Data Sheet

ADP5600

Rev. 0 | Page 7 of 25

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

Figure 3. Pin Configuration

Table 7. Pin Function Descriptions

Pin No.

Mnemonic

Description

1

VIN

Power Input. Connect Pin 1 to the input power source and connect a 10 µF bypass capacitor between Pin 1 and GND.

2

EN

Precision Enable Pin. Pull EN high to enable the ADP5600 and pull EN low to disable ADP5600. The EN pin has

an internal pull-down resistor to GND to prevent operation if EN is left floating.

3

SYNC

Synchronization Input (SYNC). Connect this pin to an external clock with a range of 180 kHz to 2.2 MHz, to

period of time, then the internal clock frequency determined by the FREQ pin is used instead of the external

clock connected to the SYNC pin. See the Oscillator and Synchronization sections for more information. Do not

leave the SYNC pin floating. If Pin 3 is not used, short SYNC to GND.

4

FREQ

Frequency Setting. Connect a resistor between FREQ and GND to program the oscillator frequency between

100 kHz and 1.0 MHz. If FREQ is shorted to GND, the charge pump switching frequency is programmed to 1 MHz

(typical). Do not leave this pin floating.

5

PGOOD

Power-Good Output (Open Drain). A pull-up resistor of 10 kΩ to 100 kΩ is recommended. When not used, this

pin can be left floating or connected to GND.

6

FB

Feedback Voltage Sense Input. For fixed output voltages, short FB to LDO_OUT. For adjustable mode, connect

an external resistor divider between LDO_OUT and GND through the FB pin to set the output voltage.

7

LDO_OUT

Output of the LDO. Connect a 2.2 μF or greater capacitor from LDO_OUT to GND.

9

C2−

C2 Flying Capacitor Negative Terminal.

10

C2+

C2 Flying Capacitor Positive Terminal.

8, 11

CPOUT

Inverting Charge Pump Output. Connect CPOUT to the exposed pad. Connect a 10 μF or greater capacitor

from CPOUT to GND.

12

C1+

C1 Flying Capacitor Positive Terminal.

13

C1−

C1 Flying Capacitor Negative Terminal.

14

SEL2

Output Voltage Selector 2. Short SEL2 to GND or leave floating to select one of four LDO_OUT voltage options.

15

SEL1

Output Voltage Selector 1. Short SEL1 to GND or leave floating to select one of four LDO_OUT voltage options.

16

GND

Ground.

EP

Exposed Pad. It is recommended that the exposed pad connect to the CPOUT plane on the board.

12

11

10

1

3

4

9

2

ADP5600

TOP VIEW

VIN

EN

SYNC

FREQ

C1+

CPOUT

NOTES

1. EXPOSED PAD. IT IS RECOMMENDED

THAT THE EXPOSED PAD CONNECT TO

THE CPOUT PLANE ON THE BOARD.

C2+

C2–