Datasheet

TPS62040
TPS62042, TPS62043
TPS62044, TPS62046
SLVS463B − JUNE 2003 − REVISED OCTOBER 2005
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5
FUNCTIONAL BLOCK DIAGRAM
FB PGND
SW
VIN
EN
Undervoltage
Lockout
Bias supply
Control Logic
+
−
LoadComparator
1.25 MHz
Oscillator
Vref = 0.5 V
Driver
Shoot−thru
Logic
P−Channel
Power MOSFET
N−Channel
Power MOSFET
R1
R2
Soft
Start
+
−
+
−
Current limit Comparator
SkipComparator
Gm
Saw Tooth
Generator
V
I
+
−
Vcomp
S
R
+
−
Comp High
Comp Low
Comp Low 2
Comp High
Comp Low
Comp Low 2
−
+
Comparator
Compensation
Ref
Ref
PGND
VIN
GNDMODE
MODE
SW
For the Adjustable Version the FB Pin Is
Directly Connected to the Gm Amplifier