NON-ISOLATED DC/DC CONVERTERS
3.3 Vdc Input
0.9 Vdc - 2.5 Vdc/15 A Output
VRPB-15C Series
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Non-Isolated
High Efficiency
High Power Density
Fixed Frequency (300 kHz)
Low Cost
Remote On/Off
Industry Standard Footprint
RoHS Compliant
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Rev.A
Over Temperature Protection
Under-voltage Lockout (UVLO)
OCP/SCP
Industrial Temperature Range
Remote Sense
Active Low/High (Option)
Description
The Bel VRPB-15Cxxx is part of the low cost non-isolated dc/dc converter series. The modules use a SIP package
for ease of layout and space savings. The output is closely regulated and the efficiency is typically 93% at 2.5 Vdc
output at full load. Typical features include remote on/off, under-voltage lockout, over-current protection and short
circuit protection.
Part Selection
Output
Voltage
2.5 Vdc
1.8 Vdc
1.5 Vdc
1.2 Vdc
0.9 Vdc
Input
Voltage
3.3 Vdc
3.3 Vdc
3.3 Vdc
3.3 Vdc
3.3 Vdc
Max. Output
Current
15 A
15 A
15 A
15 A
15 A
Max. Output
Power
37.5 W
27.0 W
22.5 W
18.0 W
13.5 W
Typical
Efficiency
93%
90%
89%
86%
83%
Model Number
Active Low
VRPB-15C25L
VRPB-15C18L
VRPB-15C15L
VRPB-15C12L
VRPB-15C09L
Model Number
Active High
VRPB-15C25S
VRPB-15C18S
VRPB-15C15S
VRPB-15C12S
VRPB-15C09S
Notes:
1. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers.
2. Add “0” suffix at the end of the model number to indicate “Tube Packaging”, and “R” for “Reel
Packaging”, and “G” for “Tray Packaging”.
Absolute Maximum Ratings
Parameter
Input Voltage (continuous)
Output Enable Terminal Voltage
Ambient Temperature
Storage Temperature
Min
-0.3 V
-0.3 V
-40
°C
-55
°C
Typ
-
-
-
-
Max
4V
6V
85
°C
125
°C
Notes
Input Specifications
Parameter
Input Voltage
Input Current (full load)
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Vo=0.9 V
Input Current (no load)
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Vo=0.9 V
-
-
-
-
-
120 mA
140 mA
160 mA
170 mA
180 mA
200 mA
200 mA
200 mA
200 mA
200 mA
Min
3V
-
-
-
-
-
Typ
3.3 V
-
-
-
-
-
Max
3.6 V
15 A
11.5 A
9.5 A
8A
6A
Notes
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
3.3 Vdc Input
0.9 Vdc - 2.5 Vdc/15 A Output
Input Specifications (continued)
Parameter
Remote Off Input Current
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Vo=0.9 V
Input Reflected Ripple Current (pk-pk)
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Vo=0.9 V
Input Reflected Ripple Current (rms)
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Vo=0.9 V
2
I t Inrush Current Transient
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Vo=0.9 V
Turn-on Voltage Threshold
Turn-off Voltage Threshold
Min
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Typ
12 mA
12 mA
17 mA
15 mA
15 mA
80 mA
110 mA
130 mA
100 mA
85 mA
25 mA
30 mA
40 mA
30 mA
25 mA
0.02 A s
2
0.015 A s
2
0.01 A s
2
0.008 A s
2
0.008 A s
2.8 V
2.5 V
2
Max
20 mA
20 mA
20 mA
20 mA
20 mA
120 mA
160 mA
180 mA
150 mA
135 mA
40 mA
50 mA
60 mA
50 mA
40 mA
0.04 A s
2
0.03 A s
2
0.02 A s
2
0.016 A s
2
0.016 A s
-
-
2
Notes
Tested with simulated source
impedance of 500nH and two
270uF/16V (P/N: 16SP270M SANYO)
Oscon Capacitors at the input
Output Specifications
Parameter
Output Voltage Set Point
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
V
O
=0.9 V
Load Regulation
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
V
O
=0.9 V
Line Regulation
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
V
O
=0.9 V
Regulation Over Temperature
(-40°C to +85
°C)
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
V
O
=0.9 V
-
-
-
-
-
-
-
-
-
-
4 mV
3 mV
3 mV
2 mV
2 mV
30 mV
20 mV
15 mV
15 mV
10 mV
7.5 mV
5.5 mV
4.5 mV
4.0 mV
4.0 mV
50 mV
40 mV
30 mV
25 mV
20 mV
-
-
-
-
-
6 mV
5 mV
4 mV
3 mV
3 mV
12.5 mV
9.0 mV
7.5 mV
6.0 mV
6.0 mV
Min
2.450 V
1.764 V
1.470 V
1.176 V
0.882 V
Typ
2.5 V
1.8 V
1.5 V
1.2 V
0.9 V
