GS-R400V/2 [STMICROELECTRONICS]
SMALL SIZE STEP-DOWN SWITCHING REGULATOR FAMILY; 小尺寸的降压型开关稳压器系列
| 型号： | GS-R400V/2 |
| 厂家： | 
ST |
| 描述： | SMALL SIZE STEP-DOWN SWITCHING REGULATOR FAMILY |
| 文件： | 总3页 (文件大小：93K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
GS-R400/2 Family
SMALL SIZE STEP-DOWN
SWITCHING REGULATOR FAMILY
FEATURES
MTBF in excess of 500,000 hours
4A max output current
40V max input voltage
4V max drop-out voltage
Soft start
Non-latching short circuit protection
Crow-bar output overvoltage protection
DESCRIPTION
The GS-R400/2 series is a family of small sized
high current, high voltage step-down switching
regulators.
The integral heatsink allows a large power handling
capability and it provides also an effective shielding
to minimize EMI.
SELECTION CHART
Regulation
Type
Ordering
Number
Output
Voltage
(V)
Input
Voltage
(V)
Output
Ripple
(mVpp)
Efficiency
(%)
Notes
Line
Load
(mV/A)
(mV/V)
GS-R405/2
GS-R412/2
GS-R415/2
GS-R424/2
GS-R400V/2
9 to 40
16 to 40
Fixed output voltage
5.1 ± 2%
12.0 ± 4%
15.0 ± 4%
24.0 ± 4%
5.1 to 24
25
50
2
20
40
80
85
5
6
"
19 to 40
65
60
87
"
28 to 40
100
6
80
90
"
Vo+4 to 40
Progr. output voltage
25 to 100
2 to 6
20 to 80
80 to 90
Note : Line regulation is measured at I =1A.
out
Load regulation is measured at V =V +8V and I =0.5 to 1.5A.
in
o
out
Case temperature must be kept below 85° C
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
DC Input Voltage
V
42
4
V
A
i
Output Current
I
o
Storage Temperature Range
T
– 40 to +105
– 20 to +85
°C
°C
stg
Operating Case Temperature Range
T
cop
June 1994
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GS-R400/2 FAMILY
CONNECTION DIAGRAM AND MECHANICAL DATA
Pin 5 GS-R400V/2 only
Dimensions in mm
Bottom view
PIN DESCRIPTION
Pin
Function
+ Input
Description
DC input voltage. Recommended maximum voltage is 40V.
Return for input voltage source.
1
2
3
4
5
Input GND
Output GND
+ Output
Return for output current path. Internally connected to pin 2.
Regulated DC output voltage.
Program
A resistor (<10kΩ) connected between this pin and pin 4 sets the + output voltage of the
GS-R400V/2.
ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise specified)
Symbol
Parameter
Temperature Stability
Output Current
Test Conditions
V = V +8V I = 1A
Min
Typ
Max
Unit
∆V /∆T
0.2/0.6
mV/°C
A
i
o
o
o
V = V +8V
I
o
0.1
4
8
i
o
Current Limit
V = V +8V
i o
I
oL
5
0.1
A
Average Input Current
Switching Frequency
Supply Voltage Rejection
Ripple Voltage
V = 40V Output Shorted
i
I
0.2
A
isc
I = 1A
o
f
s
100
kHz
mV/V
mVpp
ms
f = 100Hz Io = 1A
o
S
VR
4/12
25/100
10/35
5
I = 1A
o
V
r
Soft Start Time
t
ss
cb
Crowbar Delay Time
Crowbar Intervention Threshold
Thermal Resistance
t
µs
V
cth
V •1.25
o
V
Case to ambient
R
8
°C/W
th
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GS-R400/2 FAMILY
USER NOTES
Input Voltage
and the PCB layout must minimize injected noise.
The value of the resistor is calculated by using the
following formula:
The recommended operating maximum DC input
voltage is 40V inclusive of the ripple voltage.
V
o
R = 2.67
v
− 1 kΩ
5.1
Case Grounding
The module case is internally connected to pin 2
and pin 3.
V can be adjusted between 5.1 and 24V.
o
The PCB area below the module can be used as an
effective sixth side shield against EMI.
Module Protection
The modules are protected against occasional and
permanent short circuits of the output pins to
ground. During short circuit (when the output cur-
rent exceeds the maximum value) the output is
automatically disabled. Aftera fixed time themodule
starts again in a soft mode. The cycle is repeated
until the short circuit condition is removed.
Thermal Characteristics
The case-to-ambient thermal resistance of all the
GS-R400/2 modules is about 8°C/W. This produces
a 32°C temperature increase of the module surface
for 4W of internal power dissipation.
Depending on the ambient temperature and/or on
the power dissipation, an additional heatsink or
forced ventilation may be required.
The module can be permanently damaged if the
case temperature exceeds 85° C
Input Impedance
Power Derating Curve
The module has an internal capacitor connected
between the input pins in order to assure PWM
stability. This capacitor cannot handle large values
of high frequency ripple current and it can be per-
manently damaged if the primary energy source
impedance is not adequate.
The use of an external low ESR, high ripple current
capacitor located as close the module as possible
is recommended.
Suitable capacitors should have a RMS current
capability of 2.5 A
DC
with a working voltage of 50
RMS
V
and an ESR of 0,1Ω at 100kHz. When space
is a limitation a 22µF ceramic multilayer capacitor
must be connected to the module input pins.
Output Voltage Programming
The GS-R400V/2 output voltage is programmed by
using a resistor.
The resistor must be located very close the module
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specification mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use ascritical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectronics.
© 1994 SGS-THOMSON Microelectronics – All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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