ISL6421A_15 Datasheet, PDF (4/12 Pages) Intersil Corporation – Single Output LNB Supply and Control Voltage Regulator with I2C Interface for Advanced Satellite Set-top Box Designs

ISL6421A
Absolute Maximum Ratings
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 Information
Thermal Resistance (Notes 1, 2)
θ_JA (°C/W) θ_JC (°C/W)
QFN Package. . . . . . . . . . . . . . . . . . . .
35
6
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 150°C
Maximum Storage Temperature Range . . . . . . . . . . . -40°C to 150°C
For recommended soldering conditions, see Tech Brief TB389.
NOTE: The device junction temperature should be kept below
150°C. Thermal shut-down circuitry turns off the device if junction
temperature exceeds +150°C typically.
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 temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications
VCC = 12V, T_A = -20°C to +85°C, unless otherwise noted. Typical values are at T_A = 25°C. 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.
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
UNDERVOLTAGE LOCKOUT
I_IN
EN = LLC = VSEL = ENT = H, No Load
-
4.0
8.0
mA
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 3)
(Note 5)
-
1024
-
Cycles
OUTPUT VOLTAGE
Output Voltage (Note 4)
Line Regulation
Load Regulation
Dynamic Output Current Limiting
Dynamic Overload Protection Off Time
Dynamic Overload Protection On Time
Output Backward Current
22kHz TONE
V_OUT
V_OUT
V_OUT
V_OOU
DV_OUT
DV_OUT
I_MAX
T_OFF
T_ON
I_OBK
VSEL = L, LLC = L
VSEL = L, LLC = H
VSEL = H, LLC = L
VSEL = H, LLC = H
V_IN = 8V to 14V; V_OUT = 13V
V_IN = 8V to 14V; V_OUT = 18V
I_O = 12mA to 450mA
DCL = L
DCL = L, Output Shorted (Note 5)
EN = 0; V_OBK = 24V
12.74 13.0 13.26
V
13.72 14.0 14.28
V
17.64 18.0 18.36
V
18.62 19.0 19.38
V
-
4.0
40.0
mV
-
4.0
60.0
mV
-
50
80
mV
500
-
625
mA
-
900
-
ms
-
20
-
ms
-
2.0
3.0
mA
Tone Frequency
Tone Amplitude
Tone Duty Cycle
Tone Rise or Fall Time
f_tone
V_tone
dc_tone
T_r, T_f
ENT = H
ENT = H
ENT = H
ENT = H
20.0
22.0
24.0
kHz
500
680
900
mV
40
50
60
%
5
8
14
µs
4
FN9167.3
March 9, 2006