78ST235VC [TI]
2 AMP POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR; 2放大器正降压集成开关稳压器
| 型号： | 78ST235VC |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 2 AMP POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR |
| 文件： | 总4页 (文件大小：216K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
For assistance or to order, call (800) 531-5782
7 8 S T 2 0 0 S e r i e s
2 AMP POSITIVE STEP-DOWN
INTEGRATED SWITCHING REGULATOR
Revised 6/30/98
The 78ST200 is a series of wide
• High Efficiency > 82%
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.
• Wide Input Range
• Self-Contained Inductor
• Short-Circuit Protection
• Over-Temperature Protection
• Fast Transient Response
The 78ST200 series regulators
have internal short-circuit and over-
temperature protection and may be
used in a wide variety of applications.
Pin-Out Information
Ordering Information
78ST2
C
XX
Y
Pin No. Function
1
2
3
V
in
Standard Application
GND
Vout
Output Voltage
Package Suffix
V = Vertical Mount
S = Surface Mount
H = Horizontal
Mount
33 = 3.3 Volts
35 = 3.45 Volts
05 = 5.0 Volts
Vin
Vout
GND
1
3
78ST200
2
+
C1
GND
C2
(For dimensions and PC board
layout see Package Style 500.)
C1 = Optional 1µF ceramic
C2 = Required 100µF electrolytic
Specifications
78ST200 SERIES
Characteristics
(Ta = 25°C unless noted)
Symbols
Io
Conditions
Min
Typ
Max
Units
Output Current
Over Vin range
Io = 0.1 to 3.0A
0.1*
—
2.0
A
Input Voltage Range
Vin
Vo < 3.5V
Vo = 5.0V
7
8
—
—
15
20
V
V
Output Voltage Tolerance
∆Vo
Over Vin range, Io = 2.0A
Ta = 0°C to +60°C
—
±1.0
±2.0
%Vo
Line Regulation
Load Regulation
Ripple/Noise
Regline
Regload
Vn
Over Vin range
—
—
—
—
±0.4
±0.2
1
±0.8
±0.4
—
%Vo
%Vo
%Vo
0.1 ≤ Io ≤ 2.0A
Vin = Vin min, Io = 2.0A
Transient Response
(with 100µF output cap)
ttr
50% load change
Vo over/undershoot
100
5.0
—
µSec
%Vo
Efficiency
η
Vin = 9V, Io = 2.0A, Vo = 5V
Over Vin and Io ranges
—
82
—
%
Switching Frequency
ƒo
0.95
1.0
1.05
MHz
Absolute Maximum
Operating Temperature Range
Ta
—
-40
—
+85
°C
Recommended Operating
Temperature Range
Ta
Free Air Convection, (40-60LFM)
Over Vin and Io ranges
-40
—
+85**
°C
Thermal Resistance
Storage Temperature
Mechanical Shock
θja
Ts
—
—
Free Air Convection, (40-60LFM)
—
—
38
—
°C/W
°C
-40
—
—
+125
—
Per Mil-STD-883D, Method 2002.3
500
G’s
Mechanical Vibration
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz, soldered in a PC board
—
—
5
7
—
—
G’s
Weight
—
—
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.
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com
For assistance or to order, call (800) 531-5782
7 8 S T 2 0 0 S e r i e s
C H A R A C T E R I S T I C
D A T A
78ST233_ 3.3 VDC
78ST205_ 5.0 VDC
(See Note 1)
(See Note 1)
Efficiency vs Output Current
Efficiency vs Output Current
100
100
90
80
70
60
50
40
90
Vin
7.0V
Vin
7.5V
9.0V
80
8.0V
10.0V
12.0V
15.0V
12.0V
15.0V
20.0V
70
60
50
40
0.0
0.5
1.0
1.5
2.0
0.0
0.5
1.0
1.5
2.0
Iout (A)
Iout (A)
Ripple vs Output Current
Ripple vs Output Current
30
25
20
15
10
5
30
25
20
15
10
5
Vin
Vin
7.5V
7.0V
8.0V
9.0V
10.0V
12.0V
15.0V
12.0V
15.0V
20.0V
0
0
0.0
0.5
1.0
1.5
2.0
0.0
0.5
1.0
1.5
2.0
Iout (A)
Iout (A)
Thermal Derating (Ta) (See Note 2)
Thermal Derating (Ta) (See Note 2)
2.0
1.5
1.0
0.5
0.0
2.0
1.5
1.0
0.5
0.0
70°C
No Derating
@ 85°C
85°C
7
9
11
13
15
8
10
12
14
16
18
20
Vin (Volts)
Vin (Volts)
Power Dissipation vs Output Current
Power Dissipation vs Output Current
2.0
1.5
1.0
0.5
0.0
2.0
1.5
1.0
0.5
0.0
Vin
7.0V
Vin
7.5V
8.0V
9.0V
10.0V
12.0V
15.0V
12.0V
15.0V
20.0V
0.0
0.5
1.0
1.5
2.0
0.0
0.5
1.0
1.5
2.0
Iout (A)
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)
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com
PACKAGE OPTION ADDENDUM
www.ti.com
13-May-2005
PACKAGING INFORMATION
Orderable Device
78ST205HC
78ST205SC
78ST205SCT
78ST205VC
78ST233HC
78ST233SC
78ST233VC
78ST235HC
78ST235SC
78ST235VC
Status (1)
Package Package
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
Qty
Type
Drawing
NRND
SIP MOD
ULE
EFA
3
3
3
3
3
3
3
3
3
3
25
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
Call TI
Call TI
Call TI
Call TI
Call TI
Call TI
Call TI
Call TI
Call TI
Call TI
Level-1-215C-UNLIM
Level-1-215C-UNLIM
Call TI
NRND
SIP MOD
ULE
EFC
EFC
EFD
EFA
EFC
EFD
EFA
EFC
EFD
25
OBSOLETE SIP MOD
ULE
NRND
NRND
NRND
NRND
NRND
SIP MOD
ULE
25
25
25
25
Level-1-215C-UNLIM
Level-1-215C-UNLIM
Level-1-215C-UNLIM
Level-1-215C-UNLIM
Call TI
SIP MOD
ULE
SIP MOD
ULE
SIP MOD
ULE
SIP MOD
ULE
OBSOLETE SIP MOD
ULE
Call TI
OBSOLETE SIP MOD
ULE
Call TI
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan
-
The planned eco-friendly classification: Pb-Free (RoHS) or Green (RoHS
&
no Sb/Br)
-
please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
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In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
Addendum-Page 1
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