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參數(shù)資料
| 型號： | LM1578A |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | CAP 100UF 50V ELECT TG SMD |
| 中文描述： | 開關穩(wěn)壓器 |
| 文件頁數(shù)： | 2/18頁 |
| 文件大?。?/td> | 1037K |
| 代理商： | LM1578A |
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Total Supply Voltage
Collector Output to Ground
Emitter Output to Ground (Note 2)
Power Dissipation (Note 3)
Output Current
Storage Temperature
Lead Temperature
(soldering, 10 seconds)
Maximum Junction Temperature
50V
0.3V to +50V
1V to +50V
Internally limited
750 mA
65C to +150C
260C
150C
ESD Tolerance (Note 4)
2 kV
Operating Ratings
Ambient Temperature Range
LM1578A
LM2578A
LM3578A
Junction Temperature Range
LM1578A
LM2578A
LM3578A
55C
≤
T
A
≤
+125C
40C
≤
T
A
≤
+85C
0C
≤
T
A
≤
+70C
55C
≤
T
J
≤
+150C
40C
≤
T
J
≤
+125C
0C
≤
T
J
≤
+125C
Electrical Characteristics
These specifications apply for 2V
≤
V
≤
40V (2.2V
≤
V
≤
40V for T
≤
25C), timing capacitor C
= 3900 pF, and 25%
≤
duty cycle
≤
75%, unless otherwise specified. Values in standard typeface are for T
J
= 25C; values in
boldface type
apply for
operation over the specified operating junction temperature range.
LM1578A
Limit
(Note 6)
(Note 11)
LM2578A/
LM3578A
Limit
(Note 7)
Symbol
Parameter
Conditions
Typical
(Note 5)
Units
OSCILLATOR
f
OSC
Frequency
20
kHz
kHz (max)
kHz (min)
%/C
22.4
17.6
24
16
f
OSC
/
T
Frequency Drift with
Temperature
Amplitude
0.13
550
mV
p-p
REFERENCE/COMPARATOR
(Note 8)
V
R
Input Reference
Voltage
I
1
= I
2
= 0 mA and
I
1
= I
2
= 1 mA
±
1% (Note 9)
1.0
V
1.035/
1.050
0.965/
0.950
1.050/
1.070
V (max)
0.950/
0.930
V (min)
%/V
%/V (max)
μA
V
R
/
V
IN
Input Reference Volt-
age Line Regulation
Inverting Input
Current
Level Shift Accuracy
I
1
= I
2
= 0 mA and
I
1
= I
2
= 1 mA
±
1% (Note 9)
I
1
= I
2
= 0 mA, duty cycle = 25%
0.003
0.01/
0.02
0.01/
0.02
I
INV
0.5
Level Shift Current = 1 mA
1.0
%
% (max)
ppm/1000h
5/
8
10/
13
V
R
/
t
Input Reference
Voltage Long Term
Stability
100
OUTPUT
V
C
(sat)
Collector Saturation
Voltage
Emitter Saturation
Voltage
Collector Leakage
Current
Collector-Emitter
Sustaining Voltage
I
C
= 750 mA pulsed, Emitter
grounded
I
O
= 80 mA pulsed,
V
IN
= V
C
= 40V
V
IN
= V
CE
= 40V, Emitter
grounded, Output OFF
I
SUST
= 0.2A (pulsed), V
IN
= 0
0.7
V
V (max)
V
V (max)
μA
μA (max)
V
V (min)
0.85/
1.2
0.90/
1.2
V
E
(sat)
1.4
1.6/
2.1
1.7/
2.0
I
CES
0.1
50/
100
200/
250
BV
CEO(SUS)
60
50
50
www.national.com
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