ISL6422 Datasheet, PDF (6/19 Pages) Intersil Corporation – Dual Output LNB Supply and Control Voltage Regulator with I2C Interface for Advanced Satellite Set-Top Box Designs

ISL6422
Electrical Specifications
V_CC = 12V, T_A = -20°C to +85°C, unless otherwise noted. Typical values are at T_A = +25°C. EN1 = EN2 = H,
VTOP1 = VTOP2 = L, ENT1 =
noted. See “ISL6422 Software
ENT2 = L, DCL
Description” on
= L, DSQIN1 = DSQIN2 =
page 12 for I²C access to
L, I_OUT = 12mA, unless otherwise
the system. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Dynamic Output Current Limiting
(Note 8)
I_MAX
DCL = 0, ISEL1H and ISEL2H = 0,
ISEL1L and ISEL2L = 0,
ISEL1R and ISEL2R = 0
270
305
345
mA
DCL = 0, ISEL1H and ISEL2H = 0,
ISEL1L and ISEL2L = 0,
ISEL1R and ISEL2R = 1
350
388
422
mA
DCL = 0, ISEL1H and ISEL2H = 0,
ISEL1L and ISEL2L = 1,
ISEL1R and ISEL2R = 1
515
570
630
mA
DCL = 0, ISEL1H and ISEL2H = 1,
ISEL1L and ISEL2L = 0,
ISEL1R and ISEL2R = 1
635
705
775
mA
DCL = 0, ISEL1H and ISEL2H = 1,
ISEL1L and ISEL2L = 1,
ISEL1R and ISEL2R = 1
800
890
980
mA
Dynamic Overload Protection Off Time TOFF DCL = L, Output Shorted (Note 8)
900
ms
Dynamic Overload Protection On Time
TON
20
ms
Static Output Current Limiting
Cable Fault CABF Asserted High
TONE OSCILLATOR
I_MAX
I_CAB
DCL = 1 (Note 8)
EN1 and EN2 = 1;
990
mA
2
10
20
mA
Tone Frequency
Tone Amplitude
Tone Duty Cycle
Tone Rise or Fall Time
TONE DECODER
f_tone
V_tone
dc_tone
T_r, T_f
ENT1 and ENT2 = H
ENT1 and ENT2 = H, I_OUT = 5mA
ENT1 and ENT2 = H
ENT1 and ENT2 = H
20.0
22.0
24.0
kHz
500
680
800
mV
40
50
60
%
5
10
14
μs
Input Amplitude
Vtdin
200
1000
mV
Frequency Capture Range
Ftdin
17.5
26.5
kHz
Input Impedance
Zdet
8.6
kΩ
Detector Output Voltage
Vtdout_L Tone Present, Iload = 3mA
0.4
V
Detector Output Leakage
Itdout_H Tone absent, Vo = 6V
10
μA
Tone Decoder Rx Threshold
Tone Decoder Tx Threshold
LINEAR REGULATOR
V_RXth
V_TXth
TXT1 and TXT2 = L
TXT1 and TXT2 = H
100
150
200
mV
400
450
500
mV
Drop-out Voltage
I_OUT = 750mA
0.8
1.0
V
Output Backward Leakage Current
I_OBK
EN1 and EN2 = 0; V_OBK = 27V
2.0
3.0
mA
Output Backward Leakage Current
I_OBK
EN1 and EN2 = 0; V_OBK = 28V
15.0
17.0
mA
Output Backward Current Threshold
I_OBKTH EN1 and EN2 = 1; V_OFAULT = 19V (Note 7)
125
mA
Output Backward Voltage
I_OBK
EN1 and EN2 = 0
27
V
Output Under Voltage
(Asserted high during Softstart)
OUVF1/2 bit is asserted high, Measured from -6
the typ. output set value
2
%
Output Over Voltage
(Asserted high during softstart)
OUVF1/2 bit is asserted high, Measured from +2
the typ. output set value
+6
%
6
FN9190.1
April 10, 2007