AP6503ASP-13 데이터 시트보기 (PDF) - Diodes Incorporated.
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AP6503ASP-13 Datasheet PDF : 15 Pages
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Typical Applications Circuit
100
90
%) 80
CY(
N 70
CIE
EFFI 60
VIN = 5V
VIN = 12V
50
VOUT = 3.3V
L = 10µH
40
0
1
2
3
LOAD CURRENT (A)
Efficiency vs. Load Current
AP6503A
INPUT
C1
22μF
2
IN
1
BST
ON
3
SW
OFF
7 EN AP6503A
5
FB
8
SS
C4
0.1μF
6
COMP
GND
4
C5
10nF
C3
6.8nF
R3
6.8kΩ
L1
10μH
R1
26.1kΩ
R2
10kΩ
OUTPUT
VOUT
3.3V
C2
47μF
Figure 2. Typical Application Circuit
Pin Descriptions
Pin
Number
1
2
3
4
5
6
7
8
EP
Pin
Name
BST
IN
SW
GND
FB
COMP
EN
SS
EP
Function
High-Side Gate Drive Boost Input. BST supplies the drive for the high-side N-Channel MOSFET switch. Connect
a 0.01µF or greater capacitor from SW to BST to power the high-side switch.
Power Input. IN supplies the power to the IC, as well as the step-down converter switches. Drive IN with a 4.75V
to 23V power source. Bypass IN to GND with a suitably large capacitor to eliminate noise on the input to the IC.
See Input Capacitor.
Power Switching Output. SW is the switching node that supplies power to the output. Connect the output LC filter
from SW to the output load. Note that a capacitor is required from SW to BST to power the high-side switch.
Ground (Connect the exposed pad to Pin 4).
Feedback Input. FB senses the output voltage and regulates it. Drive FB with a resistive voltage divider
connected to it from the output voltage. The feedback threshold is 0.925V. See Setting the Output Voltage.
Compensation Node. COMP is used to compensate the regulation control loop. Connect a series RC network
from COMP to GND. In some cases, an additional capacitor from COMP to GND is required. See Compensation
Components.
Enable Input. EN is a digital input that turns the regulator on or off. Drive EN high to turn on the regulator; low to
turn it off. Attach to IN with a 100kΩ pull up resistor for automatic startup.
Soft-Start Control Input. SS controls the soft-start period. Connect a capacitor from SS to GND to set the soft-start
period. A 0.1µF capacitor sets the soft-start period to 15ms. To disable the soft-start feature, leave SS floating.
EP exposed thermal pad connect to Pin 4 GND
AP6503A
Document number: DS36000 Rev. 4 - 2
2 of 15
www.diodes.com
March 2017
© Diodes Incorporated
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