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AP1538SDPG-13

P1-P3P4-P6P7-P9P10-P12P13-P13
AP1538
18V 3A 300KHz BUCK CONVERTER
AP1538 Rev. 5 4 of 13 OCTOBER 2009
DS31451 www.diodes.com © Diodes Incorporated
Absolute Maximum Ratings
Symbol Parameter Rating Unit
ESD HBM Human Body Model ESD Protection 5.5 KV
ESD MM Machine Model ESD Protection 200 V
V
CC
VCC Pin Voltage V
SS
- 0.3 to V
SS
+ 20 V
V
FB
Feedback Pin Voltage V
SS
- 0.3 to V
CC
V
V
EN
EN Pin Voltage V
SS
- 0.3 to V
CC
V
V
OUT
Switch Pin Voltage V
SS
- 0.3 to V
CC
V
P
D
Power Dissipation Internally limited mW
T
J
Operating Junction Temperature Range -40 to +125
o
C
T
ST
Storage Temperature Range -65 to +150
o
C
Caution: The absolute maximum ratings are rated values exceeding which the product could suffer physical damage.
These values must therefore not be exceeded under any conditions.
Recommended Operating Conditions
Symbol Parameter Min Max Unit
V
IN
Input Voltage (Note 4) 3.6 18 V
I
OUT
Output Current 0 3 A
T
A
Operating Ambient Temperature -20 +85
o
C
Notes: 4. For the operations in low input voltage, AP1538 can tolerate down to 3.6V but max output current loading will be less than 3A. For nominal
applications in such low input voltage range, especially lower than 4V, a higher ROCSET with larger heat sink is recommended.
AP1538
18V 3A 300KHz BUCK CONVERTER
AP1538 Rev. 5 5 of 13 OCTOBER 2009
DS31451 www.diodes.com © Diodes Incorporated
Electrical Characteristics
(V
IN = 12V, T
A
= 25°C, unless otherwise specified)
Symbol Parameter Conditions Min Typ. Max Unit
V
FB
Feedback Voltage I
OUT
= 0.1A 0.784 0.8 0.816 V
I
FB
Feedback Bias Current I
OUT
= 0.1A - 0.1 0.5 µA
I
SHDN
Current Consumption During
Power Off
V
EN
= 0V - 10 - µA
∆V
OUT
/ V
IN
Line Regulation V
IN
= 5V~18V - 1 2 %
∆V
OUT
/ V
OUT
Load Regulation I
OUT
= 0.1 to 3A - 0.2 0.5 %
f
OSC
Oscillation Frequency Measure waveform at SW pin 240 300 400 KHz
f
OSC1
Frequency of Current Limit or
Short Circuit Protection
Measure waveform at SW pin - 50 - KHz
V
IH
EN Pin Input Voltage
Evaluate oscillation at SW pin 2.0 - -
V
V
IL
Evaluate oscillation stop at SW pin - - 0.8
I
SH
EN Pin Input Leakage Current
EN Pin High - 20 - µA
I
SL
EN Pin Low - -10 - µA
I
OCSET
OCSET Pin Bias Current -- 75 90 105 µA
R
DS(ON)
Internal MOSFET R
DS(ON)
V
IN
=5V, V
FB
=0V - 110 -
mΩ
V
IN
=12V, V
FB
=0V - 70 -
EFFI Efficiency
V
IN
=12V, V
OUT
= 5V
I
OUT
=3
A
- 92 - %
T
SHDN
Thermal shutdown threshold - 150 - °C
T
HYS
Thermal shutdown hysteresis - 55 - °C
θ
JC
Thermal Resistance
Junction-to-Case
SOP-8L (Note 5) - 24 -
o
C/W
SOP-8L-DEP (Note 5) - 26 -
Notes: 5. Test condition for SOP-8L and SOP-8L-DEP: Devices mounted on 2oz copper, minimum recommended pad layout on top & bottom layer with
thermal vias, double sided FR-4 PCB.
AP1538
18V 3A 300KHz BUCK CONVERTER
AP1538 Rev. 5 6 of 13 OCTOBER 2009
DS31451 www.diodes.com © Diodes Incorporated
Typical Performance Characteristics
V
IN
vs. Frequency
(V
OUT
= 3.3V, I
OUT
= 0.2A)
306
308
310
312
314
316
318
320
322
324
326
0 2 4 6 8 10 12 14 16 18
V
IN
(V)
F
OSC
(kHz)
V
IN
vs. V
FB
(V
OUT
= 3.3V, I
OUT
= 0.2A)
0.780
0.785
0.790
0.795
0.800
0.805
0.810
0.815
0.820
024681012141618
V
IN
(V)
V
FB
(V)
Line Regulation
(V
OUT
= 3.3V, I
OUT
= 0.2A)
3.00
3.05
3.10
3.15
3.20
3.25
3.30
3.35
3.40
024681012141618
V
IN
(V)
V
OUT
(V)
Load Regulation
(V
IN
= 12V)
3.25
3.26
3.27
3.28
3.29
3.30
3.31
3.32
3.33
3.34
3.35
0.0 0.5 1.0 1.5 2.0 2.5 3.0
I
OUT
(A)
V
OUT
(V)
Efficiency
(V
IN
= 12V)
0
10
20
30
40
50
60
70
80
90
100
0.0 1.0 2.0 3.0
I
OUT
(A)
Efficiency (%)
VOUT=3.3V
VOUT=5V
Switch Current Limit
(T
A
= 25C)
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
0 2 4 6 8 10 12 14 16 18
V
IN
(V)
Current Limit (A)
ROCSET=6.8k
ROCSET=3.9k
P1-P3P4-P6P7-P9P10-P12P13-P13

AP1538SDPG-13

Mfr. #:
Buy AP1538SDPG-13
Manufacturer:
Diodes Incorporated
Description:
Switching Voltage Regulators BUCK CONV 3A PWM CONTROL
Lifecycle:
New from this manufacturer.
Delivery:
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