AP1538 DIODES [Diodes Incorporated], AP1538 Datasheet - Page 3

• Manufacturer Part Number: AP1538
• Description: 18V 3A 300KHz BUCK CONVERTER
• Manufacturer: DIODES [Diodes Incorporated]

Block Diagram
Absolute Maximum Ratings
Caution: The absolute maximum ratings are rated values exceeding which the product could suffer physical damage.
Recommended Operating Conditions
Notes:
AP1538 Rev. 2
ESD HBM
Symbol
ESD MM
Symbol
I
V
V
OUT
T
V
V
V
T
P
T
IN
OUT
These values must therefore not be exceeded under any conditions.
A
CC
EN
ST
FB
4. For the operations in low input voltage, AP1538 can tolerate down to 3.6V but max output current loading will be less than 3A. For nominal
D
J
applications in such low input voltage range, especially lower than 4V, a higher ROCSET with larger heat sink is recommended.
Vcc
Human Body Model ESD Protection
Machine Model ESD Protection
V
Feedback Pin Voltage
EN Pin Voltage
Switch Pin Voltage
Power Dissipation
Operating Junction Temperature Range
Storage Temperature Range
Input Voltage (Note 4)
Output Current
Operating Ambient Temperature
CC
Pin Voltage
Shutdown
Thermal
Parameter
Parameter
Output
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3 of 14
EN
Oscillation
Circuit
PWM-Switched
Control Circuit
V
EN
18V 3A 300KHz BUCK CONVERTER
OCSET
Source with Soft Start
90uA
Reference Voltage
V
Min
3.6
-20
0
SS
Internally limited
V
V
V
- 0.3 to V
SS
SS
SS
-40 to +125
-65 to +150
- 0.3 to V
- 0.3 to V
- 0.3 to V
Rating
+
-
450
7
Max
+85
SS
18
3
+ 20
CC
CC
CC
©
AP1538
Diodes Incorporated
JUNE 2008
FB
Vss
Unit
o
Unit
mW
V
A
C
KV
o
o
V
V
V
V
V
C
C