The MAX258 is a 500mA, push-pull transformer driver designed to provide a simple solution for isolated power supplies. The IC has an internal oscillator and operates from a single +3.0V to +5.5V supply. The transformer’s secondary-to-primary winding ratio defines the output voltage, allowing selection of virtually any isolated output voltage with galvanic isolation.
The device features an integrated oscillator driving a pair of n-channel power switches. Internal circuitry guarantees a fixed 50% duty cycle to prevent DC current flow through the transformer.
The IC operates with up to 500mA of continuous current and features undervoltage lockout and thermal shutdown.
The IC includes a low-current shutdown mode to reduce the overall supply current to less than 5µA (max) when the driver is disabled.
The MAX258 is available in a small 8-pin (2mm x 3mm) TDFN package and is specified over the -40°C to +125°C temperature range.
|Part Number||VIN |
|Driver Output Resistance |
|Max. IOUT |
|Package/Pins||Oper. Temp. |
|-40 to +125||$1.15 @1k|
|See All Transformer Drivers (6)|
| Pricing Notes: |
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.