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Analog Devices Inc. LTC3624EMSE-23.3#PBF
- Part No.:
- LTC3624EMSE-23.3#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3624EMSE-23.3#PBF.pdf
- Description:
- IC REG BUCK 3.3V 2A 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,174
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Product details
Overview
LTC3624EMSE-23.3#PBF from Analog Devices (formerly Linear Technology) is a 2.25MHz, 3.3V fixed-output synchronous step-down regulator delivering up to 2A output current with 3.5µA quiescent current in shutdown mode. It operates from 2.7V to 17V input, supports 100% duty-cycle dropout operation, and features ±1% output voltage accuracy - ideal for battery-powered portable instrumentation requiring ultra-low-power standby.
For engineers reviewing the LTC3624EMSE-23.3#PBF datasheet, LTC3624EMSE-23.3#PBF pinout, LTC3624EMSE-23.3#PBF application, or LTC3624EMSE-23.3#PBF equivalent, key selection criteria include its 2.25MHz switching frequency, fixed 3.3V output, MSOP-12 package with exposed thermal pad, Burst Mode®/pulse-skipping/forced continuous mode control, and integrated overtemperature protection.
Technical Context
The LTC3624EMSE-23.3#PBF implements a constant-frequency peak current-mode control architecture with internal compensation, enabling stable regulation across wide input (2.7V–17V) and load (0–2A) ranges. Its 2.25MHz oscillator allows compact external components while maintaining high light-load efficiency via selectable operating modes.
It integrates dual MOSFET power switches (PMOS high-side, NMOS low-side), a 0.6V reference error amplifier, programmable MODE/SYNC interface for ripple-efficiency trade-off, and PGOOD monitoring with ±7.5% window and 32-cycle blanking delay - all within a thermally enhanced 12-lead MSOP package with exposed GND pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V with ±1% accuracy over temperature and line/load - ensures reliable logic-level supply for microcontrollers and sensors. |
| Switching Frequency | 2.25MHz ±20% (E/I-grade) - enables use of small inductors (e.g., 1.5–2.2µH) and ceramic capacitors for space-constrained designs. |
| Quiescent Current | 3.5µA in shutdown, 1.8mA typical in forced continuous mode - extends battery life in always-on emergency radios and portable medical devices. |
| Input Voltage Range | 2.7V to 17V - supports single-cell Li-ion (2.7–4.2V), 5V USB, and 12V industrial rails without external pre-regulation. |
| Output Current | Up to 2A continuous - sufficient for powering ARM Cortex-M MCUs, RF transceivers, and analog front-ends simultaneously. |
| Thermal Protection | Internal overtemperature shutdown with hysteresis - prevents thermal runaway during sustained overload or poor PCB heatsinking. |
| Feedback Reference | 0.6V internal reference - simplifies design for fixed-output variants like LTC3624EMSE-23.3#PBF where FB is shorted to VOUT. |
Pinout & Package
Package: 12-Lead Plastic MSOP with exposed thermal pad (Pin 13 = GND), rated for –40°C to 125°C 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 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 VIN or microcontroller GPIO for power sequencing. |
| PGOOD (Pin 6) | Power-good status indicator | Open-drain output pulled low if VOUT deviates >±7.5%; includes 32-cycle blanking to reject transient glitches. |
| FB (Pin 8) | Feedback input | Internally shorted to VOUT for fixed 3.3V operation - no external divider required. |
| INTVCC (Pin 9) | Built-in LDO output | 3.6V regulated supply for gate drivers; bypass with ≥2.2µF ceramic capacitor to GND. |
| MODE/SYNC (Pin 10) | Operating mode & sync input | Tie to INTVCC for Burst Mode® (lowest IQ), GND for pulse-skipping (lowest ripple), or external clock for synchronization. |
| GND (Pins 11,12,13) | Signal and power ground | Exposed pad (Pin 13) is primary thermal path - must be soldered to large PCB copper area. |
| NC (Pin 7) | No connect | Unbonded die pad - leave unconnected; no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow 3.5µA shutdown IQ | Enables multi-year battery life in maintenance-free remote sensors and emergency beacons. |
| 2.25MHz fixed-frequency operation | Reduces solution size by >40% vs 1MHz equivalents - critical for wearables and handheld test gear. |
| Three selectable operating modes | Burst Mode® (max efficiency), pulse-skipping (min ripple), forced continuous (predictable EMI) - configurable without external components. |
| 100% duty-cycle dropout capability | Maintains regulation down to VIN = VOUT - essential for Li-ion systems operating near end-of-discharge. |
| Integrated soft-start (1ms) | Prevents inrush current during power-up - eliminates need for external timing components or sequencing controllers. |
| ±7.5% PGOOD accuracy with blanking | Ensures reliable system reset and brown-out detection without false triggers during dynamic load steps. |
Applications
| Battery-Powered Portable Instrumentation | Emergency Radios & Beacon Transmitters |
|---|---|
Use Scenario: Handheld multimeter or gas detector operating from single Li-ion cell with intermittent measurement cycles. IC Role / Device Role / Timing Role: Primary 3.3V system supply regulating down from 2.7–4.2V battery, managing sleep/wake transitions via RUN pin. Use Value: 3.5µA shutdown IQ extends shelf life beyond 5 years; 2.25MHz switching allows <2mm² total DC/DC footprint including inductor and caps. |
Use Scenario: GPS-enabled personal locator beacon (PLB) requiring instant wake-up and burst transmission under low-battery conditions. IC Role / Device Role / Timing Role: Fixed 3.3V rail for MCU, GNSS receiver, and UHF transmitter - maintains regulation even at 3.0V input (100% duty cycle). Use Value: Burst Mode® delivers >85% efficiency at 100µA load, enabling weeks of standby on a 1000mAh cell without compromising transmit power. |
