Manufacturer Part Number

LM2735XMFX/NOPB

Description

This is a switching regulator IC from Texas Instruments used for multiple configurations including boost, flyback, and SEPIC topologies. It supports adjustable positive output voltage and handles up to 2.1A switch current. Designed for compact solutions with SOT-23-5 (SC-74A, SOT-753) package. Suitable for step-up and step-up/step-down conversion tasks in various power management applications.

Specifications

Input Voltage Range: 2.7V to 5.5V

Output Voltage Adjustable: 3V to 24V

Maximum Output Current: 2.1A (Switch)

Switching Frequency: 1.6MHz

Output Type: Adjustable, positive

Number of Outputs: 1

Topology: Boost, Flyback, SEPIC

Synchronous Rectifier: No

Operating Temperature Range: -40°C to 125°C (TJ)

Mounting: Surface mount

Package: SOT-23-5

Moisture Sensitivity Level: 1 (unlimited)

RoHS Status: ROHS3 Compliant

REACH Status: Unaffected

ECCN: EAR99

HTSUS: 8542.39.0001

Device Structure

The device is a monolithic switching regulator featuring an internal power switch, logic circuitry, and control blocks for regulation and protection. Packaged in a tiny SOT-23-5 case (SC-74A, SOT-753), ideal for space-constrained designs where height and footprint matter. It contains external pins for feedback, enable, and switching node.

Performance Characteristics

Stable operation with fast switching at 1.6MHz. High efficiency across a broad range of input and output voltages. Can deliver up to 2.1A peak switch current. Supports adjustable outputs from 3V up to 24V, suitable for either battery-powered or line-powered designs. Wide operating temperature for robust reliability.

Application Environments

Used in portable equipment, consumer electronics, battery-powered devices, industrial automation, LCD/OLED bias supplies, communication systems, point-of-load regulation, and other situations where compact, high-efficiency, step-up or SEPIC voltage conversion is needed.

Selection Guidelines

Check input and output voltage requirements and make sure they fit within 2.7V–5.5V (input) and 3V–24V (output) ranges. Calculate load current and keep below 2.1A switch rating. Confirm that the SOT-23-5 package suits your PCB and that your operating temperatures match the device ratings. If synchronous rectification is required, note that this device is non-synchronous.

Usage Considerations

Adequate PCB layout and thermal management support are important to ensure stable operation. Follow recommended inductor and capacitor selection for optimal performance. Pay attention to input/output filtering to minimize noise and ensure stability. Protect against overcurrent and provide proper feedback component values for voltage accuracy. Handle and store in accordance with MSL 1 requirements.

Potential Equivalent/Replacement Models

Possible alternatives from Texas Instruments include:

LM2623

LM2622

TLV61046A

Other manufacturers’ alternatives may include:

Analog Devices LTC3122

ON Semiconductor NCP1402 (for lower currents)

Microchip MIC2288

Check datasheets and specifications closely for voltage, current, switching frequency, and package compatibility before substituting.

If no suitable alternative can be confirmed, please contact the Ariat-Tech sales team for expert recommendations and cross-reference support.

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