參數(shù)資料
型號(hào)： LM2577SX-15/NOPB
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： 6 A SWITCHING REGULATOR, 62 kHz SWITCHING FREQ-MAX, PSSO5
封裝： TO-263, 5 PIN
文件頁(yè)數(shù)： 29/34頁(yè)
文件大?。?/td> 1008K
代理商： LM2577SX-15/NOPB
Electrical Characteristics — LM1577-15, LM2577-15 (Continued)
Specifications with standard type face are for T
J = 25C, and those in bold type face apply over full Operating Temperature
Range. Unless otherwise specified, V
IN = 5V, and ISWITCH = 0.
LM1577-15
LM2577-15
Units
Symbol
Parameter
Conditions
Typical
Limit
(Limits)
(Notes 3, 4)
(Note 5)
DEVICE PARAMETERS
Undervoltage
2.70/2.65
V(min)
Lockout
3.10/3.15
V(max)
f
O
Oscillator Frequency
Measured at Switch Pin
52
kHz
I
SWITCH = 100 mA
48/42
kHz(min)
56/62
kHz(max)
V
REF
Output Reference
Measured at Feedback Pin
V
Voltage
V
IN = 3.5V to 40V
15
14.70/14.55
V(min)
V
COMP = 1.0V
15.30/15.45
V(max)
Output Reference
V
IN = 3.5V to 40V
10
mV
Voltage Line Regulation
R
FB
Feedback Pin Input
12.2
k
Voltage Line Regulator
G
M
Error Amp
I
COMP = 30 A to +30 A
300
mho
Transconductance
V
COMP = 1.0V
170/110
mho(min)
420/500
mho(max)
A
VOL
Error Amp
V
COMP = 1.1V to 1.9V
65
V/V
Voltage Gain
R
COMP = 1.0 M
40/20
V/V(min)
(Note 7)
Error Amplifier
Upper Limit
2.4
V
Output Swing
V
FEEDBACK = 12.0V
2.2/2.0
V(min)
Lower Limit
0.3
V
FEEDBACK = 18.0V
0.4/0.55
0.40/0.55
V(max)
Error Amp
V
FEEDBACK = 12.0V to 18.0V
±200
A
Output Current
V
COMP = 1.0V
±130/±90
A(min)
±300/±400
A(max)
I
SS
Soft Start Current
V
FEEDBACK = 12.0V
5.0
A
V
COMP = 0V
2.5/1.5
A(min)
7.5/9.5
A(max)
D
Maximum Duty
V
COMP = 1.5V
95
%
Cycle
I
SWITCH = 100 mA
93/90
%(min)
Switch
Transconductance
12.5
A/V
I
L
Switch Leakage
V
SWITCH = 65V
10
A
Current
V
FEEDBACK = 18.0V
300/600
A(max)
(Switch Off)
V
SAT
Switch Saturation
I
SWITCH = 2.0A
0.5
V
Voltage
V
COMP = 2.0V
0.7/0.9
V(max)
(Max Duty Cycle)
NPN Switch
V
COMP = 2.0V
4.3
A
Current Limit
3.7/3.0
A(min)
5.3/6.0
A(max)
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