參數(shù)資料
型號(hào)： ISL6420
廠商： Intersil Corporation
英文描述： Quadruple 2-Input Positive-AND Gates 14-SOIC -40 to 85
中文描述： 高級(jí)單同步降壓脈寬調(diào)制（PWM）控制器
文件頁數(shù)： 11/19頁
文件大?。?/td> 525K
代理商： ISL6420
11
FN9151.4
July 18, 2005
VMSET/MODE -
This pin is a dual function pin. Tie this pin to
VCC5 to disable voltage margining. When not tied to VCC5,
this pin serves as VMSET. Connect a resistor from this pin to
ground to set the delta for voltage margining. If voltage
margining and external reference tracking mode are not
needed, this pin can be tied directly to ground.
GPIO2
- This is general purpose IO pin for voltage
margining. Refer to Table 2.
TABLE 2. VOLTAGE MARGINING CONTROLLED BY
GPIO1/REFIN AND GPIO2
GPIO1/REFIN
GPIO2
VOUT
L
L
No Change
L
H
+ Delta VOUT
H
L
- Delta VOUT
H
H
Ignored
TABLE 3. VOLTAGE MARGINING/DDR OR TRACKING SUPPLY PIN CONFIGURATION
FUNCTION/MODES
PIN CONFIGURATIONS
COMMENTS
VMSET/MODE
REFOUT
GPIO1/REFIN
GPIO2
Enable Voltage
Margining
Pin Connected to GND
with resistor. It is used
as VMSET.
Connect a 1μF
capacitor for bypass of
external reference.
Serves as a general
purpose I/O. Refer to
Table 2
Serves as a general
purpose I/O. Refer to
Table 2
REFIN or REFOUT
functions will not be
available in this mode.
The internal 0.6V
reference is used.
No Voltage Margining.
Normal operation using
internal reference.
REFOUT not used.
Pin Connected to GND
with resistor. It is used
as VMSET
Connect a 1μF
capacitor for bypass of
external reference.
L
L
No Voltage Margining.
Normal operation with
internal reference.
Buffered V
REFOUT
=
0.6V.
H
Connect a 2.2μF
capacitor to GND.
H (Note 2)
L
No Voltage Margining.
External reference.
Buffered V
REFOUT
=
V
REFIN
H
Connect a 2.2μF
capacitor to GND.
Connect to an external
reference voltage
source (0.6V to 1.25V)
L
NOTES:
1. The GPIO1/REFIN and GPIO2 pins cannot be left floating.
2. Ensure that GPIO1/REFIN is tied high prior to the logic change at VMSET/MODE.
ISL6420
相關(guān)PDF資料
PDF描述
ISL6420IA Quadruple 2-Input Positive-AND Gates 14-SSOP -40 to 85
ISL6420IR Quadruple 2-Input Positive-AND Gates 14-SSOP -40 to 85
ISL6420IR-T Advanced Single Synchronous Buck Pulse-Width Modulation (PWM) Controller
ISL6421AERZ-T Single Output LNB Supply and Control Voltage Regulator with I2C Interface for Advanced Satellite Set-top Box Designs
ISL6421AER-T Single Output LNB Supply and Control Voltage Regulator with I2C Interface for Advanced Satellite Set-top Box Designs
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