ISL6422 Datasheet, PDF (8/19 Pages) Intersil Corporation – Dual Output LNB Supply and Control Voltage Regulator with I2C Interface for Advanced Satellite Set-Top Box Designs

Tone Waveform
ENT1/2
I²C
MSEL1/2
I²C
ISL6422
EXTM1/2
PIN
VOUT1/2
PIN
22kHz
22kHz
22kHz
22kHz
22kHz
22kHz
Internal Tone
Tr = 10µs typ
Internal Tone
Tr = 10µs typ
Tr = 10µs typ
Internal Tone
Returns to nominal V_OUT ~1 period
after the last EXTM rising edge
T > 55µs
NOTES:
9. The logic presented to the signal pins TXT1 and TXT2 changes the decoder threshold during tone Transmit and Receive. TTH1 and TTH2 allow
threshold control through the I²C provided that TXT1 and TXT2 = 0.
10. The tone rise and fall times are not shown due to resolution of graphics. It is 10µs typ for 22kHz.
11. The EXTM1 and EXTM2 pins have input thresholds of V_IL(max) = 0.8V and V_IH(min) = 1.7V
FIGURE 1. TONE WAVEFORM
Typical Performance Curves
0.820
0.810
0.800
0.790
0.780
0
20
40
60
80
TAMB (°C)
FIGURE 2. OUTPUT CURRENT DERATING 38 LD HTSSOP:
I_OUT_max vs TAMB
NOTE: With both channels in simultaneous operation at rated output.
\
0.810
0.760
0.710
0.660
0
20
40
60
80
TAMB (°C)
FIGURE 3. OUTPUT CURRENT DERATING 40 LD 6x6 QFN:
I_OUT_max vs TAMB
8
FN9190.1
April 10, 2007