參數(shù)資料
型號： ISL6522IVZ
廠商： INTERSIL CORP
元件分類： 穩(wěn)壓器
英文描述： Buck and Synchronous Rectifier Pulse-Width Modulator (PWM) Controller
中文描述： SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO14
封裝： ROHS COMPLIANT, PLASTIC, MO-153-AC, TSSOP-14
文件頁數(shù)： 4/14頁
文件大?。?/td> 473K
代理商： ISL6522IVZ
4
FN9030.7
March 4, 2005
Functional Pin Descriptions
RT
This pin provides oscillator switching frequency adjustment.
By placing a resistor (R
T
) from this pin to GND, the nominal
200kHz switching frequency is increased according to the
following equation:
Conversely, connecting a pull-up resistor (R
T
) from this pin
to V
CC
reduces the switching frequency according to the
following equation:
Upper Gate Sink
R
UGATE
ISL6522C, I
LGATE
= 0.3A
-
5.5
10
ISL6522I, I
LGATE
= 0.3A
-
5.5
7.2
Lower Gate Source
I
LGATE
V
CC
= 12V, V
LGATE
= 6V
300
450
-
mA
Lower Gate Sink
R
LGATE
ISL6522C, I
LGATE
= 0.3A
-
3.5
6.5
ISL6522I, I
LGATE
= 0.3A
-
3.5
4.5
PROTECTION
OCSET Current Source
I
OCSET
V
OCSET
= 4.5VDC
170
200
230
μ
A
Soft-Start Current
I
SS
-
10
-
μ
A
Electrical Specifications
Recommended Operating Conditions, Unless Otherwise Noted
(Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Typical Performance Curves
FIGURE 1. R
T
RESISTANCE vs FREQUENCY
FIGURE 2. BIAS SUPPLY CURRENT vs FREQUENCY
10
100
1000
SWITCHING FREQUENCY (kHz)
R
)
10
100
1000
R
T
PULLUP
TO +12V
R
T
PULLDOWN
TO V
SS
100
200
300
400
500
600
700
800
900
1000
80
70
60
50
40
30
20
10
0
I
V
SWITCHING FREQUENCY (kHz)
C
GATE
= 1000pF
C
GATE
= 3300pF
C
GATE
= 10pF
8
9
10
11
12
13
14
7
6
5
4
3
2
1
OCSET
SS
EN
COMP
FB
RT
VCC
LGATE
PGND
BOOT
UGATE
PHASE
GND
PVCC
SOIC
and
TSSOP
QFN
1
3
4
15
SS
COMP
FB
EN
N
O
R
V
16
14
13
2
12
10
9
11
6
5
7
8
PVCC
LGATE
PGND
BOOT
N
G
P
U
GND
Fs
200kHz
------------------
6
T
+
≈
(R
T
to GND)
Fs
200kHz
------------------
7
T
–
≈
(R
T
to 12V)
ISL6522
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