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LM2753SDX LED Driver IC Equivalent & Substitute Parts
Part Overview
The LM2753SDX is a LED Driver IC from Texas Instruments designed for camera flash applications. It functions as a 1-output DC DC regulator using switched capacitor (charge pump) topology with PWM dimming capability, rated for 400mA flash current output. The main part is classified as obsolete product status, which necessitates identification of active equivalent and substitute components for new designs and production continuity.
Substiute Parts
Key Parameters
| Parameter | LM2753SDX |
|---|---|
| Manufacturer | Texas Instruments |
| Category | Power Management (PMIC) |
| Type | DC DC Regulator |
| Topology | Switched Capacitor (Charge Pump) |
| Number of Outputs | 1 |
| Voltage Supply Range | 3V to 5.5V |
| Voltage Output | 4.75V to 5.25V |
| Current Output / Channel | 400mA (Flash) |
| Frequency | 725kHz |
| Dimming | PWM |
| Applications | Camera Flash |
| Operating Temperature | -40°C to 85°C (TA) |
| Package / Case | 10-WFDFN Exposed Pad |
| Supplier Device Package | 10-SON (3x3) |
| Product Status | Obsolete |
| RoHS Status | RoHS non-compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the LM2753SDX is determined by the following critical parameters:
Primary Substitution Criteria:
- Topology: Switched Capacitor (Charge Pump) for direct equivalents
- Number of Outputs: 1 output configuration
- Voltage Supply Range: 3V to 5.5V input compatibility
- Voltage Output: 4.75V to 5.25V output range
- Current Output: 400mA flash current capability
- Dimming Method: PWM dimming support
- Package: 10-SON (3x3) form factor
- Operating Temperature: -40°C to 85°C minimum range
Parametric Equivalents (LM2753SD/NOPB, LM2753SDX/NOPB) maintain identical electrical specifications and package configuration, with the primary difference being product status (active vs. obsolete) and RoHS compliance level.
Manufacturer Recommended Alternatives (ISL78100ARZ-T, LT3474IFE#PBF, LT3477IFE#PBF, LT3593ES6#TRMPBF, MAX31840ATA+T, MP2410GJ-P, MP24833-AGN) provide functional LED driver capability with variations in topology, current rating, voltage range, package type, and operating temperature range. These alternatives are suitable when the specific charge pump topology is not required and design flexibility permits topology variation.
Parameter Comparison
| Parameter | LM2753SDX | LM2753SD/NOPB | LM2753SDX/NOPB | ISL78100ARZ-T | LT3474IFE#PBF | LT3477IFE#PBF | LT3593ES6#TRMPBF | MAX31840ATA+T | MP2410GJ-P | MP24833-AGN |
|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | Renesas Electronics | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc./Maxim | Monolithic Power Systems | Monolithic Power Systems |
| Type | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator |
| Topology | Switched Capacitor (Charge Pump) | Switched Capacitor (Charge Pump) | Switched Capacitor (Charge Pump) | Step-Down (Buck), Step-Up (Boost) | Step-Down (Buck) | Flyback, SEPIC, Step-Down (Buck), Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Down (Buck) | Step-Down (Buck), Step-Up (Boost) |
| Number of Outputs | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage Supply (Min) | 3V | 3V | 3V | 2.7V | 4.6V | 2.5V | 2.7V | 6.5V | 4.2V | 4.5V |
| Voltage Supply (Max) | 5.5V | 5.5V | 5.5V | 16V | 36V | 25V | 5.5V | 26V | 24V | 55V |
| Voltage Output | 4.75V to 5.25V | 4.75V to 5.25V | 4.75V to 5.25V | 32V | Not specified | Not specified | Not specified | Not specified | Not specified | Not specified |
| Current Output / Channel | 400mA (Flash) | 400mA (Flash) | 400mA (Flash) | 1A | 1A | 3A (Switch) | 45mA | 1A | 2A | 3A |
| Frequency | 725kHz | 725kHz | 725kHz | 1MHz | 200kHz to 2MHz | 200kHz to 4.6MHz | 1MHz | 770kHz | 1MHz | 210kHz |
| Dimming | PWM | PWM | PWM | Analog, PWM | PWM | PWM | Not specified | Yes | Analog | Analog, PWM |
| Applications | Camera Flash | Camera Flash | Camera Flash | Backlight | Backlight | Not specified | Backlight | Lighting | Backlight | Backlight, Lighting |
| Operating Temperature | -40°C to 85°C (TA) | -40°C to 85°C (TA) | -40°C to 85°C (TA) | -40°C to 105°C (TA) | -40°C to 125°C (TA) | -40°C to 125°C (TA) | -40°C to 85°C (TJ) | -40°C to 125°C (TJ) | -40°C to 125°C (TJ) | -40°C to 125°C (TJ) |
| Package / Case | 10-WFDFN Exposed Pad | 10-WFDFN Exposed Pad | 10-WFDFN Exposed Pad | 20-VFQFN Exposed Pad | 16-TSSOP Exposed Pad | 20-TSSOP Exposed Pad | SOT-23-6 Thin, TSOT-23-6 | 8-WDFN Exposed Pad | SOT-23-6 Thin, TSOT-23-6 | 8-SOIC Exposed Pad |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active | Active | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| MSL | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 3 (168 Hours) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 2A (4 Weeks) |
Engineering Selection Recommendations
Direct Parametric Equivalents:
LM2753SD/NOPB and LM2753SDX/NOPB are direct parametric equivalents to the LM2753SDX. Both maintain identical electrical specifications, package configuration, and functional characteristics. The primary distinction is product status: both are active components, whereas the LM2753SDX is obsolete. Both equivalents are ROHS3 compliant, addressing regulatory requirements that the original part does not meet. Selection between these two equivalents depends on packaging preference (Tape & Reel) and inventory availability.
