LM1117MPX-5.0 Equivalent & Substitute Parts

Part Overview

The LM1117MPX-5.0 is a linear voltage regulator IC manufactured by Texas Instruments, classified as a Power Management (PMIC) component. This device provides a fixed positive 5V output with 800mA current capacity in a SOT-223-4 surface mount package. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The LM1117MPX-5.0 delivers regulated 5V output from input voltages up to 15V with integrated over-current and over-temperature protection. Its low dropout voltage of 1.2V at 800mA and quiescent current of 5mA make it suitable for battery-powered and low-power applications requiring stable 5V regulation.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	5V
Output Current	800mA
Input Voltage (Max)	15V
Dropout Voltage (Max)	1.2V @ 800mA
Quiescent Current (Iq)	5mA
PSRR	75dB (120Hz)
Protection Features	Over Current, Over Temperature
Operating Temperature	0°C ~ 125°C
Package Type	SOT-223-4
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the LM1117MPX-5.0 is determined by the following critical parameters:

Primary Substitution Criteria:

Fixed output voltage of 5V
Output current capability of 800mA or greater
Maximum input voltage of 15V or higher
Dropout voltage not exceeding 1.2V at rated current
Surface mount SOT-223 package family (SOT-223-3 or SOT-223-4)
Over-current and over-temperature protection
Operating temperature range including 0°C to 125°C minimum

Substitution Categories:

Category 1: Direct Parametric Equivalents (Texas Instruments) Parts LM1117MP-5.0/NOPB and LM1117MPX-5.0/NOPB match all electrical specifications and package requirements. These parts are active products with identical output current, dropout voltage, and protection features. The primary difference is product status (active vs. obsolete).

Category 2: Enhanced Equivalents (Texas Instruments TLV1117 Series) Parts TLV1117-50CDCYR and TLV1117-50CDCYRG3 provide identical electrical performance with slightly higher dropout voltage (1.3V vs. 1.2V) and increased quiescent current (10mA vs. 5mA). These represent functional equivalents with acceptable parameter variations for most applications.

Category 3: Higher Current Alternatives (Diodes Incorporated AZ1117 Series) Parts AZ1117CH-5.0TRG1, AZ1117H-5.0TRE1, and AZ1117H-5.0TRG1 provide 1A output current capability, exceeding the 800mA requirement. Dropout voltage ranges from 1.25V to 1.3V. These parts offer enhanced current headroom for demanding applications.

Category 4: Cross-Manufacturer Equivalents Parts LD1117S50CTR (STMicroelectronics) and LT1117CST-5#PBF / LT1117CST-5#TRPBF (Analog Devices Inc.) provide equivalent 800mA output with matching 5V regulation and SOT-223 packaging. These represent established alternatives from different manufacturers.

Parameter Comparison

Part Number	Manufacturer	Output Current	Dropout Voltage (Max)	Quiescent Current	Package	Product Status	Operating Temp
LM1117MPX-5.0	Texas Instruments	800mA	1.2V @ 800mA	5mA	SOT-223-4	Obsolete	0°C ~ 125°C
LM1117MP-5.0/NOPB	Texas Instruments	800mA	1.2V @ 800mA	5mA	SOT-223	Active	0°C ~ 125°C
LM1117MPX-5.0/NOPB	Texas Instruments	800mA	1.2V @ 800mA	5mA	SOT-223-4	Active	0°C ~ 125°C
TLV1117-50CDCYR	Texas Instruments	800mA	1.3V @ 800mA	10mA	SOT-223-4	Active	0°C ~ 125°C
TLV1117-50CDCYRG3	Texas Instruments	800mA	1.3V @ 800mA	10mA	SOT-223-4	Active	0°C ~ 125°C
AZ1117CH-5.0TRG1	Diodes Incorporated	1A	1.3V @ 800mA	6mA	SOT-223-3	Active	-20°C ~ 125°C
AZ1117H-5.0TRE1	Diodes Incorporated	1A	1.25V @ 1A	10mA	SOT-223-3	Active	-40°C ~ 125°C
AZ1117H-5.0TRG1	Diodes Incorporated	1A	1.25V @ 1A	10mA	SOT-223-3	Active	-40°C ~ 125°C
LD1117S50CTR	STMicroelectronics	800mA	1.3V @ 800mA	10mA	SOT-223	Active	-40°C ~ 125°C
LT1117CST-5#PBF	Analog Devices Inc.	800mA	1.2V @ 800mA	10mA	SOT-223-3	Active	0°C ~ 125°C
LT1117CST-5#TRPBF	Analog Devices Inc.	800mA	1.2V @ 800mA	10mA	SOT-223-3	Active	0°C ~ 125°C

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

Select LM1117MPX-5.0/NOPB when exact parametric matching is required. This part maintains the original 1.2V dropout voltage and 5mA quiescent current while offering active product status and full availability. The SOT-223-4 package matches the original pinout configuration.

