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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Analog Devices Inc. LTC3624HMSE-5#TRPBF

Name: LTC3624HMSE-5#TRPBF
Brand: Analog Devices Inc.
SKU: LTC3624HMSE-5#TRPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LTC3624HMSE-5#TRPBF

Manufacturer:: Analog Devices Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 12-TSSOP (0.118", 3.00mm Width) Exposed Pad

Datasheet:: LTC3624HMSE-5#TRPBF.pdf

Description:: IC REG BUCK 5V 2A 12MSOP

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Product details

Overview

LTC3624HMSE-5#TRPBF from Analog Devices (formerly Linear Technology) is a 17V, 2A synchronous step-down regulator in a 12-lead MSOP package with exposed pad, delivering fixed 5V output at up to 2A, operating from 2.7V–17V input, featuring 2.25MHz switching frequency, ±1% output voltage accuracy, and 3.5µA quiescent current in Burst Mode - ideal for space-constrained portable instrumentation requiring high efficiency at light loads.

For engineers reviewing the LTC3624HMSE-5#TRPBF datasheet, LTC3624HMSE-5#TRPBF pinout, LTC3624HMSE-5#TRPBF application, or LTC3624HMSE-5#TRPBF equivalent, key selection criteria include its 2.25MHz operation enabling compact magnetics, H-grade 150°C junction rating for harsh environments, fixed 5V output with internal feedback, and MODE/SYNC pin support for external clock synchronization or ripple/efficiency trade-off control.

Technical Context

The LTC3624HMSE-5#TRPBF implements a constant-frequency peak current mode control architecture with internal compensation, supporting forced continuous, pulse-skipping, and Burst Mode® operation. Its 2.25MHz oscillator (±40% sync range) enables small external components, while integrated PMOS/NMOS power switches feature 200mΩ/115mΩ R_DS(ON) at V_IN = 5V.

It delivers regulated 5V output via internal feedback (no external divider required), includes overtemperature protection (trip at ~150°C), VIN overvoltage lockout (19V rising), and undervoltage lockout (2.7V rising). The PGOOD pin asserts after 32 cycles when V_OUT settles within ±7.5% of 5V.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 5.0V (±1% accuracy over temp/load - eliminates need for external resistor divider)
Switching Frequency	2.25MHz (±40% sync range - enables use of sub-2.2µH inductors and <10µF ceramic output caps)
Input Voltage Range	2.7V to 17V (supports single-cell Li-ion up to 4S battery stacks and industrial 12V rails)
Max Output Current	2A continuous (guaranteed across –40°C to +150°C junction temperature)
Quiescent Current	3.5µA in Burst Mode (enables >1-year battery life in always-on emergency radios at 10µA load)
Thermal Rating	H-grade: –40°C to +150°C T_J (exposed pad must be soldered - θ_JA = 40°C/W, θ_JC = 10°C/W)
Protection Features	Overtemperature shutdown, VIN OVP (19V), UVLO (2.7V), PGOOD with 32-cycle blanking delay

Pinout & Package

12-lead plastic MSOP package with exposed thermal pad (Pin 13), footprint compatible with industry-standard MSOP-12 but requiring GND-connected exposed pad for thermal and electrical performance.

Pin/Terminal	Circuit Role	Design Meaning
SW (Pin 1, 2)	Switch node	Connects to inductor - carries high di/dt square wave; requires low-inductance layout and Kelvin connection to minimize noise
VIN (Pin 3, 4)	Main input supply	Accepts 2.7V–17V; bypass with ≥10µF ceramic capacitor placed adjacent to pins
RUN (Pin 5)	Enable control	Active-high logic input (1.0V threshold); tie to VIN or microcontroller GPIO; must not float
PGOOD (Pin 6)	Power-good indicator	Open-drain output pulled low if V_OUT deviates >±7.5% from 5V; 32-cycle blanking prevents false triggers during transients
FB (Pin 8)	Feedback reference	Internally tied to 5V output - no external divider needed; short to V_OUT for fixed 5V operation
INTVCC (Pin 9)	Bias LDO output	3.6V regulated supply for internal circuitry; bypass with ≥2.2µF ceramic to GND
MODE/SYNC (Pin 10)	Operating mode control	Tie to INTVCC for Burst Mode (3.5µA IQ); ground for pulse-skipping (low ripple); 1V–2.4V for forced continuous; external clock input for sync
GND (Pins 11, 12, Exposed Pad 13)	Signal & power ground	All GND pins and exposed pad must connect to solid PCB ground plane - critical for thermal dissipation and EMI control

Key Features

Feature	Design Value
2.25MHz fixed-frequency operation	Enables use of 1.5µH inductors and 4.7µF–10µF X5R/X7R ceramic output capacitors - reduces board area by >40% vs 1MHz designs
3.5µA Burst Mode quiescent current	Extends battery runtime in standby: e.g., 10µA system load draws only 3.5µA from source - critical for emergency radios and IoT sensors
H-grade 150°C junction rating	Validated for continuous operation up to 150°C T_J - supports under-hood automotive modules and industrial enclosures without derating
Internal 5V feedback reference	Eliminates external resistor divider, reducing BOM count, layout area, and potential drift errors - improves long-term output stability
Synchronizable ±40% frequency range	Allows alignment with system clock or adjacent converters to avoid beat frequencies and reduce EMI peaks in narrowband bands
100% duty cycle dropout capability	Maintains regulation down to V_IN = V_OUT (5V) with ultralow IQ - preserves functionality during brownout conditions in battery-powered systems

