參數(shù)資料
型號: LTC1844ES5-2.8
廠商: LINEAR TECHNOLOGY CORP
元件分類: 基準電壓源/電流源
英文描述: 150mA, Micropower, Low Noise, VLDO Linear Regulator
中文描述: 2.8 V FIXED POSITIVE LDO REGULATOR, 0.165 V DROPOUT, PDSO5
封裝: PLASTIC, MO-193, THIN, SOT-23, 5 PIN
文件頁數(shù): 10/12頁
文件大小: 209K
代理商: LTC1844ES5-2.8
10
LTC1844 Series
1844ia
When V
IN
is held constant and V
OUT
varied, current flow
will follow the curves shown in Figure 7. With V
OUT
held
below V
OUT(NOM)
, the LTC1844 will be in current limit
trying to pull V
OUT
up. With V
OUT
held between V
OUT(NOM)
and V
IN
, I
IN
will be at the normal quiescent current level
and I
OUT
will be 1
μ
A to 2
μ
A. As V
OUT
is pulled above V
IN
,
I
OUT
temporarily increases to 30
μ
A until the reverse cur-
rent protection circuitry activates and reduces I
OUT
to less
than 10
μ
A.
Alternatively, when V
OUT
is held constant and V
IN
varied,
current flow will follow Figure 8’s curves. I
OUT
will be less
than 10
μ
A at all times except for a brief spike just below
2.7V before the reverse current protection circuitry acti-
vates.
APPLICATIO
S I
FOR
ATIO
U
W
U
U
Figure 7. Reverse Current vs Output Voltage
Figure 8. Reverse Current vs Input Voltage
OUTPUT VOLTAGE (V)
0
0
C
μ
A
5
15
20
25
50
35
2
4
5
I
IN
1844 F07
10
40
45
30
1
3
6
7
LTC1844-2.8
T
J
= 25
°
C
V
= 3.3V
CURRENT FLOWS
INTO PINS
I
OUT
IN CURRENT
LIMIT BELOW
2.8V
INPUT VOLTAGE (V)
0
C
μ
A
0.5
1.0
1.5
2.0
1844 F08
2.5
100
90
80
70
60
50
40
30
20
10
0
3.0
I
OUT
I
IN
LTC1844-2.8
T
J
= 25
°
C
V
= 2.7V
CURRENT FLOW
INTO PINS
IN CURRENT
LIMIT ABOVE
2.7V
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