= +40°C nominal input voltage unless otherwise specified.
PARAMETER
INPUT
Voltage Range
Input Reflected Ripple Current
Maximum Input Current
No Load Input Current
On/Off Activated Input Current
Input Undervoltage Lockout
Turn On
Turn Off
Input Overvoltage Lockout
Turn Off
Turn On
SYMBOL
MIN
36
TYP
48
MAX
75
325
2
60
25
36
33
84
82.5
UNITS
VDC
mA
A
mA
mA
VDC
VDC
VDC
VDC
INPUT
Peak - Peak
Vin = 30V, Pout 50W
30
27
76
74.5
33
30
80
78.5
PARAMETER
Output Power
Output Efficiency
Set Point Voltage
V1 (2.5V)
V2 (3.3V)
Output Current
V1 (2.5V)
V2 (3.3V)
Output Ripple And Noise Voltage
V1 (2.5V)
V2 (3.3V)
Output Adjust Range
CONDITIONS
Io1=10A, Io2=7.5A
Io1=10A
Io2=7.5A
Total Module Output
Power Should Not
Exceed 50 Watts
100 MHz BW
MIN
88
2.460
3.290
0
0
TYP
MAX
50
UNITS
Watts
%
V
DC
V
DC
A
A
mV
P-P
mV
P-P
%
Under any conditions, the voltage of V1 will always be greater or equal to that of V2.
2.5
3.3
2.530
3.360
20
15
60
80
+10
Both Outputs Will Adjust
at the Same Time and
by the Same %
V
IN
= 36 to 75
I
1
=10A, I
2
=7.5A
I
1
= 0 to 20A, I
2
=0A
I
1
=0A, I
2
=0 to 15.15A
I
1
= 0A, I
2
=0 to 15.15A
I
1
=0 to 20A, I
2
=0A
-8
Output Temperature Drift
Line Regulation
Load Regulation
V1 (2.5V)
V2 (3.3V)
Load Cross Regulation
V1 (2.5V)
V2 (3.3V)
Output Current Limit Inception
V1 (2.5V)
V2 (3.3V)
Short Circuit Current
V1 (2.5V)
V2 (3.3V)
Output Overvoltage Set Point
(Non-latching independent
control loop)
V1 (2.5V)
V2 (3.3V)
Transient Response
Settling Time
Peak Deviation
Switching Frequency
0.02
0.10
0.05
0.20
% /°C
%
4
2.5
1.5
3.5
21.0
16.0
19.0
14.0
24.0
17.5
23.0
18.0
28.0
22.0
28.0
22.0
% of Nom
% of Nom
% of Nom
% of Nom
A
A
A
A
OUTPUT
2.70
3.60
(∆Ιο/∆t=0.2A/µsec either
output) Load change of 40%
of
Ιο
max at any operating
load up to
Ιο
max and Pο max
2.90
3.90
3.25
4.30
100
4
V
DC
V
DC
µsec
%
KHz
330
Product: www.cdpowerelectronics.com
VSX50MD23
REV B
5/02
2
PARAMETER
ISOLATION SPECIFICATIONS
Input to Output
Input to Case
Output to Case
Resistance Input to Output
Capacitance Input to Output
Leakage Current
FEATURE SPECIFICATIONS
Remote On/Off
(open collector equivalent,
signal referenced to –V
IN
terminal)
VSX50MD23 Preferred Logic (negative)
Logic Low – Module On
Logic High – Module Off
VSX50MD23-1 Optional Logic (Positive)
Logic Low – Module Off
Logic High – Module On
SYMBOL
MIN
1500
1500
200
10
TYP
MAX
UNITS
V
DC
V
DC
V
DC
MΩ
pF
µA,
rms
V
ISO
= 240V
AC
, 60Hz
1000
90
GENERAL
Von/off Low
Von/off High
Ιon/off
Turn On Time
From Application of V
IN
From Remote On/Off Activation
Weight
VSX50MD23, VSX50MD23-1
VSX50MD23-U, VSX50MD23-1U
TEMPERATURE
Operation /Specification
Storage
Shutdown
Shutdown (Hysteresis)
Thermal Impedance
(Case to Ambient)
(V
O
within 1% of
steady state)
0
2
0.4
Open Collector
200
7
3
67
44
10
4
V
DC
V
DC
µA
mSecs
mSecs
Grams
Grams
Case
Case
Case
Free Air
-40
-55
+105
+115
10
12.2
+100
+125
+125
°C
°C
°C
°C
° C/Watt
Product: www.cdpowerelectronics.com
VSX50MD23
REV B
5/02
3
GRAPHS
EFFICIENCY VS. OUTPUT LOAD
LOAD REGULATION VS. LOAD DISTRIBUTION
EFFICIENCY VS. INPUT VOLTAGE
EFFICIENCY VS. BASEPLATE TEMPERATURE
OUTPUT VOLTAGE RIPPLE VS.