Applications

Battery-Powered Portable Instrumentation	Emergency Radios with Long Shelf Life
Use Scenario: Handheld multimeters, portable oscilloscopes, and field calibrators powered by 2–3 cell Li-ion batteries (8.4V–12.6V). IC Role / Device Role / Timing Role: Primary 5V system rail regulator, converting variable battery voltage to stable 5V for MCU, ADC, and display drivers. Use Value: 2.25MHz switching minimizes inductor size (<2mm height), while 3.5µA Burst Mode IQ extends shelf life beyond 5 years on primary lithium cells.	Use Scenario: Emergency AM/FM/NOAA radios stored for years without maintenance, activated only during outages. IC Role / Device Role / Timing Role: Always-on 5V bias supply for real-time clock, memory retention, and wake-up circuitry. Use Value: 3.5µA quiescent current ensures >10-year battery hold time on CR123A cells - validated across –40°C to +85°C ambient.
Industrial Control I/O Modules	Low-Profile Embedded Computing Boards
Use Scenario: DIN-rail mounted PLC I/O modules operating from 12V/24V DC rails in factory environments up to 70°C ambient. IC Role / Device Role / Timing Role: Local 5V supply for isolated digital I/O drivers, RS-485 transceivers, and microcontroller peripherals. Use Value: H-grade 150°C T_J rating allows full 2A output at 70°C ambient without derating - eliminates need for heatsinks or airflow.	Use Scenario: Fanless edge AI gateways using compact 3.5" SBC form factor with tight thermal envelope and limited PCB area. IC Role / Device Role / Timing Role: Point-of-load regulator for FPGA I/O banks or USB 3.0 PHY requiring clean, low-noise 5V. Use Value: 2.25MHz operation enables 1.8×1.0mm shielded inductors and 0805 ceramic caps - saves >12mm² board area per rail.

Battery-Powered Portable Instrumentation

Emergency Radios with Long Shelf Life

Use Scenario: Handheld multimeters, portable oscilloscopes, and field calibrators powered by 2–3 cell Li-ion batteries (8.4V–12.6V).

IC Role / Device Role / Timing Role: Primary 5V system rail regulator, converting variable battery voltage to stable 5V for MCU, ADC, and display drivers.

Use Value: 2.25MHz switching minimizes inductor size (<2mm height), while 3.5µA Burst Mode IQ extends shelf life beyond 5 years on primary lithium cells.

Use Scenario: Emergency AM/FM/NOAA radios stored for years without maintenance, activated only during outages.

IC Role / Device Role / Timing Role: Always-on 5V bias supply for real-time clock, memory retention, and wake-up circuitry.

Use Value: 3.5µA quiescent current ensures >10-year battery hold time on CR123A cells - validated across –40°C to +85°C ambient.

Industrial Control I/O Modules

Low-Profile Embedded Computing Boards

Use Scenario: DIN-rail mounted PLC I/O modules operating from 12V/24V DC rails in factory environments up to 70°C ambient.

IC Role / Device Role / Timing Role: Local 5V supply for isolated digital I/O drivers, RS-485 transceivers, and microcontroller peripherals.

Use Value: H-grade 150°C T_J rating allows full 2A output at 70°C ambient without derating - eliminates need for heatsinks or airflow.

Use Scenario: Fanless edge AI gateways using compact 3.5" SBC form factor with tight thermal envelope and limited PCB area.

IC Role / Device Role / Timing Role: Point-of-load regulator for FPGA I/O banks or USB 3.0 PHY requiring clean, low-noise 5V.

Use Value: 2.25MHz operation enables 1.8×1.0mm shielded inductors and 0805 ceramic caps - saves >12mm² board area per rail.

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-down regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS54227PWPR	2.2MHz, 2A, 3.5V–18V input, adjustable V_OUT, 12µA IQ in Eco-mode, MSOP-10 package	Requires external feedback divider; higher IQ limits battery life; no 150°C rating	Select when adjustable output and TI ecosystem support are prioritized over ultra-low IQ and extended temperature range
MP2315GJ-Z	2.2MHz, 2A, 4.5V–28V input, fixed 5V option, 22µA IQ, 8-pin SOIC-EP package	Wider VIN range but higher minimum input (4.5V); larger SOIC footprint; lower thermal performance (θ_JA ≈ 60°C/W)	Select for cost-sensitive industrial supplies where 4.5V+ input is guaranteed and board space is less constrained

Compared with TPS54227PWPR and MP2315GJ-Z, the LTC3624HMSE-5#TRPBF provides superior light-load efficiency (3.5µA vs ≥12µA), guaranteed 150°C operation, and fixed 5V internal feedback - making it optimal for battery longevity and high-reliability embedded systems where layout area and thermal headroom are limited.

