My Inquiry
My Account
Analog Devices Inc. LTC3624IMSE-3.3#TRPBF
- Part No.:
- LTC3624IMSE-3.3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3624IMSE-3.3#TRPBF.pdf
- Description:
- IC REG BUCK 3.3V 2A 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,491
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3624IMSE-3.3#TRPBF from Analog Devices (formerly Linear Technology) is a 17V, 2A synchronous step-down DC/DC regulator in a 12-lead MSOP package with fixed 3.3V output, 1MHz switching frequency, ±1% output voltage accuracy, and 3.5µA quiescent current in shutdown-designed for battery-powered portable instrumentation requiring high light-load efficiency and low dropout operation.
For engineers reviewing the LTC3624IMSE-3.3#TRPBF datasheet, LTC3624IMSE-3.3#TRPBF pinout, LTC3624IMSE-3.3#TRPBF application, or LTC3624IMSE-3.3#TRPBF equivalent, key selection criteria include its fixed 3.3V output, 1MHz constant-frequency operation, Burst Mode® capability for ultralow IQ, internal compensation, and thermal performance in the –40°C to 125°C industrial temperature range.
Technical Context
The LTC3624IMSE-3.3#TRPBF employs a peak current mode control architecture with internal slope compensation, enabling stable regulation across wide input (2.7V–17V) and load (0–2A) ranges. Its fixed 1MHz oscillator supports ±40% external synchronization via the MODE/SYNC pin, and it integrates an internal 3.6V LDO (INTVCC) for gate drive.
Operation includes three selectable modes: Burst Mode® (3.5µA IQ, 800mA peak clamp), pulse-skipping (low ripple), and forced continuous (stable frequency at zero load). Overtemperature protection, VIN overvoltage lockout (19V trip), and undervoltage lockout (2.7V) are built-in, with PGOOD monitoring output voltage within ±7.5% of 3.3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% (ensures stable logic supply for microcontrollers and sensors) |
| Input Voltage Range | 2.7V to 17V (supports single-cell Li-ion up to 12V industrial rails) |
| Max Output Current | 2A continuous (sufficient for FPGA I/O banks or multi-rail PMIC front-end) |
| Quiescent Current | 3.5µA in shutdown (enables >1-year battery life in emergency radios) |
| Switching Frequency | 1MHz ±8% (enables compact 2.2µH inductor and <10mm² solution size) |
| Efficiency Peak | 95% at 1A/5VIN (minimizes thermal rise in sealed enclosures) |
| Thermal Range | –40°C to +125°C junction (qualified for industrial embedded systems) |
Pinout & Package
Package: 12-lead plastic MSOP (3mm × 4.1mm) with exposed pad (Pin 13 = GND), rated θJA = 40°C/W, θJC = 10°C/W. Exposed pad must be soldered to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch node | Connects to inductor; carries high di/dt square wave-requires tight layout and Kelvin return path |
| VIN (Pins 3,4) | Main input supply | Accepts 2.7V–17V; bypass with ≥10µF ceramic close to pins to suppress switching noise |
| RUN (Pin 5) | Enable control | Logic-high (>1.0V) enables regulation; tie to GND or open for shutdown (0.1µA leakage) |
| PGOOD (Pin 6) | Power-good indicator | Open-drain output pulled low if VOUT deviates >±7.5% from 3.3V; 32-cycle blanking prevents transient glitches |
| FB (Pin 8) | Feedback reference | Internally tied to 3.3V output (fixed version); no external divider required |
| INTVCC (Pin 9) | Internal LDO output | 3.6V regulated supply for gate drivers; bypass with ≥2.2µF ceramic to GND |
| MODE/SYNC (Pin 10) | Mode selection & sync input | Tie to INTVCC for Burst Mode®, GND for pulse-skipping, or 1V–2.4V for forced continuous; accepts external clock up to ±40% of 1MHz |
| GND (Pins 11,12,13) | Signal & power ground | Exposed pad (Pin 13) is primary thermal path-must be fully soldered to inner-layer GND plane |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® operation | Reduces IQ to 3.5µA at light loads while maintaining regulation-critical for always-on sensor nodes |
