AP1522
Step-Up DC/DC Converter
Electrical Characteristics
(T
a
=25
°C
, V
IN
= 5V, V
SHDN
= 5V, unless otherwise noted.)
Symbol
V
IN
V
IN
V
FB
I
FB
Parameter
Minimum Operation Voltage
Maximum Operation Voltage
Feedback Pin Voltage
Feedback Pin Bios Current
Supply Current
F
SW
Duty
I
SW
V
SAT
V
SHDN
V
SHDN
I
SHDN
Switching frequency
PWM Maximum Duty Cycle
Switch Current Limit
Switch V
SAT
Switch Leakage Current
SHDN Pin Voltage High
SHDN Pin Voltage Low
SHDN Pin Bios Current
Conditions
-
-
-
-
Operation current
V
SHDN
= 0V
Min.
2.5
-
1.225
10
-
-
0.75
85
280
-
-
0.6
-
-
Typ.
-
-
1.25
45
2
0.1
1.0
90
320
350
0.1
-
-
10
Max.
-
10
1.275
100
3
1.0
1.25
-
360
-
5
-
0.5
-
Unit
V
V
V
nA
mA
µA
MHz
%
mA
mV
µA
V
V
µA
I
SW
= 250mA
V
SW
= 5V
Enable
Disable
Typical Application Circuit
Vout=10V
C2
4.7uF
R1
70K
R2
10K
D1
L1
10uH
Vin=3.3V
Option
SW
Vss
FB
SHDN
Vin
C1
4.7uF
ON OFF
V
OUT
=V
FB
(1+
R1
)
R2
1K < R2 < 50K
Anachip Corp.
www.anachip.com.tw
3/8
Rev. 1.0
May. 5, 2005
ANACHIP [ ANACHIP CORP ]
