EL7520ILZ 查看數據表（PDF） - Intersil
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EL7520ILZ Datasheet PDF : 18 Pages
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EL7520, EL7520A
Typical Application
VIN
C10
0.1µF
NODE 1
LX
Q1
NODE 1 L1 6.8µH
D1
1000pF
R0
C0
500kΩ
10µFx2
C1
Q2
PG
ISIN
DRVB
C7
VDDP
FBB
R6
10Ω
C6
0.1µF
CDELAY DELB
ISAD
CINT
VDD
R20
200K
C23 2.2nF
R13
R7
10K
VREF
C41 0.1µF
4.7µF
0.1µF C22
EN
VREF
7K
DRVP
Q11
R16
20K
R12
FBP
20K 230K C15
R11
1µF
R43
R23
C3
10µF
Q3
62.5K
R2
R1
7.5K
R9 C16
C2 1MΩ 0.01µF
10µF
C9
0.1µF
R8
10K
LX
C13
0.1µF
C11
0.1µF
C14 D12
0.1µF
C12 D11
0.1µF
C24 0.1µF
LX
500Ω
Q31
R42
VLGC
2.5V C31 10µF
21.7K 20K
R41
DRVL
FBL
SGND
3K
DRVN
R22
FBN
20K 104K
R21
PGND
Q21
C25 D21
0.1µF
C20
4.7µF
VREF
12V
VBOOST
20V
VON
-8V
VOFF
Applications Information
The EL7520 and EL7520A provide a multiple output power
supply solution for TFT-LCD applications. The system
consists of a high efficiency boost controller and three low
cost linear-regulator controllers (VON, VOFF, and VLOGIC).
The block diagram of the whole part is shown in Figure 24.
Table 1 lists the recommended components.
TABLE 1. RECOMMENDED COMPONENTS
DESIGNATION
DESCRIPTION
C1, C2, C3, C31 10µF, 16V, X7R ceramic capacitor (1206)
TDK C3216X7R1C106M
C20
4.7µF, 16V X5R ceramic capacitor (1206)
TDK C3216X5R1A475K
C15
1µF, 25V X7R ceramic capacitor (1206)
TDK C3216X7R1E105K
D1
1A 20V low leakage schottky rectifier (CASE
457-04) ON SEMI MBRM120ET3
D11, D12, D21 200mA 30V schottky barrier diode (SOT-23)
Fairchild BAT54S
L1
6.8mH 1.3A inductor
TDK SLF6025T-6R8M1R3-PF
TABLE 1. RECOMMENDED COMPONENTS (Continued)
DESIGNATION
DESCRIPTION
Q1
-2.4 -20V P-channel 1.8V specified
PowerTrench MOSFET (SuperSOT-3)
Fairchild FDN304P
Q2
6.3A 30V single N-channel logic level
PowerTrench MOSFET (SOT-23)
Fairchild FDC655AN
Q3
-2A –30V single P-channel logic level
PowerTrench MOSFET (SuperSOT-3)
Fairchild FDN360P
Q11
200mA 40V PNP amplifier (SOT-23)
Fairchild MMBT3906
Q21
200mA 40V NPN amplifier (SOT-23)
Fairchild MMBT3904
Q31
1A 30V PNP low saturation amplifier (SOT-23)
Fairchild FMMT549
9
FN7318.0
July 12, 2005
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