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Analog Devices Inc. LTC3624EDD-5#TRPBF
- Part No.:
- LTC3624EDD-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC3624EDD-5#TRPBF.pdf
- Description:
- IC REG BUCK 5V 2A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,686
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Product details
Overview
LTC3624EDD-5#TRPBF from Analog Devices (formerly Linear Technology) is a 17V, 2A synchronous step-down regulator in an 8-lead 3mm × 3mm DFN package, delivering a fixed 5V output with ±1% accuracy, 1MHz switching frequency, and 3.5µA quiescent current - ideal for battery-powered instrumentation and emergency radios requiring high light-load efficiency.
For engineers reviewing the LTC3624EDD-5#TRPBF datasheet, LTC3624EDD-5#TRPBF pinout, LTC3624EDD-5#TRPBF application, or LTC3624EDD-5#TRPBF equivalent, key selection criteria include its fixed 5V output, ultralow IQ in Burst Mode, 100% duty-cycle dropout capability, ±7.5% PGOOD window, and compatibility with ceramic input/output capacitors in space-constrained designs.
Technical Context
The LTC3624EDD-5#TRPBF employs a constant-frequency peak current mode architecture with internal compensation and soft-start. It integrates both PMOS high-side and NMOS low-side power switches with RDS(ON) of 200mΩ (top) and 115mΩ (bottom) at VIN = 5V, enabling stable regulation across 2.7V–17V input while maintaining 95% max efficiency at full load.
Its MODE/SYNC pin supports three operating modes: Burst Mode (tied to INTVCC, 3.5µA IQ), pulse-skipping (tied to GND, lowest ripple), and forced continuous (voltage between 1V–VINTVCC–1.2V). The device features overtemperature protection, VIN overvoltage lockout (19V trip), and undervoltage lockout (2.7V enable threshold).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±1% - eliminates external feedback divider, simplifies layout and reduces BOM count. |
| Input Voltage Range | 2.7V to 17V - supports single-cell Li-ion, multi-cell alkaline, and industrial 12V rails without pre-regulation. |
| Max Output Current | 2A continuous - sustains full load under worst-case thermal conditions with proper PCB copper area. |
| Quiescent Current | 3.5µA in Burst Mode - extends battery life in always-on portable devices with intermittent load activity. |
| Switching Frequency | 1MHz ±8% - enables compact 2.2µH inductors and 47µF output capacitance while avoiding AM radio band interference. |
| PGOOD Accuracy | ±7.5% window - provides reliable system-level power sequencing and fault detection without external comparators. |
| Thermal Shutdown | 125°C junction limit - protects against sustained overload or poor heatsinking during transient conditions. |
Pinout & Package
Package: 8-lead (3mm × 3mm) plastic DFN with exposed pad (Pin 9), rated for –40°C to 125°C operating junction temperature. Exposed pad must be soldered to PCB ground for electrical integrity and thermal performance (θJA = 43°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch node connection | Drives external inductor; requires low-inductance layout to minimize EMI and voltage overshoot. |
| VIN (Pins 2, 3) | Main input supply | Accepts 2.7V–17V; bypass with ≥10µF ceramic capacitor placed adjacent to pins for high-frequency decoupling. |
| RUN (Pin 5) | Enable control input | Logic-high (>0.35V) activates regulator; must not float - tie to VIN or microcontroller GPIO for power sequencing. |
| PGOOD (Pin 6) | Power-good indicator | Open-drain output pulled low if VOUT deviates >±7.5%; 32-cycle blanking prevents false triggers during transients. |
| FB (Pin 8) | Feedback reference | Internally connected to 5V output - no external resistor divider required for fixed-output operation. |
| 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 | Tie to INTVCC for Burst Mode (3.5µA IQ), GND for pulse-skipping (low ripple), or external clock for synchronization. |
| GND (Pins 11, 12, Exposed Pad) | Power and signal ground | Primary return path for high-current SW node and low-noise analog circuits; exposed pad is mandatory GND connection. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® operation | Reduces IQ to 3.5µA at light loads while maintaining regulation - critical for multi-year battery life in remote sensors. |
| 100% duty-cycle dropout | Enables regulation down to VIN = VOUT with ultralow IQ - preserves functionality during brownout conditions in portable equipment. |
| Integrated power MOSFETs | Eliminates external high-side/low-side FETs and drivers - reduces component count, layout complexity, and board area by >30%. |
| Internal soft-start | 1ms controlled ramp prevents inrush current and output overshoot - removes need for external timing components. |
| Synchronization capability | Accepts external clock within ±40% of 1MHz (0.6–1.4MHz) - enables noise-sensitive systems to avoid frequency bands or align multiple regulators. |
Applications
| Battery-Powered Instrumentation | Emergency Radios |
|---|---|
Use Scenario: Handheld multimeters and portable oscilloscopes powered by two AA cells (2.4–3.2V) requiring stable 5V for ADCs and microcontrollers. IC Role / Device Role / Timing Role: Primary DC/DC converter delivering regulated 5V from variable battery input with minimal standby drain. Use Value: 3.5µA quiescent current extends shelf life beyond 5 years; 100% duty-cycle operation maintains output as battery depletes to 2.7V. | Use Scenario: Solar-charged emergency communication radios operating across wide ambient temperatures (–20°C to 60°C) with intermittent transmit bursts. IC Role / Device Role / Timing Role: High-efficiency step-down regulator powering RF front-end and baseband processor from 12V sealed lead-acid backup battery. Use Value: 95% peak efficiency minimizes heat rise in sealed enclosure; ±1% VOUT accuracy ensures consistent RF amplifier biasing. |
| General Purpose Step-Down Supplies | Portable Medical Devices |
