LM2753SDX

Overview

The LM2753SDX is a high-power switched-capacitor voltage converter and LED driver manufactured by Texas Instruments. It features a boost topology with an internal switch, designed for driving flash LEDs with a pulsed current of 400 mA at an input voltage of 3.6 V. The device operates within a supply voltage range of 3 V to 5.5 V, providing a regulated output voltage between 4.75 V and 5.25 V. It utilizes a 725 kHz switching frequency and supports PWM dimming control. The component is housed in a 10-WFDFN (WSON-10) package with an exposed pad, suitable for surface-mount installation across an operating temperature range of -40°C to +85°C.

Feature Summary

• High-power switched-capacitor voltage conversion capability for efficient LED driving
• Integrated internal switches eliminate the need for external inductors
• Supports precise PWM dimming for controlled light intensity regulation

Applications

• Camera flash LED drivers
• Portable electronic device illumination systems
• High-power LED lighting applications requiring compact form factors

Procurement Notes

Verify the specific suffix configuration when sourcing replacements, as ordering suffixes may indicate variations in packaging or tape-and-reel specifications rather than functional changes. Confirm that the target application environment remains within the specified -40°C to +85°C operating temperature range to ensure reliable performance. Cross-reference the 10-WFDFN footprint dimensions against the PCB layout to guarantee proper thermal dissipation through the exposed pad. Ensure compatibility with the required 3 V to 5.5 V input supply constraints during system design validation.

Selection Notes

Select this component for applications requiring a compact, inductor-less solution for driving high-current LEDs from low-voltage sources. The switched-capacitor topology offers efficiency advantages over linear regulators in step-up configurations. Consider the 400 mA pulsed current capability and 725 kHz frequency when evaluating electromagnetic interference requirements. The WSON-10 package provides a small footprint ideal for space-constrained portable designs. Verify that the PWM dimming interface aligns with the host controller's signaling capabilities.

Part Context

The LM2753 belongs to Texas Instruments' family of high-power switched-capacitor voltage converters. It is specifically engineered for LED driver applications, distinguishing itself from general-purpose DC-DC regulators by its optimized output characteristics for flash lighting. The SDX variant denotes the tape-and-reel packaging format, facilitating automated assembly processes. This part complements other devices in the series by offering a balance of power density and simplicity in charge-pump based LED management solutions.

Replacement Considerations

LM2753SD/NOPB

FAQ

What is the maximum pulsed current the LM2753 can drive?

The LM2753 is capable of driving a flash LED with a pulsed current of 400 mA.

Does the LM2753 require external inductors?

No, the LM2753 uses a switched-capacitor doubler topology with internal switches, eliminating the need for external inductors.