參數(shù)資料
型號: LM2587S-5.0
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 穩(wěn)壓器
英文描述: SIMPLE SWITCHER 5A Flyback Regulator
中文描述: 5 A SWITCHING REGULATOR, 100 kHz SWITCHING FREQ-MAX, PSSO5
封裝: TO-263, 5 PIN
文件頁數(shù): 4/26頁
文件大?。?/td> 676K
代理商: LM2587S-5.0
LM2587-ADJ
Electrical Characteristics
(Continued)
Symbol
UNIQUE DEVICE PARAMETERS
(Note 5)
V
REF
Output Reference
Voltage
V
REF
Reference Voltage
Line Regulation
G
M
Error Amp
Transconductance
A
VOL
Error Amp
Voltage Gain
I
B
Error Amp
Input Bias Current
Parameters
Conditions
Typical
Min
Max
Units
Measured at Feedback Pin
V
COMP
= 1.0V
V
IN
= 4V to 40V
1.230
1.208/
1.205
1.252/
1.255
V
1.5
mV
I
COMP
= 30 μA to +30 μA
V
COMP
= 1.0V
V
COMP
= 0.5V to 1.6V
R
COMP
= 1.0 M
(Note 6)
V
COMP
= 1.0V
3.200
1.800
6.000
mmho
670
400/
200
V/V
125
425/
600
nA
All Output Voltage Versions
Electrical Characteristics
(Note 5)
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.
Symbol
I
S
Parameters
Input Supply Current
Conditions
Typical
11
Min
Max
Units
mA
(Switch Off)
(Note 8)
I
SWITCH
= 3.0A
R
LOAD
= 100
15.5/
16.5
85
3.30
140
3.05
165
3.75
mA
V
V
UV
Input Supply
Undervoltage Lockout
Oscillator Frequency
f
O
Measured at Switch Pin
R
LOAD
= 100
V
COMP
= 1.0V
Measured at Switch Pin
R
LOAD
= 100
V
FEEDBACK
= 1.15V
Upper Limit
(Note 7)
Lower Limit
(Note 8)
(Note 9)
100
85/
75
115/
125
kHz
f
SC
Short-Circuit
Frequency
25
kHz
V
EAO
Error Amplifier
Output Swing
2.8
2.6/
2.4
V
0.25
0.40/
0.55
V
I
EAO
Error Amp
Output Current
(Source or Sink)
Soft Start Current
165
110/
70
260/
320
μA
I
SS
V
FEEDBACK
= 0.92V
V
COMP
= 1.0V
R
LOAD
= 100
(Note 7)
Switch Off
V
SWITCH
= 60V
dV/dT = 1.5V/ns
11.0
8.0/
7.0
17.0/
19.0
μA
D
Maximum Duty Cycle
98
93/
90
%
I
L
Switch Leakage
Current
Switch Sustaining
Voltage
Switch Saturation
Voltage
NPN Switch
Current Limit
15
300/
600
μA
V
SUS
65
V
V
SAT
I
SWITCH
= 5.0A
0.7
1.1/
1.4
V
I
CL
6.5
5.0
9.5
A
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