ADP2386

Data Sheet

Rev. A | Page 6 of 24

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

2

1

3

4

5

6

18

17

16

15

14

13

SW

SW

GND

VREG

FB

COMP

PGND

25

GND

26

SW

SW

BST

PVIN

PVIN

PVIN

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.

ADP2386

TOP VIEW

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

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.