ISL6423B Intersil Corporation, ISL6423B Datasheet - Page 7

• Manufacturer Part Number: ISL6423B
• Description: Single Output LNB Supply and Control Voltage Regulator
• Manufacturer: Intersil Corporation

Electrical Specifications
NOTES:
Tone Waveform
NOTES:
10. The tone rise and fall times are not shown due to resolution of graphics. It is 10µs typ for 22kHz.
11. The EXTM pins have input thresholds of Vil(max) = 0.8V and Vih(min) = 1.7V
OSCILLATOR
Oscillator Frequency
Thermal Shutdown
Temperature Shutdown Threshold
Temperature Shutdown Hysteresis
OTFI
FLT (released)
FLT (asserted)
5. Internal digital soft-start
6. EXTM, TXT and SELVTOP and addr 0/1 pins have 200k internal pulldown resistors.
7. On exceeding this backward current limit threshold for a period of 2ms, the device enters the Backward dynamic current limit mode (350mA typ)
8. In the Dynamic current limit mode the output is ON for 51ms and OFF for 900ms. But remains continuously ON in the Static mode. When tone
9. The signal pin TXT changes the decoder threshold during tone transmit and receive. TTH allows threshold control through I
MSEL
EXTM
VOUT
ENT
and the BCF I
clamped to the fault output voltage till released. On removal of the fault condition the device returns to normal operation
is ON the minimum current limit is 50mA lower the values indicated in the table.
I
I
PIN
PIN
2
2
C
C
PARAMETER
INTERNAL TONE
Tr = 10µs TYP
2
C bit is set. The dynamic current limit duty ratio during a back current fault is ON = 2ms/OFF = 50ms. The output will remain
22kHz
22kHz
7
V
VBOT = L, ENT = L, DCL = L, I
access to the system. (Continued)
CC
= 12V, T
SYMBOL
f
o
A
EXTERNAL TONE
Tr = 10µs TYP
= -20°C to +85°C, unless otherwise noted. Typical values are at T
22kHz
Fixed at (20)(f
V
I
SINK
FIGURE 1. TONE WAVEFORM
O
= 6V
= 3.2mA
OUT
TEST CONDITIONS
22kHz
tone
= 12mA, unless otherwise noted. See software description section for I
)
RETURNS TO NOMINAL V
AFTER THE LAST EXTM RISING EDGE
T > 55µs;
22kHz
OUT
22kHz
~1 PERIOD
MIN
396
-
-
-
-
TYP
440
150
A
20
-
-
INTERNAL TONE
= +25°C. EN = H, VTOP
MAX
484
0.4
10
2
-
-
C.
April 10, 2007
UNITS
kHz
FN6412.1
°C
°C
μA
V
2
C