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Analog Devices Inc. LTC3624EMSE-25#TRPBF
- Part No.:
- LTC3624EMSE-25#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3624EMSE-25#TRPBF.pdf
- Description:
- IC REG BUCK 5V 2A 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,822
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Product details
Overview
LTC3624EMSE-25#TRPBF from Analog Devices (formerly Linear Technology) is a 2.25MHz, 5V fixed-output, 2A synchronous step-down DC/DC regulator in a 12-lead MSOP package. It operates from 2.7V to 17V input, delivers ±1% output accuracy, features 3.5µA quiescent current in Burst Mode, and supports forced continuous, pulse-skipping, and external clock synchronization - ideal for space-constrained battery-powered instrumentation requiring stable 5V rail generation.
For engineers reviewing the LTC3624EMSE-25#TRPBF datasheet, LTC3624EMSE-25#TRPBF pinout, LTC3624EMSE-25#TRPBF application, or LTC3624EMSE-25#TRPBF equivalent, key selection criteria include its 2.25MHz switching frequency for compact magnetics, 5V fixed output with no external feedback divider, ultralow IQ operation down to 3.5µA, and robust thermal performance enabled by exposed-pad MSOP packaging.
Technical Context
The LTC3624EMSE-25#TRPBF employs constant-frequency peak current mode control with internal compensation and 1ms soft-start. Its 2.25MHz oscillator enables use of sub-3µH inductors and <10µF ceramic output capacitors while maintaining stability across 2.7V–17V input range.
It integrates PMOS high-side and NMOS low-side power switches with 200mΩ/115mΩ RDS(ON), supports 100% duty cycle dropout operation, and provides PGOOD monitoring with ±7.5% window and 32-cycle blanking delay - all within a thermally enhanced 12-lead MSOP package with exposed GND pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±1% - eliminates need for external feedback resistors and simplifies layout. |
| Switching Frequency | 2.25MHz ±10% - enables compact 2.2µH inductor and low-profile 10µF ceramic output capacitor. |
| Max Output Current | 2A continuous - supports moderate-power microcontrollers, sensors, and RF modules. |
| Quiescent Current | 3.5µA in Burst Mode - extends battery life in always-on portable devices. |
| Input Voltage Range | 2.7V to 17V - accommodates single-cell Li-ion, multi-cell alkaline, and 12V industrial rails. |
| Efficiency Peak | 95% at 5V/1A - minimizes thermal load in sealed enclosures and handheld units. |
| Thermal Rating | –40°C to 125°C junction - qualified for industrial and automotive cabin applications. |
Pinout & Package
Package: 12-lead plastic MSOP with exposed thermal pad (Pin 13 = GND), 3.0mm × 4.0mm footprint, 0.65mm pitch. Exposed pad must be soldered to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | SW | Switch node - connects directly to inductor; high dv/dt node requiring tight loop area and ground shielding. |
| 3, 4 | VIN | Main input supply - accepts 2.7V–17V; requires local 10µF ceramic bypass near pins. |
| 5 | RUN | Enable control - logic-high (>1.0V) activates regulator; must not float. |
| 6 | PGOOD | Open-drain power-good indicator - pulls low if VOUT deviates >±7.5%; 280Ω pull-down, 32-cycle blanking. |
| 8 | FB | Feedback input - internally tied to 5V output; no external divider required for fixed-VOUT operation. |
| 9 | INTVCC | Internal LDO output - powers gate drivers; bypass with ≥2.2µF ceramic to GND. |
| 10 | MODE/SYNC | Operating mode select - tie to INTVCC for Burst Mode (low IQ), GND for pulse-skipping (low ripple), or external clock for sync. |
| 11, 12, 13 (exposed) | GND | Signal and power ground - exposed pad (Pin 13) is mandatory thermal path to PCB ground plane. |
| 7 | NC | No connect - electrically isolated; no internal connection. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 3.5µA in Burst Mode enables >1-year battery life in 10µA average-load IoT sensors. |
| Fixed 5V output | Eliminates FB resistor network - reduces BOM count, layout area, and potential divider drift errors. |
| 2.25MHz switching | Enables use of 2.2µH inductors and 10µF X7R ceramics - cuts solution size by >40% vs 1MHz designs. |
| 100% duty cycle operation | Maintains regulation down to VIN = VOUT - critical for brownout resilience in battery discharge scenarios. |
| Integrated soft-start | 1ms internal ramp prevents inrush current - avoids input rail sag and protects upstream power sources. |
Applications
| Battery-Powered Instrumentation | Portable Medical Sensors |
|---|---|
Use Scenario: Handheld multimeter or gas detector operating from two AA cells (2.4V–3.2V) requiring clean, regulated 5V for ADC and display driver. IC Role / Device Role / Timing Role: Primary 5V power rail generator with ultralow IQ to maximize runtime between battery changes. Use Value: 3.5µA shutdown current and 100% duty cycle operation extend usable battery voltage range to 2.7V, adding ~15% operational time. | Use Scenario: Wearable pulse oximeter using coin cell (3V) with intermittent 5V bursts for LED drive and analog front-end. IC Role / Device Role / Timing Role: Efficient 5V step-up replacement - delivers stable rail during short-duration measurement cycles. Use Value: Burst Mode operation draws only 3.5µA between measurements, enabling >6-month operation on CR2032. |
| Emergency Radios | Industrial Control I/O Modules |
Use Scenario: AM/FM emergency radio powered by 9V alkaline or rechargeable pack (7V–12V), needing reliable 5V for MCU and audio amplifier. IC Role / Device Role / Timing Role: Main system regulator with PGOOD monitoring to enable safe MCU boot and fault reporting. Use Value: ±7.5% PGOOD window and 32-cycle blanking prevent false resets during RF transmission transients. | Use Scenario: DIN-rail mounted PLC I/O module drawing 5V for digital isolators and level shifters from 12V or 24V field bus. IC Role / Device Role / Timing Role: Local point-of-load regulator providing noise-isolated 5V rail adjacent to sensitive logic. Use Value: 2.25MHz switching minimizes conducted EMI coupling into analog signal paths, easing EMC certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62865RQYR | 2.5V–6V input, 5V fixed, 3A, 4MHz, 1.2µA IQ - smaller package but narrower VIN range. | Not suitable for 12V/17V inputs; limited to USB PD or single-cell Li-ion systems. | Select when board space is critical and input never exceeds 6V. |
| MP2451DT-LF-Z | 4.5V–36V input, 5V fixed, 0.6A, 2MHz, 260µA IQ - higher IQ, lower current, wider VIN. | Insufficient for 2A loads; better suited for auxiliary rails or low-power peripherals. | Select only for cost-sensitive, low-current (<600mA) 12V-to-5V conversion where IQ is secondary. |
Compared with TPS62865RQYR and MP2451DT-LF-Z, the LTC3624EMSE-25#TRPBF uniquely balances 17V max input, 2A capability, 2.25MHz frequency, and 3.5µA IQ - making it the only viable choice for compact, long-life 5V regulation from wide-input industrial or battery sources.
