SP7805V2-L/TR Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The SP7805V2-L/TR is a linear voltage regulator IC manufactured by MaxLinear, Inc., designed to provide a fixed positive 5V output at 1A current capacity in a TO-252-3 surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The SP7805V2-L/TR operates across an industrial temperature range of -40°C to 125°C and includes protection features for over-temperature and short-circuit conditions.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	5V
Output Current	1A
Input Voltage (Max)	18V
Voltage Dropout (Max)	2V @ 1A (Typ)
Quiescent Current	6 mA
PSRR	73dB (120Hz)
Operating Temperature	-40°C ~ 125°C
Package	TO-252-3 (DPAK)
Protection Features	Over Temperature, Short Circuit

Substitute Part Grouping Explanation

Substitution for the SP7805V2-L/TR is determined by the following critical parameters: fixed 5V output voltage, TO-252-3 package compatibility, positive output configuration, surface mount mounting type, and operating temperature range of -40°C to 125°C. Substitute parts must maintain these core electrical and mechanical specifications to ensure direct replacement capability.

The substitute parts are grouped into two categories based on output current capacity:

Full-Current Substitutes (1A Output): Parts capable of delivering the full 1A output current specified for the original part.

Reduced-Current Substitutes (250mA–500mA Output): Parts with lower output current ratings suitable for applications requiring less than 1A, provided the load current does not exceed the substitute part's maximum rating.

All substitute parts listed maintain the same 5V fixed output voltage, TO-252-3 package format, positive output configuration, and industrial temperature range. Differences in input voltage maximum ratings, dropout voltage characteristics, and quiescent current are secondary parameters that do not prevent substitution when load requirements are met.

Parameter Comparison

Part Number	Manufacturer	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Quiescent Current	PSRR	Product Status	Package
SP7805V2-L/TR	MaxLinear, Inc.	1A	18V	2V @ 1A	6 mA	73dB (120Hz)	Obsolete	TO-252-3
AS7805ADTR-G1	Diodes Incorporated	1A	25V	2V @ 1A	6 mA	70dB (120Hz)	Active	TO-252-3
IFX25001TFV50ATMA1	Infineon Technologies	400mA	40V	0.5V @ 250mA	220 µA	60dB (100Hz)	Obsolete	TO-252-3
KF50BDT-TR	STMicroelectronics	500mA	20V	0.7V @ 500mA	1 mA	76dB ~ 60dB (120Hz ~ 10kHz)	Active	TO-252-3
L4931ABDT50-TR	STMicroelectronics	250mA	20V	0.8V @ 250mA	1 mA	70dB ~ 55dB (120Hz ~ 10kHz)	Active	TO-252-3
L4931CDT50-TR	STMicroelectronics	250mA	20V	0.8V @ 250mA	1 mA	70dB ~ 55dB (120Hz ~ 10kHz)	Active	TO-252-3
TLE42744DV50ATMA1	Infineon Technologies	400mA	40V	0.5V @ 250mA	220 µA	60dB (100Hz)	Active	TO-252-3
TLE72742DATMA1	Infineon Technologies	300mA	42V	0.5V @ 200mA	30 µA	60dB (100Hz)	Active	TO-252-3

Engineering Selection Recommendations

Primary Substitute (Direct 1A Replacement): AS7805ADTR-G1 from Diodes Incorporated is the recommended direct substitute for the SP7805V2-L/TR. This part maintains identical output current (1A), fixed 5V output voltage, TO-252-3 package format, and operating temperature range. The AS7805ADTR-G1 is currently in active product status with 52,900 units in stock, ensuring long-term availability. It carries ROHS3 compliance and is suitable for immediate design integration.

Secondary Substitutes (Reduced-Current Applications): For applications where load current does not exceed 500mA, the KF50BDT-TR from STMicroelectronics provides an active, readily available alternative with superior PSRR performance (76dB at 120Hz) and lower quiescent current (1 mA). This part is actively manufactured with 8,550 units in inventory.

For applications limited to 300mA or less, the TLE72742DATMA1 from Infineon Technologies offers automotive-grade qualification (AEC-Q100) with the lowest quiescent current (30 µA) among all substitutes, making it suitable for battery-powered or low-power applications. This part is actively produced with 25,428 units available.

For applications requiring 250mA maximum output, both L4931ABDT50-TR and L4931CDT50-TR from STMicroelectronics are active alternatives with identical electrical characteristics and unlimited moisture sensitivity rating (MSL 1).

Obsolete Part Considerations: IFX25001TFV50ATMA1 from Infineon Technologies, though listed as an original substitute, is classified as obsolete. This part should be avoided for new designs despite its 3,729-unit inventory, as future availability cannot be guaranteed.

Frequently Asked Questions (FAQ)

Q: Can AS7805ADTR-G1 directly replace SP7805V2-L/TR without circuit modifications? A: Yes. Both parts provide identical 5V fixed output, 1A maximum current, TO-252-3 package, and -40°C to 125°C operating range. The AS7805ADTR-G1 accepts higher input voltage (25V vs. 18V maximum), making it a pin-compatible, drop-in replacement.

Q: What is the difference between the 1A and reduced-current substitutes? A: The AS7805ADTR-G1 maintains the full 1A output current specification. Reduced-current substitutes (KF50BDT-TR at 500mA, TLE72742DATMA1 at 300mA, L4931 series at 250mA) are suitable only when circuit load current does not exceed their respective maximum ratings. Exceeding these limits will cause thermal shutdown or performance degradation.

Q: Are all substitute parts RoHS compliant? A: Yes. All listed substitute parts carry ROHS3 compliance certification, meeting environmental and hazardous substance restrictions for commercial and industrial applications.

Q: What is the significance of the TO-252-3 package specification? A: The TO-252-3 package (also designated DPAK with 2 leads plus tab) is a surface mount format with identical pin configuration and thermal characteristics across all listed parts. This ensures mechanical and electrical compatibility without PCB redesign.

Q: Why do some substitutes have lower quiescent current than the original part? A: Quiescent current (Iq) represents the regulator's internal power consumption when no load is connected. Lower Iq values (such as 30 µA in TLE72742DATMA1 versus 6 mA in SP7805V2-L/TR) indicate more efficient internal design and are beneficial for battery-powered or standby applications. This difference does not affect substitution compatibility.

Q: Can I use TLE42744DV50ATMA1 or TLE72742DATMA1 in automotive applications? A: TLE42744DV50ATMA1 and TLE72742DATMA1 both carry AEC-Q100 automotive qualification and are rated for -40°C to 150°C operating temperature, exceeding the original part's -40°C to 125°C range. These parts are suitable for automotive-grade applications where such qualification is required.

Q: What is PSRR and why does it vary among substitutes? A: Power Supply Rejection Ratio (PSRR) measures the regulator's ability to reject input voltage ripple and noise. Higher PSRR values indicate better noise rejection. The original SP7805V2-L/TR specifies 73dB at 120Hz. Substitutes with lower PSRR (such as 60dB) are still suitable for most applications but may require additional input filtering in noise-sensitive circuits.

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