LM2707MF/NOPB LED Driver IC Equivalent & Substitute Parts

Part Overview

The LM2707MF/NOPB is a LED Driver IC manufactured by Texas Instruments, classified as a Power Management PMIC. It functions as a 1-output DC DC regulator with Step-Up (Boost) topology, delivering 18V output at 30mA with PWM dimming capability for backlight applications. The device operates across a 2.3V to 7V supply range in a SOT-23-8 surface mount package.

This part is marked as Obsolete, making equivalent and substitute parts necessary for ongoing production and design continuity. Substitute parts must maintain functional compatibility across critical electrical parameters including topology, dimming capability, output voltage range, and thermal operating specifications.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM2707MF/NOPB
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Type	DC DC Regulator
Topology	Step-Up (Boost)
Package / Case	SOT-23-8
Voltage - Supply (Min)	2.3V
Voltage - Supply (Max)	7V
Voltage - Output	18V
Current - Output / Channel	30mA
Dimming	PWM
Internal Switch(s)	Yes
Number of Outputs	1
Operating Temperature	-30°C ~ 85°C (TA)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the LM2707MF/NOPB is determined by the following critical parameters:

Primary Substitution Criteria:

Topology: Step-Up (Boost) configuration with internal switch
Dimming Method: PWM capability
Output Voltage: 18V or higher output capability
Output Current: Minimum 30mA channel current
Supply Voltage Range: Compatibility with 2.3V to 7V input
Package Type: Surface mount with pin-compatible or functionally equivalent footprint
Thermal Range: Operating temperature of -30°C to 85°C or broader
Compliance: ROHS3 compliant, REACH unaffected

Substitute Parts Identified:

Group 1 - Direct Boost Topology Substitutes (SOT-23 Family):

AP3031KTR-G1 (Diodes Incorporated) - Active status, higher current capability
AP3036BKTR-G1 (Diodes Incorporated) - Active status, moderate current capability
LT1937ES5#TRMPBF (Analog Devices Inc.) - Active status, higher output voltage
LT1937ESC6#TRPBF (Analog Devices Inc.) - Active status, alternative package

Group 2 - Boost Topology with Extended Features:

AP5725WG-7 (Diodes Incorporated) - Active status, higher current, limited supply range
BD60A00NUX-TR (Rohm Semiconductor) - Not for new designs, compact package

Group 3 - Buck or Buck-Boost Topology (Alternative Architectures):

IS31LT3352-V1GRLS2-TR (Lumissil Microsystems) - Active status, Step-Down topology
IS31LT3360-SDLS3-TR (Lumissil Microsystems) - Active status, Step-Down topology, automotive grade
ISL78100ARZ-T (Renesas Electronics Corporation) - Active status, dual topology (Buck/Boost), automotive grade

Group 4 - Legacy/Restricted Status:

BD60910GU-E2 (ROHM Semiconductor) - Not for new designs, alternative package

Parameter Comparison

Parameter	LM2707MF/NOPB	AP3031KTR-G1	AP3036BKTR-G1	AP5725WG-7	LT1937ES5#TRMPBF	ISL78100ARZ-T
Manufacturer	Texas Instruments	Diodes Inc.	Diodes Inc.	Diodes Inc.	Analog Devices	Renesas
Topology	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Down/Step-Up
Package / Case	SOT-23-8	TSOT-23-6	SOT-23-6	SOT-26	TSOT-23-5	20-QFN (4x4)
Voltage - Supply (Min)	2.3V	2.7V	2.5V	2.7V	2.5V	2.7V
Voltage - Supply (Max)	7V	16V	16V	5.5V	10V	16V
Voltage - Output	18V	Not specified	Not specified	26V	36V	32V
Current - Output / Channel	30mA	1.4A (Switch)	550mA (Switch)	750mA (Switch)	320mA (Switch)	1A
Frequency	Not specified	1MHz	1MHz	1.2MHz	1.2MHz	1MHz
Dimming	PWM	PWM	PWM	PWM	Analog, PWM	Analog, PWM
Operating Temperature	-30°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 105°C
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)

Engineering Selection Recommendations

For Direct Replacement (Active Status, Boost Topology):

AP3036BKTR-G1 is the primary recommendation for designs requiring minimal circuit modification. It maintains Step-Up (Boost) topology with PWM dimming, operates within compatible supply voltage ranges (2.5V to 16V), and is in Active product status. The 550mA switch current exceeds the original 30mA requirement. Package footprint differs (SOT-23-6 vs SOT-23-8), requiring PCB layout adjustment.

