ISL9307
3
FN7931.3
September 20, 2012
Pin Configuration
ISL9307
(16 LD 4X4 TQFN)
TOP VIEW
12
11
10
9
1
2
3
4
VINDCD1
FB1
ENDCD1
ENLDO1
VINDCD2
FB2
ENDCD2
GNDLDO
E-PAD
Pin Descriptions
PIN
NUMBER
(TQFN)
NAME
DESCRIPTION
1
VINDCD1 Input voltage for buck converter DCD1 and power supply pin for all internal digital/ analog circuits.
2
FB1 Feedback pin for DCD1; connect external voltage divider resistors between DCDC1 output, this pin, and ground. For
fixed output versions, connect this pin directly to the DCD1 output.
3
ENDCD1 Enable pin for DCD1. Tie high or low. Do not float.
4
ENLDO1 Enable pin for LDO1. Tie high or low. Do not float.
5
VINLDO Input voltage for LDO1 and LDO2
6
VOLDO1 Output voltage of LDO1
7
VOLDO2 Output voltage of LDO2
8
ENLDO2 Enable pin for LDO2. Tie high or low. Do not float.
9
GNDLDO Power ground for LDO1 and LDO2
10
ENDCD2 Enable pin for DCD2. Tie high or low. Do not float.
11
FB2 Feedback pin for DCD2; connect external voltage divider resistors between DCD2 output, this pin, and ground. For
fixed output versions, connect this pin directly to the DCD2 output.
12
VINDCD2 Input voltage for buck converter DCD2
13
SW2 Switching node for DCD2; connect to one terminal of the inductor.
14
GNDDCD2 Power ground for DCD2
15
GNDDCD1 Power ground for DCD1
16
SW1 Switching node for DCD1; connect to one terminal of the inductor.
E-pad
E-pad Exposed pad; connect to system ground.
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