TPS70458PWPRG4 Equivalent & Substitute Parts

Part Overview

The TPS70458PWPRG4 is a linear voltage regulator IC from Texas Instruments designed for positive fixed dual-output power management applications. This device provides two independent regulated outputs at 3.3V and 2.5V with output currents of 1A and 2A respectively, integrated into a 24-HTSSOP surface mount package. The part is currently discontinued at DiGi Electronics, making identification of equivalent substitute parts essential for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Base Product Number	TPS70458
Output Configuration	Positive
Number of Regulators	2
Voltage - Output (Min/Fixed)	3.3V, 2.5V
Current - Output	1A, 2A
Voltage - Input (Max)	6V
Voltage Dropout (Max)	0.25V @ 1A
Current - Quiescent (Iq)	250 µA
PSRR	65dB (1kHz), 60dB (1kHz)
Control Features	Enable, Power Good, Reset, Sequencing
Protection Features	Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
Operating Temperature	-40°C ~ 125°C
Package / Case	24-PowerTSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)

Substitute Part Grouping Explanation

Substitution of the TPS70458PWPRG4 is determined by strict equivalence across the following critical parameters:

Base product number (TPS70458 series)
Dual-output positive fixed voltage regulation topology
Output voltage levels: 3.3V and 2.5V
Output current ratings: 1A and 2A
Maximum input voltage: 6V
Dropout voltage specification: 0.25V @ 1A
Quiescent current: 250 µA
Control and protection feature set
Operating temperature range: -40°C ~ 125°C
Package type: 24-PowerTSSOP surface mount

The primary difference between the main part and its substitute relates to packaging configuration (tube versus tape & reel) and product status (discontinued versus active). These variations do not affect electrical or mechanical compatibility.

Parameter Comparison

Parameter	TPS70458PWPRG4	TPS70458PWPR
Manufacturer	Texas Instruments	Texas Instruments
Base Product Number	TPS70458	TPS70458
Output Configuration	Positive	Positive
Number of Regulators	2	2
Voltage - Output (Min/Fixed)	3.3V, 2.5V	3.3V, 2.5V
Current - Output	1A, 2A	1A, 2A
Voltage - Input (Max)	6V	6V
Voltage Dropout (Max)	0.25V @ 1A	0.25V @ 1A
Current - Quiescent (Iq)	250 µA	250 µA
PSRR	65dB (1kHz), 60dB (1kHz)	65dB (1kHz), 60dB (1kHz)
Control Features	Enable, Power Good, Reset, Sequencing	Enable, Power Good, Reset, Sequencing
Protection Features	Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)	Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	24-PowerTSSOP (0.173", 4.40mm Width)	24-PowerTSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount	Surface Mount
Packaging Configuration	Tube	Tape & Reel (TR)
Product Status	Discontinued at DiGi Electronics	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)	2 (1 Year)

Engineering Selection Recommendations

The TPS70458PWPR serves as the direct substitute for the TPS70458PWPRG4. Both parts are manufactured by Texas Instruments and share identical electrical specifications, control features, and protection mechanisms. The substitute part maintains full compatibility with existing PCB designs and assembly processes.

The key distinction is product status: the TPS70458PWPRG4 is discontinued at DiGi Electronics, while the TPS70458PWPR remains in active production. For new procurement and long-term supply chain continuity, the TPS70458PWPR is the appropriate selection. Both parts comply with ROHS3 standards and carry identical moisture sensitivity ratings.

The packaging difference (tube versus tape & reel) affects only procurement and handling logistics, not electrical or mechanical performance. Selection between these configurations depends on production volume and assembly equipment compatibility.

Frequently Asked Questions (FAQ)

Q: Are TPS70458PWPRG4 and TPS70458PWPR electrically identical?

A: Yes. Both parts share the same base product number (TPS70458), output voltage levels (3.3V and 2.5V), current ratings (1A and 2A), dropout voltage (0.25V @ 1A), quiescent current (250 µA), control features, and protection mechanisms. They are electrically equivalent.

Q: What is the difference between these two part numbers?

A: The primary differences are packaging configuration and product status. The TPS70458PWPRG4 is supplied in tube packaging and is discontinued at DiGi Electronics. The TPS70458PWPR is supplied in tape & reel (TR) packaging and remains in active production.

Q: Can I use TPS70458PWPR as a direct replacement for TPS70458PWPRG4 on my PCB?

A: Yes. Both parts use the identical 24-PowerTSSOP surface mount package with the same pinout, dimensions (0.173" × 4.40mm width), and electrical characteristics. No PCB redesign is required.

Q: Which part should I specify for new designs?

A: Specify TPS70458PWPR for new designs. This part is in active production status, ensuring better long-term availability and supply chain support compared to the discontinued TPS70458PWPRG4.

Q: Does packaging configuration affect performance?

A: No. Tube and tape & reel packaging configurations do not affect electrical performance, thermal characteristics, or reliability. The choice between them depends on production volume, assembly equipment, and procurement preferences.

Q: Are both parts RoHS compliant?

A: Yes. Both TPS70458PWPRG4 and TPS70458PWPR are ROHS3 compliant with identical moisture sensitivity levels (MSL 2, 1 Year).

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