Pin descriptions, Functional block diagram – Diodes AP65200 User Manual
Page 2
AP65200
Document number: DS35548 Rev. 6 - 2
2 of 18
January 2014
© Diodes Incorporated
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UC
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AP65200
Pin Descriptions
Pin
Name
Pin Number
Function
SO-8
SO-8EP
MSOP-8EP
U-DFN2626-10
BS 1
2
High-Side Gate Drive Boost Input. BS supplies the drive for the high-side N-Channel MOSFET a
0.01µF or greater capacitor from SW to BS to power the high side switch.
IN 2
3
Power Input. IN supplies the power to the IC, as well as the step-down converter switches. Drive
IN with a 4.7V to 18V power source. Bypass IN to GND with a suitably large capacitor to eliminate
noise on the input to the IC. See Input Capacitor.
SW 3
4
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 BS to
power the high-side switch.
GND 4
5.
6
Ground
FB 5
7
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.
COMP 6
8
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.
EN 7
9
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 EN to IN with a 100kΩ pull up resistor for automatic startup. With this configuration an
internal voltage clamp ensures that a safe voltage is set for Enable not to exceed the absolute
maximum voltage for this pin.
SS 8
10
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.
AGND NA
1 Analog
GND
PAD
Exposed PAD for thermal performance improvement connect to GND
Functional Block Diagram