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Analog Devices Inc. LTC3624EMSE-2#TRPBF
- Part No.:
- LTC3624EMSE-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3624EMSE-2#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 2A 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,909
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Product details
Overview
LTC3624EMSE-2#TRPBF from Analog Devices (formerly Linear Technology) is a 17V, 2A synchronous step-down regulator in a 12-lead MSOP package, featuring 2.25MHz fixed switching frequency, 3.5µA quiescent current in Burst Mode, and adjustable 0.6V–VIN output voltage. It delivers high efficiency across wide input (2.7V–17V) and load ranges, targeting battery-powered instrumentation and portable radios.
For engineers reviewing the LTC3624EMSE-2#TRPBF datasheet, LTC3624EMSE-2#TRPBF pinout, LTC3624EMSE-2#TRPBF application, or LTC3624EMSE-2#TRPBF equivalent, key selection criteria include ultralow IQ operation, 2.25MHz sync capability, ±1% VFB accuracy, dropout performance at 100% duty cycle, and thermal management via exposed pad grounding.
Technical Context
The LTC3624EMSE-2#TRPBF employs constant-frequency peak current mode control with internal compensation, enabling fast line/load transient response and stable regulation across 2.7V–17V input. Its 2.25MHz oscillator supports ±40% external synchronization via the MODE/SYNC pin, and it maintains ±1% output voltage accuracy over temperature and load.
Burst Mode operation (MODE/SYNC tied to INTVCC) enables 3.5µA quiescent current at light loads, while pulse-skipping (MODE/SYNC grounded) minimizes output ripple. Forced continuous mode (MODE/SYNC biased between 1V and VINTVCC–1.2V) ensures fixed-frequency operation down to zero load, with –266mA minimum peak current limit.
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 Voltage Range | 0.6V to VIN - enables adjustable low-voltage logic supplies (e.g., 1.2V, 1.8V, 3.3V) without external reference. |
| Switching Frequency | 2.25MHz (±40% sync range) - allows compact 2.2µH inductors and reduces EMI filtering burden in space-constrained designs. |
| Quiescent Current | 3.5µA in Burst Mode - extends battery life in always-on portable devices such as emergency radios and handheld meters. |
| Output Accuracy | ±1% over temperature and load - ensures reliable power sequencing and ADC reference stability in precision instrumentation. |
| Peak Current Limit | 2.4A (E-grade) - provides robust short-circuit protection while sustaining 2A continuous output under thermal limits. |
| Thermal Shutdown | 150°C junction limit - protects against sustained overload or poor PCB heatsinking in sealed enclosures. |
Pinout & Package
Package: 12-Lead Plastic MSOP (3mm × 4.4mm) with exposed thermal pad (Pin 13), rated for –40°C to 125°C operating junction temperature. Exposed pad must be soldered to PCB ground for electrical integrity and thermal performance (θJA = 40°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pins 1,2) | Switch node connection | Drives external inductor; requires low-inductance layout to minimize ringing and EMI in 2.25MHz operation. |
| VIN (Pins 3,4) | Main input supply | Accepts 2.7V–17V; bypassed internally by INTVCC LDO and externally by ≥10µF ceramic capacitor near pins. |
| RUN (Pin 5) | Enable control input | Active-high logic; must not float - tie to VIN or microcontroller GPIO to manage system power sequencing. |
| PGOOD (Pin 6) | Power-good status indicator | Open-drain output pulled low if VOUT deviates >±7.5%; includes 32-cycle blanking to suppress transient glitches. |
| FB (Pin 8) | Feedback voltage sense | Connects to resistor divider for adjustable output; 0.6V reference enables precise VOUT programming per VOUT = 0.6V × (1 + R2/R1). |
| INTVCC (Pin 9) | Internal LDO output | 3.6V regulated supply for gate drivers and internal circuitry; requires ≥2.2µF ceramic bypass to GND. |
| MODE/SYNC (Pin 10) | Operating mode select / clock sync | Configures Burst Mode (to INTVCC), pulse-skipping (to GND), forced continuous (1V–VINTVCC–1.2V), or external clock sync. |
