DUAL 1.2A 1.5MHz SYNCHRONOUS BUCK CONVERTER
DESCRIPTION
The UTC UD06122 is a dual high-efficiency
Pulse-Width-Modulated (PWM) step-down DC-DC converter. It is
capable of delivering 1.2A output current over a wide input
voltage range from 2.5V to 6.0V, the UTC UD06122 is ideally
suited for portable electronic devices that are powered from 1-cell
Li-ion battery or from other power sources within the range such
as cellular phones, PDAs and other handheld devices.
Two operational modes are available: PWM/Low-Dropout auto-switch and shutdown modes. Internal
synchronous rectifier with low RDS (ON) dramatically reduces conduction loss at PWM mode. No external Schottky
diode is required in practical application.
The UTC UD06122 enters Low-Dropout mode when normal PWM cannot provide regulated output voltage by
continuously turning on the upper PMOS. The UTC UD06122 enter shutdown mode and consumes less than 0.1μA
when EN pin is pulled low.
The switching ripple is easily smoothed-out by small package filtering elements due to a fixed operation freq
uency of 1.5MHz. Other features include soft start, lower internal reference voltage with 2% accuracy, over t
emperature protection, and over current protection.
FEATURES
* 2.5V~6.0V input voltage range
* Output Adjustable from 0.6V to VIN
* 200/160mΩ Internal Power MOSFET Switch
* Stable with Low ESR Output Ceramic Capacitors
* Up to 95% Efficiency |
