AP3030KTR-E1 Equivalent & Substitute Parts

Part Overview

The AP3030KTR-E1 is an LED Driver IC manufactured by Diodes Incorporated, designed as a 1-output DC-DC regulator with step-up (boost) topology and analog dimming capability. This component operates in the 2.5V to 16V supply range and is optimized for backlight applications at 1.2MHz switching frequency in a compact SOT-23-6 surface mount package.

The AP3030KTR-E1 is classified as obsolete. Identifying functionally equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for applications currently utilizing this component.

Key Parameters

Parameter	Value
Manufacturer Part Number	AP3030KTR-E1
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Type	DC DC Regulator
Topology	Step-Up (Boost)
Package / Case	SOT-23-6
Number of Outputs	1
Voltage - Supply (Min)	2.5V
Voltage - Supply (Max)	16V
Frequency	1.2MHz
Dimming	Analog
Internal Switch(s)	Yes
Applications	Backlight
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the AP3030KTR-E1 are selected based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

Topology: Step-Up (Boost) DC-DC Regulator
Number of Outputs: 1
Voltage Supply Range: Minimum 2.5V, Maximum ≥16V
Switching Frequency: 1.2MHz (±tolerance acceptable)
Dimming Capability: Analog or Analog + PWM
Applications: Backlight
Internal Switch: Yes
Operating Temperature Range: -40°C minimum, 85°C maximum

Secondary Considerations:

Package compatibility (surface mount preferred)
RoHS3 compliance
Product status (active preferred over obsolete)
Moisture sensitivity level

Substitute parts are grouped into two categories based on topology alignment and application suitability:

Group 1: Step-Up (Boost) Topology with Backlight Application

LM3508TL/NOPB
LM3530TMX-40/NOPB
LT1937ESC6#TRPBF

These parts maintain the boost topology and backlight application focus, with supply voltage ranges and switching frequencies compatible with the AP3030KTR-E1 operational envelope.

Group 2: Step-Up (Boost) Topology with Camera Flash Application

ADP1653ACPZ-R7
LM3556TMX/NOPB
LM3642TLE/NOPB
LM3642TLX-LT/NOPB
LM3642TLX/NOPB

These parts share the boost topology and supply voltage compatibility but are optimized for camera flash applications with I2C dimming control and higher current output capabilities.

Group 3: Step-Down (Buck) Topology

A6216KLPTR-T
LT3474IFE-1#PBF

These parts employ step-down topology and are included as functional alternatives where input voltage exceeds typical boost regulator limits, though they represent a different architectural approach.

Parameter Comparison

Parameter	AP3030KTR-E1	LM3508TL/NOPB	LM3530TMX-40/NOPB	LT1937ESC6#TRPBF	ADP1653ACPZ-R7	LM3556TMX/NOPB	LM3642TLE/NOPB	A6216KLPTR-T	LT3474IFE-1#PBF
Topology	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Down (Buck)	Step-Down (Buck)
Number of Outputs	1	1	1	1	1	1	1	1	1
Voltage - Supply (Min)	2.5V	2.7V	2.7V	2.5V	3V	2.5V	2.5V	4.5V	4.6V
Voltage - Supply (Max)	16V	5.5V	5.5V	10V	5.5V	5.5V	5.5V	55V	36V
Frequency	1.2MHz	850kHz	500kHz	1.2MHz	1.2MHz	4MHz	4MHz	—	200kHz ~ 2MHz
Dimming	Analog	PWM	PWM	Analog, PWM	I2C	I2C	I2C	Analog, PWM	PWM
Current - Output / Channel	—	30mA	30mA	320mA (Switch)	500mA (Flash)	1.5A (Flash)	1.5A (Flash)	2A	1A
Applications	Backlight	Backlight	Backlight	Backlight	Camera Flash	Camera Flash	Camera Flash	—	Backlight
Operating Temperature	-40°C ~ 85°C	-30°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	SOT-23-6	9-WFBGA, DSBGA	12-WFBGA, DSBGA	6-TSSOP, SC-88, SOT-363	16-VFQFN Exposed Pad, CSP	16-WFBGA, DSBGA	9-WFBGA, DSBGA	16-TSSOP (0.173", 4.40mm Width) Exposed Pad	16-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed are RoHS3 compliant and meet environmental regulatory requirements equivalent to the AP3030KTR-E1. The following selection guidance is based on product status and compliance posture:

Recommended Primary Substitutes (Backlight Application, Boost Topology):

LT1937ESC6#TRPBF is the closest functional equivalent. It maintains step-up topology, 1.2MHz switching frequency, analog and PWM dimming capability, and backlight application focus. Operating temperature range (-40°C to 85°C) matches the original part. Supply voltage range (2.5V to 10V) covers the AP3030KTR-E1 operational envelope. Active product status ensures long-term availability. Package form factor (SC-70-6) differs from SOT-23-6, requiring PCB layout modification.

