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Analog Devices Inc. LTC3624EMSE-5#TRPBF
- Part No.:
- LTC3624EMSE-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3624EMSE-5#TRPBF.pdf
- Description:
- IC REG BUCK 5V 2A 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,439
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Product details
Overview
LTC3624EMSE-5#TRPBF from Analog Devices (formerly Linear Technology) is a 2.25MHz, 5V fixed-output synchronous step-down regulator delivering up to 2A from 2.7V–17V input. It features 3.5µA quiescent current in Burst Mode, ±1% output voltage accuracy, and operates in forced continuous, pulse-skipping, or Burst Mode® for efficiency/ripple trade-offs - deployed in portable instrumentation and emergency radios requiring stable low-power 5V rails.
For engineers reviewing the LTC3624EMSE-5#TRPBF datasheet, LTC3624EMSE-5#TRPBF pinout, LTC3624EMSE-5#TRPBF application, or LTC3624EMSE-5#TRPBF equivalent, key selection criteria include its 2.25MHz switching frequency, 5V fixed output with no external feedback divider, 12-lead MSOP package with exposed thermal pad, and support for external clock synchronization within ±40% of nominal frequency.
Technical Context
The LTC3624EMSE-5#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., 3.3µH) and ceramic capacitors while maintaining stability across 2.7V–17V input range.
It integrates complementary PMOS/NMOS power switches with 200mΩ (top) and 115mΩ (bottom) on-resistances at VIN = 5V, supports 100% duty-cycle dropout operation, and includes overtemperature protection, VIN overvoltage lockout (19V), and VINTVCC undervoltage lockout (2.6V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±1% - eliminates need for external resistor divider; simplifies layout and improves accuracy vs adjustable versions. |
| Switching Frequency | 2.25MHz ±20% - enables use of sub-4mm inductors and reduces output capacitor size; supports sync to external clock ±40%. |
| Max Output Current | 2A continuous - sufficient for powering microcontrollers, sensors, and RF modules in space-constrained portable systems. |
| Quiescent Current | 3.5µA in Burst Mode - extends battery life in always-on monitoring devices; drops to 0.1µA in shutdown. |
| Input Voltage Range | 2.7V to 17V - accommodates single-cell Li-ion (3.0–4.2V), dual-cell alkaline (2.7–3.6V), and 12V industrial rails. |
| Efficiency Peak | 95% at 1A, VIN = 12V → VOUT = 5V - minimizes thermal load in sealed enclosures; maintained down to 10mA via Burst Mode. |
| Thermal Performance | θJA = 40°C/W, θJC = 10°C/W - requires exposed pad soldered to PCB ground plane for rated 125°C junction operation. |
Pinout & Package
Package: 12-lead plastic MSOP with exposed thermal pad (Pin 13 = GND). Requires soldering of exposed pad to PCB ground for electrical integrity and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | SW | Switch node - connects to inductor; carries high di/dt square wave; must be routed short and wide to minimize EMI. |
| 3, 4 | VIN | Main input supply - accepts 2.7V–17V; bypass with ≥10µF ceramic capacitor placed adjacent to Pin 3/4. |
| 5 | RUN | Enable control - logic-high (>0.35V) enables regulation; tie to VIN or microcontroller GPIO; never float. |
| 6 | PGOOD | Open-drain power-good indicator - pulled low if VOUT deviates >±7.5%; 32-cycle blanking prevents transient false trips. |
| 8 | FB | Feedback input - internally connected to 5V output; no external divider required for fixed-output operation. |
| 9 | INTVCC | Internal LDO output - powers gate drivers; bypass with ≥2.2µF ceramic to GND; not user-accessible for external loads. |
| 10 | MODE/SYNC | Operating mode select/sync input - tie to INTVCC for Burst Mode, GND for pulse-skipping, or external clock for forced continuous sync. |
| 11, 12, 13 | GND | Signal and power ground - Pin 13 is exposed thermal pad; must be soldered to solid PCB ground plane for thermal and EMI control. |
| 7 | NC | No connect - no internal connection; leave unconnected or tie to GND per layout best practice. |
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. |