| GND (Pins 11,12,13) | Signal and power ground | Exposes thermal pad (Pin 13); mandatory solder connection to PCB ground plane for thermal dissipation and noise immunity. |
| NC (Pin 7) | No connect | Unbonded pin - leave unconnected; no electrical function or internal connection. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 3.5µA in Burst Mode enables multi-year battery life in always-on IoT sensors and portable medical devices. |
| 2.25MHz fixed-frequency operation | Enables use of sub-3mm inductors and reduces solution footprint by >40% vs 1MHz alternatives in handheld designs. |
| 100% duty cycle dropout support | Maintains regulation down to VIN ≈ VOUT, critical for Li-ion battery discharge curves in portable instrumentation. |
| Internal soft-start (1ms) | Prevents inrush current and output overshoot during power-up, eliminating need for external timing components. |
| Overtemperature and overvoltage protection | Auto-recovering shutdown at 150°C junction and VIN >19V prevents damage during fault conditions without external supervision. |
Applications
| Battery-Powered Instrumentation | Emergency Radios |
|---|---|
Use Scenario: Portable multimeters and handheld oscilloscopes powered by dual AA/AAA cells or single Li-ion cell. IC Role / Device Role / Timing Role: Primary DC/DC converter regulating 3.3V or 1.8V from 2.7V–4.2V battery input. Use Value: 3.5µA quiescent current extends shelf life and runtime; 2.25MHz switching allows compact 2.2µH inductor and minimal PCB area. | Use Scenario: Hand-crank or solar-charged emergency communication radios requiring long standby time and instant wake-up. IC Role / Device Role / Timing Role: Main system supply delivering 5V/3.3V from variable 3V–12V input sources. Use Value: Burst Mode operation sustains >1-year battery life in standby; 100% duty cycle maintains output during deep battery discharge. |
| Portable Medical Sensors | Low-Power Industrial Controllers |
Use Scenario: Wearable ECG monitors and glucose meters using coin-cell or small LiPo batteries. IC Role / Device Role / Timing Role: Efficient step-down regulator powering MCU, analog front-end, and BLE radio from 3V input. Use Value: ±1% output accuracy ensures stable ADC reference and sensor biasing; low IQ preserves battery capacity between periodic measurements. | Use Scenario: Remote environmental sensors deployed in field locations with limited energy harvesting or battery replacement access. IC Role / Device Role / Timing Role: Primary power supply converting 12V rail or supercapacitor output to 3.3V logic voltage. Use Value: 17V absolute max rating tolerates automotive transients; SYNC capability allows EMI reduction via spread-spectrum clock alignment. |
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, 0.6V–5.5V output, 1.8µA IQ, 2.25MHz, 1A output - lower current rating and narrower VIN range. | Suitable only for sub-1A loads and ≤6V input systems; lacks 17V rating and 100% duty cycle. | Select when ultra-low IQ (<2µA) is primary requirement and input stays below 6V. |
| MAX20077ATC+T | 3.5V–36V input, 0.8V–5.5V output, 2.5µA IQ, 2.1MHz, 2A output - higher VIN max, but no Burst Mode and only ±2% VREF accuracy. | Better for automotive 24V systems; less suitable for precision analog supplies due to looser feedback tolerance. | Choose for harsher input environments where 36V rating and AEC-Q100 qualification are required. |
Compared with TPS62840DLCR and MAX20077ATC+T, the LTC3624EMSE-2#TRPBF uniquely combines 17V input capability, 2.25MHz operation, 3.5µA IQ, and ±1% output accuracy in a thermally enhanced MSOP package - making it optimal for portable instrumentation requiring both precision and extended battery life.
Availability
LTC3624EMSE-2#TRPBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, emergency radios, portable medical sensors, and low-power industrial controllers requiring stable component supply and long-term lifecycle support.
