150KHZ 3A PWM BUCK DC/DC CONVERTER
FSP3122
BLOCK DIAGRAM
SD
5
1
VIN
220mV
220mV
Current
1.235V
2.5V
Regulator
Source
Reference
bias
Start up
+
Comp -
-
Comp +
+
Frequency
compensation
Amp
-
C- omp
+
Pre-driver
3A
Sw itch
FB
4
2
3
OUTPUT
GND
Thermal
Limit
150KHz
OSC.
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
Paramrter
Supply Voltage
ON/OFF Pin input Voltage
Feedback Pin Voltage
Output Voltage to Ground
Power Dissipation
Storage Temperature
Operating Temperature
Operating Voltage
Rating
Unit
V
V
V
V
W
℃
℃
V
+45
-0.3 to +25
-0.3 to +25
-1
VSD
VFB
VOUT
PD
TST
Internally Limited
-65 to +150
-40 to +125
+4.5 to +40
TOP
VOP
2007-6-12
2/10
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