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AOZ1083CI LED Driver IC Equivalent & Substitute Parts
Part Overview
The AOZ1083CI is an LED Driver IC from Alpha & Omega Semiconductor Inc., classified as a Power Management (PMIC) component. This device functions as a 1-output DC-DC regulator with step-down (buck) topology, PWM dimming capability, and 1.2A output current rating. The part operates across a 3V to 26V supply voltage range and is housed in a SOT-23-6 surface mount package.
The AOZ1083CI carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for applications utilizing this component.
Substiute Parts
Key Parameters
| Parameter | AOZ1083CI Value |
|---|---|
| Manufacturer | Alpha & Omega Semiconductor Inc. |
| Category | Power Management (PMIC) |
| Type | DC DC Regulator |
| Topology | Step-Down (Buck) |
| Number of Outputs | 1 |
| Voltage - Supply (Min) | 3V |
| Voltage - Supply (Max) | 26V |
| Current - Output / Channel | 1.2A |
| Frequency | 1.5MHz |
| Dimming | PWM |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | SOT-23-6 |
| Internal Switch(s) | Yes |
| RoHS Status | ROHS3 Compliant |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitute parts for the AOZ1083CI are selected based on strict electrical and mechanical compatibility criteria. The following parameters define valid substitution:
Primary Substitution Criteria:
- Topology: Step-Down (Buck) configuration
- Dimming capability: PWM support
- Output configuration: Single output
- Internal switch: Present
- Supply voltage range: Must encompass or overlap the 3V–26V range
- Output current: Minimum 1.2A capability
- Operating temperature: Must support -40°C minimum and 85°C minimum upper range
- RoHS compliance: ROHS3 Compliant
Secondary Considerations:
- Package type: Surface mount preferred for design compatibility
- Frequency: Operational frequency in the 700kHz–1.6MHz range
- Product status: Active status preferred for long-term availability
Substitute parts are grouped into two categories based on topology alignment and current rating compatibility.
Parameter Comparison
| Parameter | AOZ1083CI | AL8860WT-7 | AL8861Y-13 | LM3405AXMY/NOPB | LM3404HVMRX/NOPB | IS31LT3353-STLS4-TR | AP8802HSP-13 |
|---|---|---|---|---|---|---|---|
| Manufacturer | Alpha & Omega | Diodes Inc. | Diodes Inc. | Texas Instruments | Texas Instruments | Lumissil | Diodes Inc. |
| Type | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator |
| Topology | Step-Down (Buck) | Step-Down (Buck) | Step-Down (Buck) | Step-Down (Buck) | Step-Down (Buck) | Step-Down (Buck) | Step-Down (Buck) |
| Number of Outputs | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage - Supply (Min) | 3V | 4.5V | 4.5V | 3V | 6V | 6V | 8V |
| Voltage - Supply (Max) | 26V | 40V | 40V | 22V | 75V | 40V | 60V |
| Current - Output / Channel | 1.2A | 1A | 1.5A | 1A | 1A | 1A | 1A (Switch) |
| Frequency | 1.5MHz | 1MHz | 1MHz | 1.6MHz | 1MHz | 1MHz | 700kHz |
| Dimming | PWM | Analog, PWM | Analog, PWM | PWM | PWM | Analog, PWM | Analog, PWM |
| Operating Temperature (Min) | -40°C | -40°C | -40°C | -40°C | -40°C | -40°C | -40°C |
| Operating Temperature (Max) | 85°C | 105°C | 85°C | 125°C | 125°C | 125°C | 125°C |
| Package / Case | SOT-23-6 | SOT-23-5 Thin (TSOT-25) | SOT-89-5 | 8-HVSSOP | 8-PowerSOIC | SOT-23-5 | 8-SOIC Exposed Pad |
| Internal Switch(s) | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
Primary Substitutes (Highest Compatibility):
AL8861Y-13 (Diodes Incorporated) and LM3405AXMY/NOPB (Texas Instruments) are the preferred substitutes. Both maintain step-down buck topology, PWM dimming, single output configuration, and active product status. AL8861Y-13 provides 1.5A output current, exceeding the AOZ1083CI requirement. LM3405AXMY/NOPB matches the 3V minimum supply voltage of the original part. Both are ROHS3 compliant and carry unlimited or extended moisture sensitivity ratings.
