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Analog Devices Inc. LTC3624IMSE-5#TRPBF
- Part No.:
- LTC3624IMSE-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3624IMSE-5#TRPBF.pdf
- Description:
- IC REG BUCK 5V 2A 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,217
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Product details
Overview
LTC3624IMSE-5#TRPBF from Analog Devices (formerly Linear Technology) is a 2.25MHz, 2A synchronous step-down DC/DC regulator with fixed 5V output, operating from 2.7V to 17V input and delivering ±1% output voltage accuracy. It features ultralow 3.5µA quiescent current in Burst Mode, internal compensation, and overtemperature protection - designed for battery-powered portable instrumentation requiring high light-load efficiency and compact power delivery.
For engineers reviewing the LTC3624IMSE-5#TRPBF datasheet, LTC3624IMSE-5#TRPBF pinout, LTC3624IMSE-5#TRPBF application, or LTC3624IMSE-5#TRPBF equivalent, key selection criteria include its 2.25MHz switching frequency, 5V fixed output, 12-lead MSOP package with exposed thermal pad, and support for pulse-skipping, forced continuous, and Burst Mode® operation across wide input voltage and load ranges.
Technical Context
The LTC3624IMSE-5#TRPBF implements a constant-frequency peak current mode control architecture with internal slope compensation, enabling stable regulation at high duty cycles up to 100%. Its MODE/SYNC pin supports three operating modes: Burst Mode (for <3.5µA IQ), pulse-skipping (for low VOUT ripple), and forced continuous (for EMI-sensitive applications).
It integrates a PMOS high-side switch (200mΩ typical RDS(ON) at VIN = 5V) and NMOS low-side switch (115mΩ), with internal 3.6V LDO (INTVCC) powering gate drivers and logic. The device includes undervoltage lockout (2.6V threshold), overvoltage protection (19V trip), and PGOOD monitoring with ±7.5% window and 32-cycle blanking delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 2.25MHz fixed, synchronizable ±40% - enables compact 2.2µH inductor and small ceramic capacitors. |
| Output Voltage | Fixed 5.0V ±1% - eliminates external feedback divider; simplifies layout and improves accuracy vs adjustable versions. |
| Max Output Current | 2A continuous - supports moderate-power microcontrollers, sensors, and RF modules without external heatsinking. |
| Quiescent Current | 3.5µA in Burst Mode - extends battery life in always-on portable devices like emergency radios and handheld test gear. |
| Input Voltage Range | 2.7V to 17V - accommodates single-cell Li-ion (with boost pre-regulator), dual-cell alkaline, or 12V industrial rails. |
| Efficiency Peak | 95% at full load - minimizes thermal rise in sealed enclosures; achieved via synchronous rectification and low RDS(ON) switches. |
| Thermal Rating | –40°C to +125°C junction - qualified for industrial temperature grade (I-grade); θJA = 40°C/W in MSOP package. |
Pinout & Package
Package: 12-lead plastic MSOP with exposed thermal pad (Pin 13 = GND), optimized for thermal performance in space-constrained PCBs. Exposed pad must be soldered to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pins 1,2) | Switch node | Connects to inductor; carries high di/dt square wave - requires tight loop area and Kelvin routing to minimize EMI. |
| VIN (Pins 3,4) | Main input supply | Accepts 2.7V–17V; powers internal LDO and switches - bypass with ≥10µF ceramic capacitor near pin. |
| RUN (Pin 5) | Enable control | Logic-high (>1.0V) enables regulation; tie to VIN or microcontroller GPIO for power sequencing. |
| PGOOD (Pin 6) | Power-good indicator | Open-drain output pulled low if VOUT deviates >±7.5%; used for system reset or supervisor IC interfacing. |
| FB (Pin 8) | Feedback reference | Internally connected to 5V output - no external resistor divider required for fixed-output operation. |
| INTVCC (Pin 9) | Internal LDO output | 3.6V regulated supply for gate drivers; bypass with ≥2.2µF ceramic to GND for stability. |
| MODE/SYNC (Pin 10) | Operating mode select | GND = pulse-skipping; INTVCC = Burst Mode; 1V–2.4V = forced continuous; external clock = sync mode. |
| GND (Pins 11,12,13) | Signal & power ground | Exposes thermal pad (Pin 13) - must be soldered to large copper pour for thermal and electrical integrity. |
| NC (Pin 7) | No connect | Not bonded internally - leave unconnected; no routing or stitching required. |
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 edge sensors. |
| 100% duty cycle dropout | Enables regulation down to VIN ≈ VOUT + 0.1V - supports brownout operation in battery-depleted conditions. |
| Integrated soft-start | 1ms internal ramp prevents inrush current - eliminates need for external soft-start circuitry or timing components. |
| Overtemperature protection | Thermal shutdown at TJ > 150°C - protects against sustained overload or poor heatsinking without external sensor. |
| PGOOD with blanking | 32-cycle delay on falling edge suppresses false triggers during transient load steps - improves system reliability. |
Applications
| Portable Instrumentation | Battery-Powered Equipment |
|---|---|
Use Scenario: Handheld multimeter with LCD display, microcontroller, and analog front-end powered from two AA cells. IC Role / Device Role / Timing Role: Primary 5V system rail regulator, replacing inefficient linear regulators to extend battery runtime. Use Value: 3.5µA quiescent current preserves battery capacity during standby; 2.25MHz switching allows use of tiny 2.2µH inductor and 10µF input cap. | Use Scenario: Wireless sensor node with BLE SoC, environmental sensors, and coin-cell backup. IC Role / Device Role / Timing Role: Main 5V supply for digital subsystem when primary battery is active. Use Value: Burst Mode operation draws only 3.5µA between sensor readings - enabling >5-year operation on CR2032 primary cell. |
| Emergency Radios | General Purpose Step-Down Supplies |
