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FAN5354MPX Equivalent & Substitute Parts
Part Overview
The FAN5354MPX is a buck switching regulator IC from onsemi, designed for positive adjustable output applications with a maximum output current of 3A. This component operates across an input voltage range of 2.7V to 5.5V and provides adjustable output voltage from 0.8V to 2V. The device features synchronous rectification and operates at a switching frequency of 3MHz.
The FAN5354MPX is classified as obsolete. Identifying suitable substitute components is necessary to maintain design continuity and ensure availability for new production runs or system updates.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Function | Step-Down (Buck) |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 2.7V |
| Voltage - Input (Max) | 5.5V |
| Voltage - Output (Min/Fixed) | 0.8V |
| Voltage - Output (Max) | 2V |
| Current - Output | 3A |
| Frequency - Switching | 3MHz |
| Synchronous Rectifier | Yes |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| Package / Case | 12-WFDFN Exposed Pad |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the FAN5354MPX is determined by the following critical parameters:
- Topology: Buck (step-down) switching regulator
- Output Configuration: Positive adjustable or programmable output
- Current Rating: 3A output current capability
- Input Voltage Range: Minimum 2.7V to maximum 5.5V
- Output Voltage Range: Minimum 0.8V to maximum 2V
- Synchronous Rectification: Required
- Operating Temperature Range: -40°C to 85°C
- Mounting Type: Surface Mount
The FAN53526UC00X qualifies as a substitute based on compatibility across these parameters. While the FAN53526UC00X features a programmable output type (versus adjustable) and operates at a slightly lower switching frequency (2.4MHz versus 3MHz), it maintains functional equivalence for buck regulation applications requiring 3A output current within the specified voltage and temperature ranges.
Parameter Comparison
| Parameter | FAN5354MPX | FAN53526UC00X |
|---|---|---|
| Manufacturer | onsemi | Fairchild Semiconductor |
| Function | Step-Down | Step-Down |
| Output Configuration | Positive | Positive |
| Output Type | Adjustable | Programmable |
| Number of Outputs | 1 | 1 |
| Voltage - Input (Min) | 2.7V | 2.5V |
| Voltage - Input (Max) | 5.5V | 5.5V |
| Voltage - Output (Min/Fixed) | 0.8V | 0.6V |
| Voltage - Output (Max) | 2V | 0.6V |
| Current - Output | 3A | 3A |
| Frequency - Switching | 3MHz | 2.4MHz |
| Synchronous Rectifier | Yes | Yes |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 12-WFDFN Exposed Pad | 15-UFBGA, WLCSP |
| Product Status | Obsolete | Active |
| RoHS Status | ROHS3 Compliant | Not specified |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
The FAN53526UC00X is available as an active product with current inventory, addressing the obsolescence status of the FAN5354MPX. Both components maintain REACH Unaffected status and EAR99 ECCN classification.
Key considerations for selection:
- Product Availability: The FAN53526UC00X is active with 32,300 units in stock, compared to the FAN5354MPX obsolete status with 4,233 units remaining.
- Compliance: Both components meet ROHS3 requirements and maintain MSL Level 1 (Unlimited) moisture sensitivity ratings.
- Package Transition: The FAN53526UC00X uses a 15-UFBGA, WLCSP package versus the 12-WFDFN Exposed Pad package of the FAN5354MPX. PCB layout and footprint redesign is required.
- Output Voltage Configuration: The FAN53526UC00X provides programmable output at 0.6V fixed, whereas the FAN5354MPX offers adjustable output from 0.8V to 2V. Application requirements must align with the fixed output voltage of the substitute.
Frequently Asked Questions (FAQ)
Q: Can the FAN53526UC00X directly replace the FAN5354MPX without PCB modifications?
A: No. The FAN53526UC00X uses a 15-UFBGA, WLCSP package while the FAN5354MPX uses a 12-WFDFN Exposed Pad package. PCB footprint and layout redesign is required.
Q: What is the primary difference in output voltage capability between these parts?
A: The FAN5354MPX provides adjustable output voltage from 0.8V to 2V, allowing design flexibility. The FAN53526UC00X provides a fixed programmable output at 0.6V. Applications requiring output voltages above 0.6V or variable output must use the FAN5354MPX or identify alternative substitutes.
Q: Are both components RoHS compliant?
A: The FAN5354MPX is ROHS3 Compliant. RoHS compliance status for the FAN53526UC00X is not specified in the provided data.
Q: What is the switching frequency difference and does it affect circuit design?
A: The FAN5354MPX operates at 3MHz while the FAN53526UC00X operates at 2.4MHz. This 0.6MHz difference may affect output filter design, EMI characteristics, and thermal performance. Circuit validation is necessary for the specific application.
Q: Do both components support synchronous rectification?
A: Yes. Both the FAN5354MPX and FAN53526UC00X include synchronous rectifier functionality.
Q: What is the input voltage range compatibility?
A: Both components accept input voltages from 2.5V to 5.5V minimum to maximum. The FAN5354MPX specifies a minimum of 2.7V, while the FAN53526UC00X specifies 2.5V, providing slightly broader input range coverage.
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