TPS73233DBVRG4 Equivalent & Substitute Parts

Part Overview

The TPS73233DBVRG4 is a linear voltage regulator IC from Texas Instruments designed to deliver a fixed 3.3V output at 250mA in a compact SOT-23-5 surface mount package. This device is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The regulator features integrated protection against overcurrent, overtemperature, short circuit, and reverse polarity conditions, with an enable control feature for power management applications.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3.3V
Output Current	250mA
Input Voltage (Max)	5.5V
Dropout Voltage (Max)	0.15V @ 250mA
Quiescent Current	550 µA
Package Type	SOT-23-5 (SC-74A)
Operating Temperature Range	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Short Circuit, Reverse Polarity
Control Features	Enable
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the TPS73233DBVRG4 is determined by the following critical parameters: fixed 3.3V output voltage, surface mount SOT-23-5 package compatibility, positive output configuration, enable control feature, and operating temperature range of -40°C to 125°C. Output current capability is the primary differentiator among substitutes, with acceptable alternatives ranging from 150mA to 500mA depending on application requirements. Dropout voltage, quiescent current, and protection feature sets vary across substitutes but remain within acceptable ranges for equivalent functionality. All substitute parts maintain ROHS3 compliance and the same package footprint, ensuring direct PCB compatibility.

Parameter Comparison

Part Number	Manufacturer	Output Current	Dropout Voltage (Max)	Quiescent Current	Package	Product Status	Protection Features
TPS73233DBVRG4	Texas Instruments	250mA	0.15V @ 250mA	550 µA	SOT-23-5	Obsolete	OCP, OTP, SCP, Reverse Polarity
TPS73233DBVR	Texas Instruments	250mA	0.15V @ 250mA	550 µA	SOT-23-5	Active	OCP, OTP, SCP, Reverse Polarity
TPS73233DBVT	Texas Instruments	250mA	0.15V @ 250mA	550 µA	SOT-23-5	Active	OCP, OTP, SCP, Reverse Polarity
MIC5265-3.3YD5-TR	Microchip Technology	150mA	0.5V @ 150mA	2 µA	TSOT-23-5	Active	OTP, UVLO
MIC5301-3.3YD5-TR	Microchip Technology	150mA	0.1V @ 150mA	120 µA	TSOT-23-5	Active	OCP, OTP
MIC5305-3.3YD5-TR	Microchip Technology	150mA	0.85V @ 150mA	150 µA	TSOT-23-5	Active	OCP, OTP
MIC5323-3.3YD5-TR	Microchip Technology	300mA	0.17V @ 300mA	150 µA	TSOT-23-5	Active	OCP, OTP
NCP163ASN330T1G	onsemi	250mA	0.145V @ 250mA	20 µA	SOT-23-5	Active	OCP, OTP, Soft Start
RT9193-33GB	Richtek USA Inc.	300mA	0.3V @ 300mA	130 µA	SOT-23-5	Active	OCP, OTP
RT9193-33GJ5	Richtek USA Inc.	300mA	0.3V @ 300mA	130 µA	TSOT-23-5	Active	OCP, OTP
SP6205EM5-L-3-3/TR	MaxLinear, Inc.	500mA	0.5V @ 500mA	100 µA	SOT-23-5	Active	OCP, OTP

Engineering Selection Recommendations

For direct replacement of the obsolete TPS73233DBVRG4, the TPS73233DBVR and TPS73233DBVT from Texas Instruments are the primary equivalents, offering identical electrical specifications and active product status. Both parts maintain the same 250mA output current, 0.15V dropout voltage, and full protection feature set, with the distinction being packaging format (Cut Tape & Digi-Reel).

The NCP163ASN330T1G from onsemi provides an alternative with matching 250mA output current and superior quiescent current performance (20 µA versus 550 µA), while maintaining equivalent dropout voltage and protection capabilities. This part is ROHS3 compliant and actively supported.

For applications requiring higher output current capacity, the MIC5323-3.3YD5-TR (300mA) and RT9193-33GB (300mA) offer increased current delivery with minimal dropout voltage increase. The RT9193-33GB provides the highest current option at 300mA with active product status and ROHS3 compliance.

For applications with reduced current requirements below 250mA, the MIC5265-3.3YD5-TR, MIC5301-3.3YD5-TR, and MIC5305-3.3YD5-TR from Microchip Technology deliver 150mA output in TSOT-23-5 packages. The MIC5301-3.3YD5-TR offers the lowest dropout voltage (0.1V @ 150mA) among the 150mA options.

All recommended substitutes maintain ROHS3 compliance, -40°C to 125°C operating temperature range, and enable control functionality. Package compatibility must be verified: SOT-23-5 variants are directly compatible with the original footprint, while TSOT-23-5 variants require confirmation of PCB layout accommodation for the thinner package profile.

Frequently Asked Questions (FAQ)

Q: Can TPS73233DBVR and TPS73233DBVT be used interchangeably with TPS73233DBVRG4?

A: Yes. Both parts are parametric equivalents with identical electrical specifications: 250mA output current, 0.15V dropout voltage, 550 µA quiescent current, and matching protection features. The primary difference is packaging format (Cut Tape & Digi-Reel versus the original format). Both are active products from Texas Instruments.

Q: What is the difference between SOT-23-5 and TSOT-23-5 packages?

A: TSOT-23-5 is a thinner variant of the SOT-23-5 package. Both share the same footprint and pin configuration, but TSOT-23-5 has reduced height. PCB layout compatibility should be verified before substitution, particularly for applications with height constraints or existing board designs.

Q: Can I use a 150mA regulator (MIC5265, MIC5301, MIC5305) to replace the 250mA TPS73233DBVRG4?

A: Only if your application draws less than 150mA. The MIC5265-3.3YD5-TR, MIC5301-3.3YD5-TR, and MIC5305-3.3YD5-TR are rated for maximum 150mA output. Exceeding this current will trigger overcurrent protection or cause voltage regulation failure. Verify your circuit's actual current draw before selecting a lower-rated substitute.

Q: Which substitute offers the best dropout voltage performance?

A: The MIC5301-3.3YD5-TR provides the lowest dropout voltage at 0.1V @ 150mA. For 250mA operation, the TPS73233DBVR and TPS73233DBVT maintain 0.15V dropout, while the NCP163ASN330T1G offers 0.145V @ 250mA. The RT9193-33GB and RT9193-33GJ5 have higher dropout at 0.3V @ 300mA.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance. The RT9193-33GB and RT9193-33GJ5 have MSL rating of 3 (168 Hours) versus MSL 1 (Unlimited) for other parts, which may affect storage and handling requirements in high-humidity environments.

Q: What is the quiescent current advantage of the NCP163ASN330T1G?

A: The NCP163ASN330T1G draws only 20 µA quiescent current compared to 550 µA for the TPS73233DBVRG4. This 27.5x reduction in standby current consumption is significant for battery-powered or low-power applications where the regulator remains enabled but delivers minimal load current.

Q: Can I use the SP6205EM5-L-3-3/TR for higher current applications?

A: Yes. The SP6205EM5-L-3-3/TR is rated for 500mA output, providing the highest current capacity among all listed substitutes. It maintains 3.3V fixed output, SOT-23-5 package compatibility, and active product status. Dropout voltage is 0.5V @ 500mA, which is higher than the original part but acceptable for most applications.

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