參數(shù)資料
型號(hào): LT1121HV
廠商: Linear Technology Corporation
英文描述: 500mA, Low Voltage, Very Low Dropout Linear Regulator
中文描述: 500mA的,低電壓,非常低壓差線性穩(wěn)壓器
文件頁(yè)數(shù): 11/12頁(yè)
文件大?。?/td> 269K
代理商: LT1121HV
11
LT1121/LT1121-3.3/LT1121-5
U
S
A
When the input of the LT1121 is forced to a voltage below
its nominal output voltage and its output is held high, the
reverse output current will still follow the curve in Figure
2. This condition can occur if the input of the LT1121 is
connected to a discharged (low voltage) battery and the
output is held up by either a backup battery or by a second
regulator circuit. When the input pin is forced below the
output pin or the output pin is pulled above the input pin,
the input current will typically drop to less than 2
μ
A (see
Figure 3). The state of the shutdown pin will have no effect
on the reverse output current when the output is pulled
above the input.
O
PPLICATI
U
U
INPUT VOLTAGE (V)
0
I
μ
A
5
4
3
2
1
0
4
1121 F03
1
2
3
5
V
OUT
= 3.3V (LT1121-3.3)
V
OUT
= 5V (LT1121-5)
Figure 3. Input Current
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
Table 6. Fault Conditions
INPUT PIN
< V
OUT
(Nominal)
SHDN PIN
Open (Hi)
OUTPUT PIN
Forced to V
OUT
(Nominal)
Reverse Output Current
15
μ
A (See Figure 2)
Input Current
1
μ
A (See Figure 3)
Reverse Output Current
15
μ
A (See Figure 2)
Input Current
1
μ
A (See Figure 3)
Reverse Output Current
15
μ
A (See Figure 2)
Reverse Output Current
15
μ
A (See Figure 2)
Output Current = 0
Output Current = 0
Output Current = Short-Circuit Current
Output Current = 0
< V
OUT
(Nominal)
Grounded
Forced to V
OUT
(Nominal)
Open
Open
0.8V
0.8V
> 1.5V
Open (Hi)
Grounded
Open (Hi)
Grounded
Open (Hi)
Grounded
Forced to V
OUT
(Nominal)
Forced to V
OUT
(Nominal)
0V
0V
0V
0V
–30V < V
IN
< 30V
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