AP1534 データシートの表示（PDF） - Diodes Incorporated.
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AP1534 Datasheet PDF : 10 Pages
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AP1534
PWM CONTROL 2A STEP-DOWN CONVERTER
Electrical Characteristics (VIN = 12V, TA = 25°C, unless otherwise specified)
Symbol
Parameter
Conditions
VFB
IFB
ISW
ISHDN
Feedback Voltage
IOUT = 0.1A
Feedback Bias Current
IOUT = 0.1A
Switch Current
--
Current Consumption
Power Off
During
VEN
=
0V
∆VOUT
/ VIN
∆VOUT
/VOUT
fOSC
fOSC1
Line Regulation
Load Regulation
Oscillation Frequency
Frequency of Current Limit
or Short Circuit Protect
VIN = 5V~18V
IOUT = 0.1 to 2A
Measure waveform at SW pin
Measure waveform at SW pin
VIH
VIL
ISH
ISL
IOCSET
RDS(ON)
EFFI
TSHDN
THYS
EN Pin Input Voltage
Evaluate oscillation at SW pin
Evaluate oscillation stop at SW pin
EN Pin Input Leakage
--
Current
--
OCSET Pin Bias Current --
Internal MOSFET RDS(ON)
VIN = 5V, VFB = 0V
VIN = 12V, VFB = 0V
Efficiency
VIN = 12V, VOUT = 5V
IOUT = 2A
Thermal shutdown threshold
Thermal shutdown
hysteresis
θJA
Thermal Resistance
Junction-to-Ambient
SOP-8L (Note 3)
θJC
Thermal Resistance
Junction-to-Case
SOP-8L (Note 3)
Min
0.784
-
2.0
-
-
-
240
-
2.0
-
-
-
75
-
-
-
-
-
-
-
Typ.
0.8
0.1
-
10
1
0.2
300
50
-
-
20
-10
90
160
100
91
150
55
127
28
Max
0.816
0.5
-
-
2
0.5
400
-
-
0.8
-
-
105
-
-
-
-
-
-
-
Notes: 3. Test condition for SOP-8L: Device mounted on FR-4 substrate PC board, 2oz copper, with minimum recommended pad layout.
For better thermal performance, larger copper pad for heatsink is needed.
Unit
V
µA
A
µA
%
%
KHz
KHz
V
µA
µA
µA
mΩ
%
°C
°C
oC/W
oC/W
Typical Application Circuit
V IN
Vcc
Output
R OCSET COCSET
5.6K Option
CIN
470uF
CVcc
0.1uF
REN
100K
CEN
0.1uF
AP1534
OCSET
FB
EN
VSS
22uH
L1
CC
Optional
D1
B240A
(Note 4)
VOUT =5V/2A
RA
6.8K
+
-
RB
1.3K
+
C
0.1uF-
COUT
470uF
Notes:
Note: VOUT = VFB x (1+RA /RB)
RB =0.7K~5K ohm
4. Suggested DIODES Power Schottky P/N: B240/B340 series.
AP1534 Rev. 5
4 of 10
www.diodes.com
FEBRUARY 2009
© Diodes Incorporated
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