LP5900SD-2.7 Equivalent & Substitute Parts

Part Overview

The LP5900SD-2.7 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. This device delivers 150mA output current at a fixed 2.7V output with a maximum dropout voltage of 0.15V at full load. The part features integrated over-temperature and short-circuit protection, making it suitable for low-power supply applications requiring stable voltage regulation.

The main part number LP5900SD-2.7 carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications currently using this regulator.

Key Parameters

Parameter	Value
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Min/Fixed)	2.7V
Voltage - Input (Max)	5.5V
Current - Output	150mA
Voltage Dropout (Max)	0.15V @ 150mA
Current - Quiescent (Iq)	50 µA
Package / Case	6-WDFN Exposed Pad
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C
Control Features	Enable
Protection Features	Over Temperature, Short Circuit

Substitute Part Grouping Explanation

Substitute parts for the LP5900SD-2.7 are identified based on strict electrical and mechanical parameter matching within the LP5900 series. The substitution criteria are:

Output voltage: 2.7V fixed
Output current capability: 150mA
Maximum input voltage: 5.5V
Maximum dropout voltage: 0.15V @ 150mA
Package type: 6-WSON (2.2x2.5) / 6-WDFN Exposed Pad
Surface mount configuration
Enable control feature
Over-temperature and short-circuit protection

Substitute parts must maintain identical electrical specifications and package footprint compatibility. Packaging format (Tape & Reel versus bulk) does not affect electrical or mechanical substitutability.

Parameter Comparison

Parameter	LP5900SD-2.7	LP5900SD-2.7/NOPB	LP5900SDX-2.7/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Output Configuration	Positive	Positive	Positive
Output Type	Fixed	Fixed	Fixed
Voltage - Output (Min/Fixed)	2.7V	2.7V	2.7V
Voltage - Input (Max)	5.5V	5.5V	5.5V
Current - Output	150mA	150mA	150mA
Voltage Dropout (Max)	0.15V @ 150mA	0.15V @ 150mA	0.15V @ 150mA
Current - Quiescent (Iq)	50 µA	50 µA	50 µA
Current - Supply (Max)	230 µA	230 µA	230 µA
PSRR	85dB ~ 40dB (100Hz ~ 100kHz)	85dB ~ 40dB (100Hz ~ 100kHz)	85dB ~ 40dB (100Hz ~ 100kHz)
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	6-WDFN Exposed Pad	6-WDFN Exposed Pad	6-WDFN Exposed Pad
Supplier Device Package	6-WSON (2.2x2.5)	6-WSON (2.2x2.5)	6-WSON (2.2x2.5)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
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 LP5900SD-2.7/NOPB and LP5900SDX-2.7/NOPB are direct substitutes for the obsolete LP5900SD-2.7. All three parts share identical electrical specifications and package configurations.

The primary differentiators are product status and regulatory compliance:

LP5900SD-2.7/NOPB carries Active product status and ROHS3 compliance, making it the preferred choice for new designs and ongoing production where regulatory requirements must be met.

LP5900SDX-2.7/NOPB also carries Active product status and ROHS3 compliance, with higher inventory availability (3718 Pcs versus 2000 Pcs for LP5900SD-2.7/NOPB).

Both substitute parts are electrically and mechanically interchangeable with the obsolete main part number. Selection between the two substitutes should be based on supply chain availability and inventory requirements.

Frequently Asked Questions (FAQ)

Q: Can LP5900SD-2.7/NOPB and LP5900SDX-2.7/NOPB be used interchangeably with LP5900SD-2.7?

A: Yes. All three part numbers share identical electrical specifications, output voltage (2.7V fixed), output current (150mA), dropout voltage (0.15V @ 150mA), and package configuration (6-WSON 2.2x2.5). They are direct substitutes at the circuit level.

Q: What is the difference between LP5900SD-2.7/NOPB and LP5900SDX-2.7/NOPB?

A: Both parts are electrically identical and carry Active product status with ROHS3 compliance. The primary difference is inventory availability. LP5900SDX-2.7/NOPB has higher stock levels (3718 Pcs) compared to LP5900SD-2.7/NOPB (2000 Pcs).

Q: Why is the original LP5900SD-2.7 marked as Obsolete?

A: The original part carries Obsolete status, indicating it is no longer in active production. The substitute parts LP5900SD-2.7/NOPB and LP5900SDX-2.7/NOPB maintain Active status and are the recommended alternatives for continued supply.

Q: Are there any compliance differences between the main part and substitutes?

A: Yes. The original LP5900SD-2.7 is RoHS non-compliant. Both substitute parts (LP5900SD-2.7/NOPB and LP5900SDX-2.7/NOPB) are ROHS3 compliant. For applications requiring regulatory compliance, the substitute parts are required.

Q: Does packaging format affect substitutability?

A: No. The substitute parts are supplied in Tape & Reel (TR) packaging format, while the original part does not specify packaging format. This difference affects supply chain handling and storage but does not impact electrical or mechanical compatibility. The physical component and footprint remain identical.

Q: What are the key parameters that determine substitutability for this regulator?

A: Substitutability is determined by: fixed output voltage (2.7V), output current capability (150mA), maximum input voltage (5.5V), maximum dropout voltage (0.15V @ 150mA), package type (6-WSON 2.2x2.5), surface mount configuration, and protection features (over-temperature and short-circuit). All three parts match these criteria exactly.

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