| 100% duty cycle dropout | Supports VIN down to 3.3V with full 2A output-enables operation during battery brownout |
| Internal compensation | Eliminates external compensation network-reduces BOM count and design iteration time |
| Integrated soft-start | 1ms internal ramp prevents inrush current-protects input capacitors and upstream supplies |
| Overtemperature protection | Thermal shutdown at 150°C junction-prevents damage during sustained overload or poor heatsinking |
Applications
| Battery-Powered Portable Instrumentation | Emergency Radios |
|---|---|
Use Scenario: Handheld multimeter with LCD, microcontroller, and analog front-end operating from two AA cells (1.8V–3.2V). IC Role / Device Role / Timing Role: Primary 3.3V system rail regulator delivering up to 2A peak during ADC sampling and display refresh. Use Value: Burst Mode® extends battery life beyond 500 hours; 100% duty cycle maintains VOUT as cells discharge below 3.3V. | Use Scenario: Compact emergency AM/FM/weather radio powered by alkaline or NiMH batteries, requiring instant-on functionality and low standby drain. IC Role / Device Role / Timing Role: Main 3.3V supply for RF receiver IC, audio amplifier, and microcontroller sleep/wake circuitry. Use Value: 3.5µA shutdown IQ enables >2-year shelf life; PGOOD signal validates rail stability before enabling sensitive RF stages. |
| Industrial Sensor Nodes | Low-Power IoT Edge Controllers |
Use Scenario: DIN-rail mounted temperature/humidity sensor node with LoRaWAN radio, operating unattended in factory environments. IC Role / Device Role / Timing Role: Regulator for 3.3V MCU core, sensor interface, and transceiver-exposed to –40°C to +85°C ambient. Use Value: –40°C to +125°C qualification ensures reliability; 1MHz switching avoids EMI-sensitive bands near ISM sub-GHz frequencies. | Use Scenario: Smart building controller aggregating BLE/Zigbee sensor data, running Linux RTOS on ARM Cortex-M7 with Ethernet PHY. IC Role / Device Role / Timing Role: Secondary 3.3V rail for PHY interface and memory subsystem, fed from primary 5V/12V bus. Use Value: Internal compensation and soft-start simplify layout; SYNC pin allows clock alignment with Ethernet MAC timing to reduce jitter coupling. |
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, 3.3V fixed, 1.8µA IQ, 2.25MHz, 1A max | Lower current rating and narrower VIN range; optimized for ultra-low-power wearables | Select when IQ <2µA is mandatory and load ≤1A; not suitable for 12V input or 2A peaks |
| MAX20004AATP+T | 3.5V–36V input, 3.3V fixed, 28µA IQ, 2.2MHz, 2A max, AEC-Q100 Grade | Automotive-qualified, higher IQ, wider VIN-designed for harsh environments | Select for automotive or industrial applications requiring extended temperature or fault diagnostics |
Compared with TPS62840DLCR and MAX20004AATP+T, the LTC3624IMSE-3.3#TRPBF uniquely balances 2A capability, 17V max input, 3.5µA IQ, and industrial temperature range-making it optimal for portable industrial equipment where both headroom and battery longevity are critical.
Availability
LTC3624IMSE-3.3#TRPBF 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.
Supply support for LTC3624IMSE-3.3#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 precision power management portfolio with rigorous industrial and automotive qualification standards.
The LTC3624 series is part of Linear's monolithic synchronous buck regulator product line, engineered for high-efficiency, low-quiescent-current DC/DC conversion in space-constrained portable and industrial systems.
FAQ
What is the maximum input voltage rating for the LTC3624IMSE-3.3#TRPBF?
