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LM78S40 データシート(PDF) 4 Page - Texas Instruments

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部品番号 LM78S40
部品情報  Universal Switching Regulator Subsystem
Download  14 Pages
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI1 - Texas Instruments

LM78S40 データシート(HTML) 4 Page - Texas Instruments

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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Storage Temperature Range
Ceramic DIP
−65˚C to +175˚C
Molded DIP
−65˚C to +150˚C
Operating Temperature Range
Extended (LM78S40J)
−55˚C to +125˚C
Industrial (LM78S40N)
−40˚C to +125˚C
Commercial (LM78S40CN)
0˚C to +70˚C
Lead Temperature
Ceramic DIP (Soldering, 60 sec.)
300˚C
Molded DIP (Soldering, 10 sec.)
265˚C
Internal Power Dissipation (Note 2) (Note 3)
16L-Ceramic DIP
1.50W
16L-Molded DIP
1.04W
Input Voltage from V
IN to GND
40V
Input Voltage from V
+ (Op Amp)
to GND
40V
Common Mode Input Range
(Comparator and Op Amp)
−0.3 to V+
Differential Input Voltage
(Note 4)
±30V
Output Short Circuit
Duration (Op Amp)
Continuous
Current from V
REF
10 mA
Voltage from Switch
Collectors to GND
40V
Voltage from Switch
Emitters to GND
40V
Voltage from Switch
Collectors to Emitter
40V
Voltage from Power Diode to GND
40V
Reverse Power Diode Voltage
40V
Current through Power Switch
1.5A
Current through Power Diode
1.5A
ESD Susceptibility
(to be determined)
LM78S40
Electrical Characteristics (Note 5)
T
A = Operating temperature range, VIN = 5.0V, V
+(Op Amp) = 5.0V, unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
GENERAL CHARACTERISTICS
I
CC
Supply Current
V
IN = 5.0V
1.8
3.5
mA
(Op Amp Disconnected)
V
IN = 40V
2.3
5.0
mA
I
CC
Supply Current
V
IN = 5.0V
4.0
mA
(Op Amp Connected)
V
IN = 40V
5.5
mA
REFERENCE SECTION
V
REF
Reference Voltage
I
REF = 1.0 mA
Extend −55˚C < T
A <
+125˚C,
Comm 0 < T
A < +70˚C,
1.180
1.245
1.310
V
Indus −40˚C < T
A < +85˚C
V
R LINE
Reference Voltage
V
IN = 3.0V to VIN = 40V,
0.04
0.2
mV/V
Line Regulation
I
REF = 1.0 mA, TA = 25˚C
V
R LOAD
Reference Voltage
I
REF = 1.0 mA to IREF = 10 mA,
0.2
0.5
mV/mA
Load Regulation
T
A = 25˚C
OSCILLATOR SECTION
I
CHG
Charging Current
V
IN = 5.0V, TA = 25˚C
20
50
µA
I
CHG
Charging Current
V
IN = 40V, TA = 25˚C
20
70
µA
I
DISCHG
Discharge Current
V
IN = 5.0V, TA = 25˚C
150
250
µA
I
DISCHG
Discharge Current
V
IN = 40V, TA = 25˚C
150
350
µA
V
OSC
Oscillator Voltage Swing
V
IN = 5.0V, TA = 25˚C
0.5
V
t
on/toff
Ratio of Charge/
6.0
µs/µs
Discharge Time
CURRENT LIMIT SECTION
V
CLS
Current Limit Sense
Voltage
T
A = 25˚C
250
350
mV
OUTPUT SWITCH SECTION
V
SAT 1
Output Saturation Voltage 1
I
SW = 1.0A (Figure 1)
1.1
1.3
V
V
SAT 2
Output Saturation Voltage 2
I
SW = 1.0A (Figure 2)
0.45
0.7
V
3
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