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参数资料
| 型号： | LM1577THADJ/883 |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 6 A SWITCHING REGULATOR, 62 kHz SWITCHING FREQ-MAX, MSFM5 |
| 文件页数： | 5/6页 |
| 文件大小： | 23K |
| 代理商： | LM1577THADJ/883 |
MNLM1577-X-ADJ REV 0A0
MILITARY DATA SHEET
Electrical Characteristics
DC: DEVICE PARAMETERS
(The following conditions apply to all the following parameters, unless otherwise specified.)
DC:
Vin = 5V, Vfeedback = Vref, Iswitch = 0.
SYMBOL
PARAMETER
CONDITIONS
NOTES
PIN-
NAME
MIN
MAX
UNIT
SUB-
GROUPS
Is
Input Supply
Current
Vfeedback = 1.5V (Switch Off)
10.0
mA
1
14.0
mA
2, 3
Iswitch = 2.0A, Vcomp = 2.0V
(Max Duty Cycle)
50
mA
1
85
mA
2, 3
Vuv
Input Supply
Undervoltage
Lockout
Iswitch = 100mA
2.70
3.10
V
1
2.65
3.15
V
2, 3
Vref
Output Reference
Voltage
Measured at Feedback Pin,
Vin = 3.5V to 40V, Vcomp = 1.0V
1.214
1.246
V
1
1.206
1.254
V
2, 3
Ib
Error Amp Input
Bias Current
Vcomp = 1.0V
300
nA
1
800
nA
2, 3
GM
Error Amp
Transconductance
Icomp = -30uA to +30uA, Vcomp = 1.0V
2400
4800
umho
1
1600
5800
umho
2, 3
Avol
Error Amp Voltage
Gain
Vcomp = 1.1V to 1.6V,
Rcomp = 1.0 M Ohm
1
500
V/V
1
250
V/V
2, 3
Error Amplifier
Output Swing
Upper Limit Vfeedback = 1.0V
2.2
5.0
V
1
2.0
5.0
V
2, 3
Lower Limit Vfeedback = 1.5V
0.40
V
1
0.55
V
2, 3
Error Amplifier
Output Current
Vfeedback = 1.0V to 1.5V, Vcomp = 1.0V
-300
-130
uA
1
-400
-90
uA
2, 3
Vfeedback = 1.0V to 1.5V, Vcomp=1.0V
130
300
uA
1
90
400
uA
2, 3
Iss
Soft Start
Current
Vfeedback = 1.0V, Vcomp = 0V
2.5
7.5
uA
1
1.5
9.5
uA
2, 3
D
Maximum Duty
Cycle
Vcomp = 1.5V, Iswitch = 100mA
93
%
1
90
%
2, 3
Il
Switch Leakage
Current
Vswitch = 65V, Vfeedback = 1.5V
(Switch Off)
-1.0
300
uA
1
-1.0
600
uA
2, 3
Vsat
Switch Saturation
Voltage
Iswitch = 2.0A, Vcomp = 2.0V
(Max Duty Cycle)
0.7
V
1
0.9
V
2, 3
5
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