DESCRIPTION

The UTC L3383 Series are PFM step-up DC/DC switching converter. The UTC L3383 can support both large and small currents. It automatically switches duty ratio (45/75) when it senses changes in load.

Both built-in and external transistor types include 5-pin and 3-pin packages, which are provided with either a CE (chip enable) function that reduces power consumption during shut-down mode, or a VDD pin function (separated power and voltage detect pins).

FEATURES

* Output voltage range: 2.0V~7.0V in 0.1V increments

* Operating (start-up) voltage range: 0.9V~10V

* Highly accurate: Set-up voltage ±2.5

* Maximum oscillator frequency (Max Fosc1): 180kHz (±15)

* Variable Duty Ratio: 45/75 (±5)

* Both switching transistor built-in and external types are available

* 5-lead package offer Chip Enable or independent VOUT pin option.