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)： 12/34頁(yè)
文件大?。?/td> 1008K
代理商： LM2577SX-15/NOPB
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage
45V
Output Switch Voltage
65V
Output Switch Current (Note 2)
6.0A
Power Dissipation
Internally Limited
Storage Temperature Range
65C to +150C
Lead Temperature
(Soldering, 10 sec.)
260C
Maximum Junction Temperature
150C
Minimum ESD Rating
(C = 100 pF, R = 1.5 k
)2 kV
Operating Ratings
Supply Voltage
3.5V
≤ V
IN ≤ 40V
Output Switch Voltage
0V
≤ V
SWITCH ≤ 60V
Output Switch Current
I
SWITCH ≤ 3.0A
Junction Temperature Range
LM1577
55C
≤ T
J ≤ +150C
LM2577
40C
≤ T
J ≤ +125C
Electrical Characteristics — LM1577-12, LM2577-12
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.
LM1577-12
LM2577-12
Units
Symbol
Parameter
Conditions
Typical
Limit
(Limits)
(Notes 3, 4)
(Note 5)
SYSTEM PARAMETERS Circuit of
Figure 1 (Note 6)
V
OUT
Output Voltage
V
IN = 5V to 10V
12.0
V
I
LOAD = 100 mA to 800 mA
11.60/11.40
V(min)
(Note 3)
12.40/12.60
V(max)
Line Regulation
V
IN = 3.5V to 10V
20
mV
I
LOAD = 300 mA
50/100
mV(max)
Load Regulation
V
IN = 5V
20
mV
I
LOAD = 100 mA to 800 mA
50/100
mV(max)
η
Efficiency
V
IN = 5V, ILOAD = 800 mA
80
%
DEVICE PARAMETERS
I
S
Input Supply Current
V
FEEDBACK = 14V (Switch Off)
7.5
mA
10.0/14.0
mA(max)
I
SWITCH = 2.0A
25
mA
V
COMP = 2.0V (Max Duty Cycle)
50/85
mA(max)
V
UV
Input Supply
I
SWITCH = 100 mA
2.90
V
Undervoltage Lockout
2.70/2.65
V(min)
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
12
11.76/11.64
V(min)
V
COMP = 1.0V
12.24/12.36
V(max)
Output Reference
V
IN = 3.5V to 40V
7mV
Voltage Line Regulator
R
FB
Feedback Pin Input
9.7
k
Resistance
G
M
Error Amp
I
COMP = 30 A to +30 A
370
mho
Transconductance
V
COMP = 1.0V
225/145
mho(min)
515/615
mho(max)
A
VOL
Error Amp
V
COMP = 1.1V to 1.9V
80
V/V
Voltage Gain
R
COMP = 1.0 M
50/25
V/V(min)
(Note 7)
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