ADP2386(RevA) データシートの表示（PDF） - Analog Devices
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ADP2386 Datasheet PDF : 24 Pages
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ADP2386
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Data Sheet
COMP 1
FB 2
VREG 3
GND 4
SW 5
SW 6
25
GND
26
SW
18 PVIN
17 PVIN
16 PVIN
15 BST
14 SW
13 PGND
ADP2386
TOP VIEW
NOTES
1. THE EXPOSED GND PAD MUST BE SOLDERED
TO A LARGE, EXTERNAL, COPPER GND PLANE
TO REDUCE THERMAL RESISTANCE.
2. THE EXPOSED SW PAD MUST BE CONNECTED
TO THE SW PINS OF THE ADP2386 BY USING
SHORT, WIDE TRACES, OR ELSE SOLDERED
TO A LARGE, EXTERNAL, COPPER SW PLANE
TO REDUCE THERMAL RESISTANCE.
Figure 3. Pin Configuration
Table 4. Pin Function Descriptions
Pin No.
Mnemonic Description
1
COMP
Error Amplifier Output. Connect an RC network from COMP to GND.
2
FB
Feedback Voltage Sense Input. Connect to a resistor divider from the output voltage, VOUT.
3
VREG
Output of the Internal 8 V Regulator. The control circuits are powered from this voltage. Place a 1 µF,
X7R or X5R ceramic capacitor between this pin and GND.
4
GND
Analog Ground. Return of internal control circuit.
5, 6, 7, 14
SW
Switch Node Output. Connect to the output inductor.
8, 9, 10, 11, 12, 13 PGND
Power Ground. Return of low-side power MOSFET.
15
BST
Supply Rail for the High-Side Gate Drive. Place a 0.1 µF, X7R or X5R capacitor between SW and BST.
16, 17, 18, 19
PVIN
Power Input. Connect to the input power source and connect a bypass capacitor between this pin and PGND.
20
EN
Precision Enable Pin. An external resistor divider can be used to set the turn-on threshold. To enable the
part automatically, connect the EN pin to the PVIN pin.
21
PGOOD
Power-Good Output (Open Drain). A pull-up resistor of 10 kΩ to 100 kΩ is recommended.
22
RT
Frequency Setting. Connect a resistor between RT and GND to program the switching frequency from
200 kHz to 1.4 MHz.
23
SYNC
Synchronization Input. Connect this pin to an external clock to synchronize the switching frequency
within a range from 200 kHz to 1.4 MHz. See the Oscillator section and Synchronization section for
more information.
24
SS
Soft Start Control. Connect a capacitor from SS to GND to program the soft start time. If this pin is open,
the regulator uses the internal soft start time.
25
EP, GND
The exposed GND pad must be soldered to a large, external, copper GND plane to reduce thermal
resistance.
26
EP, SW
The exposed SW pad must be connected to the SW pins of the ADP2386 by using short, wide traces, or
else soldered to a large, external, copper SW plane to reduce thermal resistance.
Rev. A | Page 6 of 24
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