Alternatively, LM1117MP-5.0/NOPB provides identical electrical performance with SOT-223 packaging. Both parts are Texas Instruments products with ROHS3 compliance and unlimited moisture sensitivity rating.

For Active Product Continuity with Minor Parameter Variance:

TLV1117-50CDCYR and TLV1117-50CDCYRG3 are recommended when slight increases in dropout voltage (1.3V vs. 1.2V) and quiescent current (10mA vs. 5mA) are acceptable. These parts offer superior inventory availability and active product status. Both maintain ROHS3 compliance and SOT-223-4 packaging.

For Enhanced Current Capability:

AZ1117H-5.0TRE1 and AZ1117H-5.0TRG1 (Diodes Incorporated) provide 1A output current with dropout voltage of 1.25V at rated current. These parts extend the operating temperature range to -40°C and offer increased design margin for current-limited applications. MSL rating of 1 (Unlimited) matches the original part.

LD1117S50CTR (STMicroelectronics) maintains 800mA output with extended operating temperature range (-40°C to 125°C) and ROHS3 compliance. This part provides cross-manufacturer redundancy with established supply chain presence.

For Analog Devices Integration:

LT1117CST-5#PBF and LT1117CST-5#TRPBF maintain the original 1.2V dropout voltage specification with 800mA output. These parts are suitable for designs requiring Analog Devices component qualification or supply chain diversification.

All recommended substitutes maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification matching the original part.

Frequently Asked Questions (FAQ)

Q: Can LM1117MP-5.0/NOPB directly replace LM1117MPX-5.0?

A: Yes. Both parts are Texas Instruments products with identical electrical specifications: 5V fixed output, 800mA current, 1.2V dropout voltage, and 5mA quiescent current. The primary difference is packaging designation (SOT-223 vs. SOT-223-4). Both use the same physical SOT-223 case with identical pinout. LM1117MP-5.0/NOPB is the active product variant.

Q: What is the difference between TLV1117 and LM1117 series?

A: The TLV1117 series represents an enhanced product line with identical output voltage and current specifications. Key differences include dropout voltage of 1.3V (vs. 1.2V) and quiescent current of 10mA (vs. 5mA). These variations are acceptable in most applications and do not affect functional compatibility. TLV1117 parts offer superior availability as active products.

Q: Are AZ1117 parts suitable for 800mA applications?

A: Yes. AZ1117 series parts are rated for 1A output current, providing 200mA additional headroom above the 800mA requirement. Dropout voltage at 800mA is 1.25V to 1.3V, meeting or exceeding the original specification. These parts are recommended for applications requiring design margin or future current expansion.

Q: What is the significance of SOT-223-3 vs. SOT-223-4 packaging?

A: Both packages use the same physical SOT-223 case. The "-3" designation indicates three functional pins (input, output, ground), while "-4" includes an additional ground pin for enhanced thermal performance. Devices with SOT-223-3 packaging are electrically compatible with SOT-223-4 footprints when the fourth pin is left unconnected or tied to ground.

Q: Can I use LD1117S50CTR as a substitute?

A: Yes. LD1117S50CTR (STMicroelectronics) provides 800mA output with 1.3V dropout voltage and extended operating temperature range (-40°C to 125°C). This part is suitable for applications requiring cross-manufacturer qualification or supply chain diversification. SOT-223 packaging is compatible with the original footprint.

Q: Which substitute offers the lowest quiescent current?

A: LM1117MP-5.0/NOPB and LM1117MPX-5.0/NOPB maintain the original 5mA quiescent current specification. All other substitutes have 6mA or higher quiescent current. For battery-powered applications prioritizing standby current minimization, these Texas Instruments variants are preferred.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original LM1117MPX-5.0 regulatory classification. All parts carry EAR99 export classification.

Q: What is the MSL (Moisture Sensitivity Level) difference?

A: LM1117MPX-5.0, LM1117MP-5.0/NOPB, LM1117MPX-5.0/NOPB, and all Analog Devices LT1117 variants have MSL 1 (Unlimited). TLV1117 series parts have MSL 2 (1 Year). AZ1117CH-5.0TRG1 has MSL 3 (168 Hours). For standard manufacturing environments, MSL differences do not impact component selection. MSL 1 parts offer maximum shelf life flexibility.

Q: Which substitute has the widest operating temperature range?

A: AZ1117H-5.0TRE1 and AZ1117H-5.0TRG1 extend the operating range to -40°C to 125°C, compared to the original 0°C to 125°C. LD1117S50CTR also provides -40°C to 125°C operation. These parts are suitable for industrial and automotive temperature environments.

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