Secondary Substitutes (Conditional Compatibility):
AL8860WT-7 (Diodes Incorporated) operates at 4.5V minimum supply voltage, requiring circuit redesign if 3V operation is critical. IS31LT3353-STLS4-TR (Lumissil Microsystems) and AP8802HSP-13 (Diodes Incorporated) meet topology and dimming requirements but operate at 6V and 8V minimum supply voltages respectively. These are suitable only for applications where minimum supply voltage exceeds these thresholds.
LM3404HVMRX/NOPB (Texas Instruments) supports extended supply voltage to 75V and carries automotive qualification (AEC-Q100), making it suitable for automotive lighting applications where the original part was deployed.
Compliance Considerations:
All substitute parts maintain ROHS3 compliance and EAR99 export classification, matching the original part's regulatory status. Parts with automotive qualification (LM3404HVMRX/NOPB, A6217KLJTR-1-T, A8513KLYTR-3-T) are suitable for automotive-grade applications.
Frequently Asked Questions (FAQ)
Q: Can AL8860WT-7 replace AOZ1083CI in all applications?
A: AL8860WT-7 is compatible for applications where the minimum supply voltage is 4.5V or higher. If your circuit operates at 3V, this substitute is not suitable. The part supports PWM dimming and provides 1A output current, which is below the AOZ1083CI's 1.2A rating.
Q: What is the key difference between AL8860WT-7 and AL8861Y-13?
A: Both are Diodes Incorporated step-down buck LED drivers with PWM dimming. AL8861Y-13 provides 1.5A output current versus AL8860WT-7's 1A, and operates in SOT-89-5 package versus TSOT-25. AL8861Y-13 is preferred for higher current applications.
Q: Why is LM3405AXMY/NOPB recommended as a primary substitute?
A: LM3405AXMY/NOPB matches the AOZ1083CI's 3V minimum supply voltage, operates across a compatible voltage range (3V–22V), and provides 1A output current. It maintains PWM dimming, step-down topology, and active product status. The part is ROHS3 compliant with unlimited moisture sensitivity.
Q: Are there package compatibility concerns when substituting?
A: Yes. The AOZ1083CI uses SOT-23-6 packaging. Substitutes use different packages: AL8860WT-7 (TSOT-25), AL8861Y-13 (SOT-89-5), LM3405AXMY/NOPB (8-HVSSOP), and LM3404HVMRX/NOPB (8-PowerSOIC). PCB layout and footprint redesign is required for any substitute.
Q: Can I use LM3404HVMRX/NOPB in automotive applications?
A: Yes. LM3404HVMRX/NOPB carries AEC-Q100 automotive qualification and supports extended supply voltage to 75V. It is suitable for automotive lighting applications and provides 1A output current with PWM dimming.
Q: What is the minimum supply voltage requirement for each substitute?
A: AOZ1083CI: 3V; LM3405AXMY/NOPB: 3V; AL8860WT-7: 4.5V; AL8861Y-13: 4.5V; IS31LT3353-STLS4-TR: 6V; LM3404HVMRX/NOPB: 6V; AP8802HSP-13: 8V.
Q: Do all substitutes support PWM dimming?
A: Yes. All listed substitutes support PWM dimming. AL8860WT-7, AL8861Y-13, IS31LT3353-STLS4-TR, and AP8802HSP-13 additionally support analog dimming, providing greater flexibility.
Q: Which substitute has the highest output current rating?
A: AL8861Y-13 provides 1.5A output current, the highest among the listed substitutes. This exceeds the AOZ1083CI's 1.2A rating.
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