參數(shù)資料
型號(hào)： ISL6421ER-T
廠商： INTERSIL CORP
元件分類： 穩(wěn)壓器
英文描述： Single Output LNB Supply and Control Voltage Regulator with I2C Interface for Advanced Satellite Set-top Box Designs
中文描述： 0.95 A SWITCHING CONTROLLER, 240 kHz SWITCHING FREQ-MAX, PQCC32
封裝： 5 X 5 MM, PLASTIC, MO-220VHHD-2, QFN-32
文件頁(yè)數(shù)： 4/10頁(yè)
文件大?。?/td> 261K
代理商： ISL6421ER-T
4
Absolute Maximum Ratings
Thermal Information
Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . 8.0V to 18.0V
Logic Input Voltage Range (SDA, SCL, ENT) . . . . . . . . -0.5V to 7V
Output Current. . . . . . . . . . . . . . . . . . . .Externally/Internally Limited
Thermal Resistance
QFN Package (Notes 1, 2). . . . . . . . . .
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . 150
o
C
Maximum Storage Temperature Range. . . . . . . . . . -40
o
C to 150
o
C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300
o
C
(SOIC - Lead Tips Only)
NOTE: The device junction temperature should be kept below
150
o
C. Thermal shut-down circuitry turns off the device if junction
temperature exceeds +150
o
C typically.
θ
JA
(
o
C/W)
32
θ
JC
(
o
C/W)
4
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1.
θ
JA
is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See
Tech Brief TB379.
2.
For
θ
JC
, the “case temperature” location is the center of the exposed metal pad on the package underside.
See Tech Brief TB379.
Electrical Specifications
V
CC
= 12V, T
A
= -20
o
C to +85
o
C, unless otherwise noted. Typical values are at T
A
= 25
o
C. EN = H, LLC = L,
ENT = L, DCL = L, DSQIN = L, I
OUT
= 12mA, unless otherwise noted. See software description section for I
2
C
access to the system.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Operating Supply Voltage Range
8
12
14
V
Standby Supply Current
EN = L
-
1.5
3.0
mA
Supply Current
I
IN
EN = LLC = VSEL = ENT = H, No Load
-
4.0
8.0
mA
UNDER VOLTAGE LOCKOUT
Start Threshold
7.5
-
7.95
V
Stop Threshold
7.0
-
7.55
V
Start to Stop Hysteresis
350
400
500
mV
SOFT START
COMP Rise Time (Note 2)
(Note 4)
-
1024
-
Cycles
OUTPUT VOLTAGE
Output Voltage (Note 3)
V
OUT
VSEL = L, LLC = L
12.74
13.0
13.26
V
V
OUT
VSEL = L, LLC = H
13.72
14.0
14.28
V
V
OUT
VSEL = H, LLC = L
17.64
18.0
18.36
V
V
OOU
VSEL = H, LLC = H
18.62
19.0
19.38
V
Line Regulation
DV
OUT
V
IN
= 8V to 14V; V
OUT
= 13V
-
4.0
40.0
mV
V
IN
= 8V to 14V; V
OUT
= 18V
-
4.0
60.0
mV
Load Regulation
DV
OUT
I
O
= 12mA to 450mA
-
50
80
mV
Dynamic Output Current Limiting
I
MAX
DCL = L
575
-
950
mA
Dynamic Overload Protection Off Time
TOFF
DCL = L, Output Shorted (Note 4)
-
900
-
ms
Dynamic Overload Protection On Time
TON
-
20
-
ms
22kHz TONE
Tone Frequency
f
tone
ENT = H
20.0
22.0
24.0
kHz
Tone Amplitude
V
tone
ENT = H
550
680
900
mV
Tone Duty Cycle
dc
tone
ENT = H
40
50
60
%
Tone Rise or Fall Time
T
r
, T
f
ENT = H
5
8
14
μ
s
ISL6421
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