TEMPERATURE AT FULL LOAD
FULL LOAD EFFICIENCY VS. LOAD DISTRIBUTION
REFLECTED RIPPLE VS. INPUT VOLTAGE
OUTPUT RIPPLE VS. LOAD
Product: www.cdpowerelectronics.com
VSX50MD23
REV B
5/02
4
MECHANICAL
Dimensions are in inches (millimeters).
Tolerances: x.xx in. + 0.02 in.
x.xxx in. +0.01 in.
2.30
(58.42)
CASE OUTLINE
0.144 (3.66)
4 PLACES
.600
(15.24)
1.50
(38.10)
.350
(8.89)
.000
.350
(8.89)
1
2
3
7
6
5
4
.375 (9.53)
.125 (3.18)
.125 (3.18)
.375 (9.53)
0.051 (1.30)
7 PLACES
.600
(15.24) .750
(19.05)
.50
(12.70)
.150
(3.81)
.000
.145
(3.68)
.150
(3.81)
0.040 (1.02) 7 PLACES
2.000
(50.80)
Pinout Key
1.200
(30.48)
1
2
3
4
5
6
7
+Vin
On/Off
-Vin
+2.5 Vout
O/P RTN
Trim
+3.3 Vout
RECOMMENDED PCB HOLE PATTERN
(VIEW OF PCB, THROUGH UNIT)
NOTES:
1.
Marked with: specific model ordered, date
code, job code.
2.
MATERIAL: Units are encapsulated in a low
thermal resistance molding compound which has
excellent chemical resistance and electrical
properties in high humidity environments and
over a wide operating temperature range. The
encapsulant and outer shell of the unit have
UL94V-0 ratings. Lead material is solder plated
to allow ease of solderability.
3. IMPORTANT:
When utilizing the PEM nuts for
board mounting, it is required to follow guidelines
in application note DCAN-41 available on the
web at www.cdpowerelectronics.com.
PIN 1
.150
(3.81)
M3 THREAD
4 PLACES
ORDERING INFORMATION
To Find Model Number
VSX50MD23 - 1 U
Device Family
VSX50MD23 (Quarter Brick, 50 Watt DC/DC)
Logic: No Number = Preferred Logic (Negative);
1 = Optional Logic (Positive)
Package
No Letter = Encapsulated; U = Unencapsulated
Model Numbers
VSX50MD23
VSX50MD23-U
VSX50MD23-1
VSX50MD23-1U
Power Electronics Division, United States
3400 E Britannia Drive, Tucson, Arizona 85706
Tel: 800.547.2537 Fax: 520.295.4160
C&D Technologies, (NCL)
Milton Keynes MK14 5BU UK
Tel: +44 (0)1908 615232 Fax: +44 (0)1908 617545
Any data, prices, descriptions or specifications presented herein are subject to revision by C&D Technologies, Inc. without notice. While such information is believed to
be accurate as indicated herein, C&D Technologies, Inc. makes no warranty and hereby disclaims all warranties, express or implied, with regard to the accuracy or
completeness of such information. Further, because the product(s) featured herein may be used under conditions beyond its control, C&D Technologies, Inc. hereby
disclaims all warranties, either express or implied, concerning the fitness or suitability of such product(s) for any particular use or in any specific application or arising
from any course of dealing or usage of trade. The user is solely responsible for determining the suitability of the product(s) featured herein for user’s intended purpose
and in user’s specific application. C&D Technologies, Inc. does not warrant or recommend that any of its products be used in any life support or aviation or aerospace
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