Texas Instruments 78ST233VC, 78ST233SC, 78ST233HC, 78ST205VC, 78ST205SC Datasheet
...
For assistance or to order, call (800) 531-5782
78ST200 Series
2 AMP POSITIVE STEP-DOWN
INTEGRATED SWITCHING REGULATOR
Revised 6/30/98
Standard Application
Vin
C1
1
78ST200
2
C1 = Optional 1µF ceramic
C2 = Required 100µF electrolytic
• 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). Employing 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 overtemperature protection and may be
used in a wide variety of applications.
Pin-Out Information
Pin No. Function
1V
in
2 GND
3V
out
C2
Vout
+
GNDGND
3
Ordering Information
78ST2 C
Output Voltage
33 = 3.3 Volts
35 = 3.45 Volts
05 = 5.0 Volts
(For dimensions and PC board
layout see Package Style 500.)
Y
XX
Package Suffix
V = Vertical Mount
S = Surface Mount
H = Horizontal
Mount
Specifications
Characteristics
(Ta = 25°C unless noted) Symbols Conditions Min Typ Max Units
Output Current I
Input Voltage Range V
Output Voltage Tolerance ∆V
Line Regulation Reg
Load Regulation Regload 0.1 ≤ Io ≤ 2.0A — ±0.2 ±0.4 %V
Ripple/Noise V
Transient Response t
(with 100µF output cap) Vo over/undershoot 5.0 %V
Efficiency η V
Switching Frequency ƒ
Absolute Maximum T
Operating Temperature Range
Recommended Operating T
Temperature Range Over Vin and Io ranges
Thermal Resistance θ
Storage Temperature T
Mechanical Shock — Per Mil-STD-883D, Method 2002.3 — 500 — G’s
Mechanical Vibration — Per Mil-STD-883D, Method 2007.2,
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.
o
in
o
line
n
tr
o
a
a
ja
s
Over Vin range 0.1* — 2.0 A
Io = 0.1 to 3.0A Vo < 3.5V 7 — 15 V
Over Vin range, Io = 2.0A
Ta = 0°C to +60°C
Over Vin range — ±0.4 ±0.8 %V
Vin = V
min, I
in
50% load change — 100 — µSec
= 9V, Io = 2.0A, Vo = 5V — 82 — %
in
Over Vin and Io ranges 0.95 1.0 1.05 MHz
— -40 — +85 °C
Free Air Convection, (40-60LFM)
Free Air Convection, (40-60LFM) — 38 — °C/W
— -40 — +125 °C
20-2000 Hz, soldered in a PC board
Vo = 5.0V 8 — 20 V
= 2.0A — 1 — %Vo
o
78ST200 SERIES
— ±1.0 ±2.0 %Vo
-40 —
—5 —G’s
+85**
o
o
o
°C
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com
CHARACTERISTIC DATA
For assistance or to order, call (800) 531-5782
78ST200 Series
78ST233_ 3.3 VDC
(See Note 1)
Efficiency vs Output Current
100
90
80
70
60
Efficiency (%)Ripple (mV)
50
40
0.0 0.5 1.0 1.5 2.0
Iout (A)
Ripple vs Output Current
30
25
20
15
10
5
0
0.0 0.5 1.0 1.5 2.0
Iout (A)
78ST205_ 5.0 VDC
(See Note 1)
Efficiency vs Output Current
100
90
Vin
7.0V
8.0V
10.0V
12.0V
15.0V
80
70
60
Efficiency (%)Ripple (mV)
50
40
0.0 0.5 1.0 1.5 2.0
Iout (A)
Ripple vs Output Current
30
25
Vin
7.0V
8.0V
10.0V
12.0V
15.0V
20
15
10
5
0
0.0 0.5 1.0 1.5 2.0
Iout (A)
Vin
7.5V
9.0V
12.0V
15.0V
20.0V
Vin
7.5V
9.0V
12.0V
15.0V
20.0V
Thermal Derating (Ta) (See Note 2)
2.0
1.5
1.0
Iout (A)
0.5
0.0
7 9 11 13 15
No Derating @ 85°C
Vin (Volts)
Power Dissipation vs Output Current
2.0
1.5
1.0
PD (Watts)
0.5
0.0
0.0 0.5 1.0 1.5 2.0
Iout (A)
Note 1: All data listed in the above graphs, except for derating data, has been developed from actual products tested at 25°C. This data is considered typical data for the ISR.
Note 2: Thermal derating graphs are developed in free air convection cooling of 40-60 LFM. (See Thermal Application Note)
Vin
7.0V
8.0V
10.0V
12.0V
15.0V
Thermal Derating (Ta) (See Note 2)
2.0
1.5
1.0
Iout (A)
0.5
0.0
8 101214161820
Vin (Volts)
70°C
85°C
Power Dissipation vs Output Current
2.0
1.5
1.0
PD Watts)
0.5
0.0
0.0 0.5 1.0 1.5 2.0
Iout (A)
Vin
7.5V
9.0V
12.0V
15.0V
20.0V
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com
Loading...