ap1534 Diodes, Inc., ap1534 Datasheet - Page 4

• Manufacturer Part Number: ap1534
• Description: Pwm Control 2a Step-down Converter
• Manufacturer: Diodes, Inc.

Electrical Characteristics
Note:
Typical Application Circuit
Note:
AP1534 Rev. 2
Symbol
R
∆V
∆V
I
T
/V
EFFI
I
f
OCSET
T
/ V
f
SHDN
DS(ON)
V
OSC1
I
V
θ
θ
V
I
SHDN
I
OSC
I
V
SW
HYS
SH
FB
SL
OUT
JA
JC
FB
OUT
OUT
IH
IL
IN
IN
3. Test condition for SOP-8L: Device mounted on FR-4 substrate PC board, 2oz copper, with minimum recommended pad layout.
4. Suggested DIODES Power Schottky P/N: B240/B340 series.
For better thermal performance, larger copper pad for heatsink is needed.
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
OCSET Pin Bias Current
Internal MOSFET R
Efficiency
Thermal shutdown threshold
Thermal shutdown
hysteresis
Thermal Resistance
Junction-to-Ambient
Thermal Resistance
Junction-to-Case
C
470uF
IN
CVcc
Parameter
0.1uF
R
5.6K
OCSET
100K
C
R
0.1uF
Option
C
EN
EN
DS(ON)
OCSET
Note: V
Vcc
OCSET
I
V
V
I
Measure waveform at SW pin
Measure waveform at SW pin
Evaluate oscillation at SW pin
Evaluate oscillation stop at SW pin
--
--
--
V
V
V
I
SOP-8L (Note 3)
SOP-8L (Note 3)
I
--
OUT
OUT
OUT
OUT
EN
IN
IN
IN
IN
EN
( V
R
= 5V~18V
= 5V, V
= 12V, V
= 12V, V
B
OUT
= 0V
= 0.1A
= 0.1A
= 0.1 to 2A
= 2A
www.diodes.com
AP1534
IN
=0.7K~5K ohm
= 12V, T
= V
PWM CONTROL 2A STEP-DOWN CONVERTER
4 of 8
FB
FB
Conditions
FB
OUT
V
= 0V
Output
x (1+R
SS
= 0V
A
= 5V
FB
= 25°C, unless otherwise specified )
A
/R
B
)
B240A
(Note 4)
Optional
D1
22uH
L1
C
C
0.784
Min
240
2.0
2.0
75
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
R
R
1.3K
6.8K
A
B
+
-
Typ.
300
160
100
150
127
0.8
0.1
0.2
-10
10
50
20
90
91
55
28
1
-
-
-
C
0.1uF
V
DECEMBER 2007
OUT
©
AP1534
-
+
Diodes Incorporated
0.816
Max
105
400
=5V/2A
0.5
0.5
0.8
C
2
470uF
-
-
-
-
-
-
-
-
-
-
-
-
-
OUT
o
o
Unit
KHz
KHz
mΩ
C/W
C/W
µA
µA
µA
µA
µA
°C
°C
%
%
%
V
V
A