ISL98607

1. Overview

FN8421 Rev.1.00

Page 4 of 29

Jun.3.19

1.3

Pin Configurations

1.4

Pin Descriptions

20 Bump, 4x5 ARRAY, 0.4mm Pitch WLCSP

Top View

20 Ld 3x4 TQFN

Top View

Pin Number

(WLCSP)

Pin Number

(TQFN)

Pin Name

Description

A1, B1

15, 16

PGND

Power ground for the boost converter.

A2, E1

11, 18

DNC

Do not connect to external circuitry. This pin should be left floating.

A3, A4

19, 20

VP

VP Output. Connect a 10µF capacitor to ground.The VP pins must always be shorted together on

the PCB.

B2

17

LXP

Switch node for boost converter. Connect an inductor between the VIN and LXP pins for boost

converter operation.

B3

1

VBST

Boost Converter Output. The boost converter output supplies the power to the negative charge

pump and LDO. Connect a 10µF capacitor to ground.

B4

2

VBSTCP

Charge pump input. This pin must be connected to VBST on the PCB, so that the boost regulator

provides the input voltage supply for the charge pump.

C1

14

AGND

Analog ground.

C2

12

ENN

VBST and VN enable input. Note, this pin has 200kΩ (typical) pull-down to AGND.

C3

9

ENP

VBST and VP enable input. Note, this pin has 200kΩ (typical) pull-down to AGND.

C4

3

CP

Charge pump positive connection. Place a capacitor between CP and CN to create the VN

voltage.

D1

13

VIN

Input Supply. Connect a 10µF capacitor to ground.

D2

10

SDA

Serial Data Connection for the I2C Interface.

D3

8

SCL

Serial Clock Connection for the I2C Interface.

D4

4

PGND

Power ground for the negative charge pump.

E2

7

VSUB

Substrate connection. VSUB must be the most negative potential on the IC, connect VSUB to VN.

E3

6

VN

Negative charge pump output. Connect a 10µF capacitor to ground. Connecting two 10µF

capacitors to ground lowers the negative charge pump output voltage ripple.

E4

5

CN

Charge pump negative connection. Place a capacitor between CP and CN to generate the VN

voltage.

N/A

-

Thermal

Pad

Connect to ground plane on PCB to maximize the thermal performance.

A1

A2

A3

A4

B1

B2

B3

B4

C1

C2

C3

C4

D1

D2

D3

D4

E1

E2

E3

E4

19

VBST

VBSTCP

CP

PGND

20

18

17

14

12

11

13

8

79

10

AGND

VIN

ENN

DNC

1

3

2

6

4

5

CN

VN

15 PGND

16 PGND

Thermal Pad