參數(shù)資料
型號(hào)： PT78NR100
廠商： Texas Instruments, Inc.
英文描述： Wide Input Plus to Minus Voltage ISR Family
中文描述： 寬輸入正到負(fù)電壓 ISR 系列
文件頁(yè)數(shù)： 1/3頁(yè)
文件大小： 218K
代理商： PT78NR100
For assistance or to order, call
(800) 531-5782
Power Trends, Inc.
27715 Diehl Road, Warrenville, IL 60555
(800) 531-5782
Fax: (630) 393-6902
http://www.powertrends.com
14
Application Notes
Mechanical Outline
Product Selector Guide
Revised 5/15/98
PT78NR100 S e r i e s
Standard Application
C1 = Required 100μF electrolytic
C2
= Required 100μF electrolytic
Ordering Information
PT78NR1
Pin-Out Information
Pin
Function
1
+V
i
n
2
-V
out
3
GND
Negative output from positive input
Wide Input Range
Self-Contained Inductor
Short Circuit Protection
Over-Temperature Protection
Fast Transient Response
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.
1 AMP PLUS TO MINUS VOLTAGE
INTEGRATED SWITCHING REGULATOR
PT78NR100
+
-Vout
COM
COM
Vin
1
3
2
C2
C1
+
Specifications
Characteristics
(T
a
= 25°C unless noted)
Output Current
PT78NR100 SERIES
Min
0.05*
0.05*
0.05*
0.05*
—
—
—
7
7
7
7
Symbols
I
o
Conditions
Over V
in
range
Typ
—
—
—
—
4
×
I
max
4
0.5
—
—
—
—
Max
1.00
0.55
0.40
0.30
—
—
—
25
21
18
15
Units
A
A
A
A
Apk
A
mSec
V
V
V
V
V
o
=-5V
V
o
=-7, -8, -9V
V
o
=-12V
V
o
=-15V
Short Circuit Current
Inrush Current
I
sc
I
ir
t
ir
V
in
V
in
=10V
V
=10V
On start-up
0.1
≤
I
o
≤
I
max
Input Voltage Range
V
o
=-5V
V
o
=-7, -8, -9V
V
o
=-12V
V
o
=-15V
Output Voltage Tolerance
V
o
Over V
range
T
a
=-20°C to +70°C
Over V
in
range
0.1
≤
I
o
≤
I
max
V
in
=10V, I
o
=I
max
50% load change
V
o
over/undershoot
V
in
=10V, I
o
=0.5
×
I
max,
V
o
= -5V
Over V
in
and I
o
ranges
Free Air Convection, (40-60LFM)
Over V
in
and I
o
Ranges
Free Air Convection, (40-60LFM)
Over V
in
and I
o
Ranges
Free Air Convection, (40-60LFM)
—
Per Mil-STD-883D, Method 2002.3
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz, soldered in a PC board
—
—
±1.0
±3.0
%V
o
Line Regulation
Load Regulation
V
o
Ripple/Noise
Transient Response
(with 100μF output cap)
Efficiency
Switching Frequency
Absolute Maximum
Operating Temperaturte Range
Recommended Operating
Temperature Range
Thermal Resistance
Storage Temperature
Mechanical Shock
Mechanical Vibration
Reg
line
Reg
load
V
n
t
tr
—
—
—
—
—
—
600
±0.5
±0.5
±2
100
5.0
75
650
±1.0
±1.0
—
250
—
—
700
%V
o
%V
o
%V
o
μSec
%V
o
%
kHz
η
o
T
a
-40
—
+85
°C
T
a
-40
—
+60**
°C
θ
ja
T
s
—
—
—
-40
—
45
—
500
—
+125
—
—
°C/W
°C
G’s
—
5
G’s
Weight
—
—
6.5
Grams
*ISR will operate down to no load with reduced specifications.
Note:
The PT78NR100 Series requires a 100μF electrolytic or tantalum output capacitor for proper operation in all applications.
**See Thermal Derating chart.
Package Suffix
V
= Vertical Mount
S
= Surface Mount
H
= Horizontal
Mount
XX
Y
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
Pkg Style 500
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PT78NR103ST 功能描述:REGULATOR -3V 1A 3SIP SMD RoHS:是 類別:電源 - 板載 >> DC DC Converters 系列:PT78NR100 標(biāo)準(zhǔn)包裝:10 系列:PT4570 類型:隔離 輸出數(shù):1 電壓 - 輸入（最?。?36V 電壓 - 輸入（最大）:75V Voltage - Output 1:9V Voltage - Output 2:- Voltage - Output 3:- 電流 - 輸出（最大）:3.3A 電源（瓦） - 制造商系列:30W 電壓 - 隔離:1.5kV（1500V） 特點(diǎn):- 安裝類型:表面貼裝 封裝/外殼:19-SIP SMD 模塊 尺寸/尺寸:3.00" L x 1.19" W x 0.50" H（76.2mm x 30.2mm x 12.7mm） 包裝:托盤(pán) 工作溫度:-40°C ~ 85°C 效率:84% 電源（瓦特）- 最大:30W
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