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Analog Devices Inc. LTC3624HMSE-2#TRPBF
- Part No.:
- LTC3624HMSE-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3624HMSE-2#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 2A 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,005
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Product details
Overview
LTC3624HMSE-2#TRPBF from Analog Devices (formerly Linear Technology) is a 17V, 2A synchronous step-down regulator in a 12-lead MSOP package with exposed pad, operating at a fixed 2.25MHz switching frequency, delivering adjustable output from 0.6V to VIN, and featuring 3.5µA quiescent current in Burst Mode for battery-powered instrumentation.
For engineers reviewing the LTC3624HMSE-2#TRPBF datasheet, LTC3624HMSE-2#TRPBF pinout, LTC3624HMSE-2#TRPBF application, or LTC3624HMSE-2#TRPBF equivalent, key selection criteria include its high-frequency operation enabling compact filter design, ultralow IQ for extended runtime, ±1% output accuracy over temperature, and support for forced continuous, pulse-skipping, and Burst Mode® control.
Technical Context
The LTC3624HMSE-2#TRPBF employs constant-frequency peak current mode control with internal compensation, supporting synchronization to an external clock across a ±40% range of its nominal 2.25MHz frequency. It integrates both PMOS and NMOS power switches with RDS(ON) of 200mΩ (top) and 115mΩ (bottom) at VIN = 5V.
Its MODE/SYNC pin enables dynamic selection among three operating modes: Burst Mode (for <3.5µA IQ), pulse-skipping (for low ripple), or forced continuous (for EMI-sensitive applications). The device includes integrated soft-start (1ms), overtemperature protection, and PGOOD with 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 regulation from 12V/5V inputs down to core logic voltages like 1.2V or 0.9V via resistor divider. |
| Switching Frequency | 2.25MHz (±40% sync range) - allows use of sub-3mm inductors and ceramic capacitors for space-constrained portable designs. |
| Quiescent Current | 3.5µA in Burst Mode - extends battery life in always-on sensor nodes or emergency radios with multi-year standby. |
| Output Accuracy | ±1% over –40°C to 150°C - ensures stable voltage delivery across full industrial temperature range without calibration. |
| Peak Current Limit | 2.3A (H-grade) - provides robust short-circuit protection while sustaining 2A continuous output under thermal limits. |
| Thermal Rating | Junction max 150°C - qualified for high-reliability applications including under-hood automotive and industrial controls. |
Pinout & Package
Package: 12-Lead Plastic MSOP with exposed thermal pad (Pin 13 = GND), rated for –40°C to 150°C junction temperature, θJA = 40°C/W, θJC = 10°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pins 1,2) | Switch Node | Connects to inductor; carries high di/dt square wave - requires tight layout and Kelvin connection to minimize EMI. |
| VIN (Pins 3,4) | Main Input Supply | Accepts 2.7–17V; powers internal LDO (INTVCC) and high-side switch - bypass with ≥10µF ceramic near pin. |
| RUN (Pin 5) | Enable Control | Active-high logic input; pulls low to disable regulator and reduce system standby power to <100nA. |
| PGOOD (Pin 6) | Power-Good Indicator | Open-drain output pulled low if VOUT deviates >±7.5%; includes 32-cycle blanking to reject transient glitches. |
| FB (Pin 8) | Feedback Input | Senses resistive divider output; regulates VOUT = 0.6V × (1 + R2/R1); input bias <10nA enables high-impedance dividers. |
| INTVCC (Pin 9) | Internal LDO Output | 3.6V regulated supply for gate drivers and logic; must be bypassed with ≥2.2µF to GND for stability. |
| MODE/SYNC (Pin 10) | Operating Mode Select | Tied to INTVCC → Burst Mode; grounded → pulse-skipping; 1–2.8V → forced continuous; driven externally → sync. |
| GND (Pins 11,12, EP Pin 13) | Signal & Power Ground | Exposed pad is electrically and thermally GND - must be soldered to PCB thermal plane for rated θJC. |
