LM3554TMX/NOPB Equivalent & Substitute Parts

Part Overview

The LM3554TMX/NOPB is an active LED driver IC manufactured by Texas Instruments, designed for camera flash applications. It integrates a 2-output DC-DC step-up (boost) regulator with I2C-based dimming control, delivering 600mA flash current from a 2.5V to 5.5V supply. The device is housed in a 16-DSBGA package and maintains active product status with full ROHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges for this power management category.

Substiute Parts

LM3554TMX/NOPB

Texas InstrumentsIn Stock: 29366LM3554TMX/NOPB Datasheet

Current PartRFQ

LM3554TME/NOPB

Texas InstrumentsIn Stock: 6183LM3554TME/NOPB Datasheet

Parametric EquivalentRFQ

A8518KLPTR-T

Allegro MicroSystemsIn Stock: 18832A8518KLPTR-T Datasheet

MFR RecommendedRFQ

LV52207XA-VH

onsemiIn Stock: 7974LV52207XA-VH Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM3554TMX/NOPB is determined by the following critical parameters: DC-DC regulator topology (step-up boost), dual output configuration, input voltage range compatibility (2.5V–5.5V minimum), output current capability (600mA flash minimum), dimming control method, and surface-mount package type. Parts are grouped into two categories:

Parametric Equivalent: Parts maintaining identical electrical specifications and package form factor, allowing direct replacement without circuit modification.

Manufacturer Recommended Alternatives: Parts with different electrical characteristics (supply voltage range, output current, dimming method, or package type) that require circuit evaluation and may necessitate design changes.

Parameter Comparison

Engineering Selection Recommendations

LM3554TME/NOPB is a parametric equivalent to the LM3554TMX/NOPB. Both parts share identical electrical specifications, dimming control method (I2C), package type (16-DSBGA), and operating temperature range. This part provides direct substitution capability with no circuit modifications required. Both maintain active product status and ROHS3 compliance.

A8518KLPTR-T (Allegro MicroSystems) differs in multiple critical parameters: minimum supply voltage (4.5V vs. 2.5V), maximum output voltage (40V vs. 5V), output current per channel (200mA vs. 600mA), dimming method (Analog/PWM vs. I2C), and package type (16-eTSSOP-EP vs. 16-DSBGA). This part is suitable only for applications with higher supply voltage requirements and lower current demands. Circuit redesign is required for integration.

LV52207XA-VH (onsemi) is a low-current alternative with significant parameter differences: minimum supply voltage (2.7V), maximum output voltage (40V), output current per channel (20mA), dimming method (PWM only), and package type (9-WLCSP). This part is applicable only to low-power backlight applications and requires substantial circuit modification.

Frequently Asked Questions (FAQ)

Q: Can LM3554TME/NOPB replace LM3554TMX/NOPB without any design changes?

A: Yes. The LM3554TME/NOPB is a parametric equivalent with identical electrical specifications, I2C dimming control, dual 600mA outputs, and 16-DSBGA package. Direct substitution is possible without circuit modification.

Q: Why is A8518KLPTR-T listed as a substitute if it has different output current and voltage specifications?

A: A8518KLPTR-T is listed as a manufacturer-recommended alternative for applications where the higher supply voltage range (4.5V–40V) and lower output current (200mA) are acceptable. It is not a direct replacement but an option for different application requirements. Circuit evaluation is necessary.

Q: What is the primary difference between the dimming control methods?

A: The LM3554TMX/NOPB uses I2C digital dimming control, enabling precise brightness adjustment via serial communication. The A8518KLPTR-T and LV52207XA-VH use analog and PWM dimming methods, requiring different control circuitry and firmware implementation.

Q: Is LV52207XA-VH suitable for camera flash applications?

A: No. The LV52207XA-VH is designed for backlight applications with a maximum output current of 20mA per channel, significantly lower than the 600mA required for camera flash. The LM3554TMX/NOPB and LM3554TME/NOPB are the appropriate choices for flash applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed parts—LM3554TMX/NOPB, LM3554TME/NOPB, A8518KLPTR-T, and LV52207XA-VH—maintain ROHS3 compliance and REACH unaffected status.

Q: What package considerations apply when selecting a substitute?

A: The LM3554TMX/NOPB and LM3554TME/NOPB use 16-DSBGA packages with identical footprints. The A8518KLPTR-T uses 16-eTSSOP-EP, and the LV52207XA-VH uses 9-WLCSP, both requiring different PCB layouts and assembly processes. Package selection depends on available board space and manufacturing capabilities.