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S-8337AADB-T8T1G Equivalent & Substitute Parts
Part Overview
The S-8337AADB-T8T1G is a Boost Regulator Positive Output Step-Up DC-DC Controller IC manufactured by ABLIC Inc. in 8-TSSOP surface mount packaging. This device functions as a transistor driver for step-up (boost) topology applications with a single positive output phase, operating across a 1.8V to 6V supply voltage range. The part is classified as Not For New Designs, indicating its legacy status in the product lifecycle. Equivalent and substitute parts are necessary to address inventory constraints, packaging preferences, or product status requirements in active production environments.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | ABLIC Inc. |
| Category | Power Management (PMIC) |
| Function | Step-Up (Boost) |
| Output Type | Transistor Driver |
| Output Configuration | Positive |
| Number of Outputs | 1 |
| Voltage Supply Range (Vcc/Vdd) | 1.8V ~ 6V |
| Duty Cycle (Max) | 89% |
| Package / Case | 8-TSSOP (0.173", 4.40mm Width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C (TA) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the S-8337AADB-T8T1G is determined by strict alignment across the following critical parameters:
- Output Type: Transistor Driver
- Function: Step-Up (Boost)
- Output Configuration: Positive
- Number of Outputs: 1
- Voltage Supply Range: 1.8V ~ 6V
- Duty Cycle (Max): 89%
- Package / Case: 8-TSSOP (0.173", 4.40mm Width)
- Mounting Type: Surface Mount
- Operating Temperature: -40°C ~ 85°C (TA)
- RoHS Status: ROHS3 Compliant
- Moisture Sensitivity Level: 1 (Unlimited)
Substitute parts are grouped into two categories:
Category A: S-8333 Series (Active Status) Parts S-8333CBDA-T8T1U, S-8333CCBC-T8T1U, S-8333TCDA-T8T1U, S-8333TCDB-T8T1U, S-8333TCDC-T8T1U, S-8333TCIA-T8T1U, and S-8333TCIB-T8T1U maintain full parametric equivalence with the main part across all critical electrical and mechanical specifications. These parts differ in switching frequency range (280kHz ~ 1.08MHz versus 257.4kHz ~ 1.134MHz) and control features (Current Limit, Frequency Control versus Current Limit, Enable, Frequency Control). Packaging variants include both Tape & Reel (TR) and Cut Tape (CT) options.
Category B: S-8337ABIA-T8T1U (Active Status) This part maintains identical electrical specifications and control features to the main part S-8337AADB-T8T1G, including the same switching frequency range (257.4kHz ~ 1.134MHz) and control feature set (Current Limit, Enable, Frequency Control). The primary distinction is packaging format: S-8337ABIA-T8T1U is supplied in Cut Tape (CT) format, whereas the main part is supplied in Tape & Reel (TR) format.
Parameter Comparison
| Parameter | S-8337AADB-T8T1G (Main) | S-8333CBDA-T8T1U | S-8333CCBC-T8T1U | S-8333TCDA-T8T1U | S-8333TCDB-T8T1U | S-8333TCDC-T8T1U | S-8333TCIA-T8T1U | S-8333TCIB-T8T1U | S-8337ABIA-T8T1U |
|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | ABLIC Inc. | ABLIC Inc. | ABLIC Inc. | ABLIC Inc. | ABLIC Inc. | ABLIC Inc. | ABLIC Inc. | ABLIC Inc. | ABLIC Inc. |
| Product Status | Not For New Designs | Active | Active | Active | Active | Active | Active | Active | Active |
| Packaging | Tape & Reel (TR) | Tape & Reel (TR) | Cut Tape (CT) | Tape & Reel (TR) | Tape & Reel (TR) | Tape & Reel (TR) | Tape & Reel (TR) | Tape & Reel (TR) | Cut Tape (CT) |
| Output Type | Transistor Driver | Transistor Driver | Transistor Driver | Transistor Driver | Transistor Driver | Transistor Driver | Transistor Driver | Transistor Driver | Transistor Driver |
| Function | Step-Up | Step-Up | Step-Up | Step-Up | Step-Up | Step-Up | Step-Up | Step-Up | Step-Up |
| Output Configuration | Positive | Positive | Positive | Positive | Positive | Positive | Positive | Positive | Positive |
| Number of Outputs | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage Supply Range (Vcc/Vdd) | 1.8V ~ 6V | 1.8V ~ 6V | 1.8V ~ 6V | 1.8V ~ 6V | 1.8V ~ 6V | 1.8V ~ 6V | 1.8V ~ 6V | 1.8V ~ 6V | 1.8V ~ 6V |
