Datasheet

GND
SW
TPS51218
OCP
ZC
XCON
RF
FCCM
VBST
V5IN
PWM
VFB
TRIP
Auto-skip/FCCM
+
+
Delay
0.7 V +10/15%
0.7 V –5/10%
PGOOD
Control Logic
UDG-09065
10 mA
+
+
0.7 V –30%
0.7 V +20%
+
+
EN
Ramp Comp
Enable/SS Control
+
+
+
+
0.7 V
x(-1/8)
x(1/8)
Frequency
Setting
Detector
DRVH
DRVL
t
ON
One-
Shot
Auto-skip
UV
OV
TPS51218
www.ti.com SLUS935B –MAY 2009– REVISED FEBRUARY 2012
FUNCTIONAL BLOCK DIAGRAM
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Product Folder Link(s): TPS51218