Availability

LTC3624HMSE-5#TRPBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, emergency communication devices, and industrial I/O modules requiring stable component supply, long-term lifecycle support, and guaranteed high-temperature operation.

Supply support for LTC3624HMSE-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 precision analog and power management portfolio with rigorous qualification standards and long-term product commitments.

The LTC3624 family is designed for high-efficiency, low-quiescent-current DC/DC conversion in space- and power-constrained applications - emphasizing ultralow IQ, wide input range, and robust thermal performance across automotive, industrial, and portable markets.

FAQ

What is the guaranteed operating junction temperature range for the LTC3624HMSE-5#TRPBF?

The LTC3624HMSE-5#TRPBF is an H-grade device with a guaranteed operating junction temperature range of –40°C to +150°C. This rating is production-tested and assured across the full range, unlike E- or I-grade variants limited to 125°C. Thermal design must ensure the exposed pad (Pin 13) is soldered to a sufficient copper area to maintain θ_JA ≤ 40°C/W under worst-case load and ambient conditions. The LTC3624HMSE-5#TRPBF achieves this rating without derating up to its full 2A output current.

Does the LTC3624HMSE-5#TRPBF require external feedback resistors to set the 5V output?

No, the LTC3624HMSE-5#TRPBF does not require external feedback resistors. It is a fixed 5V output variant with internal feedback circuitry connecting the FB pin directly to the regulated output. The FB pin (Pin 8) must be left unconnected or tied directly to V_OUT per the datasheet - no resistor divider is needed, reducing BOM count, layout area, and potential drift-related inaccuracies. This distinguishes the LTC3624HMSE-5#TRPBF from adjustable versions like the LTC3624HMSE-2#TRPBF.

How does the MODE/SYNC pin function on the LTC3624HMSE-5#TRPBF?

The MODE/SYNC pin (Pin 10) on the LTC3624HMSE-5#TRPBF controls operating mode and enables external clock synchronization. Tying it to INTVCC selects Burst Mode® (3.5µA IQ), grounding it enables pulse-skipping (lowest ripple), and applying 1.0V–2.4V sets forced continuous mode. It also accepts external clocks within ±40% of 2.25MHz (1.35MHz–3.15MHz) to synchronize switching. The LTC3624HMSE-5#TRPBF enters sync mode within 2–3 external clock cycles and reverts to internal oscillation within ~2µs if the clock stops.

What is the minimum input voltage required for the LTC3624HMSE-5#TRPBF to regulate 5V output?

The LTC3624HMSE-5#TRPBF requires a minimum input voltage of 2.7V to initiate regulation, but to sustain 5V output, V_IN must exceed 5V under normal switching operation. However, it supports 100% duty cycle dropout operation: when V_IN drops to 5V or slightly below, the top PMOS switch remains fully on, maintaining regulation with ultralow IQ. Below 2.7V, the undervoltage lockout (UVLO) disables the part. The LTC3624HMSE-5#TRPBF thus regulates 5V down to V_IN = 5V, unlike buck regulators requiring V_IN > V_OUT + dropout margin.

Is the exposed thermal pad on the LTC3624HMSE-5#TRPBF electrically connected, and how must it be handled?

Yes, the exposed thermal pad (Pin 13) on the LTC3624HMSE-5#TRPBF is electrically connected to GND and is mandatory for both thermal performance and electrical integrity. It must be soldered to a dedicated PCB GND plane with ≥4 thermal vias (0.3mm diameter) connecting to inner or bottom-layer GND planes. Failure to solder the pad results in degraded thermal resistance (θ_JA increases from 40°C/W to >70°C/W), potential overtemperature shutdown, and compromised EMI performance. The LTC3624HMSE-5#TRPBF datasheet explicitly states "EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB FOR OPTIMAL THERMAL PERFORMANCE".

LTC3624HMSE-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 ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 12-MSOP-EP

LTC3624HMSE-5#TRPBF FAQ

1.How can I place an order for LTC3624HMSE-5#TRPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for LTC3624HMSE-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 LTC3624HMSE-5#TRPBF reliable?

The price and inventory of LTC3624HMSE-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 LTC3624HMSE-5#TRPBF is usually 5 days.

3.What payment methods are accepted for LTC3624HMSE-5#TRPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3624HMSE-5#TRPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LTC3624HMSE-5#TRPBF?

LTC3624HMSE-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LTC3624HMSE-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 LTC3624HMSE-5#TRPBF?

For technical support, including LTC3624HMSE-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3624HMSE-5#TRPBF requirements.

6.How does Aetrix verify that LTC3624HMSE-5#TRPBF is sourced from the original manufacturer or authorized distributors?

All LTC3624HMSE-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 LTC3624HMSE-5#TRPBF meets industry standards.

7.What is the process for return or replacement of LTC3624HMSE-5#TRPBF?

All LTC3624HMSE-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3624HMSE-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 LTC3624HMSE-5#TRPBF part is unused and in its original packaging.

Return procedure for LTC3624HMSE-5#TRPBF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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