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78ST233 Datasheet(PDF) 1 Page - Texas Instruments

Part No. 78ST233
Description  2 AMP POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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78ST233 Datasheet(HTML) 1 Page - Texas Instruments

   
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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
2 AMP POSITIVE STEP-DOWN
INTEGRATED SWITCHING REGULATOR
78ST200
Series
Standard Application
C1 = Optional 1µF ceramic
C2 = Required 100µF electrolytic
Pin-Out Information
Pin No. Function
1Vin
2
GND
3Vout
Ordering Information
78ST2
C
Output Voltage
(For dimensions and PC board
layout see Package Style 500.)
XX
Y
33
= 3.3 Volts
35
= 3.45 Volts
05
= 5.0 Volts
Package Suffix
V
= Vertical Mount
S
= Surface Mount
H
= Horizontal
Mount
High Efficiency > 82%
Wide Input Range
Self-Contained Inductor
Short-Circuit Protection
Over-Temperature Protection
Fast Transient Response
The 78ST200 is a series of wide
input voltage, 3 terminal Integrated
Switching Regulators (ISRs). Employ-
ing a ceramic substrate, these ISRs
have a maximum output current of 2A.
The output voltage is laser trimmed
for high accuracy.
The 78ST200 series regulators
have internal short-circuit and over-
temperature protection and may be
used in a wide variety of applications.
78ST200
C2
+
Vout
GND
GND
Vin
C1
1
2
3
Specifications
Characteristics
78ST200 SERIES
(T
a = 25°C unless noted)
Symbols
Conditions
Min
Typ
Max
Units
Output Current
Io
Over Vin range
0.1*
2.0
A
Input Voltage Range
Vin
Io = 0.1 to 3.0A
Vo < 3.5V
7
15
V
Vo = 5.0V
8
20
V
Output Voltage Tolerance
∆Vo
Over Vin range, Io = 2.0A
±1.0
±2.0
%Vo
Ta = 0°C to +60°C
Line Regulation
Regline
Over Vin range
±0.4
±0.8
%Vo
Load Regulation
Regload
0.1
≤ Io ≤ 2.0A
±0.2
±0.4
%Vo
Ripple/Noise
Vn
Vin = Vin min, Io = 2.0A
1
%Vo
Transient Response
ttr
50% load change
100
µSec
(with 100µF output cap)
Vo over/undershoot
5.0
%Vo
Efficiency
η
Vin = 9V, Io = 2.0A, Vo = 5V
82
%
Switching Frequency
ƒo
Over Vin and Io ranges
0.95
1.0
1.05
MHz
Absolute Maximum
Ta
-40
+85
°C
Operating Temperature Range
Recommended Operating
Ta
Free Air Convection, (40-60LFM)
-40
+85**
°C
Temperature Range
Over Vin and Io ranges
Thermal Resistance
θ
ja
Free Air Convection, (40-60LFM)
38
°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
Grams
* ISR will operate down to no load with reduced specifications.
** See Thermal Derating chart.
Note: The 78ST200 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications.
Revised 6/30/98


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