| Frequency - Switching | 257.4kHz ~ 1.134MHz | 280kHz ~ 1.08MHz | 280kHz ~ 1.08MHz | 280kHz ~ 1.08MHz | 280kHz ~ 1.08MHz | 280kHz ~ 1.08MHz | 280kHz ~ 1.08MHz | 280kHz ~ 1.08MHz | 257.4kHz ~ 1.134MHz |
| Duty Cycle (Max) | 89% | 89% | 89% | 89% | 89% | 89% | 89% | 89% | 89% |
| Control Features | Current Limit, Enable, Frequency Control | Current Limit, Frequency Control | Current Limit, Frequency Control | Current Limit, Frequency Control | Current Limit, Frequency Control | Current Limit, Frequency Control | Current Limit, Frequency Control | Current Limit, Frequency Control | Current Limit, Enable, Frequency Control |
| Package / Case | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP (0.173", 4.40mm Width) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| 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) |
| Inventory (Pcs) | 1100 | 974 | 728 | 1053 | 1002 | 935 | 1069 | 733 | 760 |
Engineering Selection Recommendations
For Active Production Designs: Select S-8337ABIA-T8T1U as the primary substitute. This part maintains identical electrical specifications, control feature set, and switching frequency range to the main part S-8337AADB-T8T1G. The only distinction is packaging format (Cut Tape versus Tape & Reel), which does not affect electrical performance or compliance. Both parts are ROHS3 compliant with MSL 1 (Unlimited) rating and identical operating temperature ranges.
For Designs Tolerant of Switching Frequency Variation: The S-8333 series (S-8333CBDA-T8T1U, S-8333CCBC-T8T1U, S-8333TCDA-T8T1U, S-8333TCDB-T8T1U, S-8333TCDC-T8T1U, S-8333TCIA-T8T1U, S-8333TCIB-T8T1U) provides full parametric equivalence with the exception of switching frequency range (280kHz ~ 1.08MHz versus 257.4kHz ~ 1.134MHz) and control features (absence of Enable function). All S-8333 variants are Active status parts with ROHS3 compliance and MSL 1 rating. Selection among S-8333 variants depends on packaging preference: Tape & Reel format for automated assembly or Cut Tape format for manual assembly and lower volume applications.
Compliance Considerations: All substitute parts maintain ROHS3 compliance and REACH Unaffected status identical to the main part. No additional compliance verification is required for substitution.
Frequently Asked Questions (FAQ)
Q: Can S-8333 series parts directly replace S-8337AADB-T8T1G in existing designs? A: S-8333 series parts are parametrically equivalent across all critical electrical and mechanical specifications. However, they operate at a different switching frequency range (280kHz ~ 1.08MHz versus 257.4kHz ~ 1.134MHz) and lack the Enable control feature present in the main part. Designs that depend on the Enable function or require the specific switching frequency range of the S-8337 must use S-8337ABIA-T8T1U instead.
Q: What is the difference between Tape & Reel and Cut Tape packaging? A: Tape & Reel (TR) packaging is optimized for high-volume automated assembly using pick-and-place equipment. Cut Tape (CT) packaging is supplied in smaller quantities on tape without the reel, suitable for manual assembly, prototyping, or lower-volume production runs. Both formats contain identical components in the same 8-TSSOP package.
Q: Why is S-8337AADB-T8T1G marked as Not For New Designs? A: This designation indicates the part has reached end-of-life status in ABLIC's product portfolio. Active alternatives such as S-8337ABIA-T8T1U (identical specifications) or S-8333 series variants (parametrically equivalent with noted differences) are recommended for new design implementations.
Q: Are all substitute parts ROHS3 compliant? A: Yes. All substitute parts listed maintain ROHS3 compliance and REACH Unaffected status identical to the main part S-8337AADB-T8T1G.
Q: Which substitute part has the highest inventory availability? A: S-8333TCIA-T8T1U has the highest inventory at 1069 pieces, followed by S-8333TCDA-T8T1U at 1053 pieces. For designs requiring the identical control feature set and switching frequency range, S-8337ABIA-T8T1U is available with 760 pieces in stock.
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