EL7581IREZ Intersil, EL7581IREZ Datasheet - Page 13
EL7581IREZ
Manufacturer Part Number
EL7581IREZ
Description
IC CONV DC/DC 3-CHAN 20-HTSSOP
Manufacturer
Intersil
Datasheet
1.EL7581IREZ.pdf
(17 pages)
Specifications of EL7581IREZ
Applications
Converter, TFT, LCD
Voltage - Input
2.7 ~ 14 V
Number Of Outputs
2
Voltage - Output
5 ~ 17 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
20-TSSOP Exposed Pad, 20-eTSSOP, 20-HTSSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
EL7581IREZ
Manufacturer:
INTERSIL
Quantity:
20 000
Part Number:
EL7581IREZ-T13
Manufacturer:
INTERSIL
Quantity:
20 000
Positive Charge Pump Design Considerations
A single stage charge pump is shown above. The maximum V
where:
• R
If additional stage is required, the LX switching signal is
recommended to drive the additional charge pump diodes.
The drive impedance at the LX switching is typically 150mΩ.
The figure on the next page illustrates an implementation for
two-stage positive charge pump circuit.
V
ON
voltage levels. For 12V supply, R
6V supply, R
V
ONN
OFF
(
max
5V to
and R
17V
)
≤
2
×
R
ON
ONP
21
V
R
C
3.3µF
DDCPP
22
OUT2
is typically 45Ω.
resistance values depend on the V
0.1µF
C
V
(1.32V)
- I
CPN
REF
OUT
13
×
V
DRVN
V
FBN
DDN
2
SSN
R
R
×
ON
ONP
ONN
(
R
ONN
is typically 33Ω. For
+
R
+
-
ONP
R
) - 2
ON
is 30 - 40Ω for V
DDP
×
V
DIODE
EL7581
ON
OSC
- I
output voltage is determined by the following equation:
OUT
DD
6V to 17V
×
------------------------------------------- -
0.5
×
F
S
1
×
C
+
-
CPP
+
-
- I
V
R
R
FBP
OUT
ONP
ONN
DRVP
V
V
FBP
DDP
SSP
×
----------------------------------------------- -
0.5
×
F
S
1
×
C
0.1µF
OUT1
R
12
C
CPP
R
11
C
2.2µF
OUT1
5V to
17V
V
ON