8

FN9217.3

August 2, 2006

Pin Description

Typical Application

PIN #

PIN

NAME

TYPE

DESCRIPTION

1

VIN

Analog I/O

Supply Voltage/LDO Input:

Connect a 1

μF capacitor to GND.

2

EN1

Low Voltage Compatible

CMOS Input

LDO-1 Enable.

3

EN2

Low Voltage Compatible

CMOS Input

LDO-2 Enable.

4

CBYP

Analog I/O

Reference Bypass Capacitor Pin:

Optionally connect capacitor of value 0.01

μF to 1μF between this pin and GND to tune in the

desired noise and PSRR performance.

5

CPOR

Analog I/O

POR2 Delay Setting Capacitor Pin:

Connect a capacitor between this pin and GND to delay the POR2 output release after LDO-2

output reaches 94% of its specified voltage level. (200ms delay per 0.01

μF).

6

GND

Ground

GND is the connection to system ground. Connect to PCB Ground plane.

7POR1

Open Drain Output (1mA)

Open-drain POR Output for LDO-1 (active-low):

Internally connected to VO1 through 100k

Ω resistor.

8POR2

Open Drain Output (1mA)

Open-drain POR Output for LDO-2 (active-low):

Internally connected to VO2 through 100k

Ω resistor.

9VO2

Analog I/O

LDO-2 Output:

Connect capacitor of value 1

μF to 10μF to GND (1μF recommended).

10

VO1

Analog I/O

LDO-1 Output:

Connect capacitor of value 1

μF to 10μF to GND (1μF recommended).

C1, C4, C5: 1µF X5R ceramic capacitor

C2: 0.1µF X7R ceramic capacitor

ISL9000

VIN

EN1

EN2

CBYP

CPOR

VO1

VO2

POR2

POR1

GND

10

9

8

7

6

1

2

3

4

5

VIN (2.3-6.5V)

Enable 1

Enable 2

Vout 1

Vout 2

Reset 1

Reset 2

C1

C2

C3

C4

C5

C3: 0.01µF X7R ceramic capacitor

OFF

ON

OFF

ON

(200ms delay,

C3 = 0.01µF)

(2ms delay)

Vout 2 too low

Vout 2 OK

Vout 1 too low

Vout 1 OK

ISL9000