SP6201EM5-L-3-3 Linear Voltage Regulator - Equivalent & Substitute Parts

Part Overview

The SP6201EM5-L-3-3 is a linear voltage regulator IC manufactured by MaxLinear, Inc., designed to deliver a fixed 3.3V output at 200mA in a compact SOT-23-5 surface mount package. This device provides positive fixed output regulation with integrated over-current and over-temperature protection, operating across the industrial temperature range of -40°C to 125°C.

The SP6201EM5-L-3-3 has been discontinued at DiGi Electronics. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements. Suitable alternatives must maintain electrical compatibility across output voltage, current capacity, input voltage tolerance, dropout voltage, and package form factor while meeting RoHS and MSL requirements.

Key Parameters

Parameter	SP6201EM5-L-3-3
Output Voltage (Fixed)	3.3V
Output Current	200mA
Input Voltage (Max)	6V
Dropout Voltage (Max)	0.5V @ 200mA
Package / Case	SC-74A, SOT-753 (SOT-23-5)
Operating Temperature	-40°C to 125°C
Protection Features	Over Current, Over Temperature
Control Features	Enable
RoHS Status	RoHS Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the SP6201EM5-L-3-3 is determined by the following critical parameters:

Fixed Criteria (Non-Negotiable):

Output voltage: 3.3V fixed
Package type: SOT-23-5 (SC-74A, SOT-753)
Mounting type: Surface mount
Operating temperature range: -40°C to 125°C minimum
RoHS compliance status

Flexible Criteria (Application-Dependent):

Output current capacity: Minimum 200mA required for direct replacement; higher ratings acceptable
Input voltage maximum: 6V or higher acceptable
Dropout voltage: Lower values preferred but not mandatory
Control features: Enable function required; Power Good output optional
Protection features: Over-temperature protection required; additional protections acceptable

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

Category A - Direct Current Replacement (≥200mA): Parts with 200mA or greater output current provide direct functional equivalence and can replace the SP6201EM5-L-3-3 without circuit redesign.

Category B - Reduced Current Capacity (<200mA): Parts with output current below 200mA are suitable only for applications where the actual load current does not exceed the substitute part's rating. These require design review before implementation.

Parameter Comparison

Part Number	Manufacturer	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Operating Temp	Control Features	Protection Features	Product Status	RoHS Status
SP6201EM5-L-3-3	MaxLinear, Inc.	200mA	6V	0.5V @ 200mA	-40°C to 125°C	Enable	Over Current, Over Temperature	Discontinued	RoHS Compliant
FAN2558S33X	onsemi	180mA	5.5V	Not specified	-40°C to 85°C	Enable, Power Good	Over Current, Over Temperature	Obsolete	ROHS3 Compliant
LP3988IMF-3.3/NOPB	Texas Instruments	150mA	6V	0.15V @ 150mA	-40°C to 125°C	Enable, Power Good	Over Temperature, Short Circuit	Active	ROHS3 Compliant
LP3988IMFX-3.3/NOPB	Texas Instruments	150mA	6V	0.15V @ 150mA	-40°C to 125°C	Enable, Power Good	Over Temperature, Short Circuit	Active	ROHS3 Compliant
MCP1824T-3302E/OT	Microchip Technology	300mA	6V	0.32V @ 300mA	-40°C to 125°C	Enable, Power Good	Over Temperature, Short Circuit, UVLO	Active	ROHS3 Compliant
RT9167-33GB	Richtek USA Inc.	300mA	7V	0.45V @ 300mA	-40°C to 125°C	Enable	Over Current, Over Temperature	Active	ROHS3 Compliant
TC1054-3.3VCT713	Microchip Technology	50mA	6.5V	0.12V @ 50mA	-40°C to 125°C	Enable	Over Current, Over Temperature	Active	ROHS3 Compliant
TC1055-3.3VCT713	Microchip Technology	100mA	6.5V	0.25V @ 100mA	-40°C to 125°C	Enable	Over Current, Over Temperature	Active	ROHS3 Compliant
TC1186-3.3VCT713	Microchip Technology	150mA	6.5V	0.4V @ 150mA	-40°C to 125°C	Enable	Over Current, Over Temperature	Active	ROHS3 Compliant

Engineering Selection Recommendations

Recommended Direct Replacements (Category A - ≥200mA Output Current):

MCP1824T-3302E/OT and RT9167-33GB are the primary candidates for direct replacement of the SP6201EM5-L-3-3. Both devices deliver 300mA output current, exceeding the original 200mA specification, and maintain full operating temperature range compatibility (-40°C to 125°C). Both are actively manufactured and ROHS3 compliant, ensuring long-term supply availability and regulatory compliance.

MCP1824T-3302E/OT offers superior dropout voltage performance (0.32V @ 300mA) and includes additional protection features (Under Voltage Lockout). RT9167-33GB provides higher input voltage tolerance (7V maximum) and maintains feature parity with the original device (Enable control, Over Current and Over Temperature protection).

