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MP1528DK-LF-Z LED Driver IC Equivalent & Substitute Parts
Part Overview
The MP1528DK-LF-Z is an active LED Driver IC manufactured by Monolithic Power Systems Inc., designed as a DC DC Regulator with Step-Up (Boost) topology. This component delivers 950mA switch current output for backlight applications, operating across a 2.7V to 36V supply range with analog and PWM dimming capabilities. The part is housed in an 8-MSOP package and maintains ROHS3 compliance with unlimited moisture sensitivity rating.
Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges, particularly for applications requiring similar boost regulation, dimming control, and thermal operating conditions.
Substiute Parts
Key Parameters
| Parameter | MP1528DK-LF-Z |
|---|---|
| Manufacturer | Monolithic Power Systems Inc. |
| Type | DC DC Regulator |
| Topology | Step-Up (Boost) |
| Number of Outputs | 1 |
| Voltage Supply (Min) | 2.7V |
| Voltage Supply (Max) | 36V |
| Voltage Output | 36V |
| Current Output / Channel | 950mA (Switch) |
| Dimming | Analog, PWM |
| Applications | Backlight |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
| Product Status | Active |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the MP1528DK-LF-Z is determined by the following critical parameters:
- Topology: Step-Up (Boost) regulation required
- Internal Switch: Must be present
- Number of Outputs: Single output configuration
- Supply Voltage Range: Minimum 2.7V input capability
- Output Voltage: 36V or higher output capability
- Current Capacity: Switch current rating of 950mA or greater
- Dimming Control: Analog and/or PWM dimming support
- Package Compatibility: Surface mount packages with similar thermal and electrical characteristics
- Operating Temperature: -40°C to 85°C minimum range
- Compliance: ROHS3 compliance required
Substitute parts are grouped based on topology alignment (Step-Up Boost), output current capability, supply voltage compatibility, and dimming method support. Parts with identical or superior electrical specifications within these parameters are considered functionally equivalent.
Parameter Comparison
| Parameter | MP1528DK-LF-Z | MAX1554ETA+T | LM3530TME-40/NOPB | TPS61161ADRVT | LT3491ESC8#TRMPBF | ADP1650ACBZ-R7 |
|---|---|---|---|---|---|---|
| Manufacturer | MPS | Analog Devices/Maxim | Texas Instruments | Texas Instruments | Analog Devices | Analog Devices |
| Type | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator |
| Topology | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) |
| Internal Switch | Yes | Yes | Yes | Yes | Yes | Yes |
| Number of Outputs | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage Supply (Min) | 2.7V | 3.15V | 2.7V | 2.7V | 2.5V | 2.7V |
| Voltage Supply (Max) | 36V | 5.5V | 5.5V | 5.5V | 12V | 5V |
| Voltage Output | 36V | 40V | 40V | 40V | — | 4.575V ~ 5.425V |
| Current Output / Channel | 950mA (Switch) | 970mA (Switch) | 30mA | 1.5A (Switch) | 350mA (Switch) | 1.5A (Flash) |
| Dimming | Analog, PWM | Analog, PWM | PWM | PWM | PWM | I2C |
| Applications | Backlight | Backlight | Backlight | Backlight | Backlight | Camera Flash |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Package / Case | 8-TSSOP, 8-MSOP | 8-WDFN Exposed Pad | 12-WFBGA, DSBGA | 8-TSSOP, 8-MSOP | 8-VFSOP | 12-WFBGA, WLCSP |
| Product Status | Active | Active | Active | Active | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
MAX1554ETA+T provides the closest electrical equivalence to MP1528DK-LF-Z with 970mA switch current output, matching analog and PWM dimming capabilities, and identical operating temperature range. Both parts maintain active product status and ROHS3 compliance. Package differences (8-TDFN vs 8-MSOP) require PCB layout verification but do not affect electrical functionality.
LM3530TME-40/NOPB operates within compatible supply voltage and temperature ranges with PWM dimming support for backlight applications. The 30mA output current represents a significant reduction from the MP1528DK-LF-Z specification and is suitable only for lower-power backlight implementations.
TPS61161ADRVT exceeds the current capacity requirement at 1.5A switch current and maintains compatible supply voltage, output voltage, and temperature specifications. PWM dimming aligns with primary dimming method. Package compatibility requires verification.
