参数资料
| 型号： | ISL6423EVEZ-T |
| 厂商： | Intersil |
| 文件页数： | 7/16页 |
| 文件大小： | 0K |
| 描述： | IC VREG SGL LNB W/I2C 28-HTSSOP |
| 标准包装： | 2,500 |
| 应用： | 转换器，卫星信号接收机顶盒设计 |
| 输入电压： | 8 V ~ 14 V |
| 输出数： | 1 |
| 输出电压： | 13.3 V ~ 18.3 V，14.3 V ~ 19.3 V |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 28-TSSOP 裸露焊盘 |
| 包装： | 带卷 (TR) |
ISL6423
Electrical Specifications
V CC = 12V, T A = -20°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C. EN = H, VTOP
VBOT = L, ENT = L, DCL = L, Iout = 12mA, unless otherwise noted. See software description section for I 2 C
access to the system. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
THERMAL SHUTDOWN
Temperature Shutdown Threshold
Temperature Shutdown Hysteresis
-
-
150
20
-
-
°C
°C
FLT
FLT (released)
FLT (asserted)
V O = 6V
I SINK = 3.2mA
-
-
-
-
10
0.4
μ A
V
NOTES:
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 100μs, the device enters the dynamic current limit mode and the BCF I 2 C bit
is set. The dynamic current limit duty ratio during a back current fault is ON = 100μs/OFF = 5ms.
8. In the Dynamic current limit mode the output is ON for 20ms and OFF for 900ms, but remains continuously ON in the Static mode. When tone
is ON, the minimum current limit is 50mA lower than the values indicated in the table. While in the dynamic mode of current limit the overload
trip level is momentarily increased to 990mA during the 20ms ON time to facilitate recovery from overload conditions.
Tone Waveform
ENT
I 2 C
MSEL
I 2 C
EXTM
PIN
VOUT
PIN
22kHz
22kHz
22kHz
22kHz
22kHz
22kHz
Internal Tone
Internal Tone
Tr = 10μs typ
External Tone
Tr = 10μs typ
Returns to nominal V OUT ~1 period
after the last EXTM rising edge
T > 55μs;
NOTES:
9. The signal pin TXT changes the decoder threshold during tone transmit and receive. TTH allows threshold control through I 2 C.
10. The tone rise and fall times are not shown due to resolution of graphics. It is 10μs typical for 22kHz.
11. The EXTM pins have input thresholds of Vil(max) = 0.8V and Vih(min) = 1.7V
FIGURE 1. TONE WAVEFORM
7
FN9191.2
December 5, 2008
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