AP5726FDCG-7 Equivalent & Substitute Parts

Part Overview

The AP5726FDCG-7 is an LED Driver IC manufactured by Diodes Incorporated, functioning as a 1-output DC-DC regulator with step-up (boost) topology and PWM dimming capability. Designed for backlight applications, this component delivers 750mA switch current with a 1.2MHz operating frequency and operates across a 2.7V to 5.5V supply voltage range. The device is housed in a 6-UDFN exposed pad package and maintains active product status with full RoHS3 compliance.

Substitute parts become necessary when the primary component experiences supply constraints, inventory limitations, or when design requirements necessitate alternative electrical characteristics such as different output current ratings, switching frequencies, or package configurations.

Key Parameters

Parameter	Value
Manufacturer	Diodes Incorporated
Part Number	AP5726FDCG-7
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
Current Output / Channel	750mA (Switch)
Frequency	1.2MHz
Dimming	PWM
Applications	Backlight
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	6-UDFN Exposed Pad
Product Status	Active
RoHS Status	ROHS3 Compliant
MSL	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the AP5726FDCG-7 is determined by the following critical parameters:

Primary Matching Criteria:

Topology: Step-Up (Boost) DC-DC Regulator
Number of Outputs: 1
Voltage Supply Range: 2.7V minimum to 5.5V maximum
Dimming Method: PWM capability
Applications: Backlight
Operating Temperature Range: -40°C to 85°C
Internal Switch: Present

Secondary Considerations:

Current Output / Channel rating (750mA baseline)
Switching Frequency (1.2MHz baseline)
Package type and form factor
Product Status (Active preferred)
Compliance certifications (RoHS3, REACH)

Substitute parts are grouped into two categories: parametric equivalents with identical electrical specifications and packaging, and manufacturer-recommended alternatives that maintain core functional requirements while offering different current ratings, frequencies, or package options to accommodate design flexibility or supply availability.

Parameter Comparison

Parameter	AP5726FDCG-7	AP5724FDCG-7	BD60A00NUX-TR	ISL97634IRT14Z-T	LM3519MK-20/NOPB	LM3642TLE-LT/NOPB	LT1932ES6#TRPBF	LT1937ES5#TRPBF	LT3491ESC8#TRPBF	LT3518EUF#TRPBF	MAX1599ETA+T
Manufacturer	Diodes Inc.	Diodes Inc.	Rohm Semi.	Intersil	Nat'l Semi.	Texas Inst.	Analog Dev.	Analog Dev.	Analog Dev.	Analog Dev.	Analog Dev./Maxim
Topology	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	SEPIC, Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Down (Buck), Step-Up (Boost)	Step-Up (Boost)
Voltage Supply (Min)	2.7V	2.7V	2.7V	2.4V	2.7V	2.5V	1V	2.5V	2.5V	3V	2.6V
Voltage Supply (Max)	5.5V	5.5V	5.5V	5.5V	5.5V	5.5V	10V	10V	12V	30V	5.5V
Current Output / Channel	750mA (Switch)	750mA (Switch)	30mA	70mA	20mA	1.5A (Flash)	40mA	320mA (Switch)	350mA (Switch)	2.3A (Switch)	950mA (Switch)
Frequency	1.2MHz	1.2MHz	600kHz	1.45MHz	5.4MHz	4MHz	1.2MHz	1.2MHz	2.3MHz	250kHz ~ 2.5MHz	500kHz
Dimming	PWM	PWM	PWM	PWM	PWM	I2C	PWM	Analog, PWM	PWM	Analog, PWM	Analog, PWM
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C
Package / Case	6-UDFN Exposed Pad	6-UDFN Exposed Pad	8-UFDFN Exposed Pad	8-WFDFN Exposed Pad	SOT-23-6 Thin	9-WFBGA, DSBGA	SOT-23-6 Thin	SOT-23-5 Thin	8-VFSOP	16-WQFN Exposed Pad	8-WDFN Exposed Pad
Product Status	Active	Active	Not For New Designs	Active	Active	Active	Active	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

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement):

AP5724FDCG-7 serves as the direct parametric equivalent to AP5726FDCG-7. Both components share identical electrical specifications, operating parameters, and package configuration. The distinction lies in packaging format: AP5726FDCG-7 is supplied in Tape & Reel (TR) format with 19,670 units in stock, while AP5724FDCG-7 is available in Cut Tape (CT) & Digi-Reel® format with 1,525 units in stock. Both maintain Active product status and full RoHS3 compliance. Selection between these two depends solely on packaging and inventory requirements.

Manufacturer-Recommended Alternatives:

The following alternatives are recommended based on Active product status and full compliance certifications:

High Current Output Options (≥750mA):

MAX1599ETA+T (950mA, 500kHz, 8-TDFN): Exceeds current capacity with lower switching frequency, suitable for applications requiring higher output current with reduced EMI.
LT3518EUF#TRPBF (2.3A, 250kHz-2.5MHz, 16-QFN): Highest current capacity with buck-boost topology, extended supply voltage range (3V-30V), and wider operating temperature (-40°C to 125°C). Supports both analog and PWM dimming.

