1. For input voltages higher than 30 Vdc, a 22 µF / 50 V input capacitor is required.
2. Tested at nominal input, 20~100% load, 20 MHz bandwidth, with 10 µF electrolytic and 1 µF ceramic capacitor on the output. At loads below 20%, the max ripple and
noise of the 3.3 & 5 Vdc outputs will be 100 mVp-p, and the other outputs will be 2% Vo.
3. Measured at min Vin, full load.
4. All specifications are measured at Ta=25°C, humidity < 75%, nominal input voltage, and rated output load unless otherwise specified.
PART NUMBER KEY
VX78
XX
-
1000
Base Number
Output Voltage
Output Current
cui.com
For more information, please visit the
product page.
CUI Inc
│
SERIES:
VX78-1000
│
DESCRIPTION:
NON-ISOLATED DC SWITCHING REGULATOR
date
05/18/2017
│
page
2 of 8
INPUT
parameter
operating input voltage
1
filter
no-load input current
Note:
conditions/description
for positive output applications
for negative output applications
capacitor filter
positive outputs
min
6
8
typ
24
12
max
36
27
units
Vdc
Vdc
input reverse polartiy protection no
0.1
1
mA
1. See Model section on page 1 for specific input voltage ranges.
OUTPUT
parameter
maximum capacitive load
2
voltage accuracy
line regulation
load regulation
switching frequency
transient recovery time
transient response deviation
temperature coefficient
Note:
conditions/description
for positive output applications
for negative output applications
at full load, input voltage range
3.3 Vdc output model
all other models
at full load, input voltage range
at nominal input, 10~100% load
at nominal input voltage, full load
3.3/5 Vdc output models
all other models
at nominal input voltage, 25% load step change
at nominal input voltage, 25% load step change
at full load
min
typ
max
680
330
units
μF
μF
%
%
%
%
kHz
kHz
ms
mV
%/°C
±2
±2
±0.2
±0.4
420
580
520
680
0.1
50
±4
±3
±0.4
±0.6
620
780
1
300
±0.03
2. The maximum capacitive load was tested at nominal input voltage, full load.
PROTECTIONS
parameter
short circuit protection
conditions/description
continuous, auto recovery
min
typ
max
units
SAFETY AND COMPLIANCE
parameter
safety approvals
EMI/EMC
conducted emissions
radiated emissions
ESD
radiated immunity
EFT/burst
surge
conducted immunity
MTBF
RoHS
conditions/description
UL 60950-1
EN 55032, EN 55024
CISPR22/EN55022, class B (external circuit required, see Figure 4-b)
CISPR22/EN55022, class B (external circuit required, see Figure 4-b)
IEC/EN61000-4-2, contact ± 4kV, class B
IEC/EN61000-4-3, 10V/m, class A
IEC/EN61000-4-4, ± 1kV, class B (external circuit required, see Figure 4-a)
IEC/EN61000-4-5, line-line ± 1kV, class B (external circuit required, see Figure 4-a)
IEC/EN61000-4-6, 3 Vr.m.s, class A
as per MIL-HDBK-217F, 25°C
2011/65/EU
2,000,000
hours
min
typ
max
units
cui.com
For more information, please visit the
product page.
CUI Inc
│
SERIES:
VX78-1000
│
DESCRIPTION:
NON-ISOLATED DC SWITCHING REGULATOR
date
05/18/2017
│
page
3 of 8
ENVIRONMENTAL
parameter
operating temperature
storage temperature
storage humidity
non-condensing
conditions/description
see derating curve
min
-40
-55
5
typ
max
85
125
95
units
°C
°C
%
SOLDERABILITY
parameter
wave soldering
conditions/description
see wave soldering profile
Peak Temp. 260°C Max.
250
Wave Soldering Time
4 Sec. Max.
min
typ
max
260
units
°C
200
Temperature (°C)
10 Sec. Max.
150
100
50
0
MECHANICAL
parameter
dimensions
case material
weight
Time (sec.)
conditions/description
11.50 x 9.00 x 17.50 [0.453 x 0.354 x 0.689 inch]
black flame-retardant heat-proof plastic (UL94V-0)
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Embedded System
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