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參數(shù)資料
| 型號： | PT79ST253V |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX |
| 封裝： | VERTICAL MOUNT PACKAGE-3 |
| 文件頁數(shù)： | 1/2頁 |
| 文件大?。?/td> | 35K |
| 代理商： | PT79ST253V |
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.ti.com/powertrends
PT79ST2
Series
2.0 AMP NEGATIVE STEP-DOWN
INTEGRATED SWITCHING REGULATOR
The PT79ST2 Series are
Negative 3-terminal Integrated
Switching Regulators (ISR).
These ISRs have a maximum
output current of –2.0 Amps and
an output voltage that is laser
trimmed. They have excellent
line and load regulation with
internal short circuit and over-
temperature protection. With
high conversion efficiency,
these ISRs can power a diver-
sity of circuits used in a wide
variety of industrial applica-
tions.
C
2
+
C
3
C
1
PT79ST2
3
2
1
COM
V
out
V
in
Pin-Out Information
Pin
Function
1
GND
2–Vin
3–Vout
Ordering Information
PT79ST2 XX Y
Output Voltage
53
= –5.13 Volts
Package Suffix
V
= Vertical Mount
Standard Application
C1 = Optional ceramic (1F)
C2 = Required Electrolytic (100F)
C3 = Optional ceramic (1–5F)
High Efficiency
Self-Contained Inductor
Short Circuit Protection
Over-Temperature Protection
SLTS079
(Revised 5/31/2000)
Specifications
Characteristics
PT79ST2 SERIES
(T
a = 25°C unless noted)
Symbols
Conditions
Min
Typ
Max
Units
Output Current
Io
Over Vin range
–0.1*
—
–2.0
A
Short Circuit Current
Isc
Vin =Vo–3V
—
–3.5
—
Apk
Input Voltage Range
Vin
–0.1
≤ Io ≤ –2.0 Amp, Vo= –5.13V
–8
—
–20
V
Output Voltage Tolerance
Vo
Over Vin range, Io= –2.0 Amp
—
±1.0
±3.0
%Vo
Ta= 0°C to shutdown
Line Regulation
Regline
Over Vin range
—
40
75
mV
Load Regulation
Regload
–0.1
≤ Io ≤ –2.0 Amp
—
30
50
mV
Vo Ripple/Noise
Vn
Vin= –8V, Io= –2.0 A,Vo= –5.13V
—
70
—
mVpp
Transient Response
ttr
50% load change
—
100
—
Sec
(with req’d output capacitor)
Vo=over/undershoot
—
5
—
%Vo
Efficiency
η
Vin= –10V, Io= –2.0 A,Vo= –5.13V
—
85
—
%
Switching Frequency
o
Over Vin range, Io = –2.0A
600
650
700
kHz
Recommended Operating
Ta
Free Air Convection, (40-60LFM)
0—
+65
°C
Temperature Range
Over Vin and Io ranges
Thermal Resistance
θ
ja
Free Air Convection, (40-60LFM)
—
45
—
°C/W
Storage Temperature
Ts
—
-40
—
+125
°C
Mechanical Shock
—
Per Mil-STD-883D, Method 2002.3
—
500
—
G’s
Mechanical Vibration
—
Per Mil-STD-883D, Method 2007.2,
—5
—
G’s
20-2000 Hz, soldered in a PC board
Weight
—
7.0
—
Grams
* ISR will operate down to no load with reduced specifications.
(For dimensions and PC board
layout, see Package Style 500)
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