參數(shù)資料
型號(hào): LM2577S-15
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類(lèi): 穩(wěn)壓器
英文描述: SIMPLE SWITCHER Step-Up Voltage Regulator
中文描述: 6 A SWITCHING REGULATOR, 62 kHz SWITCHING FREQ-MAX, PSSO5
封裝: TO-263, 5 PIN
文件頁(yè)數(shù): 4/27頁(yè)
文件大小: 889K
代理商: LM2577S-15
Electrical Characteristics—LM1577-15, LM2577-15
(Continued)
Specifications with standard type face are for T
= 25C, and those in
bold type face
apply over full
Operating Temperature
Range
. Unless otherwise specified, V
IN
= 5V, and I
SWITCH
= 0.
LM1577-15
Limit
(Notes 3, 4)
LM2577-15
Limit
(Note 5)
Units
(Limits)
Symbol
Parameter
Conditions
Typical
DEVICE PARAMETERS
Undervoltage
Lockout
Oscillator Frequency
2.70/
2.65
3.10/
3.15
2.70/
2.65
3.10/
3.15
V(min)
V(max)
kHz
kHz(min)
kHz(max)
V
V(min)
V(max)
mV
f
O
Measured at Switch Pin
I
SWITCH
= 100 mA
52
48/
42
56/
62
48/
42
56/
62
V
REF
Output Reference
Voltage
Measured at Feedback Pin
V
IN
= 3.5V to 40V
V
COMP
= 1.0V
V
IN
= 3.5V to 40V
15
14.70/
14.55
15.30/
15.45
14.70/
14.55
15.30/
15.45
Output Reference
10
Voltage Line Regulation
R
FB
Feedback Pin Input
Voltage Line Regulator
Error Amp
Transconductance
12.2
k
G
M
I
COMP
= 30 μA to +30 μA
V
COMP
= 1.0V
300
μmho
μmho(min)
μmho(max)
V/V
V/V(min)
170/
110
420/
500
170/
110
420/
500
A
VOL
Error Amp
Voltage Gain
V
COMP
= 1.1V to 1.9V
R
COMP
= 1.0 M
(Note 7)
Upper Limit
V
FEEDBACK
= 12.0V
Lower Limit
V
FEEDBACK
= 18.0V
V
FEEDBACK
= 12.0V to 18.0V
V
COMP
= 1.0V
65
40/
20
40/
20
Error Amplifier
Output Swing
2.4
V
2.2/
2.0
2.2/
2.0
V(min)
V
V(max)
μA
μA(min)
μA(max)
μA
μA(min)
μA(max)
%
%(min)
A/V
0.3
0.4/
0.55
0.40/
0.55
Error Amp
Output Current
±
200
±
130/
±
90
±
300/
±
400
±
130/
±
90
±
300/
±
400
I
SS
Soft Start Current
V
FEEDBACK
= 12.0V
V
COMP
= 0V
5.0
2.5/
1.5
7.5/
9.5
2.5/
1.5
7.5/
9.5
D
Maximum Duty
Cycle
Switch
Transconductance
V
COMP
= 1.5V
I
SWITCH
= 100 mA
95
93/
90
93/
90
12.5
I
L
Switch Leakage
Current
V
SWITCH
= 65V
V
FEEDBACK
= 18.0V
(Switch Off)
I
SWITCH
= 2.0A
V
COMP
= 2.0V
(Max Duty Cycle)
V
COMP
= 2.0V
10
μA
300/
600
300/
600
μA(max)
V
SAT
Switch Saturation
Voltage
0.5
V
0.7/
0.9
0.7/
0.9
V(max)
NPN Switch
Current Limit
4.3
A
3.7/
3.0
5.3/
6.0
3.7/
3.0
5.3/
6.0
A(min)
A(max)
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