Use Scenario: Manually cranked or solar-charged AM/FM radio with audio amplifier and microcontroller. IC Role / Device Role / Timing Role: Stable 5V rail for MCU, tuner IC, and Class D amplifier under highly variable input (3V–15V). Use Value: Wide 2.7V–17V input range accepts cranked generator output; 100% duty cycle maintains 5V even as input sags below 5.5V. | Use Scenario: Industrial control module requiring clean, efficient 5V for FPGA I/O banks and interface logic. IC Role / Device Role / Timing Role: Secondary point-of-load regulator fed from 12V intermediate bus. Use Value: 95% peak efficiency reduces heat in dense PCB layouts; PGOOD signal enables FPGA configuration lockstep with power-up sequence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62865RQYR | 2.5V–5.5V input; 5V fixed output; 2A; 2.25MHz; 1.2µA IQ - lower IQ but narrower VIN range. | Best for USB-powered or single-Li-ion systems; unsuitable for 12V industrial inputs. | Select when ultra-low IQ dominates and input is strictly ≤5.5V; verify thermal performance at 2A in 1.2mm QFN. |
| MP2315GJ-Z | 4.5V–28V input; 5V fixed; 2A; 500kHz; 25µA IQ - wider VIN but higher IQ and lower frequency. | Suitable for 24V automotive or industrial rails; requires larger inductor/capacitor due to 500kHz operation. | Choose for cost-sensitive 24V applications where board space is less constrained and 25µA IQ is acceptable. |
Compared with TPS62865RQYR and MP2315GJ-Z, the LTC3624IMSE-5#TRPBF uniquely balances 2.25MHz switching, 17V max input, and 3.5µA IQ - making it optimal for portable equipment bridging battery and 12V supply domains without sacrificing efficiency or footprint.
Availability
LTC3624IMSE-5#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, emergency radios, and battery-powered equipment requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.
Supply support for LTC3624IMSE-5#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 roadmaps.
The LTC3624IMSE-5#TRPBF belongs to the LTC® monolithic synchronous buck regulator family, engineered for high-efficiency, low-quiescent-current power conversion in space- and energy-constrained portable and industrial systems.
FAQ
What is the switching frequency of the LTC3624IMSE-5#TRPBF?
The LTC3624IMSE-5#TRPBF operates at a fixed 2.25MHz switching frequency, enabling compact external components including 2.2µH inductors and low-ESR ceramic capacitors. This frequency is factory-set for the -2 variant and can be synchronized to an external clock within ±40% (1.35MHz to 3.15MHz) via the MODE/SYNC pin. The 2.25MHz frequency is confirmed in the Electrical Characteristics table for I-grade MSOP packages.
Does the LTC3624IMSE-5#TRPBF require external feedback resistors?
No, the LTC3624IMSE-5#TRPBF does not require external feedback resistors because it is a fixed 5V output version. The FB pin is internally connected to the regulated 5V output, eliminating the need for a resistor divider. This simplifies design, improves accuracy (±1% over temperature), and reduces component count compared to adjustable versions like the LTC3624IMSE-2#TRPBF.
What is the quiescent current of the LTC3624IMSE-5#TRPBF in shutdown mode?
In shutdown mode (RUN pin pulled low), the LTC3624IMSE-5#TRPBF draws only 0.1µA typical input current, achieving zero-current shutdown. In Burst Mode operation (MODE/SYNC tied to INTVCC), it draws 3.5µA typical quiescent current from VIN while maintaining regulation - a key specification verified in the Electrical Characteristics table under IVIN parameter.
Can the LTC3624IMSE-5#TRPBF operate with input voltage below 5V?
Yes, the LTC3624IMSE-5#TRPBF supports input voltages as low as 2.7V and can regulate 5V output down to ~100% duty cycle when VIN approaches 5V. Its low dropout capability ensures stable 5V output even as input sags - for example, delivering full 2A at VIN = 5.2V. However, below VIN = 5.0V, output drops linearly per the dropout characteristic shown in Typical Performance Graph G02.
What thermal considerations apply to the LTC3624IMSE-5#TRPBF in MSOP package?
The LTC3624IMSE-5#TRPBF in 12-lead MSOP has θJA = 40°C/W and requires the exposed thermal pad (Pin 13) to be soldered to a minimum 100mm² PCB copper pour for rated performance. At 2A load and 12V input, power dissipation is ~0.4W; without proper thermal relief, junction temperature may exceed 125°C. The device includes overtemperature protection that disables switching above 150°C junction temperature.
LTC3624IMSE-5#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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- 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-5#TRPBF FAQ
1.How can I place an order for LTC3624IMSE-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3624IMSE-5#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-5#TRPBF reliable?
The price and inventory of LTC3624IMSE-5#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-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3624IMSE-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3624IMSE-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3624IMSE-5#TRPBF?
LTC3624IMSE-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3624IMSE-5#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-5#TRPBF?
For technical support, including LTC3624IMSE-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3624IMSE-5#TRPBF requirements.
6.How does Aetrix verify that LTC3624IMSE-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3624IMSE-5#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-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3624IMSE-5#TRPBF?
All LTC3624IMSE-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3624IMSE-5#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-5#TRPBF part is unused and in its original packaging.
Return procedure for LTC3624IMSE-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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