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Analog Devices Inc. LTC3624EMSE#TRPBF
- Part No.:
- LTC3624EMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3624EMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 2A 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,279
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Product details
Overview
LTC3624EMSE#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 features 2.25MHz fixed switching frequency, 3.5µA quiescent current in shutdown, ±1% output voltage accuracy, and adjustable output from 0.6V to VIN - optimized for battery-powered portable instrumentation requiring ultra-low power consumption and compact layout.
For engineers reviewing the LTC3624EMSE#TRPBF datasheet, LTC3624EMSE#TRPBF pinout, LTC3624EMSE#TRPBF application, or LTC3624EMSE#TRPBF equivalent, key selection criteria include its 2.25MHz operation enabling small external components, Burst Mode® for sub-10µA light-load IQ, and MODE/SYNC pin flexibility supporting pulse-skipping, forced continuous, or external clock synchronization - critical for noise-sensitive, space-constrained, and long-battery-life designs.
Technical Context
The LTC3624EMSE#TRPBF implements a constant-frequency peak current mode control architecture with internal compensation, delivering fast line and load transient response. Its 2.25MHz oscillator supports ±40% synchronization range and includes built-in soft-start (1ms), overtemperature protection, and VIN overvoltage lockout (19V).
It integrates complementary PMOS/NMOS power switches with 200mΩ top-side and 115mΩ bottom-side RDS(ON), operates from 2.7V–17V input, sustains 100% duty cycle in dropout, and uses a 0.6V reference for precise feedback regulation via external resistor divider on the FB pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 17V - supports wide-input industrial and battery-supplied systems including single-cell Li-ion up to 4S LiFePO₄. |
| Output Current | Up to 2A - delivers full rated current with thermal derating per θJA = 40°C/W in MSOP package. |
| Switching Frequency | 2.25MHz (±40% sync range) - enables use of sub-2.2µH inductors and 4.7µF–10µF ceramic output capacitors for minimal board area. |
| Quiescent Current | 3.5µA in shutdown; ~1.8mA in forced continuous mode - extends battery life in always-on sensor nodes and emergency radios. |
| Feedback Reference | 0.6V ±1% - allows precise output programming from 0.6V to VIN using standard resistor tolerances. |
| Output Accuracy | ±1% over line, load, and temperature - ensures stable MCU core or ADC reference rail without post-regulation trimming. |
| Thermal Rating | –40°C to 125°C junction - qualified for industrial and automotive under-hood auxiliary supplies with proper PCB copper pour. |
Pinout & Package
Package: 12-Lead Plastic MSOP with exposed thermal pad (Pin 13 = GND), footprint compatible with industry-standard MSOP-12 but requiring soldered exposed pad for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1, 2) | Switch node | Connects to inductor; carries high di/dt square-wave current - requires short, low-inductance trace and local ceramic bypass. |
| VIN (Pin 3, 4) | Main input supply | Accepts 2.7V–17V; powers internal LDO (INTVCC) and high-side switch - needs ≥10µF ceramic input capacitance placed adjacent to pins. |
| RUN (Pin 5) | Enable control | Active-high logic input; pulls low to disable regulator and reduce IQ to 0.1µA - must not float; internal pull-down provided. |
| PGOOD (Pin 6) | Power-good indicator | Open-drain output asserting high when VOUT is within ±7.5%; 32-cycle blanking prevents false triggers during transients. |
| FB (Pin 8) | Feedback sense | Connects to resistor divider tap; regulates output to 0.6V reference - high-impedance (10nA bias) for minimal divider current loss. |
| INTVCC (Pin 9) | Internal LDO output | 3.6V regulated supply for gate drivers and logic; requires ≥2.2µF ceramic bypass to GND for stability and noise immunity. |
| MODE/SYNC (Pin 10) | Operating mode select | Configures Burst Mode® (tie to INTVCC), pulse-skipping (tie to GND), or forced continuous/external sync (1V–VINTVCC–1.2V). |
| GND (Pins 11, 12, Exposed Pad 13) | Signal & power ground | All grounds tied internally; exposed pad must be soldered to large PCB copper area for thermal conduction and EMI reduction. |
