ISL6421A Datasheet, PDF (10/12 Pages) Intersil Corporation – Single Output LNB Supply and Control Voltage Regulator with I2C Interface for Advanced Satellite Set-top Box Designs

ISL6421A
Typical Performance Curves
89
88
18.0V
87
86
85
14.0V
84
83
82
81
50.0
150.0
250.0
350.0
I_OUT (mA)
450.0
FIGURE 4. EFFICIENCY vs LOAD CURRENT
550.0
89
88
200mA
87
86
450mA
85
84
83
8.0
10.0
12.0
14.0
V_IN (V)
FIGURE 5. EFFICIENCY vs VIN
22kHz TONE
(0.1V/DIV)
10µs/DIV
FIGURE 6. 22kHz TONE
TONE &
VOUT (1V/DIV)
DSQIN
(1V/DIV)
0.2ms/DIV
FIGURE 7. 22kHz TONE MODULATED BY DSQIN
VOUT
(20mV/DIV)
VPWM
(20mV/DIV)
2µs/DIV
FIGURE 8. RIPPLE VOUT = 14.0V
10
VOUT
(20mV/DIV)
VPWM
(20mV/DIV)
2µs/DIV
FIGURE 9. RIPPLE VOUT = 18.0V
FN9167.2
February 11, 2005