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Analog Devices Inc. LTC3624HMSE#TRPBF
- Part No.:
- LTC3624HMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3624HMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 2A 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,658
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Product details
Overview
LTC3624HMSE#TRPBF from Analog Devices (formerly Linear Technology) is a 17V, 2A synchronous step-down DC/DC regulator in a 12-lead MSOP package with exposed thermal pad. It delivers adjustable output voltage from 0.6V to VIN at up to 2A, operates from 2.7V–17V input, features 2.25MHz fixed switching frequency, and achieves 3.5µA quiescent current in Burst Mode for battery-powered portable instrumentation.
For engineers reviewing the LTC3624HMSE#TRPBF datasheet, LTC3624HMSE#TRPBF pinout, LTC3624HMSE#TRPBF application, or LTC3624HMSE#TRPBF equivalent, key selection criteria include its high-temperature rating (–40°C to 150°C), ultralow IQ operation, MODE/SYNC-configurable control modes (Burst, pulse-skipping, forced continuous), ±1% output accuracy, and internal compensation enabling compact layout with minimal external components.
Technical Context
The LTC3624HMSE#TRPBF implements a constant-frequency peak current mode architecture with internal slope compensation, supporting stable regulation across wide input/output ranges. Its 2.25MHz switching frequency enables use of small external inductors and ceramic capacitors while maintaining high efficiency down to light loads via selectable discontinuous-conduction modes.
Operation is controlled by the MODE/SYNC pin: tied to INTVCC for Burst Mode (800mA peak clamp, 3.5µA IQ), grounded for pulse-skipping (lowest ripple), or biased between 1V and VINTVCC–1.2V for forced continuous mode. The device integrates overtemperature protection, VIN overvoltage lockout (19V trip), and undervoltage lockout (2.7V), with PGOOD monitoring output voltage within ±7.5% tolerance and 32-cycle blanking delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 17V - supports wide-input industrial and automotive supply rails without pre-regulation |
| Output Voltage Range | 0.6V to VIN - enables direct generation of core voltages (e.g., 1.2V, 1.8V) or adjustable bias supplies |
| Switching Frequency | 2.25MHz (±40% sync range) - allows compact 2.2µH inductor and low-profile 1206/0805 ceramic capacitors |
| Quiescent Current | 3.5µA in Burst Mode - extends battery life in always-on portable devices such as emergency radios |
| Output Accuracy | ±1% over temperature - ensures reliable microcontroller core voltage regulation without calibration |
| Max Output Current | 2A - sufficient for powering FPGA I/O banks, sensor signal chains, or RF front-end modules |
| Junction Temp Range | –40°C to +150°C - qualified for under-hood automotive or high-ambient industrial environments |
Pinout & Package
Package: 12-Lead Plastic MSOP with exposed thermal pad (Pin 13 = GND), rated for –40°C to +150°C operating junction temperature. Exposed pad must be soldered to PCB ground for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pins 1,2) | Switch Node | Connection point for external inductor; carries high di/dt square-wave current requiring tight layout and Kelvin grounding |
| VIN (Pins 3,4) | Main Input Supply | Accepts 2.7V–17V; powers internal LDO (INTVCC) and high-side PMOS switch; requires local 10µF ceramic bypass |
| RUN (Pin 5) | Enable Control | Active-high logic input; pulling low disables regulator and reduces VIN current to 0.1µA shutdown state |
| PGOOD (Pin 6) | Power-Good Indicator | Open-drain output pulled low when VOUT deviates >±7.5%; includes 32-cycle blanking to suppress transient glitches |
| FB (Pin 8) | Feedback Input | Senses resistor divider output; regulates VOUT = 0.6V × (1 + R2/R1); connect directly to VOUT for fixed-output variants |
| INTVCC (Pin 9) | Internal LDO Output | 3.6V regulated supply for gate drivers and logic; requires ≥2.2µF ceramic capacitor to GND for stability |
