Analog Devices MAX643AESA+, Step-Up Boost Regulator, Adjustable Output 1.31V to 18V, 450mA Switch, 50kHz, 8-SOIC, Surface Mount, -40°C to 85°C.
| Parameter | Value |
|---|---|
| Output type | Adjustable (Fixed) |
| Mounting | Surface Mount |
| Voltage - input | 16.5V |
| Voltage - output | 18V (Switch) |
| Voltage - output (Min (Fixed)) | 1.31V (15V) |
| Output current | 450mA (Switch) |
| Frequency - switching | 50kHz |
| I/O channels | 1 |
| Operating temperature | -40°C ~ 85°C (TA) |
| Package | Tube |
| Function | Step-Up |
| Topology | Boost |
| Case | 8-SOIC (0.154\", 3.90mm Width) |
| Output configuration | Positive |
| Synchronous rectifier | No |
The MAX643AESA+ is a step-up (boost) switching regulator from Analog Devices, delivering a positive adjustable output from a low-voltage input. It switches at 50 kHz and can deliver up to 450 mA on the internal switch.
It is ROHS3 compliant, which simplifies compliance for EU and global builds. No last-time-buy risk to plan for on this line.
The switching frequency is 50 kHz. This is a fixed-frequency architecture, not a pulse-skipping or PFM type.
No, it uses an external Schottky diode for the boost rectifier. The internal switch handles the low-side, and the diode provides the output path. This is typical for boost converters in this power range.