Switching frequency is programmable from 100 kHz to 2.2 MHz via an external resistor. Lower frequencies improve efficiency but need a bigger inductor; higher frequencies shrink the magnetics at the cost of some switching loss. For a 50 mA rail, the inductor is small either way, but the flexibility matters if you're trying to keep the switcher out of a sensitive frequency band. If the board sits near a hot motor or in direct sunlight, this part won't derate early.
MAX17551AUB+ Himalaya Buck Regulator, 4V-60V Input, 50mA
MPNMAX17551AUB+
End of Life
Maxim Integrated Himalaya series, MAX17551AUB+, Step-Down Buck Regulator, Adjustable Output, 50 mA, 4V to 60V Input, 100kHz to 2.2MHz, Surface Mount, 10-uMAX/uSOP, -40°C to 125°C.
$3.0Ref. price · indicative, final on quote
Packaging10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
RoHSROHS3 Compliant
SeriesHimalaya
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Series | Himalaya |
| Output type | Adjustable |
| Mounting | Surface Mount |
| Voltage - input | 60V |
| Voltage - output | 54V |
| Voltage - output (Min (Fixed)) | 0.8V |
| Output current | 50mA |
| Frequency - switching | 100kHz ~ 2.2MHz |
| I/O channels | 1 |
| Operating temperature | -40°C ~ 125°C (TJ) |
| Package | Tube |
| Function | Step-Down |
| Topology | Buck |
| Case | 10-TFSOP, 10-MSOP (0.118\", 3.00mm Width) |
| Output configuration | Positive |
| Synchronous rectifier | Yes |
Product details
Frequently asked questions
What is the maximum output current of MAX17551AUB+?
The maximum output current is 50 mA — sized for auxiliary/sensor rails, not main power.
Is MAX17551AUB+ RoHS compliant?
Yes, it is ROHS3 compliant.