Diodes AP1534 - Manual (Page 2)

AP1534
PWM CONTROL 2A STEP-DOWN CONVERTER
AP1534
Document number: DS31314 Rev. 6 - 2
2 of 9
www.diodes.com
April 2011
© Diodes Incorporated
Pin Descriptions
Pin Name Pin No. Description
FB 1 Feedback pin
EN 2
Power-off pin
H: Normal operation
(Step-down operation)
L: Step-down operation stopped
(All circuits deactivated)
OCSET 3 Add an external resistor to set max output current
V
CC
4 IC power supply pin
Output 5, 6
Switch Pin. Connect external inductor/diode here.
Minimize trace area at this pin to reduce EMI
V
SS
7, 8 GND Pin
Functional Block Diagram
Oscillation
Circuit
Reference Voltage
Source
PWM-Switched
Control Circuit
+
-
Vss V
EN
EN
100uA
OCSET
FB
Vcc
Thermal
Shutdown
Output
Absolute Maximum Ratings
Symbol Parameter Rating Unit
ESD HBM Human Body Model ESD Protection 4.5 KV
ESD MM Machine Model ESD Protection 150 V
V
CC
VCC Pin Voltage V
SS
- 0.3 to V
SS
+ 20 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
V
V
OUT
Switch Pin Voltage V
SS
- 1.0 to V
IN
V
P
D
Power Dissipation Internally limited mW
T
J
Operating Junction Temperature Range -40 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.