AP3605FNTR-E1 Equivalent & Substitute Parts

Part Overview

The AP3605FNTR-E1 is a LED Driver IC with integrated 4-output DC DC regulator utilizing switched capacitor (charge pump) topology for PWM dimming applications. Manufactured by Diodes Incorporated, this component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. The part delivers 20mA per output channel across a 2.7V to 5.5V supply range in a compact 16-QFN (3x3) surface mount package.

Substiute Parts

AP3605FNTR-E1

Diodes IncorporatedIn Stock: 5388AP3605FNTR-E1 Datasheet

Current PartRFQ

ADM8843ACPZ-REEL7

Analog Devices Inc.In Stock: 10605ADM8843ACPZ-REEL7 Datasheet

MFR RecommendedRFQ

BD9394EFV-E2

Rohm SemiconductorIn Stock: 3637BD9394EFV-E2 Datasheet

MFR RecommendedRFQ

LM27951SDX/NOPB

Texas InstrumentsIn Stock: 3296LM27951SDX/NOPB Datasheet

MFR RecommendedRFQ

MP1519DQ-LF-Z

Monolithic Power Systems Inc.In Stock: 25251MP1519DQ-LF-Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AP3605FNTR-E1 is determined by the following critical parameters:

Primary Matching Criteria:

• Topology: Switched Capacitor (Charge Pump)
• Number of Outputs: 4
• Dimming Control: PWM
• Supply Voltage Range: Minimum 2.7V, Maximum 5.5V
• Current Capability: Minimum 20mA per channel
• Package Type: Surface mount with exposed pad
• Operating Temperature: -40°C to 85°C

Acceptable Variation Ranges:

• Switching Frequency: 750kHz to 1.5MHz
• Current per Channel: 20mA or greater
• Supply Voltage Minimum: 2.5V to 2.8V acceptable
• Supply Voltage Maximum: 5.5V required

Three substitute parts meet these criteria with active product status: ADM8843ACPZ-REEL7 (Analog Devices), LM27951SDX/NOPB (Texas Instruments), and MP1519DQ-LF-Z (Monolithic Power Systems). The BD9394EFV-E2 (Rohm Semiconductor) utilizes step-up boost topology and operates at higher supply voltages (9V to 35V), making it unsuitable for direct substitution in applications requiring charge pump topology at 2.7V to 5.5V input range.

Parameter Comparison

Engineering Selection Recommendations

ADM8843ACPZ-REEL7 is the primary recommended substitute. This Analog Devices component maintains identical topology, output count, and supply voltage range while offering active product status with higher inventory availability (10,584 units). The 1.5MHz switching frequency provides improved efficiency margins. Package compatibility requires evaluation as the 16-LFCSP-VQ differs from the original 16-VFQFN, though both are 3x3mm surface mount options with exposed pads. Moisture sensitivity level remains at MSL 3.

LM27951SDX/NOPB from Texas Instruments provides an alternative with superior current capability (30mA per channel) and improved moisture sensitivity (MSL 1, unlimited). The 14-WSON package represents a different footprint requiring PCB layout modification. Lower switching frequency (750kHz) may impact thermal performance in high-frequency applications. This option suits designs requiring enhanced current headroom and long-term storage reliability.

MP1519DQ-LF-Z from Monolithic Power Systems maintains the original 16-QFN (3x3) package footprint, simplifying PCB migration. Active product status and highest inventory (25,200 units) ensure supply continuity. The dimming control utilizes analog rather than PWM methodology, requiring circuit design adaptation if PWM dimming is application-critical. Current capability (22mA) and MSL 1 rating provide operational advantages.

All three substitutes maintain ROHS3 compliance and -40°C to 85°C operating temperature range. Selection should prioritize package compatibility, dimming control methodology requirements, and current capacity needs specific to the application.

Frequently Asked Questions (FAQ)

Q: Can the BD9394EFV-E2 substitute for the AP3605FNTR-E1?

A: No. The BD9394EFV-E2 utilizes step-up boost topology requiring 9V to 35V supply input, incompatible with the 2.7V to 5.5V range of the AP3605FNTR-E1. Topology mismatch and supply voltage incompatibility eliminate this option.

Q: What is the primary difference between ADM8843ACPZ-REEL7 and MP1519DQ-LF-Z?

A: The ADM8843ACPZ-REEL7 uses PWM dimming control identical to the original part, while MP1519DQ-LF-Z employs analog dimming. The ADM8843 package is 16-LFCSP-VQ versus MP1519's 16-QFN (3x3). MP1519 maintains the original package footprint, simplifying PCB layout migration.

Q: Does LM27951SDX/NOPB require PCB redesign?

A: Yes. The 14-WSON (4x3) package differs from the original 16-VFQFN (3x3), requiring footprint modification and potential layout adjustments. However, the improved current capability (30mA) and MSL 1 rating may justify redesign effort for applications requiring enhanced performance margins.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All three recommended substitutes (ADM8843ACPZ-REEL7, LM27951SDX/NOPB, and MP1519DQ-LF-Z) maintain ROHS3 compliance and operate within the -40°C to 85°C temperature range.

Q: Which substitute offers the best supply chain availability?

A: MP1519DQ-LF-Z provides the highest inventory (25,200 units), followed by ADM8843ACPZ-REEL7 (10,584 units) and LM27951SDX/NOPB (3,268 units). Inventory levels should be verified with current suppliers for production planning.

Q: Can I use multiple substitutes interchangeably in production?

A: No. Each substitute requires specific circuit design considerations. ADM8843ACPZ-REEL7 and LM27951SDX/NOPB maintain PWM dimming compatibility with the original design. MP1519DQ-LF-Z requires analog dimming circuit adaptation. Package differences necessitate separate PCB layouts for each option.