MAX17498A/MAX17498B/MAX17498C are peak current-mode converters for flyback/boost applications
The MAX17498A, MAX17498B and MAX17498C are current‑mode fixed‑frequency flyback/boost converters that require a minimum number of external components. They integrate all control circuitry needed for wide‑input‑voltage isolated and non‑isolated power supplies, with EN/UVLO and OVI pins for start‑up control and over‑voltage protection.
The devices are offered in a compact 16‑pin (3 mm × 3 mm) TQFN package and provide features such as programmable soft‑start, programmable current limit, slope compensation, and an open‑drain power‑good (PGOOD) indicator. MAX17498A is optimized for universal offline (85 V AC‑265 V AC) applications, while MAX17498B and MAX17498C target low‑voltage DC‑DC designs.
| Maximum Duty Cycle | 49 % (MAX17498A/C), 92 % (MAX17498B) |
|---|---|
| Input Voltage Range | 4.5 V‑29 V (MAX17498A), 4.5 V‑36 V (MAX17498B/C) |
| EN/UVLO Threshold (Rising) | 1.18 V – 1.28 V |
| OVI Threshold (Rising) | 1.18 V – 1.28 V |
| Package | 16‑pin (3 mm × 3 mm) TQFN |
The MAX17498C is supplied in a 16‑pin TQFN package (3 mm × 3 mm).
EN/UVLO enables the converter to start when the pin voltage exceeds about 1.23 V and also serves as an on/off control pin.