| NC (Pin 7) | No Connect | Internally unconnected - no electrical function; leave floating or tie to GND per layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow Quiescent Current | 3.5µA in Burst Mode enables >10-year battery life in IoT sensors powered by coin cells. |
| 2.25MHz Fixed Switching | Enables use of 2.2µH inductors and 4.7–22µF ceramic output caps - reduces solution size by >40% vs 1MHz parts. |
| Three-Mode Control Logic | Selectable via single MODE/SYNC pin: Burst (efficiency), pulse-skipping (low ripple), or forced continuous (EMI control). |
| Integrated Soft-Start | 1ms internal ramp prevents inrush current - eliminates need for external soft-start circuitry or sequencing controllers. |
| High-Temperature Operation | Rated to 150°C junction - suitable for enclosed industrial enclosures or automotive under-dash environments. |
Applications
| Battery-Powered Instrumentation | Emergency Radios |
|---|---|
Use Scenario: Portable multimeters and handheld oscilloscopes requiring long runtime from AA/AAA batteries. IC Role / Device Role / Timing Role: Primary DC/DC converter regulating 3.3V or 5V from 9V alkaline or 3.7V Li-ion input. Use Value: 3.5µA IQ extends battery life to >500 hours in sleep mode; 2.25MHz operation minimizes inductor size for pocket-sized form factors. | Use Scenario: Self-contained emergency communication devices deployed in disaster zones with no grid access. IC Role / Device Role / Timing Role: Step-down regulator powering MCU, RF transceiver, and audio amplifier from primary lithium thionyl chloride battery. Use Value: Low dropout capability (100% duty cycle) sustains operation down to 2.7V input; ±1% accuracy ensures reliable MCU reset and ADC reference stability. |
| Industrial Sensor Nodes | Portable Medical Monitors |
Use Scenario: Wireless vibration or temperature sensors mounted on rotating machinery with sealed battery compartments. IC Role / Device Role / Timing Role: Efficient power conversion for ultra-low-power microcontrollers and BLE/Wi-Fi transceivers. Use Value: Burst Mode reduces average current draw to µA-range during sensor idle periods; MSOP package withstands thermal cycling in industrial enclosures. | Use Scenario: Handheld ECG or pulse oximetry units used in field triage with strict size and battery-life requirements. IC Role / Device Role / Timing Role: Dual-rail supply generator providing clean 3.3V for digital logic and low-noise 1.8V for analog front-end via resistor divider. Use Value: Pulse-skipping mode selected via MODE/SYNC pin delivers <10mVpp ripple for precision analog signal chains without external filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62840DLCR | 2.4V–6V input, 1.8V fixed output only; 0.3µA IQ; 2.25MHz; 1A output; 6-pin WSON | Limited to low-VIN, fixed-output use cases; insufficient for 12V input or adjustable VOUT | Select only when input ≤6V and output is fixed at 1.8V/3.3V; not suitable as drop-in replacement for LTC3624HMSE-2#TRPBF. |
| MAX20077ATC+T | 3.5V–36V input, 3.3V/5V fixed outputs; 2.2MHz; 2A; 10µA IQ; 16-pin TQFN | Higher minimum input (3.5V), no adjustable option, larger package, higher IQ than Burst Mode | Prefer for automotive 12V systems needing AEC-Q100 qualification; avoid where ultralow IQ or 2.7V start-up is required. |
Compared with TPS62840DLCR and MAX20077ATC+T, the LTC3624HMSE-2#TRPBF uniquely combines 2.7V start-up, fully adjustable output, 3.5µA IQ, and 2.25MHz operation in a thermally enhanced MSOP - making it optimal for portable industrial and medical equipment where input range, efficiency, and board area are jointly constrained.
Availability
LTC3624HMSE-2#TRPBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, emergency radios, and industrial sensor nodes requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LTC3624HMSE-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 and maintains its legacy of high-performance power management ICs with rigorous characterization and industrial-grade reliability.
