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AP5725WUG-7 Equivalent & Substitute Parts
Part Overview
The AP5725WUG-7 is an LED Driver IC manufactured by Diodes Incorporated, classified as a Power Management PMIC. This device functions as a 1-output DC-DC regulator with step-up (boost) topology, delivering PWM dimming control for backlight applications. The part operates with a 750mA internal switch, input voltage range of 2.7V to 5.5V, and output voltage of 26V at 1.2MHz switching frequency. The device is housed in a TSOT-23-6 surface mount package and maintains Active product status with ROHS3 compliance and unlimited moisture sensitivity rating.
Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges for LED driver applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | AP5725WUG-7 |
| Manufacturer | Diodes Incorporated |
| Category | Power Management (PMIC) |
| Type | DC DC Regulator |
| Topology | Step-Up (Boost) |
| Number of Outputs | 1 |
| Voltage - Supply (Min) | 2.7V |
| Voltage - Supply (Max) | 5.5V |
| Voltage - Output | 26V |
| Current - Output / Channel | 750mA (Switch) |
| Frequency | 1.2MHz |
| Dimming | PWM |
| Applications | Backlight |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | SOT-23-6 Thin, TSOT-23-6 |
| Product Status | Active |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the AP5725WUG-7 are selected based on the following critical parameters that define functional equivalence:
Primary Substitution Criteria:
- Topology: Step-Up (Boost) DC-DC regulator
- Dimming Control: PWM capability
- Application: Backlight LED driver
- Internal Switch: Present
- Number of Outputs: Single output
- Supply Voltage Range: Minimum 2.5V to 5.5V (overlapping with 2.7V-5.5V)
- Output Voltage: 26V or higher capability
- Current Handling: 500mA or greater switch current
- Switching Frequency: 1MHz or higher
- Operating Temperature: -40°C to 85°C minimum
- Package Type: Surface mount (various packages acceptable)
- Product Status: Active or equivalent lifecycle status
- Compliance: ROHS3 compliant
Substitutes are grouped into two categories based on current capacity and application alignment:
Group 1 - High Current Boost Regulators (500mA+): Parts with 500mA to 1.5A switch current, step-up topology, and backlight application focus. These maintain closest functional parity with the AP5725WUG-7.
Group 2 - Alternative Topology/Application Parts: Parts with different topologies (switched capacitor, buck-boost) or primary applications (camera flash) that may serve as functional alternatives under specific design constraints.
Parameter Comparison
| Parameter | AP5725WUG-7 | LT3591EDDB#TRPBF | MAX1561ETA+T | MIC2291-15YML-TR | TPS61041DRVT | TPS61050YZGR | TPS61052DRCT | LT3498EDDB#TRMPBF | LT3517IUF#PBF | MAX8901AETA+T | LM2753SD/NOPB |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Diodes Inc. | Analog Devices | Analog Devices/Maxim | Microchip | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices | Analog Devices | Analog Devices/Maxim | Texas Instruments |
| Topology | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Down/Step-Up | Step-Up (Boost) | Switched Capacitor |
| Voltage - Supply (Min) | 2.7V | 2.5V | 2.6V | 2.5V | 1.8V | 2.5V | 2.5V | 2.5V | 3V | 2.6V | 3V |
| Voltage - Supply (Max) | 5.5V | 12V | 5.5V | 10V | 6V | 6V | 6V | 12V | 30V | 5.5V | 5.5V |
| Voltage - Output | 26V | Not specified | 26V | 16V | 28V | 5.5V | 5.5V | 32V | Not specified | 26V | 4.75V - 5.25V |
| Current - Output / Channel | 750mA (Switch) | 500mA (Switch) | 950mA (Switch) | 1.2A (Switch) | 215mA (Switch) | 1.2A (Flash) | 1.2A (Flash) | 20mA | 1.5A (Switch) | 25mA | 400mA (Flash) |
| Frequency | 1.2MHz | 1MHz | 1MHz | 1.2MHz | 1MHz | 2MHz | 2MHz | 2.3MHz | 250kHz - 2.5MHz | 750kHz | 725kHz |
| Dimming | PWM | PWM | Analog, PWM | Analog, PWM | PWM | PWM | PWM | Analog, PWM | Analog, PWM | PWM | PWM |
