User Manual

AP1609
PWM/PFM DUAL MODE STEP-UP DC/DC CONVERTER
AP1609 Rev. 2 3 of 9 FEBRUARY 2009
www.diodes.com © Diodes Incorporated
Block Diagram
Phase
Compensation
Vref with
CE
+
-
PWM/PFM
Controller
+
-
Ramp Wave
Generator,
OSC
Buffer,
Driver
FB
CE
PGND
LX
PWM
Comparator
GND
Vcc
Absolute Maximum Ratings
Symbol Parameter Ratings Units
V
CC
V
IN
Pin Voltage -0.3 ~ 7 V
V
FB
FB Pin Voltage -0.3 ~ V
CC
+0.3 V
V
CE
CE Pin Voltage -0.3 ~ V
CC
+0.3 V
V
SW
Switch Voltage (LX to GND) -0.3 ~ 18 V
I
LX
Switch Current -3 ~ 0.2 A
P
D
Continuous Total Power Dissipation 1200 mW
T
OPR
Operating Ambient Temperature -20 ~ +80
o
C
T
STG
Storage Temperature -20 ~ +125
o
C