Dual Mobile-Friendly PWM / PFM Controller
   
Description
The FAN5234 PWM controller provides high efficiency and regulation with an adjustable output from 0.9V to 5.5V required to power I/O, chip-sets, memory banks, or peripherals in high-performance notebook computers, PDAs, and internet appliances. Synchronous rectification and hysteretic operation at light loads contribute to a high efficiency over a wide range of loads. The Hysteretic Mode of operation can be disabled if PWM Mode is desired for all load levels. Efficiency is further enhanced by using the MOSFET’s RDS(ON) as a current-sense component.
   
Features
■ Wide Input Voltage Range for Mobile Systems:
    2V to 24V
■ Excellent Dynamic Response with Voltage
    FeedForward and Average-Current-Mode Control
■ Lossless Current Sensing on Low-Side MOSFET or
    Precision Over-Current via Sense Resistor
■ VCC Under-Voltage Lockout
■ Power-Good Signal
■ Light-Load Hysteretic Mode Maximizes Efficiency
■ 300KHz or 600KHz Operation
■ TSSOP16 Package
   
Applications
■ Mobile PC Regulator
■ Handheld PC Power