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EL7581 Datasheet(PDF) 4 Page - Intersil Corporation

Part No. EL7581
Description  3-Channel DC/DC Converter
Download  17 Pages
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Maker  INTERSIL [Intersil Corporation]
Homepage  http://www.intersil.com/cda/home
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EL7581 Datasheet(HTML) 4 Page - Intersil Corporation

 
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Pin Descriptions I = Input, O = Output, S = Supply
PIN NUMBER
PIN NAME
PIN TYPE
PIN FUNCTION
1
VSSB
S
Ground for DC/DC boost and reference circuits; chip substrate
2
SS
I
Soft-start input; the capacitor connected to this pin sets the current limited start time
3
FBB
I
Voltage feedback input for boost circuit; determines boost output voltage, VBOOST
4
VDDB
S
Positive supply input for DC/DC boost circuits
5
LX
O
Boost regulator inductor drive connected to drain of internal NFET
6
LX
O
Boost regulator inductor drive connected to drain of internal NFET
7
LX
O
Boost regulator inductor drive connected to drain of internal NFET
8
DRVN
O
Driver output for the external generation of negative charge pump voltage, VOFF
9
VDDN
S
Positive supply for input for VOFF generator
10
FBN
I
Voltage feedback input to determine negative charge pump output, VOFF
11
VSSP
S
Negative supply pin for both the positive and negative charge pumps
12
FBP
I
Voltage feedback to determine positive charge pump output, VON
13
VDDP
S
Positive supply input for VON generator
14
DRVP
O
Voltage driver output for the external generation of positive charge pump, VON
15
PGND
O
Power ground, connected to source of internal NFET
16
PGND
O
Power ground, connected to source of internal NFET
17
VREF
I
Voltage reference for charge pump circuits; decouple to ground
18
ENBN
I
Enable pin for boost (VBOOST generation) and negative charge pump (VOFF generation);
active high
19
ENP
I
Enable for DRVP (VON generation); active high
20
ROSC
I
Connected to an external resistor to ground; sets the switching frequency of the DC/DC boost
EL7581


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