The LTC3624IMSE-3.3#TRPBF has an absolute maximum input voltage rating of 17V. Operation above this level risks permanent damage. The device includes VIN overvoltage lockout that suspends switching when VIN exceeds 19V (typical) and resumes once VIN drops below 18.5V. For reliable long-term operation, keep steady-state VIN ≤17V and transient spikes within the 19V OVLO threshold. This makes the LTC3624IMSE-3.3#TRPBF suitable for 12V nominal systems with moderate surge margin.
Does the LTC3624IMSE-3.3#TRPBF require external feedback resistors?
No, the LTC3624IMSE-3.3#TRPBF is a fixed-output variant with internal feedback routing-its FB pin is internally connected to the 3.3V output, eliminating the need for external resistor dividers. This simplifies layout, reduces BOM cost, and improves accuracy by removing resistor tolerance and thermal drift errors. External compensation components are also unnecessary due to integrated compensation. The LTC3624IMSE-3.3#TRPBF delivers precisely 3.3V ±1% across temperature and load, as verified in the Electrical Characteristics table.
How does Burst Mode® operation affect output voltage ripple in the LTC3624IMSE-3.3#TRPBF?
In Burst Mode®, the LTC3624IMSE-3.3#TRPBF delivers energy in short, high-current bursts followed by sleep periods-reducing average input current and improving light-load efficiency-but increases low-frequency output ripple (typically 10–30mVPP). This is inherent to discontinuous conduction and acceptable for non-sensitive digital loads. For analog circuits requiring lower ripple, tie the MODE/SYNC pin to GND to enable pulse-skipping mode, which maintains higher switching frequency and reduces ripple to <5mVPP. The LTC3624IMSE-3.3#TRPBF supports both trade-offs without hardware change.
Can the LTC3624IMSE-3.3#TRPBF operate with input voltage equal to its 3.3V output?
Yes, the LTC3624IMSE-3.3#TRPBF supports 100% duty cycle operation, allowing VIN = VOUT = 3.3V while sustaining full 2A output current. This low-dropout capability is enabled by its PMOS high-side switch and internal circuitry that maintains peak current limit accuracy even at high duty cycles. During dropout, efficiency remains high (>90%) because conduction losses dominate over switching losses. This feature is essential for battery-powered systems where input voltage decays below the regulated output during discharge.
What thermal considerations apply to the LTC3624IMSE-3.3#TRPBF in a 12-lead MSOP package?
The LTC3624IMSE-3.3#TRPBF in the 12-lead MSOP package has θJA = 40°C/W and θJC = 10°C/W, but these values assume proper PCB layout: the exposed pad (Pin 13) must be fully soldered to a minimum 250mm² internal GND plane with ≥4 thermal vias. Without this, junction temperature can exceed 125°C at 1.5A load, triggering thermal shutdown. Derate output current by ~15% when ambient exceeds 70°C or copper area is reduced. The LTC3624IMSE-3.3#TRPBF includes overtemperature protection that disables switching above 150°C junction to prevent damage.
LTC3624IMSE-3.3#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):
- 3.3V
- 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-3.3#TRPBF FAQ
1.How can I place an order for LTC3624IMSE-3.3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3624IMSE-3.3#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-3.3#TRPBF reliable?
The price and inventory of LTC3624IMSE-3.3#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-3.3#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3624IMSE-3.3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3624IMSE-3.3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3624IMSE-3.3#TRPBF?
LTC3624IMSE-3.3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3624IMSE-3.3#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-3.3#TRPBF?
For technical support, including LTC3624IMSE-3.3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3624IMSE-3.3#TRPBF requirements.
6.How does Aetrix verify that LTC3624IMSE-3.3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3624IMSE-3.3#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-3.3#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3624IMSE-3.3#TRPBF?
All LTC3624IMSE-3.3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3624IMSE-3.3#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-3.3#TRPBF part is unused and in its original packaging.
Return procedure for LTC3624IMSE-3.3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3624IMSE-3.3#TRPBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
