ADP5072

Data Sheet

Rev. 0 | Page 6 of 24

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

A

B

C

D

E

PVIN

AVIN

EN2

AGND

COMP2

SW2

PVIN

SYNC

SLEW

FB2

SW1

SW1

SEQ

SS

VREF

PGND

PGND

EN1

FB1

COMP1

1

2

3

4

Figure 2. Pin Configuration (Top View)

Table 5. Pin Function Descriptions

Pin No.

Mnemonic

Description

A1, B2

PVIN

Power Input for the Boost Regulator.

A2

SW2

Switching Node for the Inverting Regulator.

A3, B3

SW1

Switching Node for the Boost Regulator.

A4, B4

PGND

Power Ground for the Boost Regulator.

B1

AVIN

System Power Supply for the ADP5072.

C1

EN2

Inverting Regulator Precision Enable. The EN2 pin is compared to an internal precision reference to enable

the inverting regulator output.

C2

SYNC

Frequency Setting and Synchronization Input. To set the switching frequency to 2.4 MHz, pull the SYNC pin high.

To set the switching frequency to 1.2 MHz, pull the SYNC pin low. To synchronize the switching frequency,

connect the SYNC pin to an external clock.

C3

SEQ

PVIN (the EN1 pin can be used to enable the internal references early, if required). For a sequenced startup, pull the

SEQ pin low. Either EN1 or EN2 can be used, and the corresponding supply is the first in sequence. Hold the

other enable pin low.

C4

EN1

Boost Regulator Precision Enable. The EN1 pin is compared to an internal precision reference to enable the

boost regulator output.

D1

AGND

Analog Ground.

D2

SLEW

Driver Stage Slew Rate Control. The SLEW pin sets the slew rate for the SW1 and SW2 drivers. For the fastest

slew rate (optimal efficiency), leave the SLEW pin open. For normal slew rate, connect the SLEW pin to PVIN.

For the slowest slew rate (optimal noise performance), connect the SLEW pin to AGND.

D3

SS

Soft Start Programming. Leave the SS pin open to obtain the fastest soft start time. To program a slower soft

start time, connect a resistor between the SS pin and AGND.

D4

FB1

Feedback Input for the Boost Regulator. Connect a resistor divider between the positive side of the boost

regulator output capacitor and AGND to program the output voltage.

E1

COMP2

Error Amplifier Compensation for the Inverting Regulator. Connect the compensation network between this

pin and AGND.

E2

FB2

Feedback Input for the Inverting Regulator. Connect a resistor divider between the negative side of the

inverting regulator output capacitor and VREF to program the output voltage.

E3

VREF

Inverting Regulator Reference Output. Connect a 1.0 µF ceramic filter capacitor between the VREF pin and AGND.

E4

COMP1

Error Amplifier Compensation for the Boost Regulator. Connect the compensation network between this pin

and AGND.