LT3491ESC8#TRMPBF delivers 350mA switch current with PWM dimming across compatible supply and temperature ranges. Output voltage specification is not provided in available data. This part is suitable for moderate-power backlight applications.
ADP1650ACBZ-R7 is designed for camera flash applications with I2C dimming control rather than analog/PWM dimming. Supply voltage maximum of 5V and output voltage range of 4.575V to 5.425V represent significant deviations from MP1528DK-LF-Z specifications. This part is not recommended as a direct substitute.
IS31BL3508B-STLS2-TR provides 1.2A switch current with analog and PWM dimming support across 2.7V to 5.5V supply range. Operating temperature and backlight application alignment support substitution for designs not requiring the full 36V supply range of the original part.
LT1937ESC6#TRMPBF delivers 320mA switch current with analog and PWM dimming across 2.5V to 10V supply range. SC-70-6 package represents a significant size reduction from 8-MSOP, suitable for space-constrained applications.
LM3402MM/NOPB and LM3414MRX/NOPB employ Step-Down (Buck) topology rather than Step-Up (Boost), making them unsuitable for applications requiring voltage boost regulation.
BD60910GU-E2 is marked as "Not For New Designs" and carries MSL-6 moisture sensitivity rating, limiting its suitability for new product development despite active backlight application support.
LM3501TL-16/NOPB operates with 400mA switch current and 16V output voltage across 2.7V to 7V supply range, suitable for lower-voltage backlight implementations.
Frequently Asked Questions (FAQ)
Q: Can MAX1554ETA+T directly replace MP1528DK-LF-Z in existing designs?
A: MAX1554ETA+T provides equivalent electrical performance with 970mA switch current and matching dimming capabilities. Package differences (8-TDFN vs 8-MSOP) require PCB layout modification. Both parts maintain identical operating temperature range and ROHS3 compliance.
Q: What is the primary limitation of ADP1650ACBZ-R7 as a substitute?
A: ADP1650ACBZ-R7 is designed for camera flash applications with I2C dimming control. Supply voltage maximum of 5V and output voltage range of 4.575V to 5.425V do not align with MP1528DK-LF-Z specifications requiring 36V output capability and 2.7V to 36V supply range.
Q: Are Step-Down (Buck) topology parts compatible with MP1528DK-LF-Z applications?
A: No. LM3402MM/NOPB and LM3414MRX/NOPB employ Step-Down (Buck) topology for voltage reduction, while MP1528DK-LF-Z requires Step-Up (Boost) topology for voltage elevation. These parts are not functionally equivalent.
Q: Why is BD60910GU-E2 not recommended despite backlight application support?
A: BD60910GU-E2 carries "Not For New Designs" product status and MSL-6 moisture sensitivity rating. These factors limit suitability for new product development. Additionally, 25.6mA output current is significantly below MP1528DK-LF-Z specifications.
Q: What package considerations apply when selecting substitute parts?
A: MP1528DK-LF-Z uses 8-MSOP (0.118", 3.00mm Width) package. Substitute parts employ various packages including 8-TDFN, 12-DSBGA, SOT-23-6, and SC-70-6. Package selection affects PCB layout, thermal management, and board space requirements. Electrical functionality remains independent of package type when electrical specifications align.
Q: Can LT1937ESC6#TRMPBF be used in space-constrained applications?
A: Yes. LT1937ESC6#TRMPBF delivers 320mA switch current with analog and PWM dimming in SC-70-6 package, representing significant size reduction from 8-MSOP. This configuration is suitable for applications where board space is limited and 320mA current capacity is sufficient.
Q: What dimming control differences exist between substitute options?
A: MP1528DK-LF-Z supports Analog and PWM dimming. MAX1554ETA+T and LT1937ESC6#TRMPBF provide identical dimming methods. LM3530TME-40/NOPB, TPS61161ADRVT, and LT3491ESC8#TRMPBF support PWM dimming only. ADP1650ACBZ-R7 uses I2C dimming control. Application requirements determine dimming method compatibility.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts maintain ROHS3 compliance matching MP1528DK-LF-Z specifications. MSL ratings are uniformly 1 (Unlimited) across all recommended substitutes except BD60910GU-E2, which carries MSL-6 rating.
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