®
RFS/RDS Series Data Sheet
20W SMT DC-DC Converters, 1.5 – 5 V Output
Applications
•
•
•
•
•
Distributed power architectures
Telecommunications equipment
LAN/WAN applications
Data processing
Industrial applications
Features
•
RoHS lead-free-solder and lead-solder-
exempted products are available
•
Basic isolation
•
1500 VDC i/o electric strength test voltage
•
High current density
•
Output overcurrent protection
•
Operating temperature up to 100 °C
•
Remote shutdown (primary referenced),
negative logic option available
•
Output voltage adjust, positive or negative
•
Low profile SMT design: 8.3 mm (RDS)
•
Excellent co-planarity (within 0.1 mm)
•
Safety-approved to IEC/EN 60950-1 and
UL/CSA 60950-1 2
nd
Ed.
Description
The RFS and RDS Series converters are low profile,
single output, DC-DC converters intended for SMT
placement and reflow soldering. The product
provides onboard conversion of standard telecom
and datacom input voltages to isolated low output
voltages. Proprietary patented manufacturing
processes with full process automation ensure
optimal product quality. These are very high
performance, cost effective converters with a very
small PCB footprint.
BCD.00017 Rev. AA, 18-Oct-2010
Page 1 of 18
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®
RFS/RDS Series Data Sheet
20W SMT DC-DC Converters, 1.5 – 5 V Output
Model Selection
Input
Voltage
VDC
36 – 75
36 – 75
36 – 75
36 – 75
36
3
– 75
36
3
– 75
36
3
– 75
36
3
– 75
Input
Current
A
0.35
0.45
0.65
0.55
0.65
0.65
0.65
0.65
Output
Voltage
V
1.5
1.8
1.8
2.5
3.3
3.3
5.0
5.0
Output Rated
Current
A
6.0
6.0
6.0
6.0
6.0
5.0
4.0
4.0
Output
Ripple/Noise
mVpp
70
70
75
75
75
75
50
50
Typical
Efficiency
%
77
79
80
83
85
83
87
87
Model
RFS06ZA-M6
1
RFS06ZB-M6
1
RDS06ZB-M6
1 2
RFS06ZD-M6
1
RFS06ZE-M6
1
RDS05ZE-M6
1 2
RFS04ZG-M6
1
RDS04ZG-M6
1 2
1
2
3
For products RoHS-compliant for all 6 substances, change the suffix
M6
to
M6G.
For negative shutdown logic, change
-M6
to
-NM6
or
-M6G
to
-NM6G
Products with V
i
= 33.5 – 75 V are also available: Replace
M6
by
S1.
Model numbers highlighted in yellow are not recommended for new designs.
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings may cause performance degradation, adversely affect long
term reliability and cause permanent damage to the converter. Specifications apply over specified input voltage,
output load, and temperature range, unless otherwise noted.
Parameter
Input voltage (V
i
)
Transient Input Voltage (V
it
)
Operating Case Temp. (T
C
)
Storage Temperature (T
S
)
ON/OFF Control Voltage (V
RC
)
Conditions/Description
Continuous
Transient, 100 ms
At 100% load
Referenced to –Vi
Min
36
–40
–55
–1.0
Max
75
100
100
120
5.5
Unit
VDC
VDC
°C
°C
V
Environmental and Mechanical
Specifications apply over specified input voltage, output load and temperature range, unless otherwise noted.
Parameter
Shock
Sinusoidal Vibration
Weight
Water Washing
MTBF of RFS models
MTBF of RDS models
Conditions/Description
IEC68-2-27
IEC68-2-6
Standard process
Per Bellcore TR-NWT-000332
(100% load @25
°C,
GB)
Yes
1 453 000
1 452 000
Min
Nom
Max
100
10
17
Unit
g
n
g
n
g
N/A
h
h
BCD.00017 Rev. AA, 18-Oct-2010
Page 2 of 18
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®
RFS/RDS Series Data Sheet
20W SMT DC-DC Converters, 1.5 – 5 V Output
Isolation
Specifications apply over specified input voltage, output load and temperature range, unless otherwise noted.
Parameter
Insulation Safety Rating
Electric Strength Test Voltage
Insulation Resistance
Insulation Capacitance
Conditions/Description
V
i
= 75 VDC
10
RFS models
RDS06ZB
RDS04ZG, RDS05ZE
8 200
4 700
2 200
Min
Nom
Basic
1 500
Max
Unit
N/A
VDC
MOhm
pF
Input Data
Specifications apply over specified input voltage, output load and temperature range, unless otherwise noted.