Use Scenario: Industrial IoT gateways using 12V PoE-derived input to generate clean 5V for USB peripherals and logic circuits. IC Role / Device Role / Timing Role: Compact, low-noise power supply replacing discrete buck controllers and external MOSFETs. Use Value: Fixed 5V output eliminates feedback resistors; 8-lead DFN footprint saves >40% board area versus MSOP alternatives. | Use Scenario: Wearable ECG monitors powered by coin-cell batteries requiring ultra-low IQ and precise analog rail stability. IC Role / Device Role / Timing Role: Main power regulator supplying 5V to analog front-end and Bluetooth SoC with tight ripple and noise requirements. Use Value: Pulse-skipping mode (selected via MODE/SYNC = GND) delivers <20mVPP output ripple - avoids interference with µV-level biopotential signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 3MHz fixed frequency, 0.6V–5.5V adjustable output, 2.05µA IQ, 1.2A max output | Lower current rating and higher switching frequency - suitable only for sub-1A loads with tighter size constraints | Select when board space is more critical than output current and fixed 5V is not required. |
| MAX17503ATJ+T | Adjustable 0.8V–15V output, 2.5A max, 1.2MHz, 12µA IQ, requires external feedback resistors | No fixed 5V variant; higher IQ and larger 16-pin TQFN package - better for programmable supplies needing flexibility | Choose when output voltage must be reconfigured in-system or higher current headroom is needed. |
Compared with TPS62231DRVR and MAX17503ATJ+T, the LTC3624EDD-5#TRPBF offers the unique combination of factory-trimmed 5V output, 2A capability, and industry-leading 3.5µA quiescent current - making it optimal for cost-sensitive, space-constrained, battery-operated systems where fixed-rail simplicity and ultra-low standby power are mandatory.
Availability
LTC3624EDD-5#TRPBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, emergency radios, and general-purpose step-down supplies requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC3624EDD-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 continues to develop high-performance power management ICs with emphasis on efficiency, integration, and reliability.
The LTC3624EDD-5#TRPBF belongs to Linear's monolithic synchronous buck regulator product line, designed specifically for portable and energy-sensitive applications demanding ultralow quiescent current without sacrificing output current capability or regulation accuracy.
FAQ
What is the output voltage tolerance of the LTC3624EDD-5#TRPBF?
The LTC3624EDD-5#TRPBF delivers a fixed 5.0V output with ±1% accuracy over temperature and line/load conditions, verified per Electrical Characteristics table (VOUT = 4.95V to 5.05V at TJ = –40°C to 125°C). This tight tolerance eliminates need for post-regulation trimming and ensures compatibility with 5V-tolerant microcontrollers and peripherals without additional LDOs.
Does the LTC3624EDD-5#TRPBF require external feedback resistors?
No, the LTC3624EDD-5#TRPBF does not require external feedback resistors because it is a fixed-output variant - the FB pin is internally connected to the 5V output. This simplifies design, reduces component count, and improves long-term stability compared to adjustable versions that rely on external resistor tolerances and temperature drift.
How does the MODE/SYNC pin configure operating modes on the LTC3624EDD-5#TRPBF?
The MODE/SYNC pin on the LTC3624EDD-5#TRPBF selects among three modes: tie to INTVCC for Burst Mode (3.5µA IQ), tie to GND for pulse-skipping (lowest ripple), or apply external clock (0.6–1.4MHz) for synchronization. Each configuration directly controls switching behavior without firmware or external logic, enabling hardware-only optimization for efficiency vs. noise trade-offs.
What thermal considerations apply to the LTC3624EDD-5#TRPBF in high-ambient environments?
The LTC3624EDD-5#TRPBF has a maximum junction temperature of 125°C and θJA = 43°C/W in the 8-lead DFN package. To maintain safe operation at 85°C ambient with 2A load, ≥2 cm² of 2-oz copper connected to the exposed pad is required. Thermal derating begins above 85°C ambient, and full 2A output is guaranteed only up to 65°C ambient with standard PCB layout.
Can the LTC3624EDD-5#TRPBF operate with input voltage equal to its 5V output?
Yes, the LTC3624EDD-5#TRPBF supports 100% duty-cycle operation, allowing it to regulate 5V output even when input voltage drops to 5V - critical for battery-powered systems nearing end-of-discharge. In this dropout condition, the top PMOS switch remains continuously on, and quiescent current stays at 3.5µA in Burst Mode, preserving battery reserve.
LTC3624EDD-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)
LTC3624EDD-5#TRPBF FAQ
1.How can I place an order for LTC3624EDD-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3624EDD-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 LTC3624EDD-5#TRPBF reliable?
The price and inventory of LTC3624EDD-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 LTC3624EDD-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3624EDD-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3624EDD-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3624EDD-5#TRPBF?
LTC3624EDD-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3624EDD-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 LTC3624EDD-5#TRPBF?
For technical support, including LTC3624EDD-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3624EDD-5#TRPBF requirements.
6.How does Aetrix verify that LTC3624EDD-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3624EDD-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 LTC3624EDD-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3624EDD-5#TRPBF?
All LTC3624EDD-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3624EDD-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 LTC3624EDD-5#TRPBF part is unused and in its original packaging.
Return procedure for LTC3624EDD-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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