MAX1889ETE Maxim Integrated Products, MAX1889ETE Datasheet - Page 26

• Manufacturer Part Number: MAX1889ETE
• Description: DC/DC Switching Converters
• Manufacturer: Maxim Integrated Products

Specifications of MAX1889ETE

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

If the voltage difference is less than 400mV, then the
emitter of the PNP should be connected to a high sup-
ply voltage. The V
stages added to V
connected to the output of the first stage as shown in
Figure 12. For higher efficiency, the first charge-pump
stage can be connected to V
this reduces the power loss.
Triple-Output TFT LCD Power Supply
with Fault Protection
Figure 10. Controlling Power-Up Sequence with External Delay
26
______________________________________________________________________________________
V
-7V
NL
V
N
MAIN
V
P
N
R1
output has two charge-pump
. The emitter of the PNP can be
R2
V
PL
IN
rather than V
C
V
IN
DRVN
GND
FBN
REF
MAIN,
REGULATOR
NEGATIVE
REF
as
V
N
TRANSISTOR COUNT: 2396
PROCESS: BiCMOS
REGULATOR
STEP-UP
MAX1889
REGULATOR
POSITIVE
LX
FB
PGND
DRVP
FBP
Chip Information
V
P
V
+9V
MAIN
V
+20V
PL
V
P