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參數(shù)資料
| 型號： | ISL6523CB-T |
| 廠商： | INTERSIL CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Label Printer; Leaded Process Compatible:Yes |
| 中文描述： | DUAL SWITCHING CONTROLLER, 215 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | PLASTIC, MS-013AE, SOIC-28 |
| 文件頁數(shù)： | 5/16頁 |
| 文件大?。?/td> | 498K |
| 代理商： | ISL6523CB-T |
5
Typical Performance Curve
Functional Pin Descriptions
VCC (Pin 28)
Provide a 12V bias supply for the IC to this pin. This pin also
provides the gate bias charge for all the MOSFETs
controlled by the IC. The voltage at this pin is monitored for
Power-On Reset (POR) purposes.
GND (Pin 17)
Signal ground for the IC. All voltage levels are measured with
respect to this pin.
PGND (Pin 24)
This is the power ground connection. Tie the synchronous
PWM converter’s lower MOSFET source to this pin.
VAUX (Pin 16)
Connect this pin to the ATX 3.3V output. The voltage present
at this pin is monitored for sequencing purposes. This pin
provides the necessary base bias for the NPN pass
transistors, as well as the current sunk through the 5k
VID
pull-up resistors.
SS13 (Pin 13)
Connect a capacitor from this pin to ground. This capacitor,
along with an internal 28
μ
A current source, sets the
soft-start interval of the synchronous switching converter
(V
OUT1
) and the AGP regulator (V
OUT3
). A VTTPG high
signal is also delayed by the time interval required by the
charging of this capacitor from 0V to 1.25V (see Soft-Start
details).
SS24 (Pin 12)
Connect a capacitor from this pin to ground. This capacitor,
along with an internal 28
μ
A current source, sets the
soft-start interval of the standard buck converter. Pulling this
pin below 0.8V induces a chip reset (POR) and shutdown.
VTTPG (Pin 9)
VTTPG is an open collector output used to indicate the
status of the standard buck regulator output voltage. This pin
is pulled low when the output is below the under-voltage
threshold or when the SS13 pin is below 1.25V.
UGATE1,2 Sink
R
UGATE
I
LGATE
R
LGATE
V
GATE-PHASE
= 1V
VCC = 12V, V
LGATE1
= 1V
V
LGATE
= 1V
-
1.7
3.5
LGATE Source
-
1
-
A
LGATE Sink
-
1.4
3.0
PROTECTION
OCSET1,2 Current Source
I
OCSET
I
SS13,24
V
OCSET
= 4.5V
DC
V
SS13,24
= 2.0V
DC
170
200
230
μ
A
Soft-Start Current
-
28
-
μ
A
POWER GOOD
VSEN1 Upper Threshold
(VSEN1/DACOUT)
VSEN1 Rising
108
-
110
%
VSEN1 Under-Voltage
(VSEN1/DACOUT)
VSEN1 Rising
92
-
94
%
VSEN1 Hysteresis (VSEN1/DACOUT)
VSEN1 Falling
-
2
-
%
PGOOD Voltage Low
V
PGOOD
I
PGOOD
= -4mA
VSEN2 Rising
-
-
0.8
V
VSEN2 Under-Voltage
1.00
V
VSEN2 Hysteresis
VSEN2 Falling
-
60
-
mV
VTTPG Voltage Low
V
VTTPG
I
VTTPG
= -4mA
-
-
0.8
V
NOTE:
2. Guaranteed by design
Electrical Specifications
Recommended Operating Conditions, Unless Otherwise Noted. Refer to Figures 1, 2 and 3
(Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
FIGURE 4. BIAS SUPPLY CURRENT vs FREQUENCY
100
200
300
400
500
600
700
800
900
1000
I
C
SWITCHING FREQUENCY (kHz)
140
120
100
80
60
40
20
0
C = 660pF
C = 1500pF
C = 3600pF
C = 4800pF
C
UGATE1
= C
UGATE2
= C
LGATE1
= C
V
IN
= 5V
V
CC
= 12V
ISL6523
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