No AEC-Q100 mark in the record, but the temp range alone tells you it is not a commercial-grade indoor-only part.
For volume BOMs or blanket orders, the RFQ process locks in allocation and lead time.
MAX17559ACJ+ Buck Controller IC, 4.5V–60V, 32-TQFP
MPNMAX17559ACJ+
End of Life
Analog Devices MAX17559ACJ+, Step-Down Buck Controller, 2 Outputs, 2 Phases, Transistor Driver, 4.5V to 60V Input, 100kHz to 2.2MHz Switching, Synchronous Rectifier, -40°C to 125°C, 32-TQFP (7x7), Surface Mount, Tray.
$8.87Ref. price · indicative, final on quote
Packaging32-TQFP
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Output type | Transistor Driver |
| Mounting | Surface Mount |
| Voltage - supply (Vcc (Vdd)) | 4.5V ~ 60V |
| Frequency - switching | 100kHz ~ 2.2MHz |
| I/O channels | 2 |
| Output phases | 2 |
| Operating temperature | -40°C ~ 125°C (TJ) |
| Package | Tray |
| Function | Step-Down |
| Topology | Buck |
| Clock sync | No |
| Case | 32-TQFP |
| Control features | Current Limit, Enable, Frequency Control, Power Good, Soft Start |
| Output configuration | Positive |
| Synchronous rectifier | Yes |
Product details
Frequently asked questions
How do I set the switching frequency on MAX17559ACJ+?
The switching frequency is adjustable from 100kHz to 2.2MHz via the Frequency Control pin. A resistor from that pin to ground sets the oscillator timing — the datasheet provides the resistor-value table for the target frequency.