| NC (Pin 7) | No connect | Internally unconnected; no electrical function - leave unconnected or tie to GND for mechanical stability only. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® operation | Reduces IQ to 3.5µA at light loads while maintaining regulation - extends battery runtime in intermittent-sensing applications by >10× vs forced continuous mode. |
| 2.25MHz fixed-frequency switching | Enables <2.2µH inductors and <10µF ceramic output caps - cuts solution size by >40% vs 500kHz alternatives without sacrificing efficiency. |
| 100% duty cycle dropout support | Maintains regulation down to VIN ≈ VOUT with ultralow IQ - critical for brownout resilience in Li-ion systems discharging to 3.0V. |
| Integrated soft-start (1ms) | Prevents inrush current and output overshoot during power-up - eliminates need for external timing components or sequencing controllers. |
| External clock synchronization | Locks switching to external source across ±40% range - eliminates beat frequencies in multi-rail systems and simplifies EMI filtering. |
| Overtemperature & overvoltage protection | Shuts down safely at TJ > 150°C or VIN > 19V - protects against thermal runaway and input transients without external circuitry. |
Applications
| Battery-Powered Portable Instrumentation | Emergency Radios |
|---|---|
Use Scenario: Handheld multimeters, gas detectors, and portable oscilloscopes operating from 2–3 alkaline cells or single Li-ion with standby durations >1 year. IC Role / Device Role / Timing Role: Primary step-down regulator generating 3.3V/2.5V rails for microcontroller, display, and analog front-end. Use Value: 3.5µA shutdown IQ and Burst Mode® extend battery life beyond 12 months; 2.25MHz operation minimizes solution size for handheld ergonomics. | Use Scenario: Self-contained emergency communication devices powered by AA batteries, requiring instant-on capability after long storage. IC Role / Device Role / Timing Role: Main power converter supplying 5V to RF transceiver and audio amplifier during transmit bursts. Use Value: 100% duty cycle operation maintains regulation as battery decays to 3.0V; PGOOD signal enables microcontroller wake-up only when rail is stable. |
| General Purpose Step-Down Supplies | Industrial Sensor Nodes |
Use Scenario: DIN-rail mounted PLC I/O modules converting 24VDC to 5V/3.3V for digital logic and isolation interfaces. IC Role / Device Role / Timing Role: Compact, efficient intermediate regulator replacing discrete buck controllers and external MOSFETs. Use Value: Integrated PMOS/NMOS switches and internal compensation eliminate 6+ external components; –40°C to 125°C rating ensures reliability in uncontrolled environments. | Use Scenario: Wireless vibration sensors deployed in factory machinery, powered by energy harvesters or coin cells with µW-level average power budgets. IC Role / Device Role / Timing Role: Ultra-low-IQ regulator powering MCU, ADC, and BLE radio in duty-cycled measurement cycles. Use Value: Sub-µA shutdown current and programmable light-load modes enable multi-year operation on a single CR2032 cell. |
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 | 1.8V–6.5V input; 0.6V–5.5V output; 1.8µA IQ; 2.25MHz; 1A output - lower current rating, narrower VIN range. | Suitable for ultra-low-power wearables and IoT endpoints where 1A suffices and input stays below 6.5V. | Select when system VIN never exceeds 6.5V and peak load ≤1A; offers lower IQ but lacks 17V tolerance and 2A capability. |
| MP2152GJ-Z | 4.5V–17V input; 0.8V–6V output; 25µA IQ; 2.2MHz; 2A output - higher light-load IQ, no Burst Mode®, no SYNC pin. | Fits cost-sensitive industrial supplies where moderate IQ is acceptable and external clock sync is unnecessary. | Choose for simpler BOM and lower unit cost if 25µA light-load IQ is acceptable and synchronization is not required. |
Compared with TPS62840DLCR and MP2152GJ-Z, the LTC3624EMSE#TRPBF uniquely combines 17V input tolerance, 2A output, 3.5µA shutdown IQ, Burst Mode®, and full SYNC capability - making it the only option meeting all four requirements simultaneously for demanding portable and industrial buck applications.
