NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc -14 Vdc Input
0.75 Vdc - 5.0 Vdc/6 A Output
xRBA-06E2Ax Series
•
•
•
•
•
•
Non-Isolated
High Efficiency
High Power Density
Fixed Frequency
RoHS Compliant
•
•
•
•
•
Rev.A
Under-voltage Lockout (UVLO)
Remote On/Off
OCP/SCP
Wide Input
Wide Trim Range
Flexible Output Voltage Sequencing
UL60950-1 Recognized (UL/cUL)
Description
The Bel xRBA-06E2Ax modules are a series of non-isolated dc/dc converters that can deliver up to 6 A of output
current with full load efficiency of 92% at 5.0 Vdc output. These modules provide precisely regulated voltage
programmable via external resistor from 0.75 Vdc to 5.0 Vdc over a wide range of input voltage. These modules
have a sequencing feature that enables designers to implement various types of output voltage sequencing when
powering multiple voltages on a board. Their open-frame construction and small footprint enable designers to
develop cost and space-efficient solutions. Standard features include remote On/Off, programmable output
voltage and over current protection.
Part Selection
Output
Voltage
5.0 V
0.75 V - 3.3 V
1
Input
Voltage
7.0 V - 14 V
4.5 V - 14 V
Max. Output
Current
6A
6A
Max. Output
Power
30.0 W
19.8 W
Typical
Efficiency
92%
88%
Model Number
Surface Mount
SRBA-06E2Ax
SRBA-06E2Ax
Model Number
Vertical Mount
VRBA-06E2Ax
VRBA-06E2Ax
Notes:
1. These modules use a buck topology, so the output voltages must be 0.5 V less than the input voltage.
2. Use “0” to replace “x” for remote on/off active high logic and use “L” for active low logic. Change the
last character “L” to “C” to indicate 0.20’’ pin length. Add “G” suffix at the end of the model numbers to
indicate Tray Packaging.
3. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers.
Absolute Maximum Ratings
Parameter
Input Voltage (continuous)
Output Enable Terminal Voltage
Sequencing Voltage
1
Min
-0.3 V
-0.3 V
-0.3 V
-40
°C
-55
°C
Typ
-
-
-
-
-
Max
15 V
15 V
Vin
85
°C
125
°C
Notes
Ambient Temperature
Storage Temperature
Notes:
All specifications are typical at 25
°C
unless otherwise stated.
1. xRBA-06E2Ax series of modules include a sequencing feature that enables users to implement various
types of output voltage sequencing in their applications. This is accomplished via an additional
sequencing pin. When the sequencing feature is not used, tie the SEQ pin to Vin.
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
•
Tel 201-432-0463
•
Fax 201-432-9542
•
www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc -14 Vdc Input
0.75 Vdc - 5.0 Vdc/6 A Output
Min
4.5 V
7.0 V
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Typ
12 V
12 V
2.75 A
1.85 A
1.05 A
0.55 A
-
-
3 mA
120 mA
60 mA
0.002 A s
4.3 V
6.0 V
4.0 V
5.5 V
2
Input Specifications
Parameter
Input Voltage
Vo, set≤3.3 V
Vo, set=5.0 V
Input Current (full load)
Vo=5.0 V
Vo=3.3 V
Vo=1.8 V
Vo=0.75 V
Input Current (no load)
Vo=5.0 V
Vo=0.75 V
Remote Off Input Current
Input Reflected Ripple Current (pk-pk)
Input Reflected Ripple Current (rms)
I t Inrush Current Transient
Turn-on Voltage Threshold
Vo, set≤3.3 V
Vo, set=5.0 V
Turn-off Voltage Threshold
Vo, set≤3.3 V
Vo, set=5.0 V
2
Max
14 V
14 V
4.8 A
4.8 A
3.2 A
1.8 A
100 mA
20 mA
5 mA
200 mA
100 mA
0.02 A s
4.5 V
6.5 V
4.3 V
6.0 V
2
Notes
With simulated source impedance of 1
uH, 5 Hz to 20 MHz and two 100 uF/25
V external input tantalum capacitors.
Shut down or below 90% set point.
Output Specifications
Parameter
Output Voltage Set Point
1
Output Voltage Set Point
Load Regulation
Line Regulation
Regulation Over Temperature
(-40
°C
to +85
°C)
Output Current
Current Limit Threshold
Short Circuit Surge Transient
Ripple and Noise (pk-pk)
Vo=5.0 V
Vo=3.3 V
Vo=0.75 V
Ripple and Noise (rms)
Vo=5.0 V
Vo=3.3 V
Vo=0.75 V
Turn on Time
Overshoot at Turn on
Output Capacitance
ESR
≥
1mohm
ESR
≥
10mohm
Transient Response
50% ~ 100% Max Load
Settling Time
All outputs
100% ~ 50% Max Load
Settling Time
Min
-2%Vo,set
-2.5%Vo,set
-0.7%Vo,set
-0.7%Vo,set
-
0A
6.8 A
-
-
-
-
-
-
-
-
-
0 uF
0 uF
-
-
-
-
Typ
-
-
0.4%Vo,set
0.3%Vo,set
0.5%Vo,set
-
-
2
0.25 A s
100 mV
80 mV
35 mV
35 mV
25 mV
10 mV
6 mS
0%
-
-
200 mV
25 uS
200 mV
25 uS
Max
2%Vo,set
3.5%Vo,set
0.7%Vo,set
0.7%Vo,set
-
6A
15 A
-
140 mV
120 mV
7 0 mV
50 mV
40 mV
15 mV
12 mS
3%
1000 uF
2200 uF
350 mV
50 uS
350 mV
50 uS
di/dt=2.5 A/uS; Vin=12 V; and
with 10 uF/10 V tantalum
capacitor & 1uF/10 V ceramic
capacitor at the output.
