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ISL6421 Datasheet(PDF) 5 Page - Intersil Corporation

Part No. ISL6421
Description  Single Output LNB Supply and Control Voltage Regulator with I2C Interface for Advanced Satellite Set-top Box Designs
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Maker  INTERSIL [Intersil Corporation]
Homepage  http://www.intersil.com/cda/home
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ISL6421 Datasheet(HTML) 5 Page - Intersil Corporation

 
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5
LINEAR REGULATOR
Drop-out Voltage
Iout = 450mA (Note 4)
-
1.2
-
V
DSQIN PIN
DSQIN pin logic Low
-
-
1.5V
V
DSQIN pin Logic HIGH
3.5
-
-
V
DSQIN pin Input Current
-1-
µA
CURRENT SENSE
Current Limiting Threshold (max. input)
150
200
250
mV
Input Bias Current
IBIAS
-
700
-
nA
Over Current Threshold
Static current mode, DCL = H
325
400
500
mV
ERROR AMPLIFIER
Open Loop Voltage Gain
AOL
(Note 4)
70
88
-
dB
Gain Bandwidth Product
GBP
(Note 4)
10
-
-
MHz
PWM
Maximum Duty Cycle
90
93
-
%
Minimum Pulse Width
(Note 4)
-
20
-
ns
OSCILLATOR
Oscillator Frequency
fo
Fixed at (10)(ftone)
200
220
240
kHz
THERMAL PROTECTION
Thermal Shutdown
Temperature Shutdown Threshold
(Note 4)
-
150
-
Temperature Shutdown Hysteresis
(Note 4)
-
20
-
NOTES:
3. Internal Digital Soft-start
4. Voltage programming signals VSEL and LLC are implemented via the I2C bus.
IO = 450mA.
5. Guaranteed by Design.
Electrical Specifications
VCC = 12V, TA = -20oC to +85oC, unless otherwise noted. Typical values are at TA = 25oC. EN = H, LLC = L,
ENT = L, DCL = L, DSQIN = L, IOUT = 12mA, unless otherwise noted. See software description section for I2C
access to the system. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
ISL6421


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