The LTC3624HMSE-2#TRPBF belongs to the LTC3624 family of high-efficiency, ultralow-IQ synchronous buck regulators designed specifically for space- and power-constrained portable and battery-operated systems.
FAQ
What is the maximum junction temperature rating for the LTC3624HMSE-2#TRPBF?
The LTC3624HMSE-2#TRPBF is rated for operation up to 150°C junction temperature, confirmed by its H-grade temperature specification and θJA = 40°C/W thermal resistance. This rating is validated across the full –40°C to 150°C operating range and supports deployment in high-ambient environments such as enclosed industrial controls or automotive under-dash locations where the LTC3624HMSE-2#TRPBF must sustain 2A output without derating.
How does the MODE/SYNC pin configure operating modes on the LTC3624HMSE-2#TRPBF?
The MODE/SYNC pin on the LTC3624HMSE-2#TRPBF selects between three distinct operating modes: tying to INTVCC enables Burst Mode (3.5µA IQ, 800mA peak clamp); grounding enables pulse-skipping (lowest VOUT ripple); applying 1V–2.8V enables forced continuous mode (EMI-controlled, zero-load capable). External clock injection synchronizes switching at ±40% of 2.25MHz. Each configuration is verified in the Electrical Characteristics table and functional block diagram of the LTC3624HMSE-2#TRPBF datasheet.
Can the LTC3624HMSE-2#TRPBF regulate output voltage below 1V?
Yes, the LTC3624HMSE-2#TRPBF supports output voltages as low as 0.6V using an external resistor divider, per the equation VOUT = 0.6V × (1 + R2/R1). Its ±1% feedback reference accuracy and <10nA FB input bias enable precise low-voltage regulation for modern sub-1V microcontrollers and FPGAs. This capability is explicitly specified in the Electrical Characteristics table under "VFB Regulated Feedback Voltage" and confirmed in Figure 1 of the LTC3624HMSE-2#TRPBF application note.
What is the minimum on-time limitation of the LTC3624HMSE-2#TRPBF and how does it affect design?
The LTC3624HMSE-2#TRPBF has a typical minimum on-time of 60ns, imposing a 13.5% minimum duty cycle at 2.25MHz. This limits the lowest achievable VOUT at high input voltages (e.g., VIN = 12V → VOUT ≥ 1.62V in forced continuous mode). To maintain regulation below this threshold, designers must select Burst Mode or pulse-skipping operation, or reduce switching frequency via external sync - all validated in the "Minimum On-Time" section of the LTC3624HMSE-2#TRPBF datasheet.
Does the LTC3624HMSE-2#TRPBF include overvoltage and undervoltage protection?
Yes, the LTC3624HMSE-2#TRPBF integrates both VIN overvoltage lockout (19V trip, 500mV hysteresis) and undervoltage lockout (2.7V rising threshold, 175mV hysteresis). These protections suspend switching to safeguard internal MOSFETs and downstream circuitry during transients. The OVP recovery includes automatic soft-start reinitialization, and both thresholds are production-tested and listed in the Absolute Maximum Ratings and Electrical Characteristics tables of the LTC3624HMSE-2#TRPBF datasheet.
LTC3624HMSE-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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-MSOP-EP
LTC3624HMSE-2#TRPBF FAQ
1.How can I place an order for LTC3624HMSE-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3624HMSE-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 LTC3624HMSE-2#TRPBF reliable?
The price and inventory of LTC3624HMSE-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 LTC3624HMSE-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3624HMSE-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3624HMSE-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3624HMSE-2#TRPBF?
LTC3624HMSE-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3624HMSE-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 LTC3624HMSE-2#TRPBF?
For technical support, including LTC3624HMSE-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3624HMSE-2#TRPBF requirements.
6.How does Aetrix verify that LTC3624HMSE-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3624HMSE-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 LTC3624HMSE-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3624HMSE-2#TRPBF?
All LTC3624HMSE-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3624HMSE-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 LTC3624HMSE-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC3624HMSE-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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