AP5724WUG-7 Equivalent & Substitute Parts

Part Overview

The AP5724WUG-7 is an LED driver IC manufactured by Diodes Incorporated, classified as a Power Management PMIC. It functions as a single-output DC-DC regulator with Step-Up (Boost) topology, featuring PWM dimming capability and an internal switch rated for 750mA. The device operates across a 2.7V to 5.5V supply range at 1.2MHz switching frequency, designed primarily for backlight applications in consumer electronics.

The AP5724WUG-7 maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts become necessary when Cut Tape packaging is unavailable, when higher current capacity is required, or when alternative topologies better suit specific application constraints.

Key Parameters

Parameter	Value
Manufacturer	Diodes Incorporated
Part Number	AP5724WUG-7
Type	DC DC Regulator
Topology	Step-Up (Boost)
Number of Outputs	1
Voltage Supply Range	2.7V to 5.5V
Current Output / Channel	750mA (Switch)
Switching Frequency	1.2MHz
Dimming Control	PWM
Package / Case	SOT-23-6 Thin, TSOT-23-6
Operating Temperature	-40°C to 85°C (TA)
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution logic for the AP5724WUG-7 is based on the following critical parameters:

Primary Substitution Criteria:

Topology: Step-Up (Boost) DC-DC Regulator
Number of Outputs: Single output
Supply Voltage Range: 2.7V to 5.5V minimum overlap
Current Capacity: 750mA switch current or higher
Dimming Control: PWM capability
Package Compatibility: Surface mount with TSOT-23-6 or equivalent footprint
Compliance: RoHS3 and MSL 1 rating

Grouping Strategy:

Group 1 - Parametric Equivalents (Same Package Family): Parts maintaining TSOT-23-6 packaging with identical electrical specifications enable direct substitution without PCB redesign.

Group 2 - Functional Equivalents (Higher Current Capacity): Parts with 750mA or greater switch current, matching supply voltage range, and PWM dimming support alternative designs when packaging flexibility exists.

Group 3 - Topology Variants (Switched Capacitor): Parts using alternative topologies (Switched Capacitor/Charge Pump) with compatible voltage and current specifications for applications where boost topology is not mandatory.

Group 4 - Extended Operating Range: Parts with expanded temperature or voltage specifications for applications requiring enhanced environmental performance.

Parameter Comparison

Part Number	Manufacturer	Topology	Supply Voltage (Min-Max)	Current Output (Switch)	Frequency	Dimming	Package	Operating Temp	Product Status
AP5724WUG-7	Diodes Inc.	Step-Up (Boost)	2.7V - 5.5V	750mA	1.2MHz	PWM	TSOT-23-6	-40°C to 85°C	Active
AP5726WUG-7	Diodes Inc.	Step-Up (Boost)	2.7V - 5.5V	750mA	1.2MHz	PWM	TSOT-23-6	-40°C to 85°C	Active
MIC2292-15YML-TR	Microchip	Step-Up (Boost)	2.5V - 10V	750mA	1.6MHz	Analog, PWM	8-MLF® (2x2)	-40°C to 125°C	Active
MIC2289-34YML-TR	Microchip	Step-Up (Boost)	2.5V - 10V	750mA	1.2MHz	Analog, PWM	8-MLF® (2x2)	-40°C to 125°C	Active
LT3491ESC8#TRMPBF	Analog Devices	Step-Up (Boost)	2.5V - 12V	350mA	2.3MHz	PWM	SC-70-8	-40°C to 85°C	Active
LT3591EDDB#TRMPBF	Analog Devices	Step-Up (Boost)	2.5V - 12V	500mA	1MHz	PWM	8-DFN (3x2)	-40°C to 85°C	Active
MAX1553ETA+T	Analog Devices/Maxim	Step-Up (Boost)	2.7V - 5.5V	480mA	-	Analog, PWM	8-TDFN (3x3)	-40°C to 85°C	Active
LM3508TLX/NOPB	Texas Instruments	Step-Up (Boost)	2.7V - 5.5V	30mA	850kHz	PWM	9-DSBGA	-30°C to 85°C	Active
LM3530UME-40/NOPB	Texas Instruments	Step-Up (Boost)	2.7V - 5.5V	30mA	500kHz	PWM	12-DSBGA	-40°C to 85°C	Active
BD6072HFN-TR	Rohm Semiconductor	Step-Up (Boost)	2.7V - 5.5V	35mA	1MHz	PWM	8-HSON	-30°C to 85°C	Not For New Designs
LTC3202EDD	Analog Devices	Switched Capacitor (Charge Pump)	2.7V - 4.5V	125mA	1.5MHz	PWM	10-DFN (3x3)	-40°C to 85°C	Active

Engineering Selection Recommendations

Direct Substitution (No Design Changes Required):

AP5726WUG-7 is the primary direct substitute. It maintains identical electrical specifications (2.7V-5.5V supply, 750mA switch current, 1.2MHz frequency, PWM dimming) and package format (TSOT-23-6). The only difference is packaging configuration (Tape & Reel vs. Cut Tape). Both parts carry Active product status and full RoHS3 compliance. This substitution requires no circuit modifications.

Functional Substitution (Design Flexibility Required):

MIC2289-34YML-TR and MIC2292-15YML-TR from Microchip Technology provide 750mA switch current matching the AP5724WUG-7 with extended supply voltage range (2.5V-10V) and enhanced operating temperature (-40°C to 125°C). Both support PWM dimming and maintain Active status with RoHS3 compliance. Package change from TSOT-23-6 to 8-MLF® (2x2) requires PCB layout modification. MIC2289-34YML-TR operates at 1.2MHz (matching AP5724WUG-7), while MIC2292-15YML-TR operates at 1.6MHz.

