Maxim Integrated MAX1523EUT+T, Step-Up/Step-Down PWM Controller, Topology: Boost, Flyback, SEPIC, 1 Output, Transistor Driver, 85% Duty Cycle, 2.5V to 5.5V Supply, SOT-23-6, -40°C to 85°C.
| Parameter | Value |
|---|---|
| Output type | Transistor Driver |
| Mounting | Surface Mount |
| Voltage - supply (Vcc (Vdd)) | 2.5V ~ 5.5V |
| I/O channels | 1 |
| Output phases | 1 |
| Duty cycle | 85% |
| Operating temperature | -40°C ~ 85°C (TA) |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Function | Step-Up, Step-Up/Step-Down |
| Topology | Boost, Flyback, SEPIC |
| Clock sync | No |
| Case | SOT-23-6 |
| Control features | Enable |
| Output configuration | Positive |
| Synchronous rectifier | No |
The SOT-23-6 package keeps the footprint small, but thermal performance depends on the external MOSFET and diode — those components see the real dissipation.
For volume commitments or BOM freeze planning, this is a stable line — no imminent obsolescence signal.
It is a current-mode PWM controller IC that drives an external transistor in boost, flyback, or SEPIC converters. It regulates the output by modulating the duty cycle of the external switch, with a maximum duty cycle of 85%.
Yes, SEPIC is one of the supported topologies alongside boost and flyback. The controller operates as a transistor driver, so an external coupling capacitor and inductor are needed to implement the SEPIC stage.