AP1537 ANACHIP [Anachip Corp], AP1537 Datasheet - Page 3

• Manufacturer Part Number: AP1537
• Description: PWM Control 3A Step-Down Converter
• Manufacturer: ANACHIP [Anachip Corp]

PWM Control 3A Step-Down Converter
Anachip Corp.
www.anachip.com.tw
Symbol
∆V
∆V
R
/V
/V
EFFI
f
f
I
V
V
OSC1
V
T
V
I
I
I
OSC
I
DSON
SSS
SW
SH
FB
SL
OUT
OUT
SH
SS
FB
OUT
OUT
SL
IN
V
Electrical Characteristics
Typical Application Circuit
IN
Input Voltage
Feedback Voltage
Feedback Bias Current
Switch Current
Current Consumption
During Power Off
Line Regulation
Load Regulation
Oscillation Frequency
Frequency of Current Limit
or Short Circuit Protect
EN Pin Input Voltage
EN Pin Input Leakage
Current
Soft-Start Time
Internal MOSFET Rdson
Efficiency
22uF
C
IN
L1 Value
Parameter
CVcc
0.1uF
V
OUT
100K
C
0.1uF
R
EN
EN
Vcc
EN
Note: V
I
--
I
Measure waveform at SW pin
--
I
V
V
Measure waveform at SW pin
Evaluate oscillation at SW pin
Evaluate oscillation stop at SW pin
V
--
--
V
V
V
I
OUT
OUT
OUT
OUT
EN
IN
IN
IN
IN
IN
18uH
2.5V
=5V, V
=12V, V
= 5V~18V, I
= 12V
= 12V, V
AP1537
=0.1A
=0.1A
=0V
= 0.1 to 3A
= 3A
(V
R
V
OUT
B
IN
SS
V
=0.7K~5K ohm
IN
= 12V, T
FB
= V
=12V, I
FB
=0V
OUT
Output
Conditions
=0V
Comp
FB
3/7
OUT
FB
= 5V
x (1+R
MAX
a
=25
=0.2A
=3A
°C
A
/R
, unless otherwise specified)
22uH
3.3V
B
)
1K 1800pF
D1
22uH
L1
10nF
C
C
0.784
Min.
400
3.6
3.5
2.0
-10
-10
0.3
40
-
-
-
-
-
-
-
-
1.3K
R
6.8K
R
A
B
+
-
22uH
5V
Typ.
0.1uF
500
110
0.8
0.1
0.2
C
10
70
91
1
2
-
-
-
-
-
-
-
Rev. 1.3
+
-
AP1537
C
33uF
0.816
Max.
600
100
150
OUT
0.5
0.5
0.8
18
10
10
V
2
5
-
-
-
-
-
OUT
May 09, 2006
=5V
Unit
KHz
KHz
mΩ
ms
µA
µA
µA
µA
%
%
%
V
V
A
V