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78S40 Datasheet(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # 78S40
Description  Universal Switching Regulator Subsystem
PDF  10 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

78S40 Datasheet(HTML) 5 Page - National Semiconductor (TI)

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Typical Performance Characteristics
Design Formulas
Characteristic
Step-Down
Step-Up
Inverting
Units
(t
on +toff) Max
µs
C
T
4x10
−5 t
on
4x10
−5 t
on
4x10
−5 t
on
µF
I
pk
2I
O Max
A
L
Min
µH
R
SC
0.33/I
pk
0.33/I
pk
0.33/I
pk
Ω
C
O
µF
Note 6: VSAT = Saturation voltage of the switching element.
VD = Forward voltage of the flyback diode.
C
T vs OFF Time
DS010057-6
Reference Voltage vs
Junction Temperature
DS010057-7
Discharge Current vs
Input Voltage
DS010057-8
Current Limit Sense
Voltage vs Input Voltage
DS010057-9
5
www.national.com



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