Supply support for LTC3624EMSE-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 high-performance power management portfolio with rigorous testing and long-term product commitments.
The LTC3624 family is designed for ultralow-power, high-efficiency step-down conversion in portable and battery-critical applications - emphasizing quiescent current optimization, wide input range, and thermal robustness in compact packages.
FAQ
What is the switching frequency of the LTC3624EMSE-2#TRPBF?
The LTC3624EMSE-2#TRPBF operates at a fixed 2.25MHz switching frequency, with ±40% synchronization range via the MODE/SYNC pin. This frequency is factory-set and distinguishes it from the 1MHz LTC3624 variant. The 2.25MHz operation enables smaller external magnetics and reduced output capacitance, supporting compact designs in portable equipment where board space is constrained. Frequency stability is maintained across temperature and input voltage variations per datasheet specifications.
How does the MODE/SYNC pin configure operating modes on the LTC3624EMSE-2#TRPBF?
The MODE/SYNC pin on the LTC3624EMSE-2#TRPBF selects among four functional states: tying to INTVCC enables Burst Mode (3.5µA IQ, 800mA peak clamp), grounding enables pulse-skipping (low ripple), biasing between 1V and VINTVCC–1.2V enables forced continuous mode (fixed frequency down to zero load), and applying an external clock synchronizes switching within ±40% of 2.25MHz. Each configuration directly alters control loop behavior and efficiency/ripple trade-offs without external components.
What is the maximum output current capability of the LTC3624EMSE-2#TRPBF?
The LTC3624EMSE-2#TRPBF is rated for up to 2A of continuous output current under proper thermal conditions - specifically with the exposed pad soldered to a sufficient PCB copper area. Electrical characteristics specify a peak current limit of 2.4A for E-grade parts (which LTC3624EMSE-2#TRPBF is), ensuring robust short-circuit handling. Actual deliverable current depends on ambient temperature, PCB layout, and input/output voltage differentials per the thermal derating curves in the datasheet.
Does the LTC3624EMSE-2#TRPBF support 100% duty cycle operation?
Yes, the LTC3624EMSE-2#TRPBF supports 100% duty cycle operation, enabling regulation even when input voltage approaches the output voltage - critical for maintaining power during deep battery discharge. This capability is active in all operating modes (Burst, pulse-skipping, forced continuous) and is implemented via internal circuitry that maintains accurate peak current limiting at high duty cycles. Dropout performance is verified across temperature and load per the "High Duty Cycle/Dropout Operation" section of the datasheet.
What package type and thermal characteristics apply to the LTC3624EMSE-2#TRPBF?
The LTC3624EMSE-2#TRPBF uses a 12-lead plastic MSOP package (3mm × 4.4mm) with an exposed thermal pad (Pin 13). Its thermal resistance is θJA = 40°C/W and θJC = 10°C/W, with maximum junction temperature rated at 125°C for the E-grade version. Reliable thermal performance requires soldering the exposed pad to a dedicated PCB ground plane; failure to do so degrades power handling and may trigger premature thermal shutdown during sustained 2A operation.
LTC3624EMSE-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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-MSOP-EP
LTC3624EMSE-2#TRPBF FAQ
1.How can I place an order for LTC3624EMSE-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3624EMSE-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 LTC3624EMSE-2#TRPBF reliable?
The price and inventory of LTC3624EMSE-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 LTC3624EMSE-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3624EMSE-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3624EMSE-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3624EMSE-2#TRPBF?
LTC3624EMSE-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3624EMSE-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 LTC3624EMSE-2#TRPBF?
For technical support, including LTC3624EMSE-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3624EMSE-2#TRPBF requirements.
6.How does Aetrix verify that LTC3624EMSE-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3624EMSE-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 LTC3624EMSE-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3624EMSE-2#TRPBF?
All LTC3624EMSE-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3624EMSE-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 LTC3624EMSE-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC3624EMSE-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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