TL431IPG Equivalent & Substitute Parts

Part Overview

The TL431IPG is a shunt voltage reference IC manufactured by onsemi, designed for adjustable precision voltage regulation applications. This component features an adjustable output range from 2.495V to 36V with ±2.2% tolerance and supports output currents up to 100 mA. The TL431IPG is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts within the TL431 family maintain core electrical functionality while offering variations in tolerance specifications and operating temperature ranges.

Key Parameters

Parameter	Value
Manufacturer	onsemi
Part Number	TL431IPG
Category	Power Management (PMIC)
Reference Type	Shunt
Output Type	Adjustable
Voltage Output (Min/Fixed)	2.495V
Voltage Output (Max)	36V
Current Output	100 mA
Tolerance	±2.2%
Temperature Coefficient	50 ppm/°C Typical
Current Cathode	1 mA
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution within the TL431 family is determined by three critical parameters: output voltage range, output current capacity, and tolerance specification. All substitute parts listed maintain identical voltage output specifications (2.495V to 36V) and current output (100 mA), ensuring functional compatibility in voltage regulation circuits. The primary differentiator among substitutes is tolerance grade, which ranges from ±2.2% to ±0.4%, and operating temperature range, which varies between 0°C ~ 70°C and -40°C ~ 85°C. Package configuration remains constant across all substitutes at 8-DIP through-hole mounting. Selection of substitute parts depends on application requirements for tolerance precision and temperature operating range.

Parameter Comparison

Part Number	Manufacturer	Tolerance	Operating Temperature	Product Status	Voltage Output (Min/Fixed)	Voltage Output (Max)	Current Output	Package
TL431IPG	onsemi	±2.2%	-40°C ~ 85°C	Obsolete	2.495V	36V	100 mA	8-DIP
TL431IP	onsemi	±2.2%	-40°C ~ 85°C	Obsolete	2.495V	36V	100 mA	8-DIP
TL431ACP	onsemi	±1%	0°C ~ 70°C	Obsolete	2.495V	36V	100 mA	8-DIP
TL431AIP	onsemi	±1%	-40°C ~ 85°C	Obsolete	2.495V	36V	100 mA	8-DIP
TL431BCP	onsemi	±0.4%	0°C ~ 70°C	Obsolete	2.495V	36V	100 mA	8-DIP
TL431BIP	onsemi	±0.4%	-40°C ~ 85°C	Obsolete	2.495V	36V	100 mA	8-DIP
TL431CP	Texas Instruments	±2.2%	0°C ~ 70°C	Active	2.495V	36V	100 mA	8-DIP

Engineering Selection Recommendations

For applications requiring direct replacement of the TL431IPG with identical tolerance and extended temperature range, the TL431IP (onsemi) provides equivalent electrical performance. Both parts maintain ±2.2% tolerance and operate across -40°C ~ 85°C, with the primary difference being product status classification.

For applications where improved tolerance precision is acceptable, the TL431AIP offers ±1% tolerance while maintaining the extended temperature range of -40°C ~ 85°C. The TL431BIP provides the highest tolerance precision at ±0.4% with the same temperature range.

The TL431CP (Texas Instruments) is the only active product in this family, offering ±2.2% tolerance matching the original TL431IPG specification. However, the TL431CP operates within a narrower temperature range of 0°C ~ 70°C, requiring evaluation against application temperature requirements.

All substitute parts maintain identical package configuration (8-DIP through-hole), voltage output range (2.495V to 36V), and current output (100 mA), ensuring direct pin-compatible substitution in existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can TL431IP be used as a direct replacement for TL431IPG?

A: Yes. Both parts share identical electrical specifications: ±2.2% tolerance, 2.495V to 36V output range, 100 mA output current, and -40°C ~ 85°C operating temperature. The parts are pin-compatible in 8-DIP through-hole packages.

Q: What is the difference between TL431AIP and TL431BIP?

A: The primary difference is tolerance specification. TL431AIP provides ±1% tolerance, while TL431BIP provides ±0.4% tolerance. Both maintain identical voltage output range, current capacity, and extended temperature range (-40°C ~ 85°C). Selection depends on application precision requirements.

Q: Why does TL431CP have a narrower operating temperature range?

A: TL431CP operates from 0°C ~ 70°C, compared to -40°C ~ 85°C for other variants. Applications requiring extended temperature operation below 0°C or above 70°C must use alternative parts such as TL431IP, TL431AIP, or TL431BIP.

Q: Are all substitute parts available in 8-DIP through-hole packaging?

A: Yes. All listed substitute parts maintain the 8-DIP (0.300", 7.62mm) through-hole package configuration, enabling direct circuit board substitution without layout modifications.

Q: Which substitute part offers the best tolerance specification?

A: TL431BIP and TL431BCP both provide ±0.4% tolerance, the tightest specification in the TL431 family. TL431BIP maintains extended temperature range (-40°C ~ 85°C), while TL431BCP operates within 0°C ~ 70°C.

Q: Is TL431CP suitable for industrial temperature applications?

A: TL431CP operates within 0°C ~ 70°C and is classified as active product status. Applications requiring extended temperature operation (-40°C or above 70°C) require selection of alternative parts with appropriate temperature ratings.

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