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ISL6422 Datasheet, PDF (14/19 Pages) Intersil Corporation – Dual Output LNB Supply and Control Voltage Regulator with I2C Interface for Advanced Satellite Set-Top Box Designs
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ISL6422
TABLE 13. COMMAND REGISTER SR3 CONFIGURATION
SR3H SR3M SR3L DCL1 VSPEN1 ISEL1R ISEL1H ISEL1L
FUNCTION
0
1
0
X
X
X
X
X SR3 is selected
0
1
0
0
X
0
X
X IOUT1 = 275mA maximum
0
1
0
0
X
1
0
0 IOUT1 = 350mA maximum
0
1
0
0
X
1
0
1 IOUT1 = 515mA maximum
0
1
0
0
X
1
1
0 IOUT1 = 635mA maximum
0
1
0
0
X
1
1
1 IOUT1 = 800mA maximum
0
1
0
1
X
X
X
X Dynamic current limit NOT selected
0
1
0
0
X
X
X
Dynamic current limit selected
0
1
0
X
0
X
X
X SELVTOP H/W pin Enabled
0
1
0
X
1
X
X
X SELVTOP H/W pin Disabled
NOTE: X is a “Don’t Care” for the Write mode.
TABLE 14. CONTROL REGISTER SR4 CONFIGURATION
SR4H SR4M SR4L EN1
X
X VTOP1 VBOT1
FUNCTION
0
1
1
1
X
X
0
0 SR4 is selected
0
1
1
1
X
X
0
0 VSPEN1 = SELVTOP1 = 0, VOUT1 = 13V,
VBOOST1 = 13V + VDROP
0
1
1
1
X
X
0
1 VSPEN1 = SELVTOP1 = 0, VOUT1 = 14V,
VBOOST1 = 14V + VDROP
0
1
1
1
X
X
1
0 VSPEN1 = SELVTOP1 = 0, VOUT1 = 13V,
VBOOST1 = 13V + VDROP
0
1
1
1
X
X
1
1 VSPEN1 = SELVTOP1 = 0, VOUT1 = 14V,
VBOOST1 = 14V + VDROP
0
1
1
1
X
X
0
0 VSPEN1 = 0, SELVTOP1 = 1, VOUT1 = 18V,
VBOOST1 = 18V + VDROP
0
1
1
1
X
X
0
1 VSPEN1 = 0, SELVTOP1 = 1, VOUT1 = 18V,
VBOOST1 = 18V + VDROP
0
1
1
1
X
X
1
0 VSPEN1 = 0, SELVTOP1 = 1, VOUT1 = 19V,
VBOOST1 = 19V + VDROP
0
1
1
1
X
X
1
1 VSPEN1 = 0, SELVTOP1 = 1, VOUT1 = 19V,
VBOOST1 = 19V + VDROP
0
1
1
1
X
X
0
0 VSPEN1 = 1, SELVTOP1 = X, VOUT1 = 13V,
VBOOST1 = 13V + VDROP
0
1
1
1
X
X
0
1 VSPEN1 = 1, SELVTOP1 = X, VOUT1 = 14V,
VBOOST1 = 14V + VDROP
0
1
1
1
X
X
1
0 VSPEN1 = 1, SELVTOP1 = X, VOUT1 = 18V,
VBOOST1 = 18V + VDROP
0
1
1
1
X
X
1
1 VSPEN1 = 1, SELVTOP1 = X, VOUT1 = 19V,
VBOOST1 = 19V + VDROP
0
1
1
0
X
X
X
X PWM and Linear for channel 1 disabled
NOTE: X is a “Don’t Care” for the Write mode.
14
FN9190.1
April 10, 2007
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