| Applications | Backlight | Backlight | Backlight | Camera Flash | Backlight | Camera Flash | Camera Flash | Backlight | Backlight | Backlight | Camera Flash |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TJ) | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TJ) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Package / Case | SOT-23-6 Thin | 8-WFDFN Exposed Pad | 8-WDFN Exposed Pad | 8-VFDFN Exposed Pad | 6-WDFN Exposed Pad | 12-UFBGA, DSBGA | 10-VFDFN Exposed Pad | 12-WFDFN Exposed Pad | 16-WQFN Exposed Pad | 8-WFDFN Exposed Pad | 10-WFDFN Exposed Pad |
| Product Status | Active | Active | Active | Active | Active | Active | Last Time Buy | Active | Active | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | 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) | 2 (1 Year) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
Primary Substitutes (Highest Compatibility):
LT3591EDDB#TRPBF and MAX1561ETA+T represent the closest functional equivalents. Both maintain step-up boost topology, PWM dimming, backlight application focus, and 26V output capability. LT3591EDDB#TRPBF operates at 500mA switch current with 1MHz frequency and -40°C to 85°C temperature range, matching the thermal envelope of the AP5725WUG-7. MAX1561ETA+T provides 950mA switch current at 1MHz with identical temperature range and 26V output, offering higher current capacity within the same thermal specification. Both devices carry Active product status and ROHS3 compliance with unlimited MSL rating.
Secondary Substitutes (Functional Alternatives):
MIC2291-15YML-TR delivers 1.2A switch current at 1.2MHz with step-up topology and PWM/analog dimming capability. While specified for camera flash applications, the electrical parameters support backlight operation. Operating temperature extends to -40°C to 125°C, exceeding the AP5725WUG-7 specification. Output voltage is limited to 16V, which may constrain certain backlight designs requiring 26V.
TPS61041DRVT provides 215mA switch current at 1MHz with step-up topology and PWM dimming. Supply voltage range extends to 1.8V minimum, offering broader input compatibility. Output voltage reaches 28V, exceeding the AP5725WUG-7 specification. Current capacity is reduced compared to the main part, limiting application to lower-power backlight circuits.
LT3498EDDB#TRMPBF operates as a step-up boost regulator with 20mA output current, 2.3MHz frequency, and 32V output capability. This part serves low-current backlight applications and does not provide equivalent current handling for standard backlight loads.
LT3517IUF#PBF combines step-down and step-up topologies with 1.5A switch current and extended temperature range to -40°C to 125°C. Frequency range spans 250kHz to 2.5MHz with analog and PWM dimming. This dual-topology approach provides design flexibility but requires different application circuit topology compared to the AP5725WUG-7.
Limited Compatibility Substitutes:
TPS61050YZGR and TPS61052DRCT are specified for camera flash applications with 1.2A flash current and 2MHz frequency. Output voltage is limited to 5.5V, incompatible with 26V backlight requirements. TPS61052DRCT carries Last Time Buy status and MSL rating of 2 (1 Year), indicating end-of-life trajectory.
MAX8901AETA+T provides only 25mA output current, suitable only for indicator LED applications, not general backlight loads.
LM2753SD/NOPB employs switched capacitor (charge pump) topology with 400mA flash current and 4.75V to 5.25V output range, fundamentally incompatible with 26V boost regulator requirements.
Compliance and Lifecycle Considerations:
All recommended substitutes maintain ROHS3 compliance and Active product status except TPS61052DRCT, which carries Last Time Buy designation. MSL ratings are uniformly 1 (Unlimited) for primary substitutes, matching the AP5725WUG-7 specification. Extended temperature range variants (MIC2291-15YML-TR, LT3498EDDB#TRMPBF, LT3517IUF#PBF) provide thermal margin beyond the -40°C to 85°C requirement but do not constitute a substitution requirement for standard backlight applications.
Frequently Asked Questions (FAQ)
Q: Can the LT3591EDDB#TRPBF directly replace the AP5725WUG-7 in a backlight circuit?
