LP5907MFX-2.7/NOPB Equivalent & Substitute Parts

Part Overview

The LP5907MFX-2.7/NOPB is a linear voltage regulator IC from Texas Instruments, classified as a positive fixed output PMIC in SOT-23-5 surface mount packaging. This device delivers 250mA output current at a fixed 2.7V output voltage with a maximum dropout voltage of 0.25V at full load. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	LP5907MFX-2.7/NOPB
Manufacturer	Texas Instruments
Output Voltage (Fixed)	2.7V
Output Current	250mA
Input Voltage (Max)	5.5V
Dropout Voltage (Max)	0.25V @ 250mA
Quiescent Current	25 µA
Package	SOT-23-5 (SC-74A)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LP5907MFX-2.7/NOPB are selected based on the following critical parameters:

Fixed output voltage of 2.7V
SOT-23-5 surface mount package compatibility
Positive output configuration with Enable control feature
Maximum input voltage of 5.5V
Operating temperature range of -40°C to 85°C or wider
ROHS3 compliance and EAR99 classification

Substitutes are grouped by output current capability. The original part specifies 250mA output current. ABLIC Inc. S-series regulators provide direct alternatives with equivalent or superior electrical characteristics across three current ratings: 150mA (S-1312 series), 200mA (S-1313 series), and 300mA (S-1135 series). All substitute parts maintain the same fixed 2.7V output voltage, identical package format, and equivalent control/protection features.

Parameter Comparison

Parameter	LP5907MFX-2.7/NOPB	S-1135A27-M5T1U	S-1312B27-M5T1U3	S-1313B27-M5T1U3	S-1315A27-M5T1U3
Manufacturer	Texas Instruments	ABLIC Inc.	ABLIC Inc.	ABLIC Inc.	ABLIC Inc.
Output Voltage	2.7V	2.7V	2.7V	2.7V	2.7V
Output Current	250mA	300mA	150mA	200mA	200mA
Input Voltage (Max)	5.5V	5.5V	5.5V	5.5V	5.5V
Dropout Voltage (Max)	0.25V @ 250mA	—	0.32V @ 100mA	0.38V @ 100mA	0.28V @ 200mA
Quiescent Current	25 µA	1 µA	30 µA	1.35 µA	1 µA
Package	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5
Operating Temperature	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Product Status	Obsolete	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For applications requiring 250mA output current, the S-1135A27-M5T1U (300mA) provides the closest current capability match and maintains active product status. This part delivers superior quiescent current performance (1 µA vs. 25 µA) while supporting the full 5.5V input range and fixed 2.7V output specification.

For applications with reduced current requirements below 250mA, the S-1313B27-M5T1U3 (200mA) or S-1315A27-M5T1U3 (200mA) are suitable alternatives. Both are active products with ROHS3 compliance. The S-1315A27-M5T1U3 offers lower dropout voltage (0.28V @ 200mA) compared to S-1313B27-M5T1U3 (0.38V @ 100mA), making it preferable for low-headroom applications.

The S-1312B27-M5T1U3 (150mA) is appropriate only for designs with maximum current draw not exceeding 150mA. All substitute parts maintain identical SOT-23-5 packaging, Enable control functionality, and thermal shutdown protection, ensuring direct PCB compatibility.

Frequently Asked Questions (FAQ)

Q: Can S-1135A27-M5T1U directly replace LP5907MFX-2.7/NOPB in existing designs?

A: Yes. Both parts share identical fixed 2.7V output voltage, SOT-23-5 package format, 5.5V maximum input voltage, and Enable control feature. The S-1135A27-M5T1U provides 300mA output current, exceeding the original 250mA specification. Pin-to-pin compatibility is maintained.

Q: What is the impact of reduced output current in S-1312 and S-1313 series substitutes?

A: These parts are suitable only if circuit load current does not exceed their rated output: S-1312 series at 150mA maximum and S-1313 series at 200mA maximum. Exceeding rated current will trigger overcurrent protection and thermal shutdown.

Q: Are there operating temperature limitations with ABLIC substitutes?

A: ABLIC S-series regulators operate from -40°C to 85°C, compared to the original LP5907MFX-2.7/NOPB range of -40°C to 125°C. Applications requiring operation above 85°C require design review.

Q: Do all substitute parts maintain ROHS3 compliance?

A: Yes. All listed substitute parts are ROHS3 compliant with EAR99 classification, matching the original part's regulatory status.

Q: What is the significance of quiescent current differences?

A: ABLIC substitutes exhibit significantly lower quiescent current (1 to 1.35 µA) compared to the original 25 µA. This reduces standby power consumption, providing a performance advantage in battery-powered applications.

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