The FAN2011/FAN2012 is a high-efficiency, low-noise synchronous PWM current mode buck regulator designed for low voltage applications. It features 95% efficiency, adjustable output voltage, 4.5V to 5.5V input voltage range, and up to 1.5A output current.
The FAN2011 and FAN2012 are high‑efficiency, low‑noise synchronous PWM buck regulators designed for low‑voltage applications. They provide up to 1.5 A continuous output from a 4.5 V‑5.5 V input, feature 95 % efficiency, a fixed 1.3 MHz switching frequency, and soft‑start circuitry.
The devices are offered in a 3 × 3 mm 6‑lead MLP package and are suited for hard‑disk drives, set‑top boxes, notebook computers, and other point‑of‑load power applications. The datasheet includes pin assignments, absolute maximum ratings, electrical characteristics, typical performance curves, a block diagram, recommended inductors and capacitors, and PCB layout guidelines.
| Output Current | 1500 mA |
|---|---|
| Input Voltage Range | 4.5 V – 5.5 V |
| Switching Frequency | 1.3 MHz |
| Efficiency | 95 % |
| Package | 3 × 3 mm 6‑lead MLP |
The device operates at a fixed switching frequency of 1.3 MHz.
The output voltage is set with an external resistor divider on the FB pin using an internal 0.8 V reference.
It includes input under‑voltage lockout, short‑circuit protection, thermal shutdown, and a soft‑start circuit.