Parameter
Input Voltage (V
i
)
Input Current when Shutdown
Turn-On Input Voltage
Turn-Off Input Voltage RFS models
RDS models
Turn-On Time, RFS/RDS models
Conditions/Description
Continuous
V
i nom
, Remote Control
activated
Ramping up, I
o max
Ramping down, I
o max
To Output Regulation Band
After Remote Control
Rise Time
V
i max
, I
o max
Min
36
Nom
48
3
34
33
32
300/600
30/30
5/5
Max
75
10
36
35
34
Unit
VDC
mA
V
32
31
30
ms
Input Reflected Ripple Current
Input Capacitance
50
1.4
mA
pp
µF
BCD.00017 Rev. AA, 18-Oct-2010
Page 3 of 18
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®
RFS/RDS Series Data Sheet
20W SMT DC-DC Converters, 1.5 – 5 V Output
Output Data
RFS06ZA: 1.5 V / 6.0 A
All specifications apply over input voltage, output load and temperature range, unless otherwise noted.
Parameter
Output Voltage Setpoint
Accuracy
Output Current
Line Regulation
Load Regulation
Dynamic Regulation
Peak Deviation
Settling Time
Output Voltage Ripple
1
Admissible Load
Capacitance
Output Current Limit
Threshold
Switching Frequency
Temperature Coefficient
Trim Range
1
Conditions/Description
V
o
I
o
V
i nom
, I
o
= 3.0 A, 25
°C
V
i min
– V
i max
V
i min
– V
i max
, 50% I
o max
V
i nom
, I
o min
– I
o max
50 – 100% I
o max
load step
change.
to 1% error band
V
i min
– V
i max
, I
o max
20 MHz Bandwidth
I
o max
, V
i nom
V
o
≤0.90
V
o nom
V
i nom
, I
o max
I
o min
– I
o max
, V
i min
– V
i max
Min
1.48
0
Nom
1.5
Max
1.52
6.0
30
30
±150
1000
85
2200
Unit
V
A
mV
mV
mV
µs
mV
pp
µF
% I
o max
kHz
70
120
220
200
0.02
1.35
1.65
%V
o
/°C
V
Measured with a 1 µF capacitor across the ouput pins.
Typical Characteristic Curves
Output Voltage Vs Load
Vout (V)
1.60
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
10.80
12.00
0.00
1.20
2.40
3.60
4.80
6.00
7.20
8.40
9.60
Vin Min
Vin Nom
Vin Max
Efficiency
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.00
0.30
0.60
1.20
1.80
2.40
3.00
3.60
4.20
4.80
5.40
6.00
Efficiency Vs Load
Vin Min
Vin Nom
Vin Max
Iout (A)
Iout (A)
BCD.00017 Rev. AA, 18-Oct-2010
Page 4 of 18
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®
RFS/RDS Series Data Sheet
20W SMT DC-DC Converters, 1.5 – 5 V Output
RFS06ZB: 1.8 V / 6.0 A
All specifications apply over input voltage, output load and temperature range, unless otherwise noted.
Parameter
Output Voltage Setpoint
Accuracy
Output Current
Line Regulation
Load Regulation
Dynamic Regulation
Peak Deviation
Settling Time
Output Voltage Ripple
1
Admissible Load
Capacitance
Output Current Limit
Threshold
Switching Frequency
Temperature Coefficient
Trim Range
1
Conditions/Description
V
o
I
o
V
i nom
, I
o
= 3.0 A, 25
°C
V
i min
– V
i max
V
i min
– V
i max
, 50% I
o max
V
i nom
, I
o min
– I
o max
50 – 100% I
o max
load step
change.
to 1% error band
V
i min
– V
i max
, I
o max
20 MHz Bandwidth
I
o max
, V
i nom
V
o
≤0.90
V
o nom
V
i nom
, I
o max
I
o min
– I
o max
, V
i min
– V
i max
Min
1.78
0
Nom
1.8
Max
1.82
6.0
36
36
±150
1000
85
2200
Unit
V
A
mV
mV
mV
µs
mV
pp
µF
% I
o max
kHz
70
120
220
200
0.02
1.62
1.98
%V
o
/°C
V
Measured with a 1 µF capacitor across the ouput pins.
Typical Characteristic Curves
Output Voltage Vs Load
Vout (V)
2.00
1.80
1.60
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
10.80
12.00
0.00
1.20
2.40
3.60
4.80
6.00
7.20
8.40
9.60
Efficiency
90%
80%
70%
60%
50%
40%
Efficiency Vs Load
Vin Min
Vin Nom
Vin Max
30%
20%
10%
0%
0.00
0.30
0.60
1.20
1.80
2.40
3.00
3.60
4.20
Vin Min
Vin Nom
Vin Max
4.80
5.40
Iout (A)
BCD.00017 Rev. AA, 18-Oct-2010
Page 5 of 18
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6.00
Iout (A)
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