參數(shù)資料
型號： LT1239
廠商： Linear Technology Corporation
英文描述： Backup Battery Management Circuit(后備電池管理電路)
中文描述： 備份電池管理電路（后備電池管理電路）
文件頁數(shù)： 3/12頁
文件大?。?/td> 211K
代理商： LT1239
3
LT1239
ELECTRICAL CHARACTERISTICS
PARAMETER
Regulator 1 (Notes 7, 8)
Shutdown Threshold
CONDITIONS
MIN
TYP
MAX
UNITS
V
OUT1
= Off to On
V
OUT1
= On to Off
V
SHDN1
= 0V
V
IN1
= 24V, V
SHDN1
= 0V
V
IN1
= 5V (Avg), V
RIPPLE
= 0.5V
P-P
f
RIPPLE
= 120Hz, I
LOAD
= 20mA, T
J
= 25
°
C
V
IN1
= 7V, V
OUT1
= 0V, T
J
= 25
°
C
V
OUT1
= V
OUT1(NOM)
– 100mV, T
J
= 25
°
C
V
OUT1
= 3.75V, V
IN1
< 3.75V
V
OUT1
= 3.75V, V
IN1
= Open Circuit
V
OUT1
= 3.75V, V
IMON1
= 0V, I
OUT1
= 1mA
V
OUT1
= 3.75V, V
IMON1
= 0V, I
OUT1
= 10mA
V
OUT1
= 3.75V, V
IMON1
= 0V, I
OUT1
= 50mA
G
G
1.20
0.75
2
10
2.8
V
V
0.25
Shutdown Pin Current (Note 13)
Quiescent Current in Shutdown (Note 10)
Ripple Rejection
G
4
μ
A
μ
A
G
16
50
30
40
59
50
70
6
6
4.6
44
215
dB
mA
mA
μ
A
μ
A
μ
A
μ
A
μ
A
Current Limit
Reverse Output Current
G
G
12
12
Current Monitor Pin Output Current
G
38
50
Comparator
Output Saturation Voltage (V
5VIN
– V
OUT2
)
V
IN1
= 7V, V
IN2
= 0V, V
5VIN
= 5V, I
OUT2
= 1mA
V
IN1
= 7V, V
IN2
= 0V, V
5VIN
= 5V, I
OUT2
= 30mA
V
IN1
= 7V, V
IN2
= 0V, V
5VIN
= 5V, I
OUT2
= 50mA
G
G
G
12
110
135
40
150
220
mV
mV
mV
Low-Battery Detector
Turn-Off Threshold
Turn-On Threshold
Hysteresis
Regulator 2
Regulated Output Voltage
Output Voltage Temperature Coefficient
Line Regulation
Load Regulation
T
J
= 25
°
C
T
J
= 25
°
C
T
J
= 25
°
C
4.85
5.00
5.3
0.3
5.15
V
V
V
0.2
V
IN2
= 6.8V, I
OUT
= 1mA, T
J
= 25
°
C
4.775
4.850
–0.5
2
–12
–20
–20
–30
16
0.80
1.35
1.20
0.75
1.7
4.925
V
mV/
°
C
mV
mV
mV
mV
mV
I
OUT2
= 1mA, V
IN2
= 5.4V to 10V
V
IN2
= 6.8V, I
LOAD
= 1mA to 30mA, T
J
= 25
°
C
V
IN2
= 6.8V, I
LOAD
= 1mA to 30mA
V
IN2
= 6.8V, I
LOAD
= 1mA to 50mA, T
J
= 25
°
C
V
IN2
= 6.8V, I
LOAD
= 1mA to 50mA
I
LOAD
= 0mA, V
IN2
= 5.4V
I
LOAD
= 30mA, V
IN2
= 5.4V
I
LOAD
= 50mA, V
IN2
= 5.4V
V
OUT2
= Off to On
V
OUT2
= On to Off
V
SHDN2
= 0V
V
IN2
= 6.4V (Avg), V
RIPPLE
= 0.5V
P-P
f
RIPPLE
= 120Hz, I
LOAD
= 20mA, T
J
= 25
°
C
V
IN2
= 6.8V, V
OUT2
= 0V, T
J
25
°
C
V
OUT2
= V
OUT2(NOM)
– 100mV, T
J
= 25
°
C
V
OUT2
= 4.85V, V
IN2
< 4.85V
V
OUT2
= 4.85V, V
IN2
= Open Circuit
V
OUT2
= 6.8V, V
IMON2
= 0V, I
OUT2
= 1mA
V
OUT2
= 6.8V, V
IMON2
= 0V, I
OUT2
= 10mA
V
OUT2
= 6.8V, V
IMON2
= 0V, I
OUT2
= 50mA
G
5
–25
–50
G
Ground Pin Current
G
G
G
25
1.2
μ
A
mA
mA
Shutdown Threshold
G
G
2.8
V
V
0.25
Shutdown Pin Current
Ripple Rejection
G
4
μ
A
50
30
40
58
50
70
6
6
4.7
41
210
dB
mA
mA
μ
A
μ
A
μ
A
μ
A
μ
A
Current Limit
Reverse Output Current
G
G
12
12
Current Monitor Pin Output Current
G
35
47
Error Amplifier
Bias Current
V
E/A(IN)
= 3.4V, V
IN2
= 6.8V
G
3
20
nA
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