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参数资料
| 型号： | LT1239CS#TR |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封装： | 0.150 INCH, PLASTIC, SOP-16 |
| 文件页数： | 6/12页 |
| 文件大小： | 235K |
| 代理商： | LT1239CS#TR |
3
LT1239
ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Regulator 1 (Notes 7, 8)
Shutdown Threshold
VOUT1 = Off to On
q
1.20
2.8
V
VOUT1 = On to Off
q
0.25
0.75
V
Shutdown Pin Current (Note 13)
VSHDN1 = 0V
q
24
A
Quiescent Current in Shutdown (Note 10)
VIN1 = 24V, VSHDN1 = 0V
q
10
16
A
Ripple Rejection
VIN1 = 5V (Avg), VRIPPLE = 0.5VP-P
fRIPPLE = 120Hz, ILOAD = 20mA, TJ = 25°C50
59
dB
Current Limit
VIN1 = 7V, VOUT1 = 0V, TJ = 25°C30
50
mA
VOUT1 = VOUT1(NOM) – 100mV, TJ = 25°C40
70
mA
Reverse Output Current
VOUT1 = 3.75V, VIN1 < 3.75V
q
612
A
VOUT1 = 3.75V, VIN1 = Open Circuit
q
612
A
Current Monitor Pin Output Current
VOUT1 = 3.75V, VIMON1 = 0V, IOUT1 = 1mA
4.6
A
VOUT1 = 3.75V, VIMON1 = 0V, IOUT1 = 10mA
q
38
44
50
A
VOUT1 = 3.75V, VIMON1 = 0V, IOUT1 = 50mA
215
A
Comparator
Output Saturation Voltage (V5VIN – VOUT2)VIN1 = 7V, VIN2 = 0V, V5VIN = 5V, IOUT2 = 1mA
q
12
40
mV
VIN1 = 7V, VIN2 = 0V, V5VIN = 5V, IOUT2 = 30mA
q
110
150
mV
VIN1 = 7V, VIN2 = 0V, V5VIN = 5V, IOUT2 = 50mA
q
135
220
mV
Low-Battery Detector
Turn-Off Threshold
TJ = 25°C
4.85
5.00
5.15
V
Turn-On Threshold
TJ = 25°C
5.3
V
Hysteresis
TJ = 25°C
0.2
0.3
V
Regulator 2
Regulated Output Voltage
VIN2 = 6.8V, IOUT = 1mA, TJ = 25°C
4.775
4.850
4.925
V
Output Voltage Temperature Coefficient
– 0.5
mV/
°C
Line Regulation
IOUT2 = 1mA, VIN2 = 5.4V to 10V
q
25
mV
Load Regulation
VIN2 = 6.8V, ILOAD = 1mA to 30mA, TJ = 25°C– 12
– 25
mV
VIN2 = 6.8V, ILOAD = 1mA to 30mA
q
–20
– 50
mV
VIN2 = 6.8V, ILOAD = 1mA to 50mA, TJ = 25°C– 20
mV
VIN2 = 6.8V, ILOAD = 1mA to 50mA
– 30
mV
Ground Pin Current
ILOAD = 0mA, VIN2 = 5.4V
q
16
25
A
ILOAD = 30mA, VIN2 = 5.4V
q
0.80
1.2
mA
ILOAD = 50mA, VIN2 = 5.4V
q
1.35
mA
Shutdown Threshold
VOUT2 = Off to On
q
1.20
2.8
V
VOUT2 = On to Off
q
0.25
0.75
V
Shutdown Pin Current
VSHDN2 = 0V
q
1.7
4
A
Ripple Rejection
VIN2 = 6.4V (Avg), VRIPPLE = 0.5VP-P
fRIPPLE = 120Hz, ILOAD = 20mA, TJ = 25°C50
58
dB
Current Limit
VIN2 = 6.8V, VOUT2 = 0V, TJ 25°C30
50
mA
VOUT2 = VOUT2(NOM) – 100mV, TJ = 25°C40
70
mA
Reverse Output Current
VOUT2 = 4.85V, VIN2 < 4.85V
q
612
A
VOUT2 = 4.85V, VIN2 = Open Circuit
q
612
A
Current Monitor Pin Output Current
VOUT2 = 6.8V, VIMON2 = 0V, IOUT2 = 1mA
4.7
A
VOUT2 = 6.8V, VIMON2 = 0V, IOUT2 = 10mA
q
35
41
47
A
VOUT2 = 6.8V, VIMON2 = 0V, IOUT2 = 50mA
210
A
Error Amplifier
Bias Current
VE/A(IN) = 3.4V, VIN2 = 6.8V
q
320
nA
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