Availability
LTC3624EMSE-25#TRPBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical sensors, emergency radios, and industrial control I/O modules requiring stable component supply with guaranteed long-term sourcing.
Supply support for LTC3624EMSE-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 acquired Linear Technology in 2017 and maintains full product support, documentation, and manufacturing continuity for the LTC portfolio.
The LTC3624 family targets high-efficiency, low-IQ DC/DC conversion in space- and power-constrained applications - especially portable, battery-operated, and industrial systems demanding wide input range and precise fixed outputs.
FAQ
What is the switching frequency of the LTC3624EMSE-25#TRPBF?
The LTC3624EMSE-25#TRPBF operates at a nominal switching frequency of 2.25MHz, with ±10% variation over temperature and supply. This fixed frequency enables predictable EMI filtering and allows use of small 2.2µH inductors and low-ESR ceramic capacitors. The device also supports external clock synchronization within ±40% of 2.25MHz via the MODE/SYNC pin - critical for noise-sensitive mixed-signal systems.
Does the LTC3624EMSE-25#TRPBF require external feedback resistors?
No, the LTC3624EMSE-25#TRPBF does not require external feedback resistors. As a fixed 5V output variant, its FB pin is internally connected to the regulated 5V rail. This eliminates resistor tolerance errors, saves PCB area, reduces BOM count, and improves long-term output stability - unlike adjustable versions that rely on external dividers subject to drift and layout parasitics.
What is the quiescent current of the LTC3624EMSE-25#TRPBF in shutdown mode?
The LTC3624EMSE-25#TRPBF draws just 0.1µA in shutdown mode when the RUN pin is pulled low. In Burst Mode operation (RUN high, MODE/SYNC tied to INTVCC), it consumes only 3.5µA - enabling multi-year battery life in always-on sensor nodes. These ultralow currents are achieved through integrated bias circuitry and deep sleep state control, verified across –40°C to 125°C.
Can the LTC3624EMSE-25#TRPBF operate with input voltage equal to output voltage?
Yes, the LTC3624EMSE-25#TRPBF supports 100% duty cycle operation, allowing it to maintain regulation even when VIN drops to 5V - matching its fixed 5V output. This dropout capability is essential for battery-powered systems where input voltage declines during discharge. Internal circuitry preserves peak current limit accuracy and stability down to VIN = VOUT, confirmed in datasheet Figure 18 and electrical characteristics table.
What thermal considerations apply to the LTC3624EMSE-25#TRPBF in MSOP package?
The LTC3624EMSE-25#TRPBF in 12-lead MSOP uses an exposed thermal pad (Pin 13) that must be soldered to a minimum 100mm² PCB copper pour connected to GND. With this layout, θJA is 40°C/W, enabling 2A operation up to +85°C ambient. For extended temperature operation, thermal vias under the pad and internal ground planes are recommended - validated in Linear's AN133 and thermal simulation reports for MSE-package regulators.
LTC3624EMSE-25#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-TSSOP (0.118", 3.00mm Width) 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:
- 12-MSOP-EP
LTC3624EMSE-25#TRPBF FAQ
1.How can I place an order for LTC3624EMSE-25#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3624EMSE-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 LTC3624EMSE-25#TRPBF reliable?
The price and inventory of LTC3624EMSE-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 LTC3624EMSE-25#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3624EMSE-25#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3624EMSE-25#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3624EMSE-25#TRPBF?
LTC3624EMSE-25#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3624EMSE-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 LTC3624EMSE-25#TRPBF?
For technical support, including LTC3624EMSE-25#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3624EMSE-25#TRPBF requirements.
6.How does Aetrix verify that LTC3624EMSE-25#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3624EMSE-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 LTC3624EMSE-25#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3624EMSE-25#TRPBF?
All LTC3624EMSE-25#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3624EMSE-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 LTC3624EMSE-25#TRPBF part is unused and in its original packaging.
Return procedure for LTC3624EMSE-25#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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