Mid-Range Current Output Options (320mA-350mA):

LT1937ES5#TRPBF (320mA, 1.2MHz, SOT-23-5): Matches switching frequency with extended supply voltage range (2.5V-10V), supports analog and PWM dimming, compact package.
LT3491ESC8#TRPBF (350mA, 2.3MHz, SC-70-8): Similar current capacity with higher switching frequency, extended supply voltage range (2.5V-12V), PWM dimming only.

Specialized Application Options:

LM3642TLE-LT/NOPB (1.5A Flash, 4MHz, 9-DSBGA): Designed for camera flash applications with I2C dimming control, higher current capacity, compact BGA package.
ISL97634IRT14Z-T (70mA, 1.45MHz, 8-TDFN): SEPIC topology option with extended supply voltage range (2.4V-5.5V), suitable for applications requiring buck-boost capability.
LT1932ES6#TRPBF (40mA, 1.2MHz, SOT-23-6): Lowest current option with widest supply voltage range (1V-10V), suitable for ultra-low power backlight applications.

Not Recommended for New Designs:

BD60A00NUX-TR (30mA, 600kHz, VSON008X2030): Marked as "Not For New Designs" despite meeting core functional requirements. Avoid for new product development.

Compliance Baseline: All recommended alternatives maintain RoHS3 compliance, REACH unaffected status, and EAR99 ECCN classification, matching the regulatory posture of the primary component.

Frequently Asked Questions (FAQ)

Q: Can AP5724FDCG-7 be used as a direct replacement for AP5726FDCG-7?

A: Yes. AP5724FDCG-7 is a parametric equivalent with identical electrical specifications, operating parameters, and package type (6-UDFN Exposed Pad). The only difference is packaging format: AP5726FDCG-7 uses Tape & Reel (TR) while AP5724FDCG-7 uses Cut Tape (CT) & Digi-Reel®. Selection depends on your assembly process requirements.

Q: What is the minimum current output requirement for a valid substitute?

A: The AP5726FDCG-7 delivers 750mA switch current. Substitutes with lower current ratings (such as BD60A00NUX-TR at 30mA or ISL97634IRT14Z-T at 70mA) are not suitable for applications requiring the full 750mA capacity. However, they may be acceptable for designs with reduced current demands. Verify your application's actual current requirements before selecting a lower-rated alternative.

Q: Are all substitute parts compatible with the same PCB layout?

A: No. While all substitutes maintain the same topology and core functionality, package differences affect PCB compatibility. AP5724FDCG-7 uses the same 6-UDFN package as the primary part. Other alternatives use different packages: SOT-23-5, SOT-23-6, SC-70-8, 8-TDFN, 8-UFDFN, 9-DSBGA, 16-QFN, and 8-WDFN. PCB redesign is required when switching to alternatives with different package types.

Q: Why is BD60A00NUX-TR marked "Not For New Designs"?

A: BD60A00NUX-TR carries a "Not For New Designs" status from Rohm Semiconductor, indicating the manufacturer is phasing out this component. While it meets functional requirements, it is not recommended for new product development due to potential future supply discontinuation and lack of manufacturer support.

Q: What is the difference between PWM and I2C dimming?

A: PWM (Pulse Width Modulation) dimming controls LED brightness by varying the duty cycle of a digital signal, requiring a dedicated PWM input pin. I2C dimming uses a serial communication protocol for brightness control, enabling more sophisticated dimming profiles and integration with microcontroller-based systems. The AP5726FDCG-7 uses PWM dimming. LM3642TLE-LT/NOPB uses I2C dimming and requires different firmware implementation.

Q: Can I use LT3518EUF#TRPBF in place of AP5726FDCG-7?

A: LT3518EUF#TRPBF is functionally compatible but requires design considerations. It offers higher current capacity (2.3A vs. 750mA), buck-boost topology (vs. boost-only), wider supply voltage range (3V-30V vs. 2.7V-5.5V), and higher operating temperature range (-40°C to 125°C vs. -40°C to 85°C). The 16-QFN package requires PCB redesign. Use this alternative only if your application benefits from these enhanced specifications.

Q: What is the significance of the 1.2MHz switching frequency?

A: The 1.2MHz switching frequency determines the size and cost of external passive components (inductor and capacitor). Higher frequencies allow smaller components but increase EMI. Lower frequencies reduce EMI but require larger components. AP5726FDCG-7 operates at 1.2MHz. Substitutes with different frequencies (600kHz to 5.4MHz) may require external component redesign and PCB layout modifications.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts maintain RoHS3 compliance, matching the regulatory requirement of the primary component. All are also REACH unaffected and classified as EAR99 for export control purposes.

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