Manufacturer Recommended Alternatives:
When topology flexibility is acceptable, manufacturer recommended alternatives provide functional LED driver capability with extended operating temperature ranges and enhanced compliance certifications:
ISL78100ARZ-T offers automotive-grade qualification (AEC-Q100) with extended temperature range (-40°C to 105°C) and supports both buck and boost topologies. This part is suitable for automotive camera flash applications requiring higher temperature performance.
LT3474IFE#PBF and LT3477IFE#PBF from Analog Devices provide automotive-grade qualification with extended temperature ranges (-40°C to 125°C). LT3474IFE#PBF uses step-down (buck) topology with 1A output current, while LT3477IFE#PBF supports multiple topologies (Flyback, SEPIC, Buck, Boost) with 3A switch current, offering greater design flexibility.
LT3593ES6#TRMPBF is a compact step-up (boost) topology device in TSOT-23-6 package with 45mA output current, suitable for space-constrained applications with lower current requirements.
MAX31840ATA+T provides step-up (boost) topology with 1A output current and extended temperature range (-40°C to 125°C), suitable for lighting applications requiring higher input voltage tolerance (6.5V to 26V).
MP2410GJ-P offers step-down (buck) topology with 2A output current and analog dimming capability in compact TSOT-23-6 package, suitable for backlight applications with extended temperature range (-40°C to 125°C).
MP24833-AGN provides dual topology support (buck and boost) with 3A output current, automotive-grade qualification, and extended temperature range (-40°C to 125°C), offering maximum design flexibility for backlight and lighting applications.
Frequently Asked Questions (FAQ)
Q: Can LM2753SD/NOPB or LM2753SDX/NOPB be used as direct replacements for the obsolete LM2753SDX?
A: Yes. LM2753SD/NOPB and LM2753SDX/NOPB are parametric equivalents with identical electrical specifications, output current rating (400mA flash), voltage ranges (3V to 5.5V input, 4.75V to 5.25V output), topology (switched capacitor charge pump), and package configuration (10-SON 3x3). Both are active products with ROHS3 compliance. No design modifications are required for substitution.
Q: What is the primary difference between the parametric equivalents and manufacturer recommended alternatives?
A: Parametric equivalents maintain the switched capacitor (charge pump) topology and 400mA output current specification. Manufacturer recommended alternatives employ different topologies (buck, boost, buck-boost, flyback, SEPIC) with varying output current ratings (45mA to 3A), voltage ranges, and package types. Alternatives provide greater design flexibility but may require circuit redesign and validation.
Q: Are all substitute parts RoHS compliant?
A: All parametric equivalents and manufacturer recommended alternatives listed are ROHS3 compliant. The original LM2753SDX is RoHS non-compliant. Compliance status should be verified against specific regulatory requirements for your application.
Q: What package considerations apply when selecting alternatives?
A: The original LM2753SDX uses 10-SON (3x3) package. Parametric equivalents maintain this package. Manufacturer recommended alternatives use different packages: ISL78100ARZ-T (20-QFN 4x4), LT3474IFE#PBF (16-TSSOP), LT3477IFE#PBF (20-TSSOP), LT3593ES6#TRMPBF (TSOT-23-6), MAX31840ATA+T (8-TDFN 3x3), MP2410GJ-P (TSOT-23-6), MP24833-AGN (8-SOIC). Package selection impacts PCB layout, thermal management, and board space requirements.
Q: Which alternatives support PWM dimming like the original part?
A: Parametric equivalents (LM2753SD/NOPB, LM2753SDX/NOPB) maintain PWM dimming. Among manufacturer recommended alternatives, ISL78100ARZ-T, LT3474IFE#PBF, LT3477IFE#PBF, and MP24833-AGN support PWM dimming. LT3593ES6#TRMPBF does not specify dimming capability. MP2410GJ-P supports analog dimming only. MAX31840ATA+T supports dimming without specifying method.
Q: What is the operating temperature range consideration for alternative selection?
A: The original LM2753SDX operates from -40°C to 85°C. Parametric equivalents maintain this range. Manufacturer recommended alternatives extend to -40°C to 105°C (ISL78100ARZ-T) or -40°C to 125°C (LT3474IFE#PBF, LT3477IFE#PBF, MAX31840ATA+T, MP2410GJ-P, MP24833-AGN), except LT3593ES6#TRMPBF which matches the original range. Extended temperature range alternatives are suitable for high-temperature environments.
Q: Can alternatives with higher output current ratings be used in place of the 400mA specification?
A: Yes, alternatives with higher current ratings (1A, 2A, 3A) can be used in applications requiring 400mA output. The higher rating provides design margin and thermal headroom. However, circuit design must accommodate the alternative topology and package configuration. Lower current alternatives (45mA) are not suitable for 400mA applications.
Q: What moisture sensitivity level (MSL) considerations apply?
A: The original LM2753SDX and most alternatives have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. MP24833-AGN has MSL 2A (4 Weeks), requiring controlled storage and handling. ISL78100ARZ-T has MSL 3 (168 Hours), requiring more stringent moisture control during storage and assembly.
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