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Negative output from positive input
Wide Input Range
Self-Contained Inductor
Short Circuit Protection
Over-Temperature Protection
Fast Transient Response
Application Notes
Mechanical Outline
Product Selector Guide
Revised 5/15/98
The PT78NR100 Series creates a
negative output voltage from a positive
input voltage greater than 7V. These
easy-to-use, 3-terminal, Integrated
Switching Regulators (ISRs) have
maximum output power of 5 watts and
a negative output voltage that is laser
trimmed. They also have excellent line
and load regulation.
Pin-Out Information
Pin
1
Ordering Information
Function
+V
i
n
-V
out
GND
PT78NR1
XX
Output Voltage
03
= -3.0 Volts
05
= -5.0 Volts
52
= -5.2 Volts
07
= -7.0 Volts
08
= -8.0 Volts
09
= -9.0 Volts
12
= -12.0 Volts
15
= -15.0 Volts
Y
Package Suffix
V
= Vertical Mount
S
= Surface Mount
H
= Horizontal
Mount
Standard Application
Vin
+
1
2
3
2
PT78NR100
3
-Vout
C1
COM
C2
+
COM
C1 = Required 100碌F electrolytic
C2 = Required 100碌F electrolytic
Specifications
Characteristics
(T
a
= 25擄C unless noted)
Output Current
Symbols
I
o
Conditions
Pkg Style 500
PT78NR100 SERIES
Min
V
o
=-5V
V
o
=-7, -8, -9V
V
o
=-12V
V
o
=-15V
0.05*
0.05*
0.05*
0.05*
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V
o
=-5V
V
o
=-7, -8, -9V
V
o
=-12V
V
o
=-15V
7
7
7
7
1
2
3
