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PT79SR115T View Datasheet(PDF) - Texas Instruments

Part NamePT79SR115T TI
Texas Instruments TI
Description-1.5 AMP NEGATIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR


PT79SR115T Datasheet PDF : 8 Pages
1 2 3 4 5 6 7 8
PT79SR100 Series
-1.5 Amp Negative Step-Down
Integrated Switching Regulator
High Efficiency > 85%
Self-Contained Inductor
Short Circuit Protection
Over-Temperature Protection
The PT79SR100 is a line of
Negative Input/Negative Output
3-terminal Integrated Switching
SLTS061A
(Revised 6/30/2000)
Regulators (ISRs). These ISRs have a
maximum output current of -1.5 Amps
and an output voltage that is laser
trimmed to most industry standard volt-
ages. They have excellent line and load
regulation, and are ideal for applications,
such as RS232 and Ethernet communica-
tions, ECL logic, and op-amp circuitry.
Standard Application
COM
Pin-Out Information
COM
Pin Function
1 GND
2
-Vin
3
-Vout
C1
-Vin
1
D1
2 PT79SR1 3
C2
-Vout
C1 = Optional ceramic (1µF)
C2 = Optional ceramic (1-5µF)
D1 = Zener diode required to clamp
turn-on overshoot
(See Application Note)
Specifications
Characteristics
(Ta = 25°C unless noted)
Output Current
Short Circuit Current
Input Voltage Range
Output Voltage Tolerance
Symbols
Io
Isc
Vin
Vo
Line Regulation
Load Regulation
Vo Ripple/Noise
Transient Response
Regline
Regload
Vn
ttr
Efficiency
η
Switching Frequency
ƒo
Absolute Maximum
Ta
Operating Temperature Range
Recommended Operating
Ta
Temperature Range
Thermal Resistance
θja
Temperature Coefficient
Tc
Storage Temperature
Ts
Mechanical Shock
Mechanical Vibration
Weight
* ISR will operate down to no load with reduced specifications.
Pkg Style 500
Conditions
Over Vin range
Vin=Vo-4V
Io=-0.1 to -1.5 A
-0.1 Io -1.5 A
Vo=-5V
Vo=-15V
Over Vin range, Io=-1.5 A
Ta=-20°C to shutdown
Over Vin range
-0.1 Io -1.5 A
Vin=-15V, Io=-1.0 A,Vo=-5V
50% load change
Vo=overshoot/undershoot
Vin=-10V, Io=-1.0A, Vo=-5V
Over Vin and Io ranges
Free Air Convection, (40-60LFM)
Over Vin and Io ranges
Free Air Convection, (40-60LFM)
Over Vin and Io ranges
Per Mil-STD-883D, Method 2002.3
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz, soldered in a PC board
** See Thermal Derating chart.
Ordering Information
PT79SR1 XX Y
Output Voltage
05 = -5.0 Volts
52 = -5.2 Volts
06 = -6.0 Volts
08 = -8.0 Volts
09 = -9.0 Volts
12 = -12.0 Volts
15 = -15.0 Volts
Package Suffix
V = Vertical Mount
S = Surface Mount
H = Horizontal
Mount
PT79SR100 SERIES
Min
Typ
-0.1*
-3.5
-9
-19
±1.0
±1.0
±0.5
35
100
30
85
0.95
1.0
-40
-40
45
±0.5
-40
500
5
7.0
Max
-1.5
-30
-30
±3.0
±2.0
±1.0
1.05
+85
+60**
±1.5
+125
Units
A
Apk
V
V
%Vo
%Vo
%Vo
mVpp
µSec
%Vo
%
MHz
°C
°C
°C/W
mV/°C
°C
G’s
G’s
Grams
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
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Description
The PT79SR100 is a line of Negative Input/Negative Output 3-terminal Integrated Switching Regulators (ISRs). These ISRs have a maximum output current of -1.5 Amps and an output voltage that is laser trimmed to most industry standard volt
ages. They have excellent line and load regulation, and are ideal for applications,such as RS232 and Ethernet communications, ECL logic, and op-amp circuitry.

Features
• High Efficiency > 85%
• Self-Contained Inductor
• Short Circuit Protection
• Over-Temperature Protection

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