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ST662ABD Equivalent & Substitute Parts
Part Overview
The ST662ABD is a charge pump switching regulator IC manufactured by STMicroelectronics, designed to provide a fixed 12V output from a 4.5V to 5.5V input supply. This device operates as a step-up converter with a single positive output delivering 30mA at 400kHz switching frequency in an 8-SOIC surface mount package. The ST662ABD is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Active alternatives from Analog Devices Inc. provide compatible electrical and mechanical specifications while maintaining current product status and full compliance certifications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | ST662ABD |
| Manufacturer | STMicroelectronics |
| Category | Power Management (PMIC) |
| Function | Step-Up Charge Pump Regulator |
| Voltage - Input (Min) | 4.5V |
| Voltage - Input (Max) | 5.5V |
| Voltage - Output (Fixed) | 12V |
| Current - Output | 30mA |
| Frequency - Switching | 400kHz |
| Number of Outputs | 1 |
| Output Type | Fixed |
| Output Configuration | Positive |
| Topology | Charge Pump |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution of the ST662ABD is determined by strict alignment of the following electrical and mechanical parameters:
Critical Substitution Parameters:
- Input voltage range: 4.5V to 5.5V (substitute range: 4.75V to 5.5V)
- Output voltage: Fixed 12V
- Number of outputs: Single output
- Output configuration: Positive
- Package type: 8-SOIC (0.154", 3.90mm Width)
- Mounting type: Surface Mount
- RoHS3 compliance
- MSL rating: 1 (Unlimited)
The substitute parts from Analog Devices Inc. (LTC1262 and LTC1263 series) meet these core electrical and mechanical requirements. The LTC1262 and LTC1263 devices function as converter and programming supply voltage regulators with identical 12V fixed output, single output configuration, and 8-SOIC packaging. Input voltage specifications for substitutes (4.75V to 5.5V) fall within the operational range of the ST662ABD (4.5V to 5.5V). All substitute parts maintain ROHS3 compliance and MSL 1 rating.
Temperature grade variants (C-grade: 0°C to 70°C; I-grade: -40°C to 85°C) and packaging formats (Tube or Tape & Reel) are available to match specific application requirements. The I-grade variants (LTC1262IS8 and LTC1263IS8 series) provide identical temperature range coverage to the ST662ABD.
Parameter Comparison
| Parameter | ST662ABD | LTC1262CS8#PBF | LTC1262CS8#TRPBF | LTC1262IS8#PBF | LTC1262IS8#TRPBF | LTC1263CS8#PBF | LTC1263CS8#TRPBF | LTC1263IS8#PBF | LTC1263IS8#TRPBF |
|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | STMicroelectronics | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. |
| Voltage - Input (Min) | 4.5V | 4.75V | 4.75V | 4.75V | 4.75V | 4.75V | 4.75V | 4.75V | 4.75V |
| Voltage - Input (Max) | 5.5V | 5.5V | 5.5V | 5.5V | 5.5V | 5.5V | 5.5V | 5.5V | 5.5V |
| Voltage - Output (Fixed) | 12V | 12V | 12V | 12V | 12V | 12V | 12V | 12V | 12V |
| Number of Outputs | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Output Configuration | Positive | Positive | Positive | Positive | Positive | Positive | Positive | Positive | Positive |
| Operating Temperature (Min) | -40°C | 0°C | 0°C | -40°C | -40°C | 0°C | 0°C | -40°C | -40°C |
| Operating Temperature (Max) | 85°C | 70°C | 70°C | 85°C | 85°C | 70°C | 70°C | 85°C | 85°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active | Active |
| Packaging Format | Not specified | Tube | Tape & Reel (TR) | Tube | Tape & Reel (TR) | Tube | Tape & Reel (TR) | Tube | Tape & Reel (TR) |
Engineering Selection Recommendations
Product Status Consideration: The ST662ABD is classified as obsolete. All substitute parts from the Analog Devices Inc. LTC1262 and LTC1263 series maintain active product status, ensuring ongoing availability, technical support, and manufacturing continuity.
Temperature Grade Selection: For applications requiring the full -40°C to 85°C operating range of the ST662ABD, select I-grade variants: LTC1262IS8#PBF, LTC1262IS8#TRPBF, LTC1263IS8#PBF, or LTC1263IS8#TRPBF. These devices provide identical temperature coverage.
For applications with reduced temperature requirements (0°C to 70°C), C-grade variants (LTC1262CS8#PBF, LTC1262CS8#TRPBF, LTC1263CS8#PBF, LTC1263CS8#TRPBF) are available.
Packaging Format Selection: Tube packaging (suffix #PBF) is suitable for manual assembly and lower-volume applications. Tape & Reel packaging (suffix #TRPBF) is optimized for automated pick-and-place assembly and higher-volume production.
Compliance and Certification: All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) rating, matching the environmental and handling specifications of the ST662ABD. All parts carry EAR99 ECCN classification and REACH Unaffected status.
Input Voltage Margin: The substitute parts specify a minimum input voltage of 4.75V, compared to the ST662ABD minimum of 4.5V. Applications operating below 4.75V require verification of substitute part performance at the lower input threshold.
Frequently Asked Questions (FAQ)
Q: Can LTC1262 and LTC1263 devices be used interchangeably with the ST662ABD?
A: Yes, both LTC1262 and LTC1263 series devices are electrically and mechanically compatible with the ST662ABD. All devices provide fixed 12V output from 4.75V to 5.5V input, operate in 8-SOIC packages, and maintain identical compliance certifications. Selection between LTC1262 and LTC1263 variants depends on temperature grade and packaging format requirements.
Q: What is the difference between C-grade and I-grade temperature variants?
A: C-grade variants (LTC1262CS8, LTC1263CS8) operate from 0°C to 70°C. I-grade variants (LTC1262IS8, LTC1263IS8) operate from -40°C to 85°C, matching the full temperature range of the ST662ABD. Select I-grade for applications requiring extended low-temperature operation.
Q: What is the difference between Tube and Tape & Reel packaging?
A: Tube packaging (#PBF suffix) contains components in a plastic tube suitable for manual handling and small-quantity assembly. Tape & Reel packaging (#TRPBF suffix) provides components on continuous tape for automated pick-and-place assembly equipment. Both formats contain identical components; packaging selection depends on assembly process requirements.
Q: Is the input voltage range difference between ST662ABD (4.5V min) and substitutes (4.75V min) significant?
A: The 0.25V difference in minimum input voltage specification should be evaluated for applications operating near the lower input threshold. If the application requires operation below 4.75V input, the ST662ABD specification provides a wider margin. For applications with input supplies at or above 4.75V, substitute parts operate within specification.
Q: Are all substitute parts currently in stock?
A: Inventory status is provided for reference. LTC1262 and LTC1263 variants maintain active product status with multiple units available across different packaging and temperature grade options. Verify current availability with your component supplier for specific part numbers and quantities.
Q: Do substitute parts require circuit design modifications?
A: No circuit design modifications are required. The LTC1262 and LTC1263 devices are pin-compatible and functionally equivalent to the ST662ABD in 8-SOIC packages. PCB layout and external component values remain unchanged.
Q: What compliance certifications apply to substitute parts?
A: All substitute parts are ROHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity rating, maintain REACH Unaffected status, and are classified as EAR99 for export control purposes. These certifications match the ST662ABD specifications.
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