| 2.25MHz Fixed Switching | Enables <3mm × 3mm inductor footprint and low-profile 10µF–47µF ceramic output caps - ideal for ultra-thin portable designs. |
| 100% Duty-Cycle Capability | Supports dropout operation down to VIN = VOUT with ultralow IQ - sustains 5V output during brownout from depleting Li-ion cells. |
| Integrated Power Switches | Eliminates external MOSFETs and drivers - reduces BOM count by ≥4 components and simplifies thermal design. |
| Internal Soft-Start | 1ms monotonic ramp prevents inrush current and output overshoot - removes need for external soft-start circuitry. |
Applications
| Portable Medical Sensors | Emergency Communication Radios |
|---|---|
Use Scenario: Wearable pulse oximeter operating from coin-cell or single Li-ion battery with multi-week runtime requirement. IC Role / Device Role / Timing Role: Primary 5V system rail generator; regulates from 3.0–4.2V battery to stable 5V for analog front-end and BLE SoC. Use Value: 3.5µA quiescent current in Burst Mode extends battery life beyond 18 months; 2.25MHz switching avoids audible noise in sensitive analog circuits. | Use Scenario: Handheld emergency radio powered by AA batteries, requiring reliable 5V supply under cold-temperature and low-VIN conditions. IC Role / Device Role / Timing Role: Main DC-DC converter supplying 5V to RF power amplifier, MCU, and audio codec. Use Value: 2.7V minimum input and 100% duty-cycle operation maintain 5V output down to 2.7V battery voltage; ±1% accuracy ensures consistent RF output power. |
| Industrial Data Loggers | Low-Power IoT Edge Nodes |
Use Scenario: Battery-backed environmental monitor logging temperature/humidity every 5 minutes in remote locations. IC Role / Device Role / Timing Role: System power manager converting 3.6V primary lithium battery to regulated 5V for microcontroller and sensor interface. Use Value: Zero-current shutdown (0.1µA) preserves battery during long sleep intervals; PGOOD signal validates rail before wake-up sampling. | Use Scenario: Cellular-connected sensor node using NB-IoT modem, requiring burst-mode 5V supply synchronized to modem transmit windows. IC Role / Device Role / Timing Role: High-efficiency 5V buck converter triggered by modem's enable signal; MODE/SYNC pin used for external clock sync during transmission. Use Value: External clock synchronization aligns switching edges with modem RF bursts - reducing conducted EMI coupling into sensitive RF receive path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62865RQYR | 2.5V–5.5V input, 5V fixed, 2A, 2.25MHz, 1.2µA IQ - lower IQ but narrower VIN range. | Not suitable for 12V input or battery discharge below 2.5V; optimized for USB-powered systems only. | Select when input is strictly 3.3V/5V rail and ultra-low IQ dominates over input flexibility. |
| MP2451DT-LF-Z | 4.5V–36V input, 5V fixed, 2A, 2MHz, 260µA IQ - wider VIN but higher quiescent current. | Accepts 24V industrial rails but draws 74× more IQ than LTC3624EMSE-5#TRPBF in light-load operation. | Select when input exceeds 17V or automotive transients (ISO 7637-2) require >36V tolerance. |
Compared with TPS62865RQYR and MP2451DT-LF-Z, the LTC3624EMSE-5#TRPBF uniquely balances 17V max input, 2.7V min input, 3.5µA IQ, and 2.25MHz operation - making it optimal for battery-powered equipment spanning single-cell Li-ion to 12V nominal inputs where both efficiency and compactness are critical.
Availability
LTC3624EMSE-5#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, emergency communication devices, and industrial data loggers requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LTC3624EMSE-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 full product support, documentation, and manufacturing continuity for the LTC portfolio.
The LTC3624 series belongs to Linear's high-efficiency monolithic buck regulator product line, designed specifically for battery-powered and space-constrained applications demanding ultralow quiescent current and high-frequency operation.
FAQ
What is the input voltage range supported by the LTC3624EMSE-5#TRPBF?