A: LT3591EDDB#TRPBF is functionally compatible as a substitute. Both devices employ step-up boost topology with PWM dimming, 26V output capability, and identical -40°C to 85°C operating temperature range. The primary difference is switch current: LT3591EDDB#TRPBF provides 500mA versus AP5725WUG-7's 750mA. This substitution is valid for backlight designs operating at or below 500mA load current. Circuit topology and component values remain compatible between the two parts.
Q: Why is TPS61050YZGR listed as a substitute if it has only 5.5V output?
A: TPS61050YZGR is included in the substitute list provided in the input data for the AP5725WUG-7. However, the 5.5V output voltage is fundamentally incompatible with the 26V backlight requirement. This part is not recommended for direct substitution in applications requiring 26V output. TPS61050YZGR serves camera flash applications and should not be selected for backlight LED driver circuits.
Q: What is the significance of the MSL rating difference between AP5725WUG-7 and TPS61052DRCT?
A: AP5725WUG-7 carries MSL 1 (Unlimited), indicating no moisture sensitivity constraints during storage and handling. TPS61052DRCT carries MSL 2 (1 Year), requiring controlled humidity storage and limiting shelf life to one year from manufacturing. For applications with extended inventory holding periods or high-humidity environments, MSL 1 rated parts are preferred. Additionally, TPS61052DRCT is designated Last Time Buy, indicating discontinued production and limited future availability.
Q: Can MAX1561ETA+T be used instead of AP5725WUG-7 for higher current backlight applications?
A: MAX1561ETA+T provides 950mA switch current compared to AP5725WUG-7's 750mA, offering 27% higher current capacity. Both devices maintain step-up boost topology, 26V output, 1MHz switching frequency, and -40°C to 85°C operating temperature. MAX1561ETA+T includes analog dimming capability in addition to PWM, providing enhanced control flexibility. This substitution is valid for backlight designs requiring current capacity between 750mA and 950mA. Circuit design and component selection remain compatible.
Q: Why do some substitutes specify different temperature measurement points (TA vs. TJ)?
A: TA indicates ambient temperature measurement at the device package exterior, while TJ indicates junction temperature measurement at the silicon die. Both specifications define the same -40°C to 85°C operating range for the AP5725WUG-7 and most substitutes. The measurement point difference does not affect functional compatibility or thermal design requirements for standard backlight applications.
Q: Is MIC2291-15YML-TR suitable for backlight applications despite being specified for camera flash?
A: MIC2291-15YML-TR employs step-up boost topology with PWM and analog dimming control, matching the AP5725WUG-7 functional architecture. The camera flash application designation reflects the primary market focus, not a functional limitation. The 1.2A switch current, 1.2MHz frequency, and extended -40°C to 125°C temperature range support backlight operation. However, the 16V output voltage is lower than the 26V AP5725WUG-7 specification, limiting compatibility to backlight designs operating at 16V or lower.
Q: What package considerations apply when selecting a substitute?
A: The AP5725WUG-7 uses SOT-23-6 Thin package (6-pin). Substitutes employ various surface mount packages including 8-WFDFN, 8-TDFN, 10-VFDFN, 12-WFDFN, 16-WQFN, and 12-DSBGA. Package differences require PCB layout redesign, including trace routing, via placement, and thermal management modifications. Pin count and pinout assignments differ between packages, necessitating schematic and board layout updates. Thermal performance may vary due to package size and exposed pad design. Substitution with different packages requires full design validation and is not a direct drop-in replacement.
Q: Can LT3517IUF#PBF replace AP5725WUG-7 in existing designs?
A: LT3517IUF#PBF combines step-down and step-up topologies, fundamentally different from the AP5725WUG-7's step-up-only architecture. While LT3517IUF#PBF provides 1.5A switch current and extended -40°C to 125°C temperature range, the dual-topology design requires different application circuit configuration, inductor selection, and control strategy. This is not a direct substitution and requires complete circuit redesign. LT3517IUF#PBF is suitable for new designs requiring buck-boost capability but not for retrofitting existing AP5725WUG-7 applications.
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