The FAN5355 is a 3MHz digitally programmable regulator that provides 800mA, 1A, or 1.1A output current. The device features an I2C™-compatible interface, output voltage range of 0.75V to 1.975V, input voltage range of 2.7V to 5.5V, 3MHz fixed-frequency operation, excellent load and line transient response, small size, 1µH inductor solution, ±2% PWM DC voltage accuracy, 35ns minimum on-time, high efficiency, low ripple, light-load PFM, smooth transition between PWM and PFM, and 37µA operating PFM quiescent current. The device is available in a 10-lead MLP (3 x 3mm) or 12-bump CSP package and is suitable for applications such as mobile phones, smart phones, 3G, WiFi®, WiMAX™, and WiBro® data cards, Netbooks®, ultra-mobile PCs, SmartReflex™-compliant power supply, split supply DSPs and µP solutions OMAP™, XSCALE™, mobile graphics processors (NVIDIA®, ATI), and LPDDR2 and memory modules.
The FAN5355 is a high-frequency, ultra-fast transient response, synchronous step-down DC-DC converter optimized for low-power applications using small, low-cost inductors and capacitors. It supports up to 800mA, 1A, or 1.1A load current and is ideal for mobile phones and similar portable applications powered by a single-cell Lithium-ion battery. The device operates at a 3MHz nominal fixed switching frequency using either its internal oscillator or an external SYNC frequency.
| Output Current | 800mA, 1A, or 1.1A |
|---|---|
| Efficiency | 93% |
| Switching Frequency | 3MHz |
| Input Voltage Range | 2.7V to 5.5V |
| Output Voltage Range | 0.75V to 1.975V |
| Operating Temperature | -40°C to +85°C |
| Package Types | 10-lead MLP or 12-bump CSP |
The device supports up to 800mA, 1A, or 1.1A load current.
The regulator operates at a 3MHz nominal fixed switching frequency.
The chip is available in 10-lead MLP (3x3mm) and 12-bump WLCSP packages.