Alternative Substitutes (Category B - <200mA Output Current):

LP3988IMF-3.3/NOPB and LP3988IMFX-3.3/NOPB (Texas Instruments, 150mA) are suitable for applications where actual load current does not exceed 150mA. These devices feature superior dropout voltage (0.15V @ 150mA), extended control features (Power Good output), and active product status. The primary difference between these variants is packaging: LP3988IMF-3.3/NOPB is supplied in Cut Tape format, while LP3988IMFX-3.3/NOPB is supplied in Tape & Reel format.

TC1186-3.3VCT713 (Microchip Technology, 150mA) provides an alternative with higher input voltage tolerance (6.5V) and active status. TC1055-3.3VCT713 (100mA) and TC1054-3.3VCT713 (50mA) are suitable only for low-current applications and require design verification.

FAN2558S33X (onsemi, 180mA) approaches the original current specification but operates at reduced maximum temperature (85°C versus 125°C) and lower input voltage maximum (5.5V). This device is marked as Obsolete and should be avoided for new designs.

Selection Criteria Summary:

For applications requiring full 200mA or greater capacity: Select MCP1824T-3302E/OT or RT9167-33GB
For applications with ≤150mA load current: Select LP3988IMF-3.3/NOPB, LP3988IMFX-3.3/NOPB, or TC1186-3.3VCT713
Verify actual load current requirements before selecting Category B alternatives
Prioritize active product status for supply chain continuity
Confirm ROHS3 compliance for regulatory requirements

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with lower output current rating than the original SP6201EM5-L-3-3?

A: Yes, but only if your application's actual load current does not exceed the substitute part's rating. The SP6201EM5-L-3-3 is rated for 200mA maximum output. If your circuit draws 150mA or less, parts such as LP3988IMF-3.3/NOPB (150mA) or TC1186-3.3VCT713 (150mA) are acceptable. If your circuit draws more than 200mA, you must select a substitute with equal or greater current capacity, such as MCP1824T-3302E/OT or RT9167-33GB (both 300mA).

Q: What is the difference between LP3988IMF-3.3/NOPB and LP3988IMFX-3.3/NOPB?

A: Both parts are electrically identical Texas Instruments linear regulators with 150mA output current and 3.3V fixed output. The difference is packaging format: LP3988IMF-3.3/NOPB is supplied in Cut Tape (CT) & Digi-Reel format, while LP3988IMFX-3.3/NOPB is supplied in Tape & Reel (TR) format. Select based on your procurement and assembly process requirements.

Q: Why is the SP6201EM5-L-3-3 discontinued, and what should I do?

A: The SP6201EM5-L-3-3 has been discontinued at DiGi Electronics. For new designs or ongoing production, transition to an active substitute part. MCP1824T-3302E/OT and RT9167-33GB are actively manufactured alternatives with superior or equivalent specifications. For existing inventory, the part remains available from secondary sources, but long-term supply cannot be guaranteed.

Q: Are all substitute parts RoHS compliant?

A: Yes. The original SP6201EM5-L-3-3 is RoHS Compliant. All listed substitute parts are ROHS3 Compliant, which exceeds the original requirement and ensures regulatory compliance for current and future applications.

Q: Can I use FAN2558S33X as a substitute?

A: FAN2558S33X is not recommended. Although it provides 180mA output current (close to the original 200mA), it is marked as Obsolete, operates at reduced maximum temperature (85°C versus 125°C), and has lower input voltage tolerance (5.5V versus 6V). For new designs, select MCP1824T-3302E/OT or RT9167-33GB instead.

Q: What is the difference between the TC1054, TC1055, and TC1186 series?

A: These are all Microchip Technology linear regulators in SOT-23-5 packages with 3.3V fixed output and identical control/protection features. The primary difference is output current capacity: TC1054 provides 50mA, TC1055 provides 100mA, and TC1186 provides 150mA. Select based on your application's current requirement. All three are active products with ROHS3 compliance.

Q: Does the substitute part need to have the same dropout voltage as the original?

A: No. Lower dropout voltage is beneficial and acceptable. The original SP6201EM5-L-3-3 has 0.5V dropout at 200mA. Substitutes with lower dropout voltage (such as LP3988IMF-3.3/NOPB at 0.15V @ 150mA or TC1054-3.3VCT713 at 0.12V @ 50mA) provide improved efficiency and are fully compatible. Higher dropout voltage is acceptable if your input voltage headroom permits.

Q: Can I use a substitute with higher input voltage rating?

A: Yes. The original SP6201EM5-L-3-3 accepts input voltage up to 6V. Substitutes with higher input voltage ratings (such as RT9167-33GB at 7V or TC1054-3.3VCT713 at 6.5V) are fully compatible and provide additional design margin. Your actual input voltage must not exceed the substitute part's maximum rating.

Q: What does "Power Good" output mean, and do I need it?

A: Power Good is an optional output signal that indicates when the regulator output voltage is within specification. Some substitutes (LP3988IMF-3.3/NOPB, MCP1824T-3302E/OT) include this feature; others do not. If your circuit does not monitor this signal, the presence or absence of Power Good does not affect compatibility. If your design requires Power Good monitoring, select a substitute that includes this feature.

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