LP3954RL/NOPB LED Driver IC Equivalent & Substitute Parts

Part Overview

The LP3954RL/NOPB is a 13-output LED driver IC with integrated DC-DC boost regulator, designed for backlight and camera flash applications. This part features PWM dimming capability, 900mA switch current, and operates across a 3V to 5.5V supply range with output voltage regulation from 4V to 5.3V. The LP3954RL/NOPB is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Base Product Number	LP3954
Type	DC DC Regulator
Topology	Step-Up (Boost)
Number of Outputs	13
Voltage - Supply (Min)	3V
Voltage - Supply (Max)	5.5V
Voltage - Output	4V ~ 5.3V
Current - Output / Channel	900mA (Switch)
Frequency	2MHz
Dimming	PWM
Package / Case	36-WFBGA, DSBGA
Supplier Device Package	36-DSBGA (4.6x3.24)
Operating Temperature	-30°C ~ 85°C (TA)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the LP3954RL/NOPB are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Electrical Parameters (Must Match):

DC-DC regulator topology: Step-Up (Boost)
Number of outputs: 13
Supply voltage range: 3V to 5.5V
Output voltage range: 4V to 5.3V
Switch current: 900mA
Operating frequency: 2MHz
PWM dimming capability
Operating temperature range: -30°C to 85°C

Mechanical Parameters (Must Match):

Package type: 36-DSBGA
Mounting type: Surface Mount
Physical dimensions: 4.6x3.24mm

Compliance Parameters:

RoHS3 compliance
MSL rating: 1 (Unlimited)

The substitute parts LP3954TLX/NOPB and LP3954TL/NOPB maintain identical electrical and mechanical specifications while differing in packaging format and product status.

Parameter Comparison

Parameter	LP3954RL/NOPB	LP3954TLX/NOPB	LP3954TL/NOPB
Manufacturer	Texas Instruments	Texas Instruments	National Semiconductor
Base Product Number	LP3954	LP3954	LP3954
Product Status	Obsolete	Active	Active
Type	DC DC Regulator	DC DC Regulator	DC DC Regulator
Topology	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)
Number of Outputs	13	13	13
Voltage - Supply (Min)	3V	3V	3V
Voltage - Supply (Max)	5.5V	5.5V	5.5V
Voltage - Output	4V ~ 5.3V	4V ~ 5.3V	4V ~ 5.3V
Current - Output / Channel	900mA (Switch)	900mA (Switch)	900mA (Switch)
Frequency	2MHz	2MHz	2MHz
Dimming	PWM	PWM	PWM
Package / Case	36-WFBGA, DSBGA	36-WFBGA, DSBGA	36-WFBGA, DSBGA
Supplier Device Package	36-DSBGA (4.6x3.24)	36-DSBGA	36-DSBGA
Operating Temperature	-30°C ~ 85°C (TA)	-30°C ~ 85°C (TA)	-30°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified
MSL Rating	1 (Unlimited)	1 (Unlimited)	Not specified
Packaging Format	Bulk	Tape & Reel (TR)	Bulk
Inventory Status	750 Pcs New Original In Stock	2400 Pcs New Original In Stock	4188 Pcs New Original In Stock

Engineering Selection Recommendations

LP3954TLX/NOPB is the primary substitute for LP3954RL/NOPB. Both parts are manufactured by Texas Instruments with identical electrical and mechanical specifications. LP3954TLX/NOPB carries active product status and is available in Tape & Reel packaging format, providing superior availability and supply chain continuity compared to the obsolete LP3954RL/NOPB. ROHS3 compliance and MSL rating 1 are confirmed for this variant.

LP3954TL/NOPB is a parametric equivalent manufactured by National Semiconductor with identical electrical and mechanical performance. This part maintains active product status and offers the highest inventory availability. Compliance certifications (RoHS and MSL) are not specified in the provided data for this variant.

For new designs and ongoing production, LP3954TLX/NOPB is the recommended primary choice due to confirmed compliance documentation and Texas Instruments manufacturer continuity. LP3954TL/NOPB serves as a secondary option when supply constraints require alternative sourcing.

Frequently Asked Questions (FAQ)

Q: Can LP3954TLX/NOPB be used as a direct replacement for LP3954RL/NOPB?

A: Yes. Both parts share identical electrical specifications (13-output boost regulator, 3V-5.5V supply, 4V-5.3V output, 900mA switch current, 2MHz frequency, PWM dimming) and mechanical specifications (36-DSBGA package, 4.6x3.24mm, surface mount). The primary difference is packaging format (Tape & Reel vs. Bulk) and product status (Active vs. Obsolete).

Q: What is the difference between LP3954TLX/NOPB and LP3954TL/NOPB?

A: Both parts are parametric equivalents with identical electrical and mechanical specifications. The primary differences are manufacturer (Texas Instruments vs. National Semiconductor), packaging format (Tape & Reel vs. Bulk), and inventory availability. Compliance documentation (RoHS3, MSL) is confirmed for LP3954TLX/NOPB but not specified for LP3954TL/NOPB.

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel (TR) and Bulk packaging formats contain identical die and electrical characteristics. The packaging format affects only handling, storage, and supply chain logistics, not functional performance.

Q: Are all three parts RoHS3 compliant?

A: RoHS3 compliance is confirmed for LP3954RL/NOPB and LP3954TLX/NOPB. Compliance status for LP3954TL/NOPB is not specified in the provided data.

Q: What is the MSL rating and why does it matter?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture control requirements. This rating is confirmed for LP3954RL/NOPB and LP3954TLX/NOPB, simplifying storage and handling procedures.

Q: Can these parts be used in backlight and camera flash applications?

A: Yes. All three parts are specified for backlight and camera flash applications with identical performance characteristics across the -30°C to 85°C operating temperature range.

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