
A4402
Constant On-Time Buck Converter
With Integrated Linear Regulator
Power-Up and Power-Down Timing Diagrams
Using ENB
ENB
18 V
Using VIN1
VIN1
V SW
V O2
NPOR
ENB
VIN1
V SW
t ss
t ss
UVLO Rising
UVLO Falling
t por
6V
UVLO Rising
t por
t ss
V O2
NPOR
UVLO Rising
t por
UVLO Falling
UVLO Rising
t por
VPOR
VCTSET
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
6