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Analog Devices Inc. LTC3624IMSE-2#TRPBF
- Part No.:
- LTC3624IMSE-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3624IMSE-2#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 2A 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,920
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Product details
Overview
LTC3624IMSE-2#TRPBF from Analog Devices (formerly Linear Technology) is a 17V, 2A synchronous step-down DC/DC regulator in a 12-lead MSOP package, operating at a fixed 2.25MHz switching frequency with ±40% synchronization range, 3.5µA quiescent current in shutdown, and adjustable 0.6V–VIN output voltage - deployed in portable instrumentation and battery-powered equipment requiring high light-load efficiency.
For engineers reviewing the LTC3624IMSE-2#TRPBF datasheet, LTC3624IMSE-2#TRPBF pinout, LTC3624IMSE-2#TRPBF application, or LTC3624IMSE-2#TRPBF equivalent, key selection criteria include its 2.25MHz operation enabling compact external components, ultralow IQ for multi-year battery life, MODE/SYNC-configurable operation modes (Burst, pulse-skipping, forced continuous), and integrated overtemperature protection with 125°C rated junction temperature.
Technical Context
The LTC3624IMSE-2#TRPBF employs a constant-frequency peak current mode control architecture with internal compensation, supporting stable regulation across 2.7V–17V input and 0.6V–VIN output ranges. Its 2.25MHz oscillator enables use of sub-3.3µH inductors and low-ESR ceramic capacitors while maintaining <±1% output voltage accuracy and fast transient response.
Operation is configurable via the MODE/SYNC pin: tied to INTVCC for Burst Mode (800mA peak clamp, 3.5µA IQ), grounded for pulse-skipping (lower ripple), or biased between 1V and VINTVCC–1.2V for forced continuous mode. Internal soft-start (1ms), overvoltage lockout (19V), and undervoltage lockout (2.7V) ensure robust startup and fault handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 2.25MHz (E/I-grade), ±40% sync range - enables small inductors & ceramics, reduces EMI fundamental frequency |
| Input Voltage Range | 2.7V to 17V - supports single-cell Li-ion up to 12V industrial rails |
| Output Current | 2A continuous - sustains full load without thermal derating in MSOP package with exposed pad |
| Quiescent Current | 3.5µA in shutdown, ~1.8mA in forced continuous mode - extends battery life in always-on systems |
| Feedback Reference | 0.6V ±1% - sets output via resistor divider; enables precise 0.6V–VIN adjustment |
| Output Accuracy | ±1% over line/load/temperature - ensures reliable downstream logic and analog supply tolerance |
| Thermal Rating | –40°C to +125°C junction - qualified for industrial and automotive cabin environments |
Pinout & Package
Package: 12-lead plastic MSOP with exposed thermal pad (Pin 13 = GND), footprint compatible with standard MSOP-12 layouts and optimized for thermal dissipation (θJA = 40°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pins 1,2) | Switch node | Connects to inductor; carries high di/dt switching current - requires tight layout and Kelvin connection |
| VIN (Pins 3,4) | Main power input | Accepts 2.7V–17V; supplies internal LDO (INTVCC) and power switches - bypass with ≥10µF ceramic near pin |
| RUN (Pin 5) | Enable control | Active-high logic input; pulls low to disable regulator and reduce IQ to 0.1µA - must not float |
| PGOOD (Pin 6) | Power good indicator | Open-drain output with 280Ω pull-down; asserts high when VOUT within ±7.5% - includes 32-cycle blanking delay |
| FB (Pin 8) | Feedback input | Senses resistor divider output; regulates VOUT = 0.6V × (1 + R2/R1) - high-impedance (10nA bias) |
| INTVCC (Pin 9) | Internal LDO output | 3.6V regulated supply for gate drivers and logic; bypass with ≥2.2µF ceramic to GND |
| MODE/SYNC (Pin 10) | Operating mode select / clock sync | Configures Burst/pulse-skipping/forced continuous modes or accepts external clock (2.05–2.45MHz) |
| GND (Pins 11,12,13) | Signal & power ground | Exposed pad (Pin 13) is GND and must be soldered for thermal and electrical performance |
| NC (Pin 7) | No connect | Internally unconnected - leave unpopulated or grounded 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 >10-year battery life in IoT sensors |
| 2.25MHz fixed-frequency switching | Enables use of 2.2µH inductors and 4.7µF–22µF ceramic output caps - shrinks solution size by >40% vs 1MHz designs |
| 100% duty cycle dropout operation | Maintains regulation down to VIN ≈ VOUT with ultralow IQ - supports brownout resilience in Li-ion systems |
| Integrated soft-start (1ms) | Prevents inrush current and output overshoot during power-up - eliminates need for external timing components |
| Overtemperature protection | Thermal shutdown at TJ > 150°C (H-grade) or 125°C (I-grade); auto-recovery on cooldown - prevents permanent damage under overload |
| ±40% frequency synchronization | Allows noise-sensitive systems to align switching to avoid critical bands (e.g., AM radio, audio ADCs) - no phase jitter penalty |
Applications
| Portable Instrumentation | Battery-Powered Equipment |
|---|---|
Use Scenario: Handheld multimeters and data loggers powered by two AA alkaline cells (1.8V–3.2V) requiring stable 3.3V for MCU and ADC. IC Role / Device Role / Timing Role: Primary step-down regulator delivering 2A peak during measurement bursts while sustaining <5µA sleep IQ. Use Value: Enables >5-year battery life via Burst Mode and 100% duty cycle operation near end-of-life cell voltage. | Use Scenario: Wireless sensor nodes using Li-SOCl₂ primary batteries (3.6V nominal, up to 3.9V) powering RF transceivers and microcontrollers. IC Role / Device Role / Timing Role: High-efficiency buck converter supplying 1.8V/3.3V rails with minimal self-discharge during 99.9% idle time. Use Value: 3.5µA shutdown IQ and ±1% output accuracy prevent premature battery depletion and ensure consistent RF transmit power. |
