L88MS05TLL-TL-E Equivalent & Substitute Parts

Part Overview

The L88MS05TLL-TL-E is a linear voltage regulator IC manufactured by onsemi, delivering a fixed 5V output at 500mA. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The regulator features positive output configuration with integrated over-temperature and short-circuit protection, operating across a -20°C to 85°C temperature range with a maximum input voltage of 17V and dropout voltage of 0.3V at 150mA.

Key Parameters

Parameter	L88MS05TLL-TL-E
Manufacturer	onsemi
Output Voltage (Fixed)	5V
Output Current	500mA
Input Voltage (Max)	17V
Dropout Voltage (Max)	0.3V @ 150mA
Quiescent Current	5 mA
PSRR	74dB (120Hz)
Protection Features	Over Temperature, Short Circuit
Operating Temperature	-20°C ~ 85°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the L88MS05TLL-TL-E are qualified based on the following critical parameters:

Fixed output voltage of 5V
Output current capability of 500mA minimum
Positive output configuration
Single regulator topology
Over-temperature protection as minimum protection requirement
ROHS3 compliance and REACH unaffected status
Input voltage tolerance sufficient for the application

The three substitute parts listed below meet these core electrical and compliance criteria. Variations in input voltage rating, dropout voltage, quiescent current, and mounting type are acceptable within the scope of linear regulator substitution, provided the substitute maintains or exceeds the specified output current and protection features.

Parameter Comparison

Parameter	L88MS05TLL-TL-E (onsemi)	BA178M05CP-E2 (Rohm)	BA78M05CP-E2 (Rohm)	LM341T-5.0/NOPB (TI)
Output Voltage	5V	5V	5V	5V
Output Current	500mA	500mA	500mA	500mA
Input Voltage (Max)	17V	25V	25V	35V
Dropout Voltage (Max)	0.3V @ 150mA	2V @ 500mA (Typ)	2V @ 500mA (Typ)	Not specified
Quiescent Current	5 mA	4.5 mA	6 mA	4 mA
PSRR	74dB (120Hz)	78dB (120Hz)	78dB (120Hz)	78dB (120Hz)
Protection Features	Over Temperature, Short Circuit	None listed	Over Current, Over Temperature	Over Current, Over Temperature, Short Circuit
Operating Temperature	-20°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All three substitute parts are active products with ROHS3 compliance and REACH unaffected status, providing long-term availability and regulatory alignment compared to the obsolete L88MS05TLL-TL-E.

BA178M05CP-E2 and BA78M05CP-E2 are functionally equivalent Rohm Semiconductor devices with identical electrical specifications. Both support higher input voltage (25V) than the original part and maintain 500mA output current. BA178M05CP-E2 is supplied in Tape & Reel packaging, while BA78M05CP-E2 is supplied in Cut Tape. The BA78M05CP-E2 variant includes over-current protection in addition to over-temperature protection.

LM341T-5.0/NOPB from Texas Instruments offers the highest input voltage rating (35V) and extended operating temperature range (-40°C to 125°C). This device includes comprehensive protection features: over-current, over-temperature, and short-circuit protection. The LM341T-5.0/NOPB is supplied in Tube packaging.

Selection should be based on packaging requirements, input voltage headroom needed for the application, and desired operating temperature range. All three parts maintain the 5V fixed output and 500mA current capability required for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can BA178M05CP-E2 and BA78M05CP-E2 be used interchangeably?

A: Yes. Both are Rohm Semiconductor 5V 500mA linear regulators with identical electrical specifications. The difference is packaging: BA178M05CP-E2 is supplied in Tape & Reel format, while BA78M05CP-E2 is supplied in Cut Tape. Selection depends on your procurement and assembly process requirements.

Q: What is the primary difference between the Rohm parts and the Texas Instruments LM341T-5.0/NOPB?

A: The LM341T-5.0/NOPB supports higher input voltage (35V vs. 25V) and extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C). The LM341T also includes over-current protection alongside over-temperature and short-circuit protection. Choose the LM341T if your application requires higher input voltage tolerance or wider temperature operation.

Q: Is the dropout voltage difference significant for substitution?

A: The L88MS05TLL-TL-E specifies 0.3V dropout at 150mA, while the substitute parts specify 2V dropout at 500mA. If your application operates at full 500mA output current with minimal input voltage headroom, verify that the higher dropout voltage of the substitute parts is acceptable for your power supply design.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: What mounting considerations apply to these substitutes?

A: The L88MS05TLL-TL-E package type is not specified in the available data. The substitute parts use standard through-hole TO-220-3 or TO-220CP-3 packages. Verify that your PCB layout and thermal management design accommodate the through-hole mounting style of the substitute parts.

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