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Analog Devices Inc. LTC3624EMSE-5#PBF
- Part No.:
- LTC3624EMSE-5#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3624EMSE-5#PBF.pdf
- Description:
- IC REG BUCK 5V 2A 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:116
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Product details
Overview
LTC3624EMSE-5#PBF from Analog Devices (formerly Linear Technology) is a 2.25MHz, 2A synchronous step-down regulator with fixed 5V output, 3.5µA quiescent current, and operation from 2.7V to 17V input. It delivers ±1% output accuracy, supports forced continuous/pulse-skipping/Burst Mode® operation, and targets battery-powered portable instrumentation requiring high light-load efficiency and compact power conversion.
For engineers reviewing the LTC3624EMSE-5#PBF datasheet, LTC3624EMSE-5#PBF pinout, LTC3624EMSE-5#PBF application, or LTC3624EMSE-5#PBF equivalent, key selection criteria include its 2.25MHz switching frequency, 5V fixed output with ±1% regulation, 12-lead MSOP package with exposed thermal pad, and support for external clock synchronization within ±40% of nominal frequency.
Technical Context
The LTC3624EMSE-5#PBF implements a constant-frequency peak current mode control architecture with internal compensation and 1ms soft-start. Its 2.25MHz oscillator enables compact magnetics and low-profile designs while maintaining stable regulation across 2.7V–17V input and full 2A load range.
It integrates both PMOS high-side and NMOS low-side power switches with 200mΩ and 115mΩ on-resistances respectively, supports dropout operation at 100% duty cycle, 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% - ensures stable logic supply for microcontrollers and sensors without external feedback divider. |
| 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 portable devices such as emergency radios and handheld meters. |
| 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. |
| Max Output Current | 2A continuous - supports moderate-power digital loads including FPGAs, ADCs, and RF front-ends. |
| Thermal Shutdown | Active at TJ ≥ 150°C - protects device during sustained overload or poor PCB thermal design. |
| Power Good Accuracy | ±7.5% window - provides reliable system reset signaling when VOUT deviates beyond regulation tolerance. |
Pinout & Package
Package: 12-lead plastic MSOP with exposed thermal pad (Pin 13 = GND). Requires soldering of exposed pad to PCB ground plane for rated thermal performance (θJA = 40°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pins 1,2) | Switch node connection | Drives external inductor; must be routed with minimal loop area to reduce EMI and voltage spikes. |
| VIN (Pins 3,4) | Main input supply | Accepts 2.7V–17V; requires local 10µF ceramic bypass capacitor placed adjacent to pins. |
| RUN (Pin 5) | Enable control input | Logic-high (>0.35V) enables regulation; tie to VIN or microcontroller GPIO for sequencing. |
| PGOOD (Pin 6) | Output voltage monitor | Open-drain output pulled low if VOUT falls outside ±7.5%; 32-cycle blanking prevents transient false triggers. |
| FB (Pin 8) | Feedback reference point | Internally connected to 5V output; no external resistor divider needed for fixed-output operation. |
| INTVCC (Pin 9) | Built-in LDO output | 3.6V regulated supply for internal circuitry; bypass with ≥2.2µF ceramic to GND. |
| MODE/SYNC (Pin 10) | Operating mode select | Tie to INTVCC for Burst Mode®, to GND for pulse-skipping, or to external clock for synchronization. |
| GND (Pins 11,12,13) | Signal and power ground | Exposed pad (Pin 13) is primary thermal path - must be soldered to solid copper pour. |
| NC (Pin 7) | No connect | Not internally bonded; leave unconnected and unpopulated on PCB. |
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 IoT sensors. |
| 2.25MHz fixed-frequency switching | Enables <3mm × 3mm inductor footprint and simplifies EMI filter design versus lower-frequency alternatives. |
| Internal compensation | Eliminates need for external compensation network - reduces BOM count and layout sensitivity. |
| 100% duty cycle dropout capability | Maintains regulation down to VIN = VOUT - essential for brownout resilience in battery-fed systems. |
| Synchronization input (MODE/SYNC) | Allows alignment of switching edges to system clock or other regulators - minimizes beat frequencies and conducted noise. |
Applications
| Battery-Powered Portable Instrumentation | Emergency Radios |
|---|---|
Use Scenario: Handheld multimeters and portable oscilloscopes operating from 2×AA/AAA cells or single Li-ion batteries. IC Role / Device Role / Timing Role: Primary 5V system rail regulator delivering clean, efficient power to MCU, display driver, and analog front-end. Use Value: 3.5µA quiescent current extends shelf life and runtime; 2.25MHz operation allows ultra-compact PCB layout with minimal passive footprint. | Use Scenario: Self-contained emergency communication devices powered by alkaline or NiMH batteries with no AC charging. IC Role / Device Role / Timing Role: Main 5V supply for audio amplifier, RF transceiver, and microcontroller - must operate reliably down to 2.7V input. Use Value: 100% duty cycle dropout ensures continued function during deep battery discharge; ±1% output accuracy maintains audio fidelity and RF stability. |
| General Purpose Step-Down Supplies | Industrial Sensor Nodes |
