LM78S40CN/NOPB National Semiconductor, LM78S40CN/NOPB Datasheet - Page 2

• Manufacturer Part Number: LM78S40CN/NOPB
• Description: IC MULTI CONFIG ADJ 1.5A 16DIP
• Manufacturer: National Semiconductor
• Type: Step-Down (Buck), Step-Up (Boost), Invertingr

Specifications of LM78S40CN/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.25 ~ 40 V
• Current - Output: 1.5A
• Frequency - Switching: 100kHz
• Voltage - Input: 2.5 ~ 40 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Power - Output: 1.04W
• Common Mode Rejection Ratio: 76
• Current, Input Bias: 35 nA (Comparator), 30 nA (Operational Amplifier)
• Current, Input Offset: 5 nA
• Current, Output: 1.5 A
• Current, Supply: 2.3 mA
• Package Type: DIP-16
• Power Dissipation: 1.04 W
• Regulation, Line: 0.04 mV/V
• Regulation, Load: 0.2 mV/mA
• Regulator Type: Switching, Step-Up, Step-Down
• Temperature, Operating, Range: -40 to +125 °C
• Voltage, Input: 2.5 to 40 V
• Voltage, Offset: 1.5 mV (Comparator), 4 mV (Operational Amplifier)
• Voltage, Output: 1.25 to 40 V
• Voltage, Supply, Rejection Ratio: 76 dB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM78S40CN; *LM78S40CN/NOPB; 78S40; LM78S40CN

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