| Industrial Sensor Nodes | Low-Power IoT Edge Controllers |
Use Scenario: Wireless vibration sensor node deployed in remote machinery with 10-year battery target and periodic BLE reporting. IC Role / Device Role / Timing Role: Main power converter supplying 3.3V to ultra-low-power MCU and MEMS accelerometer - synchronized to system clock via MODE/SYNC pin. Use Value: 2.25MHz sync capability eliminates beat frequencies with wireless radios; ±1% VOUT accuracy ensures consistent ADC reference stability. |
Use Scenario: Smart building controller aggregating Zigbee/Z-Wave sensors, powered by backup coin cell during AC failure. IC Role / Device Role / Timing Role: Always-on 3.3V supply enabling fast wake-from-sleep response; PGOOD monitors health before initiating firmware updates. Use Value: Internal soft-start and overtemperature protection prevent latch-up during cold-start or enclosure overheating - critical for unattended deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62840DLCR | 2.4V–6V input range, 800mA output, 0.35µA IQ - narrower VIN, lower current, lower IQ. | Suitable only for sub-1A loads and ≤6V inputs; not viable for 12V industrial or automotive inputs. | Select when ultra-low IQ (<1µA) and small size outweigh input flexibility and current capability. |
| MP2152GQZ-P | 4.5V–17V input, 2A output, 25µA IQ, 2MHz switching - higher IQ, same package footprint. | Higher light-load IQ reduces battery runtime in multi-year deployments; lacks Burst Mode® optimization. | Choose for cost-sensitive industrial supplies where 25µA IQ is acceptable and external mode control is acceptable. |
Compared with TPS62840DLCR and MP2152GQZ-P, the LTC3624EMSE-23.3#PBF uniquely balances 2A capability, 2.25MHz frequency, 3.5µA IQ, and 2.7–17V input range in a thermally robust MSOP package - making it optimal for long-life, wide-input, medium-current portable systems.
Availability
LTC3624EMSE-23.3#PBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, emergency communication devices, and industrial sensor nodes requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LTC3624EMSE-23.3#PBF 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 reliability testing and military-grade qualification standards.
The LTC3624 product line targets ultra-low-quiescent-current DC/DC conversion for energy-constrained portable and battery-backed systems - emphasizing efficiency across full load range, thermal resilience, and ease of integration.
FAQ
What is the maximum input voltage rating for the LTC3624EMSE-23.3#PBF?
The LTC3624EMSE-23.3#PBF has an absolute maximum input voltage rating of 17V. Operation above this level risks permanent damage. The device also includes VIN overvoltage lockout that suspends switching when VIN exceeds 19V and resumes at 18.5V, protecting internal MOSFETs from transient spikes.
Does the LTC3624EMSE-23.3#PBF require external feedback resistors?
No. The LTC3624EMSE-23.3#PBF is a fixed 3.3V output variant - the FB pin is internally connected to VOUT, eliminating the need for external resistor dividers. This simplifies layout, improves accuracy by removing resistor tolerance errors, and reduces BOM count compared to adjustable versions.
How does the MODE/SYNC pin configure operating modes on the LTC3624EMSE-23.3#PBF?
The MODE/SYNC pin configures three modes: tie to INTVCC for Burst Mode® (3.5µA IQ, 800mA peak clamp), ground for pulse-skipping (lowest output ripple), or apply external clock (2.25MHz ±40%) for forced continuous synchronization. No pull-up/down resistors are needed - direct connection suffices.
What thermal considerations apply to the LTC3624EMSE-23.3#PBF in MSOP package?
The LTC3624EMSE-23.3#PBF uses a 12-lead MSOP with exposed GND pad (Pin 13). For rated thermal performance (θJA = 40°C/W), this pad must be soldered to a minimum 100mm² PCB copper area connected to internal ground planes. Failure to do so risks exceeding 125°C junction temperature under 2A load.
Is the LTC3624EMSE-23.3#PBF RoHS-compliant and lead-free?
Yes. The "#PBF" suffix denotes lead-free finish per JEDEC J-STD-020. The LTC3624EMSE-23.3#PBF meets RoHS Directive 2011/65/EU and is compatible with standard Pb-free reflow profiles. Part marking "362423" confirms the MSOP-12 package and 3.3V fixed output variant.
LTC3624EMSE-23.3#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- 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):
- 3.3V
- Voltage - Output (Max):
- -
- 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-23.3#PBF FAQ
1.How can I place an order for LTC3624EMSE-23.3#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3624EMSE-23.3#PBF 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-23.3#PBF reliable?
The price and inventory of LTC3624EMSE-23.3#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3624EMSE-23.3#PBF is usually 5 days.
3.What payment methods are accepted for LTC3624EMSE-23.3#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3624EMSE-23.3#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3624EMSE-23.3#PBF?
LTC3624EMSE-23.3#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3624EMSE-23.3#PBF 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-23.3#PBF?
For technical support, including LTC3624EMSE-23.3#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3624EMSE-23.3#PBF requirements.
6.How does Aetrix verify that LTC3624EMSE-23.3#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3624EMSE-23.3#PBF 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-23.3#PBF meets industry standards.
7.What is the process for return or replacement of LTC3624EMSE-23.3#PBF?
All LTC3624EMSE-23.3#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3624EMSE-23.3#PBF, 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-23.3#PBF part is unused and in its original packaging.
Return procedure for LTC3624EMSE-23.3#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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