Tested with 0-20 MHz, with
10 uF/10 V tantalum
capacitor & 1 uF/10 V
ceramic capacitor at the
output
Notes
Vin=12 V, full load
Io=Io, min to Io, max
Vin=Vin, min to Vin, max
Tref=Ta, min to Ta, max
Notes:
All specifications are typical at nominal input (Vin=12 V), full load at 25
°C
unless otherwise stated.
1. Over all operating input voltages, resistive loads and temperature conditions.
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
•
Tel 201-432-0463
•
Fax 201-432-9542
•
www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc -14 Vdc Input
0.75 Vdc - 5.0 Vdc/6 A Output
Min
Vo=5.0 V
Vo=3.3 V
Vo=1.8 V
Vo=0.75 V
Switching Frequency
Output Voltage Trim Range (wide trim)
MTBF
Dimensions
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
Dimensions
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
Weight
-
1.0 x 0.5 x 0.243
25.4 x 12.7 x 6.16
5g
-
Vertical Mount
0.8 x 0.45 x 0.251
20.32 x 11.42 x 6.38
Surface Mount
88%
85%
80%
68%
220 kHz
0.7525 V
Typ
92%
88%
84%
73%
250 kHz
-
3,079,469 hours
Max
-
-
-
280 kHz
5V
Calculated Per Bell Core SR-332
(Vin=12 V; Vo=3.3 V, I
O
=4.8 V; T
a
=
25
°C)
Notes
Measured at Vin=12 V, full load
General Specifications
Parameter
Efficiency
Note:
All specifications are typical at 25
°C
unless otherwise stated.
Control Specifications
Parameter
Remote On/Off
Signal Low (Unit Off)
Signal High (Unit On)
Signal Low (Unit On)
Signal High (Unit Off)
Voltage Sequencing
Sequencing Voltage
Sequencing Slew Rate Capability
Sequencing Delay Time
Tracking Accuracy
Power-Up
Power-Down
-
-
100 mV
200 mV
200 mV
400 mV
Min
-0.3 V
2.5 V
-0.3 V
2.5 V
0.05 V
-
10 mS
Typ
-
-
-
-
-
-
-
Max
0.4 V
14 V
0.4 V
14 V
Vin
2 V/mS
-
Delay from Vin, min to application of voltage
on SEQ pin
Notes
xRBA-06E2A0; Remote On/Off pin open, Unit
on.
xRBA-06E2AL; Remote On/Off pin open, Unit
on.
Sequencing Voltage should be higher than
output voltage.
Output Trim Equations
Equation for calculating the trim resistor (in kΩ) given the desired adjusted voltage (Vadj) is shown below. The
Trim Up resistor should be connected between the Trim pin and Ground.
Vout
R
trim
10.507
=
−
1
V
adj
−
0.7525
Module
Trim
GND
Rtrim
Equation for calculating the trim voltage (in V) given the desired adjusted voltage (Vadj) is shown below. The
Trim Up voltage should be connected between the Trim pin and Ground.
Vout
V
trim
=
0.7
−
0.0667
×
(
V
adj
−
0.7525)
Module
Trim
Vtrim
GND
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
•
Tel 201-432-0463
•
Fax 201-432-9542
•
www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc -14 Vdc Input
0.75 Vdc - 5.0 Vdc/6 A Output
Efficiency Data
MODULE 5.0V
MODULE 3.3V
100.0%
EFFICIENCY
7.0V
12.0V
14.0V
100.0%
80.0%
60.0%
40.0%
20.0%
0.0%
1A
2A
3A
4A
5A
OUTPUT CURRENT
EFFICIENCY
80.0%
60.0%
40.0%
20.0%
0.0%
1A
2A
3A
4A
5A
OUTPUT CURRENT
4.5V
12.0V
14.0V
MODULE 1.8V
100.0%
EFFICIENCY
90.0%
80.0%
70.0%
60.0%
0.6A
1.5A
3.0A 4.5A
6.0A
OUTPUT CURRENT
4.5V
12.0V
14.0V
MODULE 0.75V
90.0%
80.0%
70.0%
60.0%
50.0%
0.6A
1.5A
3.0A
4.5A
6.0A
OUTPUT CURRENT
4.5V
12.0V
14.0V
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
•
Tel 201-432-0463
•
Fax 201-432-9542
•
www.belfuse.com
EFFICIENCY
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc -14 Vdc Input
0.75 Vdc - 5.0 Vdc/6 A Output
Thermal Derating Curves
SRBA-06E2Ax, Vo=0.75 V
VRBA-06E2Ax, Vo=0.75 V
SRBA-06E2Ax, Vo=2.5 V
VRBA-06E2Ax, Vo=2.5 V
SRBA-06E2Ax, Vo=5.0 V
VRBA-06E2Ax, Vo=5.0 V
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
•
Tel 201-432-0463
•
Fax 201-432-9542
•
www.belfuse.com
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