| Emergency Radios | General Purpose Step-Down Supplies |
Use Scenario: Crank- or solar-charged emergency radios with wide-input (3V–17V) energy harvesting front-end and 5V USB output. IC Role / Device Role / Timing Role: Input-flexible regulator accepting variable harvester output and delivering regulated 5V at up to 2A for audio amplification. Use Value: 2.7V–17V input range and 2.25MHz operation allow direct coupling to supercapacitor banks without pre-regulation stages. | Use Scenario: Industrial control modules requiring isolated 3.3V/5V rails from 12V or 24V backplanes with strict EMI limits. IC Role / Device Role / Timing Role: Compact, low-noise point-of-load regulator synchronized to system clock to suppress beat frequencies. Use Value: ±40% sync range and forced continuous mode eliminate subharmonic artifacts in sensitive analog signal chains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62864DRLR | 2.4MHz fixed frequency, 3.6V–5.5V input, 0.6V–5.5V output, 2A, 1.4µA IQ in shutdown | Lower input voltage range; lacks 17V rating and wide-VIN capability | Select for ultra-low-IQ applications with narrow input rails (e.g., USB-powered devices) |
| MP2451DT-LF-Z | 2MHz fixed frequency, 3.3V–36V input, 0.8V–30V output, 0.6A, 260µA IQ | Lower current rating, higher IQ, wider VIN but no Burst Mode or sync capability | Select for cost-sensitive, high-input-voltage applications where 2A output is not required |
Compared with TPS62864DRLR and MP2451DT-LF-Z, the LTC3624IMSE-2#TRPBF uniquely combines 17V input rating, 2A output, 2.25MHz operation, and sub-4µA shutdown IQ - making it optimal for space-constrained, wide-input, battery-critical systems where both performance and longevity are essential.
Availability
LTC3624IMSE-2#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered equipment, and emergency radios requiring stable component supply with long-term lifecycle support.
Supply support for LTC3624IMSE-2#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) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving precision instrumentation, industrial, and automotive markets.
The LTC3624 product line delivers ultralow-quiescent-current, high-frequency synchronous buck regulators for battery-critical and space-constrained applications - emphasizing efficiency across full load range and robustness in harsh environments.
FAQ
What is the maximum input voltage rating for the LTC3624IMSE-2#TRPBF?
The LTC3624IMSE-2#TRPBF has an absolute maximum input voltage rating of 17V. Operation above this level risks permanent damage. The device includes VIN overvoltage lockout that suspends switching when VIN exceeds 19V (typical), resuming automatically once VIN drops below 18.5V. For sustained operation, keep VIN ≤17V per datasheet specifications.
How does the MODE/SYNC pin configure operation modes on the LTC3624IMSE-2#TRPBF?
The MODE/SYNC pin on the LTC3624IMSE-2#TRPBF selects operating mode: tie to INTVCC for Burst Mode (3.5µA IQ, 800mA peak clamp), ground for pulse-skipping (lowest ripple), or bias between 1V and VINTVCC–1.2V for forced continuous mode. It also accepts external clocks from 2.05MHz to 2.45MHz for synchronization - all configurations are validated in the LTC3624IMSE-2#TRPBF datasheet.
What is the thermal performance of the LTC3624IMSE-2#TRPBF in its MSOP package?
The LTC3624IMSE-2#TRPBF in the 12-lead MSOP package has θJA = 40°C/W and θJC = 10°C/W. With the exposed pad (Pin 13) properly soldered to PCB ground, it sustains 2A continuous output at ambient temperatures up to +85°C. Junction temperature must remain ≤125°C for I-grade operation; thermal shutdown activates at ~150°C to protect the device.
Can the LTC3624IMSE-2#TRPBF operate in 100% duty cycle dropout mode?
Yes, the LTC3624IMSE-2#TRPBF supports true 100% duty cycle operation, maintaining regulation as VIN approaches VOUT. In dropout, the top PMOS switch remains continuously on. This feature is active in all modes (Burst, pulse-skipping, forced continuous) and is confirmed in the LTC3624IMSE-2#TRPBF electrical characteristics table under DMAX = 100%.
What is the feedback reference voltage accuracy of the LTC3624IMSE-2#TRPBF?
The LTC3624IMSE-2#TRPBF features a precision 0.6V feedback reference with ±1% accuracy over –40°C to +125°C junction temperature. This is specified in the Electrical Characteristics table as VFB = 0.594V to 0.606V (min/max) under temperature and line/load conditions - enabling accurate output programming from 0.6V to VIN.
LTC3624IMSE-2#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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 17V
- 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
LTC3624IMSE-2#TRPBF FAQ
1.How can I place an order for LTC3624IMSE-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3624IMSE-2#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 LTC3624IMSE-2#TRPBF reliable?
The price and inventory of LTC3624IMSE-2#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3624IMSE-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3624IMSE-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3624IMSE-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3624IMSE-2#TRPBF?
LTC3624IMSE-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3624IMSE-2#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 LTC3624IMSE-2#TRPBF?
For technical support, including LTC3624IMSE-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3624IMSE-2#TRPBF requirements.
6.How does Aetrix verify that LTC3624IMSE-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3624IMSE-2#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 LTC3624IMSE-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3624IMSE-2#TRPBF?
All LTC3624IMSE-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3624IMSE-2#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 LTC3624IMSE-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC3624IMSE-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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