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IP1201 Datasheet(PDF) 15 Page - International Rectifier

Part # IP1201
Description  Dual Output Full Function 2 Phase Synchronous Buck Power BlockIntegrated Power Semiconductors, PWM Control & Passives
PDF  29 Pages
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Manufacturer  IRF [International Rectifier]
Direct Link  http://www.irf.com
Logo IRF - International Rectifier

IP1201 Datasheet(HTML) 15 Page - International Rectifier

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15
iP1201
Fig. 16: iP1201 Dual Output Simplified Schematic
Overvoltage can be sensed by either connecting
FB1s and FB2s to their corresponding outputs
through separate output voltage divider resistor
networks, or they can be connected directly to their
corrsponding feedback pins FB1 and FB2. For Type
III control loop compensation, FB1s and FB2s
should be connected through separate voltage di-
viders only.
PGOOD
This is an output voltage status signal that is open
collector and is pulled low when the output voltage
falls below 85% of the outout voltage. High state
indicates that outputs are in regulation. There is
only one PGOOD for both outputs. The PGOOD pin
can be left floating if not used.
Thermal Shutdown
The iP1201 provides thermal shutdown. The thresh-
old typically is set to 140°C. When the trip threshold
is exceeded, thermal shutdown turns the outputs
off. Thermal shutdown is not latched and automatic
restart is initiated when the sensed temperature
drops to the normal range.
VIN
SS1
VP-REF
FB1S
FB1
VSW1
HICCUP
CC1
PGOOD
SS2
VREF
ENABLE
RT
SYNC
VSW2
FB2
FB2S
CC2
iP1201
VIN
SS1
VP-REF
FB1S
FB1
VSW1
HICCUP
CC1
PGOOD
SS2
VREF
ENABLE
RT
SYNC
VSW2
FB2
FB2S
CC2
C8
0.1uF
L1
1.0uH
Cout1
470uF
R9
887
R7
1k
C9
0.01uF
R5
4.75k
L2
1.0uH
C11
6800pF
R6
7.15k
C7
0.1uF
R3
30.9k
C10
100pF
R1
100k
R2
100k
0.8V
VOUT1
1.5V
C18
1uF
Cin
100uF
R24
100k
PGND
VIN
R10
2.15k
R8
1k
Cout2
470uF
VOUT2
2.5V
x4
x2
x2



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