LP5996SD-3333 Equivalent & Substitute Parts

Part Overview

The LP5996SD-3333 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers positive fixed 3.3V output with dual output configuration, supporting 150mA and 300mA current levels in a 10-SON (3x3) surface mount package. The main part number LP5996SD-3333 is currently listed as obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Min/Fixed)	3.3V
Voltage - Input (Max)	6V
Number of Regulators	2
Current - Output	150mA, 300mA
Voltage Dropout (Max)	0.22V @ 150mA, 0.55V @ 300mA
Current - Quiescent (Iq)	110 µA
Operating Temperature	-40°C ~ 85°C
Package / Case	10-WFDFN Exposed Pad
Mounting Type	Surface Mount
Control Features	Enable
Protection Features	Over Temperature, Short Circuit
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the LP5996SD-3333 is determined by strict alignment of the following electrical and mechanical parameters:

Output voltage: 3.3V fixed
Dual regulator configuration (2 outputs)
Current capability: 150mA and 300mA per output
Maximum input voltage: 6V
Dropout voltage specifications: 0.22V @ 150mA, 0.55V @ 300mA
Package type: 10-WFDFN Exposed Pad (10-SON 3x3)
Surface mount configuration
Enable control feature
Over temperature and short circuit protection
Operating temperature range: -40°C ~ 85°C

Two substitute parts meet these criteria: LP3996SD-3333/NOPB (active status, RoHS3 compliant) and LP5996SD-3333/NOPB (active status, RoHS3 compliant). Both maintain electrical equivalence across all specified parameters.

Parameter Comparison

Parameter	LP5996SD-3333 (Main)	LP3996SD-3333/NOPB	LP5996SD-3333/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active
Output Configuration	Positive	Positive	Positive
Output Type	Fixed	Fixed	Fixed
Voltage - Output (Min/Fixed)	3.3V	3.3V	3.3V
Voltage - Input (Max)	6V	6V	6V
Number of Regulators	2	2	2
Current - Output	150mA, 300mA	150mA, 300mA	150mA, 300mA
Voltage Dropout (Max)	0.22V @ 150mA, 0.55V @ 300mA	0.22V @ 150mA, 0.55V @ 150mA	0.22V @ 150mA, 0.55V @ 300mA
Current - Quiescent (Iq)	110 µA	100 µA	110 µA
Current - Supply (Max)	170 µA	170 µA	170 µA
PSRR	58dB ~ 45dB, 70dB ~ 60dB (1kHz ~ 20kHz)	58dB ~ 45dB, 70dB ~ 60dB (1kHz ~ 20kHz)	58dB ~ 45dB, 70dB ~ 60dB (1kHz ~ 20kHz)
Control Features	Enable	Enable	Enable
Protection Features	Over Temperature, Short Circuit	Over Temperature, Short Circuit	Over Temperature, Short Circuit
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	10-WFDFN Exposed Pad	10-WFDFN Exposed Pad	10-WFDFN Exposed Pad
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both LP3996SD-3333/NOPB and LP5996SD-3333/NOPB are active, production-status alternatives to the obsolete LP5996SD-3333. Both substitute parts achieve full electrical and mechanical equivalence with the main part across all specified parameters.

The LP5996SD-3333/NOPB maintains identical quiescent current (110 µA) and dropout voltage specifications to the main part. The LP3996SD-3333/NOPB offers marginally lower quiescent current (100 µA) and differs in dropout voltage specification at 300mA (0.55V @ 150mA versus 0.55V @ 300mA on the main part).

Both substitute parts carry RoHS3 compliance, whereas the main part is RoHS non-compliant. Both are available in Tape & Reel packaging with unlimited moisture sensitivity rating. Selection between the two substitutes should be based on specific design requirements regarding quiescent current performance and dropout voltage characteristics at rated current levels.

Frequently Asked Questions (FAQ)

Q: Can LP3996SD-3333/NOPB and LP5996SD-3333/NOPB be used interchangeably with LP5996SD-3333?

A: Both substitute parts meet the electrical and mechanical specifications of the main part. The LP5996SD-3333/NOPB provides identical quiescent current and dropout voltage performance. The LP3996SD-3333/NOPB offers lower quiescent current but with a different dropout voltage specification at 300mA output. Selection depends on whether your design prioritizes quiescent current efficiency or specific dropout voltage performance at maximum current.

Q: What is the difference between the main part and the substitutes in terms of compliance?

A: The main part LP5996SD-3333 is RoHS non-compliant. Both substitute parts, LP3996SD-3333/NOPB and LP5996SD-3333/NOPB, are RoHS3 compliant. If your application requires RoHS compliance, either substitute part is suitable.

Q: Are the package dimensions identical across all three parts?

A: Yes. All three parts use the 10-WFDFN Exposed Pad package (10-SON 3x3) with surface mount configuration. PCB layout and footprint compatibility are maintained across the main part and both substitutes.

Q: What is the significance of the /NOPB suffix on the substitute parts?

A: The /NOPB suffix indicates the parts are supplied in Tape & Reel packaging without plumbum (lead-free). The main part does not specify this packaging designation.

Q: Can I use LP3996SD-3333/NOPB if my design requires the exact quiescent current of 110 µA?

A: No. The LP3996SD-3333/NOPB has a quiescent current of 100 µA, which differs from the main part specification of 110 µA. Use LP5996SD-3333/NOPB if your design requires matching the original quiescent current specification.

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