LM3508TL/NOPB and LM3530TMX-40/NOPB are active boost regulators optimized for backlight applications. Both maintain the required supply voltage minimum of 2.5V and operate within the -40°C to 85°C temperature range. Switching frequencies (850kHz and 500kHz respectively) differ from the original 1.2MHz specification. Both employ PWM dimming rather than analog dimming. Package formats (9-DSBGA and 12-DSBGA) require layout redesign.

Secondary Substitutes (Camera Flash Application, Boost Topology):

LM3556TMX/NOPB, LM3642TLE/NOPB, LM3642TLX-LT/NOPB, and LM3642TLX/NOPB are active boost regulators with I2C dimming control. These parts maintain 2.5V minimum supply voltage and -40°C to 85°C operating temperature compatibility. Higher switching frequencies (4MHz) and increased current output (1.5A flash) represent functional enhancements. Application focus differs (camera flash versus backlight). Package formats (9-DSBGA and 16-DSBGA) require layout redesign. ADP1653ACPZ-R7 offers similar boost topology with I2C dimming but operates at 1.2MHz and 500mA flash current, with narrower supply voltage range (3V to 5.5V).

Alternative Topology Substitutes (Step-Down, Buck Topology):

A6216KLPTR-T and LT3474IFE-1#PBF employ step-down topology and are suitable only where input voltage exceeds typical boost regulator limits. A6216KLPTR-T supports 4.5V to 55V input range with 2A output current and PWM/analog dimming. LT3474IFE-1#PBF supports 4.6V to 36V input range with 1A output current and PWM dimming. Both are active products with extended temperature ranges (-40°C to 125°C). Circuit topology change requires complete redesign of power stage and control loop.

Frequently Asked Questions (FAQ)

Q: Can LM3508TL/NOPB directly replace AP3030KTR-E1 without circuit modification?

A: No. While both are boost regulators for backlight applications, LM3508TL/NOPB operates at 850kHz versus the AP3030KTR-E1's 1.2MHz, uses PWM dimming instead of analog dimming, and employs a 9-DSBGA package instead of SOT-23-6. PCB layout redesign and control circuit modification are required.

Q: What is the key difference between LT1937ESC6#TRPBF and AP3030KTR-E1?

A: LT1937ESC6#TRPBF maintains the same 1.2MHz switching frequency, analog and PWM dimming capability, and backlight application focus as AP3030KTR-E1. The primary difference is package form factor: SC-70-6 versus SOT-23-6. Supply voltage range differs slightly (2.5V to 10V versus 2.5V to 16V), which may affect applications requiring higher input voltages.

Q: Why are camera flash LED drivers (LM3556TMX/NOPB, LM3642 series) listed as substitutes for a backlight application part?

A: Camera flash drivers share the same boost topology, supply voltage compatibility (2.5V minimum), and operating temperature range (-40°C to 85°C) as the AP3030KTR-E1. While optimized for different applications, they provide functional equivalence in terms of power conversion architecture. Application-specific circuit design modifications are necessary.

Q: Can step-down (buck) topology parts like LT3474IFE-1#PBF replace the AP3030KTR-E1?

A: Step-down topology represents a fundamentally different power conversion architecture. LT3474IFE-1#PBF is suitable only where input voltage exceeds the boost regulator's maximum rating. Complete power stage redesign is required, including inductor, capacitor, and control loop modifications.

Q: What is the significance of the AP3030KTR-E1 being classified as obsolete?

A: Obsolete status indicates the part is no longer manufactured by Diodes Incorporated and existing inventory is limited. All listed substitute parts maintain active product status, ensuring long-term availability, ongoing technical support, and continued manufacturing commitment from their respective manufacturers.

Q: Are all substitute parts RoHS3 compliant like the AP3030KTR-E1?

A: Yes. All substitute parts listed in this document are RoHS3 compliant, meeting the same environmental and regulatory requirements as the AP3030KTR-E1.

Q: What package considerations should guide substitute part selection?

A: The AP3030KTR-E1 uses SOT-23-6 packaging. Most substitute parts employ different packages (DSBGA, TSSOP, LFCSP, SC-70). Package selection impacts PCB layout, thermal management, and assembly process compatibility. Evaluate package availability, assembly capability, and thermal performance requirements for your specific application before finalizing substitution.

Q: Which substitute part offers the closest match to AP3030KTR-E1 specifications?

A: LT1937ESC6#TRPBF provides the closest functional match, maintaining 1.2MHz switching frequency, analog and PWM dimming capability, backlight application focus, and identical operating temperature range. Package form factor differs, requiring layout modification. This part is recommended as the primary substitute for backlight applications.

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