| MODE/SYNC (Pin 10) | Operating Mode Select | Configures Burst Mode (to INTVCC), pulse-skipping (to GND), forced continuous (1V–2.4V), or external clock sync |
| GND (Pins 11,12,13) | Signal & Power Ground | Common reference for all circuitry; exposed pad (Pin 13) is mandatory GND connection for thermal management |
| NC (Pin 7) | No Connect | Unbonded pin; no internal connection; must remain unconnected 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 | Enables use of sub-3mm × 3mm inductors and eliminates audible noise - ideal for space-constrained portable medical devices |
| 100% Duty Cycle Capability | Supports dropout operation down to VIN = VOUT with ultralow IQ - preserves functionality during brownout conditions |
| Internal Compensation | Eliminates need for external compensation network - reduces BOM count and design validation time |
| Integrated Soft-Start | 1ms internal ramp prevents inrush current and output overshoot - simplifies power sequencing in multi-rail systems |
| Overtemperature Protection | Thermal shutdown at TJ >150°C with automatic recovery - protects against sustained overload or poor heatsinking |
Applications
| Battery-Powered Portable Instrumentation | Emergency Radios |
|---|---|
Use Scenario: Handheld multimeter or portable oscilloscope powered by two AA cells (2.4V–3.2V) requiring stable 3.3V and 1.8V rails. IC Role / Device Role / Timing Role: Primary buck regulator generating 3.3V system rail; FB pin configured for adjustable output via precision resistor divider. Use Value: 3.5µA quiescent current extends battery life beyond 1 year in sleep mode; 2.25MHz operation minimizes solution size to fit within slim enclosure. | Use Scenario: Solar-charged emergency radio with Li-ion backup, needing regulated 5V output from variable 3.6V–16V input. IC Role / Device Role / Timing Role: Main step-down converter delivering 2A to audio amplifier and digital baseband IC; MODE/SYNC pin grounded for low-ripple pulse-skipping mode. Use Value: Wide 2.7V–17V input range accommodates full battery discharge curve; ±1% accuracy ensures consistent audio codec performance. |
| Industrial Sensor Signal Chains | Low-Power Wireless Transceivers |
Use Scenario: 4–20mA loop-powered temperature transmitter with isolated ADC and microcontroller requiring clean 3.3V supply. IC Role / Device Role / Timing Role: Post-isolation buck regulator converting 12V loop supply to 3.3V; operated in forced continuous mode for lowest noise in analog section. Use Value: Internal soft-start prevents ADC reference disturbance during power-up; 12-lead MSOP package allows thermal relief via exposed pad on 2-layer PCB. | Use Scenario: Sub-GHz LoRaWAN node powered by coin cell, requiring 3.0V rail for RF transceiver and MCU during brief transmit bursts. IC Role / Device Role / Timing Role: High-efficiency buck converter supplying 2A peak current during 100ms TX pulses; Burst Mode active between transmissions. Use Value: 2.25MHz switching avoids interference with 868/915MHz ISM bands; 150°C junction rating supports operation inside sealed outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z | 3.5V–36V input, 2A, 2MHz, 17µA IQ, no Burst Mode, requires external compensation | Higher VIN range but higher IQ and no ultralow-power light-load mode | Select when input exceeds 17V or cost sensitivity outweighs IQ requirements |
| TPS6286418RRLR | 2.7V–6V input, 4A, 4MHz, 0.5µA IQ, integrated inductor option, pin-compatible with TPS6286x family | Narrower VIN range, higher current, lower IQ, but limited to low-VIN applications | Select for ultra-low-IQ battery systems below 6V where 4A capability is needed |
Compared with MP2451DT-LF-Z and TPS6286418RRLR, the LTC3624HMSE#TRPBF uniquely balances 2.25MHz operation, 3.5µA IQ, 17V max input, and 150°C rating - making it optimal for thermally demanding, battery-backed portable instrumentation where size, efficiency, and reliability are co-prioritized.
