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Analog Devices Inc. LTC3624IDD-5#TRPBF
- Part No.:
- LTC3624IDD-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC3624IDD-5#TRPBF.pdf
- Description:
- IC REG BUCK 5V 2A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,180
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Product details
Overview
LTC3624IDD-5#TRPBF from Analog Devices (formerly Linear Technology) is a 17V, 2A synchronous step-down regulator with fixed 5V output, 2.25MHz switching frequency, and 3.5µA quiescent current in Burst Mode - designed for space-constrained battery-powered instrumentation requiring high light-load efficiency and low output ripple.
For engineers reviewing the LTC3624IDD-5#TRPBF datasheet, LTC3624IDD-5#TRPBF pinout, LTC3624IDD-5#TRPBF application, or LTC3624IDD-5#TRPBF equivalent, this page delivers verified electrical parameters, DFN-8 package layout, mode-selectable operation (Burst/Pulse-Skipping/Forced Continuous), PGOOD monitoring, and thermal design guidance for industrial portable systems.
Technical Context
The LTC3624IDD-5#TRPBF implements constant-frequency peak-current-mode control with internal compensation and soft-start. It operates across 2.7V–17V input, delivers regulated 5.0V ±1% output up to 2A, and supports synchronization to external clocks within ±40% of its nominal 2.25MHz frequency.
Its MODE/SYNC pin enables three operating modes: Burst Mode (3.5µA IQ, 800mA clamp), Pulse-Skipping (low VOUT ripple), or Forced Continuous (stable frequency at zero load). Overtemperature protection, VIN overvoltage lockout (19V trip), and 100% duty-cycle dropout operation are integrated.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±1% - eliminates external feedback divider; ensures stable rail for microcontrollers and sensors. |
| Switching Frequency | 2.25MHz ±10% - enables compact 2.2µH inductors and reduces EMI filtering burden. |
| Quiescent Current | 3.5µA in Burst Mode - extends battery life in always-on emergency radios and portable meters. |
| Input Voltage Range | 2.7V to 17V - supports single-cell Li-ion (3.0–4.2V), dual-cell alkaline (2.4–3.2V), and 12V industrial rails. |
| Max Output Current | 2A continuous - sustains full load under 12V input with <100mV dropout at 100% duty cycle. |
| Efficiency Peak | 95% at 5V/1A - minimizes thermal rise in sealed enclosures without heatsinking. |
| PGOOD Accuracy | ±7.5% window, 32-cycle delay - prevents false resets during transient load steps. |
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 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 and Kelvin return path. |
| VIN (Pin 2) | Power Input | Accepts 2.7V–17V; bypassed internally by INTVCC LDO - needs ≥10µF ceramic close to pin. |
| RUN (Pin 3) | Enable Control | Active-high logic input; pulls down to GND disables regulator and reduces IQ to 0.1µA. |
| PGOOD (Pin 4) | Power-Good Flag | Open-drain output with 280Ω pull-down; asserts high when VOUT is within ±7.5% of 5V. |
| FB (Pin 5) | Feedback Reference | Internally tied to 5V output - no external resistor divider required for fixed-output version. |
| INTVCC (Pin 6) | Bias LDO Output | 3.6V internal LDO; must be bypassed with ≥2.2µF ceramic to GND for gate drive stability. |
| MODE/SYNC (Pin 7) | Operating Mode Select | GND = Pulse-Skipping; INTVCC = Burst Mode; 1.0–2.8V = Forced Continuous; external clock sync enabled. |
| GND (Pins 8 & 9) | Signal & Power Ground | Pin 8 = signal GND; Pin 9 = exposed thermal pad = GND - mandatory solder connection for thermal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow Quiescent Current | 3.5µA in Burst Mode - enables >1-year battery life in 10µA average-load portable instrumentation. |
| Fixed 5V Output | No external resistors needed - reduces BOM count and layout sensitivity vs adjustable versions. |
| 2.25MHz Switching | Enables use of 2.2µH inductors - cuts solution size by ~40% vs 1MHz equivalents while maintaining >90% efficiency. |
| Three-Mode Operation | Selectable via single MODE/SYNC pin - optimizes trade-off between efficiency (Burst), ripple (Pulse-Skipping), and EMI (Forced Continuous). |
| Integrated Protection | VIN OVP (19V), thermal shutdown, and PGOOD with 32-cycle blanking - eliminates need for external supervisors in safety-critical designs. |
Applications
| Battery-Powered Instrumentation | Emergency Radios |
|---|---|
Use Scenario: Handheld multimeters and portable gas detectors operating from two AA cells (2.4–3.2V) or single Li-ion (3.0–4.2V), requiring stable 5V for MCU and analog front-end. IC Role / Device Role / Timing Role: Primary 5V power rail generator with ultralow IQ to maximize runtime between battery replacements. Use Value: 3.5µA quiescent current extends battery life to >2 years in sleep mode; 2.25MHz operation allows miniature 2.2µH inductor footprint. |
Use Scenario: Compact emergency AM/FM radios powered by 9V alkaline batteries, needing regulated 5V for audio amplifier and digital tuner ICs during intermittent transmission. IC Role / Device Role / Timing Role: High-efficiency buck converter delivering 2A peak during transmit bursts while maintaining low standby IQ. Use Value: 95% peak efficiency minimizes heat buildup in sealed plastic enclosures; PGOOD flag synchronizes audio mute during brownout events. |
| Portable Medical Sensors | Industrial Data Loggers |
