max5052/5053 is a controller for designing wide-input-voltage isolated and nonisolated power supplies
The MAX5052 and MAX5053 are current‑mode PWM controllers designed for universal‑input isolated and non‑isolated power‑supply applications. The MAX5052 supports rectified 85 VAC to 265 VAC input, while the MAX5053 is suited for low‑input 10.8 V to 24 V supplies. Both devices feature an internal error amplifier, programmable UVLO, digital soft‑start and thermal shutdown.
The datasheet provides detailed electrical characteristics, pin descriptions, typical operating curves, and package information for the 8‑pin UMAX package. It also includes design guidance for startup, bootstrap UVLO operation, and duty‑cycle selection.
| Switching Frequency | 262 kHz ±12 % |
|---|---|
| Output Power | 50 W |
| Input Voltage Range (MAX5052) | Rectified 85 VAC to 265 VAC |
| Input Voltage Range (MAX5053) | 10.8 V to 24 V |
| Maximum Duty Cycle (MAX5052A/MAX5053A) | 50 % |
| Maximum Duty Cycle (MAX5052B/MAX5053B) | 75 % |
| Thermal Shutdown Temperature | 130 °C |
| Startup Supply Current (typ) | 45 µA |
| Operating Supply Current (typ) | 1.4 mA |
The devices operate at a fixed 262 kHz switching frequency with ±12 % accuracy.
MAX5052A and MAX5053A are limited to 50 % duty cycle, while MAX5052B and MAX5053B can operate up to 75 % duty cycle.
The MAX5052 accepts a universal offline input voltage from rectified 85 VAC to 265 VAC.
Thermal shutdown is triggered when the junction temperature exceeds 130 °C.