SLTS058B Datasheet, PDF (1/6 Pages) Texas Instruments – 1 Amp Plus to Minus Voltage Integrated Switching Regulator

PT78NR100 Series
1 Amp Plus to Minus Voltage
Integrated Switching Regulator
SLTS058B
(Revised 8/31/2000)
• 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 posi-
tive input voltage greater than 7V.
These easy-to-use, 3-terminal, Inte-
grated 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
Ordering Information
Standard Application
Vin
C1
COM
1 _PT78NR100 2
+
3
C2
-Vout
+
COM
C1 = Required 100µF electrolytic (1)
C2 = Required 100µF electrolytic (1)
Specifications
Pin Function
1
+V_in
2
-V_out
3 GND
Pkg Style 500
PT78NR1 XX Y
Output Voltage
03 = -3.0 Volts
05 = -5.0 Volts
52 = -5.2 Volts
06 = -6.0 Volts
07 = -7.0 Volts
08 = -8.0 Volts
09 = -9.0 Volts
10 = -10.0 Volts
12 = -12.0 Volts
14 = -13.9 Volts
15 = -15.0 Volts
Package Suffix
V = Vertical Mount
S = Surface Mount
H = Horizontal
Mount
Characteristics
(T_a= 25°C unless noted)
Output Current
Symbols
Io
Short Circuit Current
Isc
Inrush Current
Iir
tir
Input Voltage Range
Vin
Output Voltage Tolerance
Line Regulation
Load Regulation
Vo Ripple/Noise
Transient Response
(with 100µF output cap)
Efficiency
Switching Frequency
Absolute Maximum
Operating Temperaturte Range
Thermal Resistance
Storage Temperature
Mechanical Shock
Mechanical Vibration
Weight
∆V_o
Reg_line
Regload
Vn
t_tr
η
ƒo
Ta
θ_ja
Ts
—
—
—
Conditions
Over Vin range
Vo=-5V
Vo=-6V
V_o=-7, -8, -9V
Vo=-10V
Vo=-12V
V_o=-13.9, -15V
Vin=10V
Vin=10V
On start-up
0.1 ≤ Io ≤ Imax
Vo=-5V
Vo=-6, -7, -8, -9V
V_o=-10, -12V
Vo=-13.9, -15V
Over V_in range
Ta=-20°C to +70°C
Over V_in range
0.1 ≤ Io ≤ Imax
Vin=10V, Io=Imax
50% load change
Vo over/undershoot
V_in=10V, I_o=0.5×I_max, V_o = -5V
Over Vin and Io ranges
Free Air Convection, (40-60LFM)
Over Vin Range
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
—
PT78NR100 SERIES
Min
Typ
Max
0.05 ⁽²⁾ —
1.00
0.05 (2) —
0.8
0.05 (2) —
0.55
0.05 ⁽²⁾ —
0.5
0.05 (2) —
0.40
0.05 (2) —
0.30
—
4×Imax
—
—
4
—
—
0.5
—
7
—
25
7
—
21
7
—
18
7
—
15
—
±1.0
±3.0
—
±0.5
±1.0
—
±0.5
±1.0
—
±2
—
—
100
250
—
5.0
—
—
75
—
600
650
700
-40
—
+85 ⁽³⁾
—
45
—
-40
—
+125
—
500
—
—
5
—
—
6.5
Units
A
Apk
A
mSec
V
V
V
V
%Vo
%V_o
%Vo
%Vo
µSec
%Vo
%
kHz
°C
°C/W
°C
G’s
G’s
Grams
Notes:
(1) The PT78NR100 Series requires a 100µF electrolytic or tantalum capacitor at both the input and output for proper operation in all applications. The input
capacitor, C1 must have a ripple current rating ≥600 mArms, and an ESR ≤0.2Ω.
(2) The ISR will operate down to no load with reduced specifications.
(3) See Thermal Derating chart.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends