參數(shù)資料
型號： ISL6535IRZ
廠商： INTERSIL CORP
元件分類： 穩(wěn)壓器
英文描述： Synchronous Buck Pulse-Width Modulator (PWM) Controller
中文描述： SWITCHING CONTROLLER, 1500 kHz SWITCHING FREQ-MAX, PQCC16
封裝： 4 X 4 MM, ROHS COMPLIANT, PLASTIC, MO-220VGGC, MLFP-16
文件頁數(shù)： 5/14頁
文件大?。?/td> 397K
代理商： ISL6535IRZ
5
FN9255.0
January 17, 2006
Functional Pin Description (SOIC/QFN)
RT (Pin 1/14)
This pin provides oscillator switching frequency adjustment.
By placing a resistor (R
RT
) from this pin to GND, the
switching frequency is set from between 200kHz and
1.5MHz according to the following equation:
.
Alternately ISL6535’s switching frequency can be lowered
from 200kHz to 50kHz by connecting the RT pin with a
resistor to VCC according to the following equation:
REFERENCE
Reference Voltage
T
J
= 0
°
C to 70
°
C
0.591
0.597
0.603
V
T
J
= -40
°
C to 85
°
C
0.588
0.597
0.606
V
System Accuracy
T
J
= 0
°
C to 70
°
C
-1.0
-
1.0
%
T
J
= -40
°
C to 85
°
C
-1.5
-
1.5
%
REFIN Current Source (QFN Only)
-4
-6
-8
μ
A
REFIN Threshold (QFN Only)
2.10
-
3.50
V
REFIN Offset (QFN Only)
-3
-
3
mV
GATE DRIVERS
Upper Drive Source Current
I
U_SOURCE
V
BOOT
- V
PHASE
= 12V, 3nF Load - GBD
-
1.25
-
A
Upper Drive Source Impedance
R
U_SOURCE
90mA Source Current
-
2.0
-
Upper Drive Sink Current
I
U_SINK
V
BOOT
- V
PHASE
= 12V, 3nF Load- GBD
-
2
-
A
Upper Drive Sink Impedance
R
U_SINK
90mA Source Current
-
1.3
-
Lower Drive Source Current
I
L_SOURCE
V
PVCC
= 12V, 3nF Load - GBD
-
2
-
A
Lower Drive Source Impedance
R
L_SOURCE
90mA Source Current
-
1.3
-
Lower Drive Sink Current
I
L_SINK
V
PVCC
= 12V, 3nF Load - GBD
-
3
-
A
Lower Drive Sink Impedance
R
L_SINK
90mA Source Current
-
0.94
-
SSDONE (QFN ONLY)
SSDONE Low Output Voltage
I
SSDONE
= 2mA
0.30
V
Electrical Specifications
Recommended Operating Conditions, unless otherwise noted specifications in
bold
are valid for process,
temperature, and line operating conditions.
(Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Typical Performance Curves
FIGURE 1. R
RT
RESISTANCE vs FREQUENCY
FIGURE 2. BIAS SUPPLY CURRENT vs FREQUENCY
10
100
1000
SWITCHING FREQUENCY (kHz)
R
)
10
100
1000
R
RT
PULLUP
TO +12V
R
RT
PULLDOWN
TO GND
100
200
300
400
500
600
700
800
900
1000
80
70
60
50
40
30
20
10
0
I
P
SWITCHING FREQUENCY (kHz)
C
GATE
= 1000pF
C
GATE
= 3300pF
C
GATE
= 10pF
R
RT
k
[
]
s
200 kHz
[
]
-----------------------–
1.3k
–
≈
(R
RT
to GND)
R
RT
k
[
]
s
]
----------------------------–
70k
+
≈
(R
RT
to VCC)
ISL6535
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