AP3031KTR-G1 offers higher switch current capability (1.4A) and extended supply voltage range (2.7V to 16V) in TSOT-23-6 package. Active status ensures long-term availability. Package compatibility requires evaluation.

LT1937ES5#TRMPBF (Analog Devices) provides Step-Up topology with higher output voltage capability (36V) and dual dimming modes (Analog and PWM). TSOT-23-5 package requires footprint redesign. Active status and unlimited MSL provide manufacturing flexibility.

For Applications Requiring Extended Temperature Range:

ISL78100ARZ-T (Renesas) operates to 105°C and includes AEC-Q100 automotive qualification. Dual topology (Step-Down/Step-Up) provides design flexibility. 20-QFN package requires significant PCB layout changes. Active status and automotive-grade certification support long-term production.

For Legacy Design Continuity (Not For New Designs):

BD60A00NUX-TR (Rohm) maintains 30mA output current matching the original specification but carries "Not For New Designs" status. Suitable only for sustaining existing production where redesign is not feasible.

Compliance Verification:

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, matching the original part's regulatory requirements. Moisture sensitivity levels vary; designs with MSL-sensitive assembly processes should prioritize parts with MSL 1 rating (unlimited storage).

Frequently Asked Questions (FAQ)

Q: Can AP3036BKTR-G1 directly replace LM2707MF/NOPB without circuit modification?

A: AP3036BKTR-G1 maintains the same Step-Up (Boost) topology and PWM dimming capability. However, package footprint differs (SOT-23-6 vs SOT-23-8), requiring PCB layout changes. Electrical parameters are compatible within design margins. Pin configuration must be verified against datasheets before implementation.

Q: Why are some substitutes listed as Step-Down (Buck) topology when the original is Step-Up (Boost)?

A: IS31LT3352-V1GRLS2-TR and IS31LT3360-SDLS3-TR use Step-Down topology, which is fundamentally different from the original Step-Up architecture. These are listed as alternatives only for applications where input voltage exceeds desired output voltage. They are not direct functional replacements and require complete circuit redesign.

Q: What is the significance of Product Status (Active vs. Not For New Designs)?

A: Active status indicates the manufacturer continues production and supports long-term availability. "Not For New Designs" status signals end-of-life trajectory; these parts are suitable only for sustaining existing production. New designs should prioritize Active status parts to ensure supply chain continuity.

Q: How do supply voltage ranges affect substitution compatibility?

A: The original LM2707MF/NOPB operates from 2.3V to 7V. Substitutes with wider ranges (e.g., 2.7V to 16V) are compatible but may require input filtering adjustments. Substitutes with narrower maximum voltage (e.g., AP5725WG-7 at 5.5V max) are incompatible with 7V supply designs.

Q: What does MSL (Moisture Sensitivity Level) mean for component selection?

A: MSL defines storage and handling requirements. MSL 1 (Unlimited) allows indefinite shelf storage. MSL 3 (168 Hours) requires baking before reflow if storage exceeds 168 hours. Manufacturing processes with extended component storage should prioritize MSL 1 parts to reduce process risk.

Q: Are package differences between SOT-23-8 and SOT-23-6 significant?

A: Yes. SOT-23-8 has 8 pins; SOT-23-6 has 6 pins. Pin count and spacing differ, requiring PCB redesign. Footprint libraries are not interchangeable. Pin function mapping must be verified against individual datasheets before layout implementation.

Q: Can LT1937ES5#TRMPBF be used in applications requiring only PWM dimming?

A: Yes. LT1937ES5#TRMPBF supports both Analog and PWM dimming modes. PWM-only applications can use this part; the Analog dimming capability remains unused. The higher output voltage (36V) and switch current (320mA) provide design margin above the original 18V, 30mA specification.

Q: What is the advantage of ISL78100ARZ-T's dual topology (Buck/Boost)?

A: Dual topology allows operation as either Step-Down or Step-Up depending on input/output voltage relationship. This flexibility supports multiple application scenarios without topology-specific redesign. Automotive qualification (AEC-Q100) and extended temperature range (-40°C to 105°C) add robustness for demanding environments.

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