Use Scenario: Fixed 5V conversion in programmable logic controllers, data acquisition modules, and fieldbus interface cards. IC Role / Device Role / Timing Role: Compact, robust DC-DC solution replacing discrete buck controllers and external MOSFETs. Use Value: Integrated power switches and thermal protection simplify design qualification; MSOP package supports automated assembly and rework. | Use Scenario: Wireless sensor nodes deployed in remote locations with long-life primary batteries (e.g., lithium thionyl chloride). IC Role / Device Role / Timing Role: Always-on 5V rail powering low-duty-cycle MCU, RF transceiver, and precision analog signal chain. Use Value: Burst Mode® operation achieves µA-level sleep current; PGOOD output enables precise power sequencing and fault detection. |
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, 5V fixed output, 2.2MHz, 3µA IQ, 2A, 12-pin WSON | Lower VIN range limits use with 12V inputs; smaller 2mm × 2mm package but no exposed thermal pad | Select when board space is constrained and input never exceeds 5.5V. |
| MAX20004AATP+T | 3.5V–36V input, 5V fixed output, 2.1MHz, 12µA IQ, 2A, 12-pin TDFN | Wider VIN range and automotive AEC-Q100 qualification; higher IQ reduces battery life in ultra-low-power apps | Select for 12V/24V industrial or automotive environments requiring extended temperature and reliability compliance. |
Compared with TPS62865ARGTR and MAX20004AATP+T, the LTC3624EMSE-5#PBF uniquely balances 17V max input, 3.5µA IQ, and 2.25MHz operation in a thermally enhanced MSOP - making it optimal for portable equipment where input voltage flexibility and battery longevity are jointly critical.
Availability
LTC3624EMSE-5#PBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, emergency communication devices, and industrial sensor nodes requiring stable component supply and long-term manufacturability.
Supply support for LTC3624EMSE-5#PBF 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 legacy of high-performance power management ICs with rigorous characterization and long-lifecycle support.
The LTC3624 family is designed for ultralow-quiescent-current, high-efficiency step-down conversion in portable and energy-sensitive applications - emphasizing wide input range, fixed/flexible output options, and robust thermal behavior in compact packages.
FAQ
What is the switching frequency of the LTC3624EMSE-5#PBF?
The LTC3624EMSE-5#PBF operates at a fixed 2.25MHz switching frequency with ±10% tolerance over temperature and line. This frequency is factory-set for the -2 variant and cannot be adjusted via external components. It enables compact external magnetics and reduced output capacitance requirements compared to lower-frequency regulators.
Does the LTC3624EMSE-5#PBF require an external feedback resistor divider?
No, the LTC3624EMSE-5#PBF does not require an external feedback resistor divider because it is a fixed 5V output version. The FB pin is internally connected to the regulated output, eliminating the need for external resistors and reducing BOM cost and layout complexity.
What is the maximum input voltage rating for the LTC3624EMSE-5#PBF?
The absolute maximum input voltage for the LTC3624EMSE-5#PBF is 17V. Operation above this level risks permanent damage. The device also features VIN overvoltage lockout that suspends switching if VIN exceeds 19V, resuming normal operation once VIN drops below 18.5V.
How does the MODE/SYNC pin function on the LTC3624EMSE-5#PBF?
The MODE/SYNC pin on the LTC3624EMSE-5#PBF selects operating mode: tied to INTVCC enables Burst Mode® (3.5µA IQ), grounded enables pulse-skipping (lower ripple), and driven by an external clock synchronizes switching within ±40% of 2.25MHz. Voltage between 1V and VINTVCC – 1.2V forces continuous conduction.
What thermal considerations apply to the LTC3624EMSE-5#PBF in the MSOP package?
The LTC3624EMSE-5#PBF in the 12-lead MSOP package requires soldering of the exposed thermal pad (Pin 13) to a PCB ground plane for optimal thermal performance. With proper layout, θJA is 40°C/W; omitting pad connection degrades thermal resistance significantly and may trigger overtemperature shutdown under 2A load.
LTC3624EMSE-5#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LTC3624EMSE-5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3624EMSE-5#PBF 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#PBF reliable?
The price and inventory of LTC3624EMSE-5#PBF 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#PBF is usually 5 days.
3.What payment methods are accepted for LTC3624EMSE-5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3624EMSE-5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3624EMSE-5#PBF?
LTC3624EMSE-5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3624EMSE-5#PBF 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#PBF?
For technical support, including LTC3624EMSE-5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3624EMSE-5#PBF requirements.
6.How does Aetrix verify that LTC3624EMSE-5#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3624EMSE-5#PBF 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#PBF meets industry standards.
7.What is the process for return or replacement of LTC3624EMSE-5#PBF?
All LTC3624EMSE-5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3624EMSE-5#PBF, 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#PBF part is unused and in its original packaging.
Return procedure for LTC3624EMSE-5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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