AP1534SG-U 查看數據表（PDF） - Diodes Incorporated.
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AP1534SG-U Datasheet PDF : 11 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
Min Typ. Max
VFB Feedback Voltage
IOUT = 0.1A
0.784 0.8 0.816
IFB Feedback Bias Current
IOUT = 0.1A
-
0.1 0.5
ISW Switch Current
--
2.0
-
-
ISHDN
Current Consumption
Power Off
During
VEN
=
0V
-
10
-
∆VOUT
/ VIN
Line Regulation
VIN = 5V~18V
-
1
2
∆VOUT
/VOUT
Load Regulation
IOUT = 0.1 to 2A
-
0.2 0.5
fOSC Oscillation Frequency
Measure waveform at SW pin
240 300 400
fOSC1
Frequency of Current Limit
or Short Circuit Protect
Measure waveform at SW pin
-
50
-
VIH
VIL
EN Pin Input Voltage
Evaluate oscillation at SW pin
2.0
-
-
Evaluate oscillation stop at SW pin -
-
0.8
ISH EN Pin Input Leakage
--
ISL Current
--
-
20
-
-
-10
-
IOCSET OCSET Pin Bias Current --
75
90 105
RDS(ON) Internal MOSFET RDS(ON)
VIN = 5V, VFB = 0V
VIN = 12V, VFB = 0V
-
160
-
-
100
-
EFFI Efficiency
VIN = 12V, VOUT = 5V
IOUT = 2A
-
91
-
TSHDN Thermal shutdown threshold
-
150
-
THYS
Thermal shutdown
hysteresis
-
55
-
θJA
Thermal Resistance
Junction-to-Ambient
SOP-8L (Note 3)
-
127
-
θJC
Thermal Resistance
Junction-to-Case
SOP-8L (Note 3)
-
28
-
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
ROCSET COCSET
5.6K Option
CIN
470uF
CVcc
REN
100K
0.1uF
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. 4
4 of 11
www.diodes.com
SEPTEMBER 2008
© Diodes Incorporated
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