ISL6421AER Intersil, ISL6421AER Datasheet - Page 5

• Manufacturer Part Number: ISL6421AER
• Description: IC REG SGL LNB CONTROL 32-QFN
• Manufacturer: Intersil

Specifications of ISL6421AER

• Applications: Converter, Satellite Set-Top Box Designs
• Voltage - Input: 8 ~ 14 V
• Number Of Outputs: 1
• Voltage - Output: 13 ~ 18 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Electrical Specifications
NOTES:
Functional Pin Description
LINEAR REGULATOR
Drop-out Voltage
DSQIN PIN
DSQIN pin logic Low
DSQIN pin Logic HIGH
DSQIN pin Input Current
CURRENT SENSE
Input Bias Current
Overcurrent Threshold
ERROR AMPLIFIER
Open Loop Voltage Gain
Gain Bandwidth Product
PWM
Maximum Duty Cycle
Minimum Pulse Width
OSCILLATOR
Oscillator Frequency
THERMAL PROTECTION
Thermal Shutdown
Temperature Shutdown Threshold
Temperature Shutdown Hysteresis
3. Internal digital soft-start.
4. Voltage programming signals VSEL and LLC are implemented via the I
5. Guaranteed by design.
IO1 = IO2 = 500mA.
SYMBOL
BYPASS
DSQIN
PGND
SGND
AGND
TCAP
VSW
SDA
SCL
CS
PARAMETER
Bidirectional data from/to I
Clock from I
Input of the linear post-regulator.
Dedicated ground for the output gate driver of the PWM.
Current sense input; connect Rsc at this pin for desired overcurrent value for the PWM.
Small signal ground for the IC.
Analog ground for the IC.
Capacitor for setting rise and fall time of the output of the LNB. Use a capacitor value of 1µF or higher.
Bypass capacitor for internal 5V.
When HIGH this pin enables the internal 22kHz modulation for the LNB, Use this pin for tone enable function for the
LNB.
5
VCC = 12V, T
ENT = L, DCL = L, DSQIN = L, Iout = 12mA, unless otherwise noted. See software description section for I
access to the system. (Continued)
2
C bus.
SYMBOL
I
A
GBP
BIAS
f
OL
o
A
= -20°C to +85°C, unless otherwise noted. Typical values are at T
2
Iout = 450mA (Note 5)
Static current mode, DCL = H
(Note 5)
(Note 5)
(Note 5)
Fixed at (10)(f
(Note 5)
(Note 5)
C bus.
ISL6421A
TEST CONDITIONS
tone
)
2
C bus.
FUNCTION
MIN
325
200
3.5
70
10
90
-
-
-
-
-
-
-
TYP
700
400
220
150
1.2
88
93
20
20
A
1
-
-
-
= 25°C. EN = H, LLC = L,
MAX
1.5V
500
240
-
-
-
-
-
-
-
-
-
-
March 9, 2006
UNITS
MHz
kHz
mV
FN9167.3
µA
nA
dB
°C
°C
ns
%
V
V
V
2
C