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MAX666CSA Linear Voltage Regulator IC
Part Overview
The MAX666CSA is a linear voltage regulator IC from Analog Devices Inc./Maxim Integrated, classified as a Power Management (PMIC) component. This device functions as a positive adjustable (fixed) output regulator with a single output capable of delivering 40mA. The MAX666CSA is currently listed as obsolete, which necessitates identification of functionally equivalent substitute components for ongoing design support and procurement purposes.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated |
| Category | Power Management (PMIC) |
| Description | IC REG LIN POS ADJ 40MA 8SOIC |
| Output Configuration | Positive |
| Output Type | Adjustable (Fixed) |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 16.5V |
| Voltage - Output (Min/Fixed) | 1.3V (5V) |
| Voltage - Output (Max) | 16V |
| Voltage Dropout (Max) | 0.9V @ 40mA |
| Current - Output | 40mA |
| Current - Quiescent (Iq) | 15 µA |
| Control Features | Current Limit, Enable, Low Battery Detection |
| Operating Temperature | 0°C ~ 70°C |
| Mounting Type | Surface Mount |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Base Product Number | MAX666 |
Substitute Part Grouping Explanation
Substitution of the MAX666CSA is determined by strict equivalence across the following electrical and mechanical parameters:
- Output configuration (positive)
- Output type (adjustable/fixed)
- Number of regulators (single output)
- Input voltage range (maximum 16.5V)
- Output voltage range (1.3V to 16V)
- Dropout voltage specification (0.9V @ 40mA)
- Output current capability (40mA)
- Quiescent current (15 µA)
- Control features (current limit, enable, low battery detection)
- Operating temperature range (0°C ~ 70°C)
- Package type (8-SOIC)
The MAX666CSA+ meets all these criteria and is identified as a direct substitute.
Parameter Comparison
| Parameter | MAX666CSA | MAX666CSA+ |
|---|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated |
| Product Status | Obsolete | Active |
| Output Configuration | Positive | Positive |
| Output Type | Adjustable (Fixed) | Adjustable (Fixed) |
| Number of Regulators | 1 | 1 |
| Voltage - Input (Max) | 16.5V | 16.5V |
| Voltage - Output (Min/Fixed) | 1.3V (5V) | 1.3V (5V) |
| Voltage - Output (Max) | 16V | 16V |
| Voltage Dropout (Max) | 0.9V @ 40mA | 0.9V @ 40mA |
| Current - Output | 40mA | 40mA |
| Current - Quiescent (Iq) | 15 µA | 15 µA |
| Control Features | Current Limit, Enable, Low Battery Detection | Current Limit, Enable, Low Battery Detection |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) |
| Base Product Number | MAX666 | MAX666 |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
| Packaging | Not specified | Tube |
Engineering Selection Recommendations
The MAX666CSA+ is the direct substitute for the obsolete MAX666CSA. Both components share identical electrical specifications and package configuration. The primary distinction is product status: the MAX666CSA+ is currently active and available for procurement, whereas the MAX666CSA is obsolete.
An additional consideration is regulatory compliance. The MAX666CSA+ is ROHS3 compliant, whereas the original MAX666CSA is RoHS non-compliant. For applications subject to RoHS requirements, the MAX666CSA+ provides compliance alignment. Both components maintain REACH unaffected status and EAR99 export classification.
Frequently Asked Questions (FAQ)
Q: Can the MAX666CSA+ be used as a direct replacement for the MAX666CSA?
A: Yes. The MAX666CSA+ is electrically and mechanically equivalent to the MAX666CSA across all specified parameters, including output voltage range, current capability, dropout voltage, control features, and package type.
Q: What is the primary reason to transition from MAX666CSA to MAX666CSA+?
A: The MAX666CSA is obsolete and no longer manufactured. The MAX666CSA+ is the active equivalent part from the same manufacturer and supplier base, ensuring continued availability and design support.
Q: Are there any compliance differences between these parts?
A: Yes. The MAX666CSA+ is ROHS3 compliant, while the MAX666CSA is RoHS non-compliant. For applications requiring RoHS compliance, the MAX666CSA+ is the appropriate selection.
Q: Is the 8-SOIC package identical between both parts?
A: Yes. Both the MAX666CSA and MAX666CSA+ use the same 8-SOIC package with 0.154" width (3.90mm), ensuring PCB layout and footprint compatibility.
Q: Are the electrical specifications identical?
A: Yes. Input voltage range, output voltage range, dropout voltage, output current, quiescent current, and control features are identical between the MAX666CSA and MAX666CSA+.
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