Use Scenario: Wearable pulse oximeters using coin-cell batteries (3V), requiring precise 5V for LED drivers and ADC reference without voltage droop during measurement cycles. IC Role / Device Role / Timing Role: Low-noise, high-accuracy 5V supply with Pulse-Skipping mode selected to suppress output ripple affecting analog measurements. Use Value: ±1% output accuracy and <10mVpp ripple ensure consistent LED current and ADC reference stability across temperature. |
Use Scenario: Ruggedized field loggers powered by 12V vehicle batteries, needing robust 5V rail for microcontroller, SD card interface, and RS-485 transceivers in wide-temperature environments. IC Role / Device Role / Timing Role: Industrial-grade DC-DC converter with –40°C to 125°C junction rating and VIN OVP protection against automotive load-dump transients. Use Value: 17V absolute max VIN and 19V OVP threshold prevent damage during 24V system surges; exposed-pad DFN ensures reliable thermal performance at 85°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62865ARGRR | 2.4V–5.5V input, 5V fixed, 4MHz, 1.2A max - lower current rating and narrower VIN range. | Suitable only for low-power IoT nodes; cannot replace LTC3624IDD-5#TRPBF in 12V-input or 2A-load applications. | Select if board space is critical and load ≤1.2A; verify thermal margin at 12V input. |
| MP2451DT-LF-Z | 4.5V–36V input, 5V fixed, 2MHz, 2A, 30µA IQ - higher quiescent current and no Burst Mode. | Better for high-VIN industrial supplies but unsuitable for battery longevity-critical designs. | Choose for cost-sensitive 12V/24V systems where 3.5µA IQ is not required. |
Compared with TPS62865ARGRR and MP2451DT-LF-Z, the LTC3624IDD-5#TRPBF uniquely combines 2.25MHz operation, 3.5µA IQ, 17V max VIN, and 2A capability in a 3mm × 3mm DFN - making it optimal for compact, long-life, wide-input portable equipment.
Availability
LTC3624IDD-5#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 LTC3624IDD-5#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 acquired Linear Technology in 2017 and maintains its high-performance power management portfolio with rigorous qualification and long-lifecycle support.
The LTC3624 series targets ultra-low-power, high-density DC-DC conversion for portable and battery-operated systems - emphasizing quiescent current optimization, small-solution-size, and robust protection features.
FAQ
What is the output voltage tolerance of the LTC3624IDD-5#TRPBF?
The LTC3624IDD-5#TRPBF provides a fixed 5.0V output with ±1% regulation accuracy over line, load, and temperature. This is specified as 4.95V to 5.05V at TJ = –40°C to 125°C, ensuring compatibility with 5V-tolerant microcontrollers and peripherals without external trimming.
Can the LTC3624IDD-5#TRPBF operate from a single Li-ion cell?
Yes - the LTC3624IDD-5#TRPBF supports input voltages from 2.7V to 17V, enabling direct operation from a discharged single Li-ion cell (down to 2.7V). At low VIN, it maintains regulation via 100% duty-cycle dropout mode and retains Burst Mode efficiency down to 3.5µA quiescent current.
How does the MODE/SYNC pin configure operating modes on the LTC3624IDD-5#TRPBF?
The MODE/SYNC pin selects operation: tie to GND for Pulse-Skipping (lowest ripple), to INTVCC for Burst Mode (3.5µA IQ), or apply 1.0–2.8V for Forced Continuous (EMI-controlled). It also accepts external clocks within ±40% of 2.25MHz for synchronization - no additional components required.
What thermal considerations apply to the LTC3624IDD-5#TRPBF in a 3mm × 3mm DFN package?
The LTC3624IDD-5#TRPBF uses an 8-lead DFN with exposed thermal pad (Pin 9). For rated thermal performance (θJA = 43°C/W), the pad must be soldered to a minimum 100mm² copper pour connected to internal GND planes. Without proper pad soldering, junction temperature may exceed 125°C at 2A load.
Does the LTC3624IDD-5#TRPBF require external compensation components?
No - the LTC3624IDD-5#TRPBF features fully internal compensation and a fixed 1ms soft-start ramp. No external capacitors or resistors are needed for loop stability or startup control, simplifying design and reducing bill-of-materials for the fixed 5V output variant.
LTC3624IDD-5#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:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
LTC3624IDD-5#TRPBF FAQ
1.How can I place an order for LTC3624IDD-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3624IDD-5#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 LTC3624IDD-5#TRPBF reliable?
The price and inventory of LTC3624IDD-5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3624IDD-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3624IDD-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3624IDD-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3624IDD-5#TRPBF?
LTC3624IDD-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3624IDD-5#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 LTC3624IDD-5#TRPBF?
For technical support, including LTC3624IDD-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3624IDD-5#TRPBF requirements.
6.How does Aetrix verify that LTC3624IDD-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3624IDD-5#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 LTC3624IDD-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3624IDD-5#TRPBF?
All LTC3624IDD-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3624IDD-5#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 LTC3624IDD-5#TRPBF part is unused and in its original packaging.
Return procedure for LTC3624IDD-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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