UCC3585 Not Recommended for New Designs
SLUS304F -JULY 1999 -REVISED JANUARY 2005
FEATURES
D VOUT Resistor Programmable Down to 0.9 V
D 3.3-V or 5.0-V Input Supply
D 1% DC Accuracy
D High Efficiency Synchronous Switching
D Drives P-Channel (High Side) and N-Channel DESCRIPTION
The UCC3585 synchronous buck controller
provides flexible high efficiency power conversion
for output voltages as low as 0.9 V with ensured
В±1% dc accuracy. With an input voltage range of
3.0 V to 5.5 V, it is the ideal choice for 3.3 V only,
5.0 V only, or other low voltage systems. The fixed
frequency oscillator is capable of providing
practical PWM operation to 500 kHz. (Low Side) MOSFETs
Lossless Programmable Current Limit
Logic Compatible Shutdown D
D The UCC3585 drives a complementary pair of
power MOSFET transistors. A P-channel on the
high side, and an N-channel on the low side step
down the input voltage at up to 90% efficiency. APPLICATIONS …