Availability
LTC3624EMSE#TRPBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, emergency communication devices, and industrial sensor nodes requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing.
Supply support for LTC3624EMSE#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 high-performance power management portfolio with rigorous qualification standards and long-term product commitments.
The LTC3624EMSE#TRPBF belongs to Linear's monolithic synchronous buck regulator family designed for ultra-low-quiescent-current, high-efficiency power conversion in space- and energy-constrained portable and industrial systems.
FAQ
What is the maximum input voltage rating for the LTC3624EMSE#TRPBF?
The LTC3624EMSE#TRPBF has an absolute maximum input voltage rating of 17V. Operation above this level risks permanent damage. Its VIN overvoltage lockout activates at 19V (rising) with 500mV hysteresis, suspending switching until VIN drops below 18.5V - protecting internal MOSFETs during transients. For reliable operation, keep steady-state VIN ≤17V and transient spikes within the OVP window.
Does the LTC3624EMSE#TRPBF support adjustable output voltage?
Yes, the LTC3624EMSE#TRPBF supports fully adjustable output voltage from 0.6V to VIN using an external resistor divider connected to the FB pin. The regulation equation is VOUT = 0.6V × (1 + R2/R1). This configuration is confirmed in the datasheet's Figure 1 and Electrical Characteristics table. Fixed-output variants (e.g., LTC3624EMSE-3.3#TRPBF) exist, but the base LTC3624EMSE#TRPBF is adjustable.
How does the MODE/SYNC pin configure operating modes on the LTC3624EMSE#TRPBF?
The MODE/SYNC pin on the LTC3624EMSE#TRPBF selects three distinct modes: tie to INTVCC for Burst Mode® (lowest IQ), tie to GND for pulse-skipping (lowest ripple), or apply 1V–VINTVCC–1.2V for forced continuous mode or external clock synchronization. Each setting directly controls the internal control logic - no external resistors or timing components are needed, and mode transitions occur within 2–3 clock cycles.
What thermal considerations apply to the LTC3624EMSE#TRPBF in its MSOP package?
The LTC3624EMSE#TRPBF in the 12-lead MSOP package has θJA = 40°C/W and θJC = 10°C/W. Its exposed pad (Pin 13) must be soldered to a minimum 100mm² PCB copper area for effective heat dissipation. Without proper thermal pad connection, junction temperature can exceed 125°C at full 2A load, triggering overtemperature shutdown. Thermal performance is validated per JEDEC JESD51-7 standards.
Is the LTC3624EMSE#TRPBF pin-compatible with other members of the LTC3624 family?
Yes, the LTC3624EMSE#TRPBF shares identical pinout and package (12-lead MSOP) with all other LTC3624-xMSE variants, including LTC3624EMSE-3.3#TRPBF and LTC3624EMSE-2#TRPBF. Pin functions, layout, and thermal pad requirements are identical across the family - enabling drop-in replacement for different output voltages or frequency options without PCB redesign.
LTC3624EMSE#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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-MSOP-EP
LTC3624EMSE#TRPBF FAQ
1.How can I place an order for LTC3624EMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3624EMSE#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#TRPBF reliable?
The price and inventory of LTC3624EMSE#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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3624EMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3624EMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3624EMSE#TRPBF?
LTC3624EMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3624EMSE#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#TRPBF?
For technical support, including LTC3624EMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3624EMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3624EMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3624EMSE#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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3624EMSE#TRPBF?
All LTC3624EMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3624EMSE#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#TRPBF part is unused and in its original packaging.
Return procedure for LTC3624EMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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