Diodes AP1520 - Manual (Page 3)

AP1520
PWM CONTROL 2A STEP-DOWN CONVERTER
AP1520 Rev. 5 3 of 9 JULY 2009
DS31174 www.diodes.com © Diodes Incorporated
Block Diagram
Oscillation
Circuit
Reference Voltage
Source with Soft Start
PWM-Switched
Control Circuit
+
-
Vss V
EN
EN
100uA
OCSET
FB
V
cc
Thermal
Shutdown
Output
Absolute Maximum Ratings
Symbol Parameter Rating Unit
V
CC
V
CC
Pin Voltage V
SS
- 0.3 to V
SS
+ 25 V
V
FB
Feedback Pin Voltage V
SS
- 0.3 to V
CC
V
V
EN
EN Pin Voltage V
SS
- 0.3 to V
IN
+ 0.3 V
V
OUT
Switch Pin Voltage V
SS
- 0.3 to V
IN
+ 0.3 V
P
D
Power Dissipation Internally limited mW
T
OP
Operating Junction Temperature Range -20 to +125 o C
T
ST
Storage Temperature Range -65 to +150 o C
Caution: The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must
therefore not be exceeded under any conditions.
Recommended Operating Conditions
Symbol Parameter Min Max Unit
V
IN
Input Voltage 4 23 V
I
OUT
Output Current 0 1.8 A
T
A
Operating Ambient Temperature -25 85 o C