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Analog Devices Inc. LTC3624IMSE#TRPBF
- Part No.:
- LTC3624IMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3624IMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 2A 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,211
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Product details
Overview
LTC3624IMSE#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. It delivers adjustable output from 0.6V to VIN, features 3.5µA quiescent current in shutdown, ±1% output voltage accuracy, and supports Burst Mode®, pulse-skipping, and forced continuous operation - ideal for battery-powered portable instrumentation requiring ultra-low IQ and compact power conversion.
For engineers reviewing the LTC3624IMSE#TRPBF datasheet, LTC3624IMSE#TRPBF pinout, LTC3624IMSE#TRPBF application, or LTC3624IMSE#TRPBF equivalent, key selection criteria include its 2.25MHz high-frequency operation enabling small external components, ultralow 3.5µA shutdown current for extended battery life, and MODE/SYNC pin configurability for ripple-efficiency trade-offs in space-constrained embedded systems.
Technical Context
The LTC3624IMSE#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. Its 2.25MHz oscillator enables use of sub-3mm inductors and ceramic capacitors while maintaining 95% peak efficiency.
It integrates dual MOSFETs (115mΩ NMOS / 200mΩ PMOS), 0.6V reference with ±1% accuracy, overtemperature protection, and programmable operation modes via the MODE/SYNC pin - allowing selection between Burst Mode (800mA clamp, 3.5µA IQ), pulse-skipping (132mA clamp, low ripple), or forced continuous mode (–266mA min peak current, zero-load capable).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 17V - supports wide-input industrial and battery-supplied systems including 12V rails and Li-ion stacks. |
| Output Current | Up to 2A - sufficient for powering microcontrollers, sensors, and RF modules without external boost stages. |
| Switching Frequency | 2.25MHz (±40% sync range) - enables compact 2.2µH inductors and 4.7µF–22µF ceramic output caps, reducing board area. |
| Quiescent Current | 3.5µA in shutdown - extends shelf life and runtime in always-on, low-duty-cycle IoT endpoints. |
| Output Accuracy | ±1% over temperature - ensures reliable ADC reference, sensor biasing, and logic supply stability without calibration. |
| Duty Cycle Range | 0% to 100% - supports dropout operation down to VOUT = VIN with regulated low-IQ performance. |
| Feedback Reference | 0.6V ±1% - simplifies resistor-divider design for custom VOUT; fixed versions omit divider entirely. |
Pinout & Package
Package: 12-Lead Plastic MSOP (3mm × 4.4mm) with exposed thermal pad (Pin 13 = GND). Requires soldering of exposed pad to PCB ground plane for thermal performance (θJA = 40°C/W, θJC = 10°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pins 1,2) | Switch node connection | Drives external inductor; requires low-inductance layout to minimize EMI and switching losses. |
| VIN (Pins 3,4) | Main input supply | Accepts 2.7V–17V; bypass with ≥10µF ceramic capacitor close to pins to suppress high-frequency noise. |
| RUN (Pin 5) | Enable control input | Logic-high (>1.0V) enables regulation; tie to GND or leave floating (via pull-down) to disable with <0.1µA leakage. |
| PGOOD (Pin 6) | Power-good open-drain flag | Asserts high when VOUT is within ±7.5%; includes 32-cycle blanking to reject transient excursions. |
| FB (Pin 8) | Feedback input | Senses resistive divider output; sets VOUT = 0.6V × (1 + R2/R1); connect directly to VOUT for fixed-output variants. |
| INTVCC (Pin 9) | Internal LDO output | Provides ~3.6V bias for gate drivers; bypass with ≥2.2µF ceramic to GND for stability. |
| MODE/SYNC (Pin 10) | Operation mode & sync input | Tie to INTVCC → Burst Mode; to GND → pulse-skipping; to 1V–(VINTVCC–1.2V) → forced continuous; accept external clock for sync. |
