CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
NOTES:
4.
θ
JA
is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See
Tech Brief TB379.
5. For
θ
JC
, the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications
Unless otherwise noted, all parameters are guaranteed over the operational supply voltage and temperature
range of the device as follows: T
A
= -40°C to +85°C; V
IN
= (V
O
+ 0.5V) to 5.5V with a minimum V
IN
of 2.3V;
C
IN
= 1µF; C
O
= 1µF.
SYMBOL
TEST CONDITIONS
MIN
MAX
(Note 8) TYP (Note 8)
UNITS
PARAMETER
DC CHARACTERISTICS
Supply Voltage
Ground Current
V
IN
Quiescent condition: I
O
= 0µA
I
DD
LDO active
LDO disabled @ +25°C
2.3
6.5
V
50
0.1
1.9
1.6
2.1
1.8
75
1.0
2.3
2.0
+0.7
+0.8
+1.8
µA
µA
V
V
%
%
%
mA
Shutdown Current
UVLO Threshold
I
DDS
V
UV+
V
UV-
Regulation Voltage Accuracy
Initial accuracy at V
IN
= V
O
+ 0.5V, I
O
= 10mA, T
J
= +25°C
V
IN
= V
O
+ 0.5V to 5.5V, I
O
= 10µA to 300mA, T
J
= +25°C
V
IN
= V
O
+ 0.5V to 5.5V, I
O
= 10µA to 300mA, T
J
= -40°C to
+125°C
-0.7
-0.8
-1.8
300
350
475
300
250
200
145
110
Maximum Output Current
Internal Current Limit
Dropout Voltage (Note 7)
I
MAX
I
LIM
V
DO1
V
DO2
V
DO3
Continuous
600
500
400
325
mA
mV
mV
mV
°C
°C
I
O
= 300mA; V
O
<
2.5V
I
O
= 300mA; 2.5V
≤
V
O
≤
2.8V
I
O
= 300mA; V
O
> 2.8V
Thermal Shutdown Temperature
T
SD+
T
SD-
AC CHARACTERISTICS
Ripple Rejection (Note 6)
I
O
= 10mA, V
IN
= 2.8V (min), V
O
= 1.8V
@ 1kHz
@ 10kHz
@ 100kHz
Output Noise Voltage (Note 6)
I
O
= 100µA, V
O
= 1.5V, T
A
= +25°C
BW = 10Hz to 100kHz
75
60
40
45
dB
dB
dB
µV
RMS
2
FN9234.2
May 5, 2008
ISL9005
Electrical Specifications
Unless otherwise noted, all parameters are guaranteed over the operational supply voltage and temperature
range of the device as follows: T
A
= -40°C to +85°C; V
IN
= (V
O
+ 0.5V) to 5.5V with a minimum V
IN
of 2.3V;
C
IN
= 1µF; C
O
= 1µF.
(Continued)
SYMBOL
TEST CONDITIONS
MIN
MAX
(Note 8) TYP (Note 8)
UNITS
PARAMETER
DEVICE START-UP CHARACTERISTICS
Device Enable Time
LDO Soft-start Ramp Rate
EN PIN CHARACTERISTICS
Input Low Voltage
Input High Voltage
Input Leakage Current
Pin Capacitance
NOTES:
6. Limits established by characterization and are not production tested.
7. VOx = 0.98*VOx(NOM); Valid for VOx greater than 1.85V.
8. Parts are 100% tested at +25°C. Temperature limits established by characterization and are not production tested.
V
IL
V
IH
I
IL
, I
IH
C
PIN
Informative
5
-0.3
1.4
0.5
V
IN
+ 0.3
0.1
V
V
µA
pF
t
EN
t
SSR
Time from assertion of the ENx pin to when the output voltage
reaches 95% of the VO (nom)
Slope of linear portion of LDO output voltage ramp during
l 引言 欧洲ETSI协会制定的数字电视广播DVB系列标准(DVB-T／C／S)不仅可传送数字电视业务，还可提供数据广播业务［1-2］。DVB数据广播标准定义了7种数据广播方式，但此协议只规定了数据广播的下3层协议，并没有规定应用层数据业务是如何封装的。实际应用中存在着各种类型的数据业务，包括流媒体业务、文件业务、互动信息等，对于这些应用，各公司和厂商都定义了自己的业务传输协议。目前的应...[详细]
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