Limited Current Applications:

LT3491ESC8#TRMPBF (Analog Devices) provides 350mA switch current with extended supply range (2.5V-12V) and higher switching frequency (2.3MHz). Suitable only for applications requiring less than 350mA output current. Package is SC-70-8, requiring PCB redesign.

LT3591EDDB#TRMPBF (Analog Devices) provides 500mA switch current, intermediate between LT3491 and AP5724WUG-7. Supply range extends to 12V with 1MHz switching frequency. Package is 8-DFN (3x2).

Lower Current Alternatives:

LM3508TLX/NOPB and LM3530UME-40/NOPB (Texas Instruments) provide only 30mA switch current, suitable exclusively for low-power backlight applications. Both maintain 2.7V-5.5V supply compatibility and PWM dimming. LM3530UME-40/NOPB extends operating temperature to -40°C. Package formats are 9-DSBGA and 12-DSBGA respectively, requiring significant PCB redesign.

Topology Alternative:

LTC3202EDD (Analog Devices) uses Switched Capacitor (Charge Pump) topology instead of Step-Up (Boost). Supply range is restricted to 2.7V-4.5V with 125mA current capacity. Suitable only for applications where boost topology is not mandatory and supply voltage remains below 4.5V. Active product status with RoHS3 compliance.

Not Recommended for New Designs:

BD6072HFN-TR (Rohm Semiconductor) carries "Not For New Designs" status despite meeting electrical specifications. This designation indicates manufacturer discontinuation trajectory. Avoid for new product development.

Compliance Verification:

All recommended substitutes maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the AP5724WUG-7 environmental specifications. All active-status parts carry REACH Unaffected and EAR99 ECCN classifications identical to the original part.

Frequently Asked Questions (FAQ)

Q: Can AP5726WUG-7 replace AP5724WUG-7 directly without circuit changes?

A: Yes. AP5726WUG-7 is a parametric equivalent with identical electrical specifications (2.7V-5.5V supply, 750mA switch current, 1.2MHz frequency, PWM dimming) and package format (TSOT-23-6). The only difference is packaging configuration (Tape & Reel vs. Cut Tape). No PCB modifications are required.

Q: Why do Microchip MIC2289-34YML-TR and MIC2292-15YML-TR have different frequencies despite matching current ratings?

A: Both parts provide 750mA switch current and PWM dimming capability, but operate at different switching frequencies (1.2MHz vs. 1.6MHz). Frequency selection affects power dissipation, EMI characteristics, and component sizing. MIC2289-34YML-TR matches the AP5724WUG-7 frequency exactly. MIC2292-15YML-TR's higher frequency may reduce inductor size but increases switching losses. Selection depends on application EMI requirements and thermal constraints.

Q: What is the key limitation of LT3491ESC8#TRMPBF compared to AP5724WUG-7?

A: LT3491ESC8#TRMPBF provides only 350mA switch current versus 750mA in the AP5724WUG-7. This 53% reduction in current capacity restricts its use to lower-power backlight applications. It compensates with extended supply voltage range (2.5V-12V) and higher switching frequency (2.3MHz). Use only when application current requirements are confirmed below 350mA.

Q: Can LTC3202EDD replace AP5724WUG-7 in all applications?

A: No. LTC3202EDD uses Switched Capacitor (Charge Pump) topology instead of Step-Up (Boost), with restricted supply range (2.7V-4.5V) and lower current capacity (125mA). It is suitable only for applications where: (1) boost topology is not mandatory, (2) supply voltage remains below 4.5V, and (3) output current does not exceed 125mA. Verify application requirements before substitution.

Q: Why is BD6072HFN-TR marked "Not For New Designs"?

A: "Not For New Designs" designation indicates the manufacturer (Rohm Semiconductor) has discontinued active development and is transitioning the part to end-of-life status. While the part may still function electrically, using it in new product development creates supply chain risk and limits long-term availability. Avoid for new designs; use only for legacy product maintenance.

Q: What package considerations apply when switching from TSOT-23-6 to 8-MLF® (2x2)?

A: TSOT-23-6 and 8-MLF® (2x2) have different footprints, pin counts, and thermal characteristics. TSOT-23-6 is a 6-pin package; 8-MLF® is an 8-pin package. PCB layout must be redesigned to accommodate the new footprint. 8-MLF® includes an exposed pad for improved thermal dissipation, potentially reducing junction temperature. Verify schematic pin assignments match before layout redesign.

Q: Are all substitute parts RoHS3 compliant like the AP5724WUG-7?

A: Yes. All recommended substitute parts in this reference carry RoHS3 compliance certification. All maintain MSL 1 (Unlimited) moisture sensitivity rating, matching the AP5724WUG-7 environmental specifications. Compliance documentation is available from respective manufacturers.

Q: What is the temperature operating range difference between AP5724WUG-7 and Microchip alternatives?

A: AP5724WUG-7 operates from -40°C to 85°C (TA). Microchip MIC2289-34YML-TR and MIC2292-15YML-TR extend the upper limit to 125°C (TJ), providing 40°C additional thermal margin. This extended range is beneficial for applications in high-ambient-temperature environments or where thermal management is constrained. Lower temperature limit remains -40°C for all parts.

Q: Can MAX1553ETA+T substitute for AP5724WUG-7 in backlight applications?

A: MAX1553ETA+T is functionally compatible with 2.7V-5.5V supply range and PWM dimming support, but provides only 480mA switch current (64% of AP5724WUG-7 capacity). It supports both Analog and PWM dimming, offering additional control flexibility. Use only when application current requirements are confirmed below 480mA. Package change from TSOT-23-6 to 8-TDFN (3x3) requires PCB redesign.

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