The LTC3624EMSE-5#TRPBF supports an input voltage range of 2.7V to 17V. This allows operation from single-cell Li-ion batteries (2.7V–4.2V), dual-cell alkaline (2.7V–3.6V), and standard 12V industrial rails. The device includes undervoltage lockout (UVLO) that disables regulation below 2.6V and overvoltage protection that suspends operation above 19V - ensuring robustness across real-world supply variations. The LTC3624EMSE-5#TRPBF maintains regulation down to 2.7V input while delivering full 2A output.
Does the LTC3624EMSE-5#TRPBF require external feedback resistors to set the output voltage?
No, the LTC3624EMSE-5#TRPBF does not require external feedback resistors. As a fixed 5V output variant, the FB pin is internally connected to the output, eliminating the need for an external resistor divider. This simplifies PCB layout, improves output voltage accuracy (±1%), and reduces component count. For adjustable versions like LTC3624EMSE-2#TRPBF, external resistors would be required - but the LTC3624EMSE-5#TRPBF delivers precisely 5.0V without any external programming components.
How does the MODE/SYNC pin function on the LTC3624EMSE-5#TRPBF?
The MODE/SYNC pin on the LTC3624EMSE-5#TRPBF serves dual functions: selecting operating mode (Burst Mode®, pulse-skipping, or forced continuous) and synchronizing the internal 2.25MHz oscillator to an external clock. Tying MODE/SYNC to INTVCC enables Burst Mode® (3.5µA IQ); grounding it selects pulse-skipping (lower ripple); applying 1V–2.8V enables forced continuous mode. Connecting an external clock signal (2.05–2.45MHz) synchronizes switching and forces continuous operation. This flexibility lets designers optimize for efficiency, noise, or EMI requirements without changing the LTC3624EMSE-5#TRPBF itself.
What thermal considerations apply to the LTC3624EMSE-5#TRPBF in a 2A application?
The LTC3624EMSE-5#TRPBF uses a 12-lead MSOP package with an exposed thermal pad (Pin 13) that must be soldered to a PCB ground plane to achieve its specified θJA = 40°C/W and θJC = 10°C/W. At 2A output with 12V input, typical power dissipation is ~0.4W; without proper thermal pad connection, junction temperature can exceed 125°C even at room ambient. A 2cm² copper pour connected to the exposed pad via ≥4 thermal vias is recommended. The device includes overtemperature protection that disables switching above 150°C, but sustained operation above 125°C reduces lifetime reliability. The LTC3624EMSE-5#TRPBF is rated for –40°C to 125°C junction operation.
Can the LTC3624EMSE-5#TRPBF operate in 100% duty cycle dropout mode?
Yes, the LTC3624EMSE-5#TRPBF supports true 100% duty cycle operation, enabling regulation even when input voltage drops to the 5V output level. In dropout, the top PMOS switch remains continuously on while control circuitry stays active - maintaining regulation without interruption. This capability is critical for battery-powered applications where VIN decays from 4.2V to 3.0V (Li-ion) or 3.0V to 2.7V (alkaline), yet the LTC3624EMSE-5#TRPBF sustains clean 5V output. In Burst Mode®, dropout operation further reduces IQ to extend usable battery capacity. The LTC3624EMSE-5#TRPBF achieves this with internal slope compensation and accurate peak current limit maintenance at high duty cycles.
LTC3624EMSE-5#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:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-MSOP-EP
LTC3624EMSE-5#TRPBF FAQ
1.How can I place an order for LTC3624EMSE-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3624EMSE-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 LTC3624EMSE-5#TRPBF reliable?
The price and inventory of LTC3624EMSE-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 LTC3624EMSE-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3624EMSE-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3624EMSE-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3624EMSE-5#TRPBF?
LTC3624EMSE-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3624EMSE-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 LTC3624EMSE-5#TRPBF?
For technical support, including LTC3624EMSE-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3624EMSE-5#TRPBF requirements.
6.How does Aetrix verify that LTC3624EMSE-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3624EMSE-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 LTC3624EMSE-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3624EMSE-5#TRPBF?
All LTC3624EMSE-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3624EMSE-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 LTC3624EMSE-5#TRPBF part is unused and in its original packaging.
Return procedure for LTC3624EMSE-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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