Ap2004, Block diagram, Absolute maximum ratings – Diodes AP2004 User Manual
Page 3: Recommended operating conditions, Pwm buck controller
AP2004
PWM BUCK CONTROLLER
AP2004 Rev. 3
3 of 8
FEBRUARY 2009
©
Diodes Incorporated
Block Diagram
Bandgap
Reference
OUT
PWM Amplifier
FB
VCC
SCP
CT
Error Amplifier
COMP
UVLO
GND
0.7V
1.5V
+
-
2.5V
Internal use
1.25V
Iss
+
-
VCC
Oscillator
MAX.300KHz
SS
+
+
-
Absolute Maximum Ratings
Symbol
Parameter
Rating
Unit
P
D
Power dissipation at 25
°C
600 mW
V
CC
Supply voltage
28
V
V
I
Amplifier input voltage
20
V
V
O
Collector output voltage
V
CC
-1.0V
V
I
SOURCE
Source current
200 mA
I
SINK
Sink current
200 mA
T
OP
Operating junction temperature range
-20 to +125
o
C
T
ST
Storage temperature range
-65 to +150
o
C
Recommended Operating Conditions
Symbol
Parameter
Min
Max
Unit
V
CC
Supply
voltage
3.6
27
V
V
I
Amplifier
input
voltage
1.05 1.45 V
V
O
Collector
output
voltage
Vcc-1.5 V
I
FB
Current into feedback terminal
45
µA
R
F
Feedback
resistor
100
k
Ω
C
T
Timing
capacitor
100 6800 pF
F
OSC
Oscillator
frequency
10
300 KHz