| GND (Pins 11,12,13) | Signal & power ground | Exposed pad (Pin 13) must be soldered to PCB ground plane for thermal and electrical integrity. |
| NC (Pin 7) | No connect | Internally unconnected; no routing or termination required. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow shutdown IQ | 0.1µA typical - enables multi-year battery life in maintenance-free remote sensors. |
| High-frequency 2.25MHz operation | Reduces inductor size by >50% vs 1MHz parts, enabling <3mm × 3mm total solution footprint. |
| Three selectable operating modes | Burst Mode (3.5µA IQ), pulse-skipping (low ripple), forced continuous (zero-load stable) - configurable per system needs. |
| Integrated 0.6V reference with ±1% accuracy | Eliminates need for external precision references; supports tight-tolerance analog subsystems. |
| 100% duty cycle capability | Maintains regulation during input voltage droop to VOUT, critical for brownout resilience in battery discharge profiles. |
| Internal soft-start (1ms) | Prevents inrush current and output overshoot during power-up; eliminates need for external timing components. |
Applications
| Battery-Powered Portable Instrumentation | Emergency Radio Power Management |
|---|---|
Use Scenario: Handheld multimeters, portable gas analyzers, and field-deployable data loggers powered by single-cell Li-ion or alkaline batteries. IC Role / Device Role / Timing Role: Primary 2A step-down regulator delivering stable 3.3V or adjustable rail to MCU, ADC, and wireless transceiver. Use Value: 3.5µA shutdown current extends shelf life beyond 10 years; 2.25MHz operation allows use of tiny 2.2µH shielded inductors and 10µF X7R ceramics. | Use Scenario: Compact emergency radios requiring long-term storage and instant-on operation from primary lithium or NiMH cells. IC Role / Device Role / Timing Role: High-efficiency buck converter supplying 5V to audio amplifier and 3.3V to digital baseband IC under variable load (standby vs transmit). Use Value: Burst Mode operation maintains >85% efficiency at 100µA loads; PGOOD flag enables automatic battery-level warning before cutoff. |
| Low-Power Industrial Sensor Nodes | Space-Constrained Embedded Controllers |
Use Scenario: Wireless vibration sensors and environmental monitors mounted on rotating machinery or inside enclosures with strict thermal limits. IC Role / Device Role / Timing Role: Regulator for ultra-low-power MCU (e.g., ARM Cortex-M0+) and MEMS accelerometer, operating intermittently with 10s–hour sleep cycles. Use Value: 0.1µA shutdown leakage prevents battery drain during multi-month idle periods; MSOP package fits 8mm × 8mm PCB real estate. | Use Scenario: Edge AI inference modules in smart cameras or PLC I/O cards where board height and thermal density are constrained. IC Role / Device Role / Timing Role: Point-of-load regulator for FPGA core voltage (e.g., 1.0V @ 1.8A) adjacent to high-speed interfaces. Use Value: Forced continuous mode ensures zero-output-load stability; 2.25MHz switching avoids interference with USB 2.0 or MIPI clock bands. |
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, 1.8A max, 1.8MHz, 300nA IQ in shutdown | Lower VIN range; optimized for single-cell Li-ion only; lacks sync capability and 100% duty cycle | Choose for ultra-low-IQ single-cell apps where 17V rating is unnecessary and footprint is tighter. |
| MAX20077ATC+T | 3.5V–36V input, 2A, 2.1MHz, 2.5µA IQ, AEC-Q100 grade | Automotive-qualified; higher VIN; slightly higher IQ; no Burst Mode, only pulse-frequency modulation | Choose for automotive body electronics requiring qualification and wider input tolerance. |
Compared with TPS62840DLCR and MAX20077ATC+T, the LTC3624IMSE#TRPBF uniquely combines 17V input capability, true 100% duty cycle dropout, and three distinct low-power modes - making it optimal for industrial battery systems needing both wide VIN and nanoscale shutdown IQ.
