參數(shù)資料
型號(hào): ISL6529CR
廠商: INTERSIL CORP
元件分類(lèi): 穩(wěn)壓器
英文描述: Dual Low-Noise High-Drive Operational Amplifier 8-SOIC 0 to 70
中文描述: SWITCHING CONTROLLER, 650 kHz SWITCHING FREQ-MAX, PQCC16
封裝: 5 X 5 MM, PLASTIC, MO-220VHHB, QFN-16
文件頁(yè)數(shù): 17/19頁(yè)
文件大?。?/td> 623K
代理商: ISL6529CR
17
FN9070.5
April 12, 2005
However, if logic-level transistors or transistors with low
V
GS(on)
are used, close attention to layout guidelines should
be exercised, as the low gate threshold could lead to some
shoot-through despite counteracting circuitry present aboard
the ISL6529.
N-Channel MOSFET Transistor Selection
The main criteria for selection of the linear regulator pass
transistor is package selection for efficient removal of heat.
Select a package and heatsink that maintains the junction
temperature below the rating with a maximum expected
ambient temperature.
The power dissipated in the linear regulator is:
where I
O
is the maximum output current and V
OUT
is the
nominal output voltage of the linear regulator.
References
Intersil documents are available on the web at
http://www.intersil.com.
[1] Technical Brief, Intersil Corporation, TB417,
http://www.intersil.com/data/tb/tb417.pdf
ISL6529 Converter Application Circuit
P
LINEAR
I
O
V
IN
V
OUT
(
)
×
(EQ. 18)
FIGURE 17. POWER SUPPLY APPLICATION CIRCUIT FOR A GRAPHICS CONTROLLER
+3.3V
C12
1500
μ
F
47nF
R2
10.7k
5VCC
VOUT2
(1A)
GND
C1
VOUT1
(6A)
DRIVE2
FB2
UGATE
COMP
FB
ISL6529
ISL6529A
R5
4.64k
2.15k
R6
C14
1
μ
F
+5V
C7
1000
μ
F
C6
470
μ
F
C5
1
μ
F
C8
4.7
μ
F
Q1
L1
4.7
μ
H
C9
470
μ
F
C10
1
μ
F
R4
1.0k
R1
1.0k
1.2nF
C2
Q3
L1
L2
MTD3055V
919AS-4R7M
919AS-1R0N
Fairchild
TOKO
TOKO
Q3
12VCC
Q2
PGND
LGATE
+12V
C15
1
μ
F
L2
1
μ
H
6.8k
R12
470pF
C4
47nF
R3
10
C3
Q1, Q2
IRF7313
IR
2.5V
1.6V
R13
1.0k
ISL6529, ISL6529A
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