Availability
LTC3624HMSE#TRPBF is available at Aetrix Electronics and suitable for battery-powered portable instrumentation, emergency radios, industrial sensor signal chains, and low-power wireless transceivers requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LTC3624HMSE#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LTC3624HMSE#TRPBF belongs to Linear's monolithic synchronous buck regulator product line, designed specifically for space-constrained, battery-sensitive applications demanding ultralow quiescent current, wide input range, and robust thermal performance.
FAQ
What is the maximum junction temperature rating for the LTC3624HMSE#TRPBF?
The LTC3624HMSE#TRPBF is specified for operation from –40°C to +150°C junction temperature, with thermal shutdown engaging above this limit. This H-grade qualification makes the LTC3624HMSE#TRPBF suitable for under-hood automotive modules, industrial controllers in hot enclosures, and high-reliability portable equipment where ambient temperatures exceed 85°C. The exposed pad (Pin 13) must be soldered to a thermal pad on the PCB to achieve the rated θJC = 10°C/W.
How does the MODE/SYNC pin configure operating modes on the LTC3624HMSE#TRPBF?
The MODE/SYNC pin on the LTC3624HMSE#TRPBF selects among three distinct operating modes: tie to INTVCC for Burst Mode (3.5µA IQ, 800mA peak clamp), ground for pulse-skipping (lowest output ripple), or bias between 1V and VINTVCC–1.2V for forced continuous mode (fixed 2.25MHz, zero-load capable). It also accepts external clock signals within ±40% of 2.25MHz to synchronize switching, preventing beat frequencies in multi-regulator systems. The LTC3624HMSE#TRPBF enters sync mode within 2–3 external clock cycles.
Can the LTC3624HMSE#TRPBF operate in 100% duty cycle dropout mode?
Yes, the LTC3624HMSE#TRPBF supports 100% duty cycle operation when VIN approaches VOUT, maintaining regulation without external components. In dropout, the top PMOS switch remains continuously on, and internal circuitry sustains ultralow 3.5µA quiescent current if Burst Mode is selected - extending usable battery life during deep discharge. The device maintains ±1% output accuracy and PGOOD assertion throughout dropout, with no minimum off-time limitation compromising regulation.
What is the purpose of the PGOOD pin on the LTC3624HMSE#TRPBF and how is it implemented?
The PGOOD pin on the LTC3624HMSE#TRPBF is an open-drain output that signals when VOUT is within ±7.5% of its target value. It pulls low via a 280Ω internal pull-down when out of regulation and floats high otherwise (requiring external pull-up). To prevent false triggering during load transients, the LTC3624HMSE#TRPBF incorporates a 32-cycle blanking delay on the falling edge - ensuring PGOOD only asserts after sustained regulation is achieved. This behavior is confirmed in the Electrical Characteristics table under ΔVPGOOD and tPGOOD parameters.
Does the LTC3624HMSE#TRPBF require external compensation components?
No, the LTC3624HMSE#TRPBF features fully internal compensation, eliminating the need for external RC networks typically required in current-mode buck regulators. This simplifies design, reduces BOM count, and improves consistency across production units. The internal compensation is optimized for stability with standard 2.2µH inductors and ceramic output capacitors, as validated in the Typical Application circuits and Stability section of the datasheet. Layout best practices still apply - especially for SW and GND routing - but no external compensation components are required for basic operation.
LTC3624HMSE#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:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-MSOP-EP
LTC3624HMSE#TRPBF FAQ
1.How can I place an order for LTC3624HMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3624HMSE#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 LTC3624HMSE#TRPBF reliable?
The price and inventory of LTC3624HMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3624HMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3624HMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3624HMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3624HMSE#TRPBF?
LTC3624HMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3624HMSE#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 LTC3624HMSE#TRPBF?
For technical support, including LTC3624HMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3624HMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3624HMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3624HMSE#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 LTC3624HMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3624HMSE#TRPBF?
All LTC3624HMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3624HMSE#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 LTC3624HMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3624HMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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