Datasheet

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1.5V
FB COMP
+
+
-
15k
SEN
MODE
SENP
15k
Translator
C
OUT
Low
Voltage
Output
R
LO
R
HI
+
-
Converter Power Stage
Soft
start
To current
comparator
Error
Amplifier
To
V
DD
To
GATE
RTN, COM, RSN
Part of TPS23750
RSP
C
BYP
ToPWM
Comparator
TPS23750
TPS23770
SLVS590B – JULY 2005 – REVISED FEBRUARY 2008
be used at voltages above V
DD
, but within their recommended voltage range with respect to V
SS
. SENP draws
about 22.5 µ A of current, while the SEN pin draws less than 1 µ A. The SENP current can cause a small offset in
the output voltage if connected to the center tap of an output voltage divider. If necessary, the offset can be
minimized or compensated. The following example shows a method of creating a voltage greater than V
DD
for a
telecom application that requires a voltage greater than battery ground.
Figure 35. Buck-Boost Configuration Example
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