PT78NR200 Datasheet, PDF (1/2 Pages) Texas Instruments – 10-12W Plus to Minus Voltage Integrated Switching Regulator

PT78NR200 Series
10-12W Plus to Minus Voltage
Integrated Switching Regulator
SLTS074A
(Revised 6/30/2000)
• Negative output from positive input
• Wide Input Range
• Self-Contained Inductor
• Short Circuit Protection
• Over-Temperature Protection
• Fast Transient Response
The PT78NR200 series creates
negative output voltage from a posi-
tive input voltage greater than 9V.
These easy-to-use, 3-terminal, Inte-
grated Switching Regulators (ISRs)
have maximum output power of 10 to
12 watts and a negative output voltage
that is laser trimmed. They also have
excellent line and load regulation.
The PT78NR200 requires 100
LFM of airflow at its maximum
output current.
Standard Application
Vin
C1
COM
1 _PT78NR200 2
+
3
C2
-Vout
+
COM
C1 = Required 100µF electrolytic
C2 = Required 100µF electrolytic
Pin-Out Information
Pin Function
1
+V_in
2
-V_out
3 GND
Ordering Information
PT78NR2 XX Y
Output Voltage
52 = -5.2 Volts
06 = -6.0 Volts
12 = -12.0 Volts
15 = -15.0 Volts
Package Suffix
H = Horizontal Mount
S = Surface Mount
V = Vertical Mount
(For dimensions and PC board layout, see
Package Styles 600 and 610.)
Specifications
Pkg Style 600
Characteristics
(T_a= 25°C unless noted)
Symbols
Conditions
Output Current
Short Circuit Current
Inrush Current
Input Voltage Range
Output Voltage Tolerance
Line Regulation
Load Regulation
Vo 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
Io
Isc
Iir
tir
Vin
∆V_o
Reg_line
Regload
Vn
t_tr
η
ƒo
Ta
Ta
θ_ja
Ts
—
Over Vin range
Vin=10V
Vo= -5.2V
Vo= -12.0V
Vin=10V
On start-up
0.1 ≤ Io ≤ Imax
Over V_in range
Ta= 0°C to +70°C
Over V_in range
0.3 ≤ Io ≤ Imax
Vin=10V, Io=Imax
50% load change
Vo over/undershoot
V_in=9V, I_o=0.5×I_max, V_o=-12V
Over Vin and Io ranges
100 LFM airflow
Over Vin and Io Ranges
100 LFM airflow
Over Vin and Io Ranges
100 LFM airflow
—
Per Mil-STD-883D, Method 2002.3
Mechanical Vibration
—
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz, soldered in a PC board
Weight
—
—
*ISR will operate down to no load with reduced specifications.
**See Thermal Derating chart.
Note: The PT78NR200 series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications.
PT78NR200 SERIES
Min
Typ
0.1*
—
0.1*
—
—
4×Imax
—
4
—
0.5
9
—
—
±1.0
—
±0.5
—
±0.5
—
±2
—
100
—
5.0
—
78
600
650
0
—
0
—
—
35
-40
—
—
500
—
10
—
11
Max
2.0
1.0
—
—
—
15
±3.0
±1.0
±1.0
—
250
—
—
700
+85
+60**
—
+125
—
—
Units
A
A
Apk
A
mSec
V
%Vo
%V_o
%Vo
%Vo
µSec
%Vo
%
kHz
°C
°C
°C/W
°C
G’s
G’s
Grams
For technical support and more information, see inside back cover or visit www.ti.com/powertrends