The PT1205 is a high efficiency synchronous, step-down DC/DC converter. Its input voltage range is from 2.6V to 5.5V and provides an adjustable regulated output voltage from 0.8V to 5V while delivering up to 3A of output current.
The internal synchronous low on-resistance power switches increase efficiency and eliminate the need for an external Schottky diode. The switching frequency is set by an external resistor or can be synchronized to an external clock. The 100% duty cycle provides low dropout operation extending battery life in portable systems. Current mode operation with external compensation allows the transient response to be optimized over a wide range of loads and output capacitors. Forced continuous PWM mode appearing on light load could minimizes ripple voltage and reduces the noise and RF interference.
The PT1205 is available in the DFN -10L 3x3 package.
FEATURES
l High Efficiency: Up to 95%
l Low RDS(ON) Internal Switches : 110m Ω
l Programmable Frequency : 300kHz to 2MHz
l No Schottky Diode Required
l 0.8V Reference Allows for Low Output Voltage
l Forced Continuous Mode Operation
l Low Dropout Operation : 100% Duty Cycle
l RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
l Portable Instruments
l Battery-Powered Equipment
l Notebook Computers
l Distributed Power Systems
l IP Phones
l Digital Cameras
TYPICAL APPLICATION
