EL7640, EL7641, EL7642
Pin Descriptions
PIN NAME
EL7642
EL7641
1
EL7640
PIN FUNCTION
SRC
1
1
2
Upper reference voltage for switch output
Internal reference bypass terminal
REF
2
2
AGND
PGND
OUT1
NEG1
POS1
OUT2
NEG2
POS2
BGND
POS3
NEG3
OUT3
SUP
3
3
3
Analog ground for boost converter and control circuitry
Power ground for boost switch
4
4
4
5
5
5
Operational amplifier 1 output
6
6
6
Operational amplifier 1 inverting input
Operational amplifier 1 non-inverting input
Operational amplifier 2 output
7
7
7
8
8
-
9
9
-
Operational amplifier 2 inverting input
Operational amplifier 2 non-inverting input
Operational amplifier ground
10
11
12
-
10
11
15
16
17
14
-
-
11
-
Operational amplifier 3 non-inverting input
Operational amplifier 3 inverting input
Operational amplifier 3 output
-
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
-
14
-
Amplifier positive supply rail. Bypass to BGND with 0.1µF capacitor
Operational amplifier 4 non-inverting input
Operational amplifier 4 inverting input
Operational amplifier 4 output
POS4
NEG4
OUT4
POS5
NEG5
OUT5
LX
-
-
-
-
-
-
Operational amplifier 5 non-inverting input
Operational amplifier 5 inverting input
Operational amplifier 5 output
-
-
-
-
21
22
23
24
25
26
27
28
29
30
31
32
21
22
23
24
25
26
27
28
29
30
31
32
Main boost regulator switch connection
Main supply input; bypass to AGND with 1µF capacitor
Main boost feedback voltage connection
Error amplifier compensation pin
IN
FB
COMP
FBP
Positive LDO feedback connection
Positive LDO transistor drive
DRVP
FBN
Negative LDO feedback connection
Negative LDO transistor driver
DRVN
DEL
Connection for switch delay timing capacitor
Input control for switch output
CTL
DRN
Lower reference voltage for switch output
COM
Switch output; when CTL = 1, COM is connected to SRC through a 15Ω
resistor; when CTL = 0, COM is connected to DRN through a 30Ω resistor
FN7415.1
6
September 26, 2005
INTERSIL [ Intersil ]
