EL7584IR Intersil, EL7584IR Datasheet - Page 11

• Manufacturer Part Number: EL7584IR
• Description: IC DC-DC CONVERTER 4CH 24-TSSOP
• Manufacturer: Intersil

Specifications of EL7584IR

• Applications: Converter, TFT, LCD
• Voltage - Input: 2 ~ 14 V
• Number Of Outputs: 2
• Voltage - Output: 5 ~ 17 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Single Stage Charge Pump
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 below illustrates an implementation for two-stage
positive charge pump circuit.
V
ON
ON
voltage levels. For 12V supply, R
6V supply, R
V
ONN
OFF
(
output voltage is determined by the following equation:
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
- I
CPN
REF
OUT
11
×
V
DRVN
V
FBN
DDN
2
SSN
R
R
×
ON
ONP
ONN
(
R
ONN
is typically 33Ω. For
+
R
+
-
ONP
R
ON
) - 2
IS 30 - 40Ω FOR V
DDP
×
V
DIODE
EL7584
OSC
- I
OUT
DD
6V TO 12V
×
------------------------------------------- -
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
C
CPP
R
R
12
11
February 4, 2005
C
2.2µF
OUT1
FN7317.2
5V TO
17V
V
ON