Availability
LTC3624IMSE#TRPBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, emergency radio power management, and low-power industrial sensor nodes requiring stable component supply across extended production lifecycles.
Supply support for LTC3624IMSE#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 testing and long-term product commitments.
The LTC3624IMSE#TRPBF belongs to Linear's monolithic synchronous buck regulator family, designed specifically for space- and power-constrained applications demanding ultralow quiescent current, high-frequency operation, and robust light-load efficiency.
FAQ
What is the maximum input voltage rating for the LTC3624IMSE#TRPBF?
The LTC3624IMSE#TRPBF has an absolute maximum input voltage rating of 17V. Operation above this level risks permanent damage. Its recommended operating range is 2.7V to 17V, with overvoltage lockout engaging at 19V (rising) and releasing at 18.5V (falling) to protect internal MOSFETs. This makes the LTC3624IMSE#TRPBF suitable for 12V nominal systems with transient spikes but not for 24V industrial rails.
How does the MODE/SYNC pin configure operating modes on the LTC3624IMSE#TRPBF?
The MODE/SYNC pin on the LTC3624IMSE#TRPBF selects among three operational modes: tie to INTVCC for Burst Mode (3.5µA IQ, 800mA peak clamp), tie to GND for pulse-skipping (lower ripple, 132mA clamp), or apply 1.0V–(VINTVCC–1.2V) for forced continuous mode (–266mA min peak, zero-load stable). It also accepts external clocks for synchronization within ±40% of 2.25MHz. This configurability is central to optimizing the LTC3624IMSE#TRPBF for specific system trade-offs.
Does the LTC3624IMSE#TRPBF support 100% duty cycle operation, and what is its significance?
Yes, the LTC3624IMSE#TRPBF supports true 100% duty cycle operation, enabling regulation even when VIN drops to VOUT. This is critical for battery-powered systems where input voltage decays over time - such as Li-ion discharging from 4.2V to 3.0V - ensuring uninterrupted power to downstream circuitry without brownout. The LTC3624IMSE#TRPBF maintains ultralow IQ (<1µA) even in dropout, distinguishing it from many competitors that disable or increase leakage under low-VIN conditions.
What is the purpose of the PGOOD pin on the LTC3624IMSE#TRPBF, and how is it implemented?
The PGOOD pin on the LTC3624IMSE#TRPBF is an open-drain output that asserts high when VOUT is within ±7.5% of its target value. It features a 32-cycle blanking delay on the falling edge to prevent false triggering during load transients. An internal 280Ω pull-down ensures reliable low-state assertion. This enables safe sequencing in multi-rail systems and battery health monitoring - for example, asserting a host MCU interrupt when LTC3624IMSE#TRPBF output falls out of regulation due to cell depletion.
Can the LTC3624IMSE#TRPBF be synchronized to an external clock, and what is the valid frequency range?
Yes, the LTC3624IMSE#TRPBF can be synchronized to an external clock applied to the MODE/SYNC pin. The valid sync range is ±40% of its nominal 2.25MHz frequency - i.e., 1.35MHz to 3.15MHz. Sync engagement occurs within 2–3 external clock cycles; loss of sync is detected after ~2µs of no edges. This capability allows noise-sensitive systems (e.g., medical sensors or audio amplifiers) to avoid switching frequency interference by aligning the LTC3624IMSE#TRPBF to a system master clock.
LTC3624IMSE#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
LTC3624IMSE#TRPBF FAQ
1.How can I place an order for LTC3624IMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3624IMSE#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#TRPBF reliable?
The price and inventory of LTC3624IMSE#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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3624IMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3624IMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3624IMSE#TRPBF?
LTC3624IMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3624IMSE#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#TRPBF?
For technical support, including LTC3624IMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3624IMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3624IMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3624IMSE#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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3624IMSE#TRPBF?
All LTC3624IMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3624IMSE#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#TRPBF part is unused and in its original packaging.
Return procedure for LTC3624IMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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