TPS73633MDBVREP Equivalent & Substitute Parts

Part Overview

The TPS73633MDBVREP is a linear voltage regulator IC manufactured by Texas Instruments, designed to deliver a fixed 3.3V output at 400mA in a compact SOT-23-5 surface mount package. This device is classified as a Power Management PMIC with active product status and full RoHS3 compliance. The regulator integrates over-current, over-temperature, and reverse polarity protection, making it suitable for low-noise power supply applications requiring stable 3.3V regulation from input sources up to 5.5V.

Equivalent and substitute parts are identified based on matching output voltage (3.3V fixed), compatible packaging (SOT-23-5), surface mount technology, and overlapping electrical performance parameters. Substitutes may vary in output current capacity, dropout voltage, quiescent current, and PSRR characteristics while maintaining functional compatibility within specified operating ranges.

Key Parameters

Parameter	Value
Manufacturer Part Number	TPS73633MDBVREP
Manufacturer	Texas Instruments
Output Voltage (Fixed)	3.3V
Output Current	400mA
Input Voltage (Max)	5.5V
Dropout Voltage (Max)	0.2V @ 400mA
Package / Case	SOT-23-5, SC-74A
Mounting Type	Surface Mount
Operating Temperature Range	-55°C ~ 125°C
Product Status	Active
RoHS Status	RoHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the TPS73633MDBVREP are qualified based on the following criteria:

Fixed Output Voltage: All substitutes maintain 3.3V fixed output voltage, ensuring direct functional replacement in circuits designed for this voltage level.

Package Compatibility: All substitutes use SOT-23-5 or TSOT-23-5 packaging, maintaining identical PCB footprint and pin configuration for direct board-level substitution.

Input Voltage Range: All substitutes accept maximum input voltage of 5.5V, matching the main part's input specification.

Surface Mount Technology: All substitutes are surface mount devices, compatible with automated assembly processes.

Output Current Capacity: Substitutes range from 150mA to 500mA. Parts with lower current ratings (150mA) are suitable for applications requiring less than 150mA. Parts with equal or higher current ratings (300mA, 400mA, 500mA) provide direct or enhanced current capability.

Protection Features: All substitutes include over-temperature protection. Over-current and reverse polarity protection vary by part and must be verified against application requirements.

Product Status & Compliance: All substitutes maintain active product status and RoHS3 compliance, ensuring long-term availability and regulatory conformance.

Parameter Comparison

Parameter	TPS73633MDBVREP	MIC5265-3.3YD5-TR	MIC5301-3.3YD5-TR	MIC5305-3.3YD5-TR	RT9193-33GB	SP6205EM5-L-3-3/TR
Manufacturer	Texas Instruments	Microchip Technology	Microchip Technology	Microchip Technology	Richtek USA Inc.	MaxLinear, Inc.
Output Voltage	3.3V	3.3V	3.3V	3.3V	3.3V	3.3V
Output Current	400mA	150mA	150mA	150mA	300mA	500mA
Input Voltage (Max)	5.5V	5.5V	5.5V	5.5V	5.5V	5.5V
Dropout Voltage (Max)	0.2V @ 400mA	0.5V @ 150mA	0.1V @ 150mA	0.85V @ 150mA	0.3V @ 300mA	0.5V @ 500mA
Quiescent Current (Iq)	550 µA	2 µA	120 µA	150 µA	130 µA	100 µA
PSRR	58dB ~ 37dB (100Hz ~ 10kHz)	64dB ~ 62dB (1kHz ~ 100Hz)	75dB ~ 50dB (1kHz ~ 20kHz)	85dB ~ 65dB (1kHz ~ 10kHz)	70dB ~ 50dB (100Hz ~ 10kHz)	67dB (1kHz)
Package / Case	SOT-23-5, SC-74A	TSOT-23-5	TSOT-23-5	TSOT-23-5	SOT-23-5, SC-74A	SOT-23-5, SC-74A
Operating Temperature	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
RoHS Status	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS Compliant
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Replacement (Equal or Enhanced Current Capacity):

RT9193-33GB and SP6205EM5-L-3-3/TR are suitable for direct replacement in applications where the TPS73633MDBVREP is specified. RT9193-33GB provides 300mA output current with 0.3V dropout voltage, while SP6205EM5-L-3-3/TR delivers 500mA output current with 0.5V dropout voltage. Both maintain SOT-23-5 packaging and active product status. SP6205EM5-L-3-3/TR offers superior current capacity for applications requiring higher load current.

Current-Limited Substitution (Reduced Current Capacity):

MIC5265-3.3YD5-TR, MIC5301-3.3YD5-TR, and MIC5305-3.3YD5-TR are limited to 150mA output current and are suitable only for applications where load current does not exceed 150mA. These parts are not suitable for applications requiring the full 400mA capacity of the TPS73633MDBVREP.

Temperature Range Consideration:

The TPS73633MDBVREP operates from -55°C to 125°C. All substitute parts operate from -40°C to 125°C. Applications requiring operation below -40°C must retain the TPS73633MDBVREP.

Compliance & Availability:

All substitute parts maintain active product status and RoHS3 compliance, ensuring regulatory conformance and long-term supply availability. Moisture sensitivity levels vary; verify MSL requirements against assembly and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can MIC5265-3.3YD5-TR replace TPS73633MDBVREP in all applications?

A: No. MIC5265-3.3YD5-TR is limited to 150mA output current, while TPS73633MDBVREP delivers 400mA. Substitution is valid only for applications where load current does not exceed 150mA.

Q: What is the difference between RT9193-33GB and SP6205EM5-L-3-3/TR?

A: Both are direct replacements with matching 3.3V output and SOT-23-5 packaging. RT9193-33GB provides 300mA at 0.3V dropout, while SP6205EM5-L-3-3/TR provides 500mA at 0.5V dropout. Select SP6205EM5-L-3-3/TR for applications requiring higher current capacity.

Q: Are TSOT-23-5 and SOT-23-5 packages interchangeable?

A: TSOT-23-5 (thin SOT-23-5) and SOT-23-5 share identical pin configuration and PCB footprint. Both are compatible with standard SOT-23-5 land patterns. Verify component height clearance in your specific PCB assembly.

Q: Why does MIC5301-3.3YD5-TR have lower dropout voltage than MIC5305-3.3YD5-TR?

A: Dropout voltage is a device-specific characteristic determined by internal circuit design. MIC5301-3.3YD5-TR exhibits 0.1V dropout at 150mA, while MIC5305-3.3YD5-TR exhibits 0.85V dropout at the same current. Select based on your input voltage margin and thermal requirements.

Q: Can I use a substitute part with lower quiescent current to reduce power consumption?

A: Yes. MIC5265-3.3YD5-TR has 2 µA quiescent current compared to TPS73633MDBVREP's 550 µA. This substitution reduces standby power consumption but is limited to applications with load current not exceeding 150mA.

Q: What does PSRR mean and why does it vary between parts?

A: PSRR (Power Supply Rejection Ratio) measures the regulator's ability to reject input voltage noise. Higher PSRR values indicate better noise rejection. MIC5305-3.3YD5-TR provides 85dB PSRR at 1kHz, superior to TPS73633MDBVREP's 58dB. Select higher PSRR parts for noise-sensitive applications.

Q: Is the operating temperature range difference significant?

A: TPS73633MDBVREP operates from -55°C to 125°C, while substitutes operate from -40°C to 125°C. If your application requires operation below -40°C, retain the TPS73633MDBVREP. For standard industrial and commercial temperature ranges, substitutes are acceptable.

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