiring clean 5V for logic and isolated communication interfaces. IC Role / Device Role / Timing Role: Point-of-load regulator converting unregulated industrial rail to stable 5V - must withstand voltage transients and operate over wide temperature range. Use Value: VIN OVP (19V) and UVLO (2.7V) protect against 24V surges and brownouts; –40°C to 125°C rating ensures reliability in enclosed cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62865ARGTR | 2.5V–5.5V input range; 5V fixed output; 4MHz switching; 1.2µA IQ in DCM | Lower input voltage ceiling limits use to single-cell Li-ion only - unsuitable for 12V industrial inputs. | Select when ultra-low IQ (<2µA) and smallest possible inductor (0.47µH) are prioritized over wide VIN range. |
| MP2451DT-LF-Z | 4.5V–18V input; 5V fixed output; 2MHz switching; 260µA IQ in skip mode | Higher quiescent current degrades battery life in always-on applications; no Burst Mode or sync capability. | Select for cost-sensitive industrial supplies where 260µA IQ is acceptable and external clock sync is not required. |
Compared with TPS62865ARGTR and MP2451DT-LF-Z, the LTC3624EDD-25#TRPBF uniquely balances ultra-low IQ (3.5µA), wide 2.7V–17V input, 2.25MHz operation, and full mode flexibility - making it optimal for portable equipment needing both long battery life and robust input voltage handling.
Availability
LTC3624EDD-25#TRPBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, emergency radios, and portable medical sensors requiring stable component supply with guaranteed long-term availability.
Supply support for LTC3624EDD-25#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LTC3624 product line delivers ultralow-IQ synchronous buck regulators optimized for battery longevity and compact footprint in portable and energy-sensitive applications - with fixed and adjustable versions spanning 1MHz and 2.25MHz frequencies.
FAQ
What is the output voltage tolerance of the LTC3624EDD-25#TRPBF?
The LTC3624EDD-25#TRPBF provides a fixed 5.0V output with ±1% accuracy over temperature and line/load conditions. This is achieved via an internal 0.6V reference and precision trimming - eliminating external resistor tolerances and ensuring consistent rail generation for sensitive analog circuits and microcontrollers without requiring calibration.
Does the LTC3624EDD-25#TRPBF require an external feedback resistor network?
No, the LTC3624EDD-25#TRPBF does not require an external feedback resistor network. As a fixed 5V output variant, the FB pin is internally connected to the output, removing the need for external dividers - simplifying layout, improving accuracy, and reducing component count compared to adjustable versions like the LTC3624EDD-2#TRPBF.
How does the MODE/SYNC pin configure operating modes on the LTC3624EDD-25#TRPBF?
The MODE/SYNC pin on the LTC3624EDD-25#TRPBF selects among three modes: grounding it enables pulse-skipping (lowest output ripple), tying it to INTVCC activates Burst Mode (3.5µA IQ), and applying 1V–2.8V sets forced continuous mode. It also accepts external clocks for synchronization - all without additional components, giving designers flexible trade-offs between efficiency, noise, and EMI.
What thermal considerations apply to the LTC3624EDD-25#TRPBF in a 2A application?
In a 2A, 5V output application with 12V input, the LTC3624EDD-25#TRPBF dissipates ~0.5W. With θJA = 43°C/W and 25°C ambient, junction temperature rises ~22°C - well within its 125°C max rating. Effective thermal design requires soldering the exposed pad to ≥1cm² copper pour and using ≥2 thermal vias to inner ground planes to maintain reliability under continuous load.
Can the LTC3624EDD-25#TRPBF synchronize to an external clock, and what is the capture range?
Yes, the LTC3624EDD-25#TRPBF can synchronize to an external clock applied to the MODE/SYNC pin. Its capture range is ±40% of its nominal 2.25MHz frequency - i.e., 1.35MHz to 3.15MHz - allowing alignment with system clocks or spread-spectrum sources to reduce EMI peaks. Sync engagement occurs within 2–3 cycles, and loss of sync is detected within ~2µs.
LTC3624EDD-25#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 2A
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
LTC3624EDD-25#TRPBF FAQ
1.How can I place an order for LTC3624EDD-25#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3624EDD-25#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 LTC3624EDD-25#TRPBF reliable?
The price and inventory of LTC3624EDD-25#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3624EDD-25#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3624EDD-25#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3624EDD-25#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3624EDD-25#TRPBF?
LTC3624EDD-25#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3624EDD-25#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 LTC3624EDD-25#TRPBF?
For technical support, including LTC3624EDD-25#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3624EDD-25#TRPBF requirements.
6.How does Aetrix verify that LTC3624EDD-25#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3624EDD-25#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 LTC3624EDD-25#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3624EDD-25#TRPBF?
All LTC3624EDD-25#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3624EDD-25#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 LTC3624EDD-25#TRPBF part is unused and in its original packaging.
Return procedure for LTC3624EDD-25#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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