Datasheet

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1
TSD
FB
TPS40222
Soft Start
+
16 pF
+
Oscillator
FB
DC
Bias
5
6
BOOST
4
PVIN
S Q
QR
SW
+
Thermal
Shutdown
References
GND
Current Limit Threshold
3
2
E/A
PWM
Comparator
Composite
Ramp
Boost
Diode
Overcurrent
Comparator
f(I
DRAIN
)
f(I
DRAIN
)
2 MΩ
f(V
OSC
)
I
DRAIN
UDG−04129
AVIN
0.5 V
REF
0.8 V
REF
0.8 V
REF
0.5 V
REF
TPS40222
SLUS642A – OCTOBER 2005 – REVISED JANUARY 2006
SIMPLIFIED BLOCK DIAGRAM
5