Max
2.550 V
1.836 V
1.530 V
1.224 V
0.918 V
Notes
Test condition:
Vin=3.3 V, lout=full load
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
3.3 Vdc Input
0.9 Vdc - 2.5 Vdc/15 A Output
Output Specifications (continued)
Parameter
Output Current
Current Limit Threshold
Short Circuit Surge Transient
Turn on Time
Overshoot at Turn on
Output Capacitance
Output Ripple and Noise (pk-pk)
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
V
O
=0.9 V
Output Ripple and Noise (rms)
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
V
O
=0.9 V
Transient Response
50% ~ 100% Max Load
Settling Time
100% ~ 50% Max Load
Settling Time
50% ~ 100% Max Load
Settling Time
100% ~ 50% Max Load
Settling Time
50% ~ 100% Max Load
Settling Time
100% ~ 50% Max Load
Settling Time
50% ~ 100% Max Load
Settling Time
100% ~ 50% Max Load
Settling Time
50% ~ 100% Max Load
Settling Time
100% ~ 50% Max Load
Settling Time
V
O
=0.9 V
V
O
=1.2 V
V
O
=1.5 V
V
O
=1.8 V
V
O
=2.5 V
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
110 mV
40 uS
110 mV
40 uS
100 mV
40 uS
100 mV
40 uS
100 mV
40 uS
100 mV
40 uS
90 mV
40 uS
90 mV
40 uS
90 mV
40 uS
90 mV
40 uS
150 mV
80 uS
150 mV
80 uS
130 mV
80 uS
130 mV
80 uS
130 mV
80 uS
130 mV
80 uS
120 mV
80 uS
120 mV
80 uS
120 mV
80 uS
120 mV
80 uS
Test conditions:
di/dt = 0.5 A/uS; Vin = 3.3 V;
and with two 220 uF Tantalum
capacitor at the output
-
-
-
-
-
5 mV
7 mV
8 mV
6 mV
5 mV
10 mV
10 mV
12 mV
10 mV
10 mV
Min
0A
18 A
-
-
-
-
-
-
-
-
-
Typ
-
-
0.2 A
2
s
6 mS
0%
-
20 mV
25 mV
30 mV
25 mV
20 mV
Max
15 A
35 A
0.4 A
2
s
10 mS
3%
6800 uF
50 mV
50 mV
60 mV
50 mV
50 mV
Notes
Test conditions:
0-20 MHz BW; 0.1 uF ceramic
capacitor and 10 uF aluminum
capacitor at the output
Note:
All specifications are typical at 25
°C
unless otherwise stated.
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
3.3 Vdc Input
Parameter
Efficiency
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
V
O
=0.9 V
Switching Frequency
Output Voltage Trim Range
Vo=2.5 V
Vo=0.9 V-1.8 V
Remote Sense Compensation
V
O
=2.5 V
V
O
=0.9 V-1.8 V
MTBF
Dimensions
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
Weight
-
2.0 x 0.55 x 0.387
50.8 x 13.97 x 9.84
9.2 g
-
91%
88%
87%
84%
80%
250 kHz
90% V
O
90% V
O
-
-
93%
90%
89%
86%
83%
300 kHz
-
-
-
-
4,163,010 hours
-
-
-
-
-
340 kHz
105% V
O
110% V
O
5% V
O
10% V
O
Measured at Vin=3.3 V, full load.
0.9 Vdc - 2.5 Vdc/15 A Output
Min
Typ
Max
Notes
General Specifications
The total output adjust range will not be
higher than 105% Vo for 2.5 V module,
and 110% Vo for other modules.
Calculated Per Bell Core SR-332
(Vin=3.3 V, I
O
= 12 A; T
a
= 25
°C)
Note:
All specifications are typical at 25
°C
unless otherwise stated.
Control Specifications
Parameter
Min
-0.3 V
2.5 V
-0.3 V
2.5 V
Typ
-
-
-
-
Max
0.8 V
5.5 V
0.8 V
5.5 V
Notes
Remote On/Off
Signal Low (Unit Off)
Signal High (Unit On)
Signal Low (Unit On)
Signal High (Unit Off)
VRPB-15CxxS
VRPB-15CxxL
Output Trim Equations
Equations for calculating the trim resistor (in kΩ) given the desired adjusted voltage (Vadj) and the nominal
output voltage of the converter (Vnom) are shown below. The Trim Down resistor should be connected between
the Trim pin and Vout. The Trim Up resistor should be connected between the Trim pin and Ground. Only one of
the resistors should be used for any given application.
Vout
R
trim
_
down
=
A
(
V
adj
−
0.8)
V
nom
−
V
adj
Sense
−
B
Module
trim
GND
Rtrim_down
Vout
R
trim
_
up
Vnom
2.5 V
1.8 V
1.5 V
1.2 V
0.9 V
C
=
−
D
V
adj
−
V
nom
2.370
2.370
2.370
2.490
1.050
Sense
Module
trim
Rtrim_up
GND
A
4.990
4.990
4.990
2.370
0.010
B
1.896
1.896
1.896
1.992
0.840
C
4.990
4.990
4.990
2.370
0.010
D
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
3.3 Vdc Input
0.9 Vdc - 2.5 Vdc/15 A Output
Efficiency Data
Model 2.5V
Model 1.8V
97.0%
95.0%
Efficiency
Efficiency
95.0%
93.0%
91.0%
93.0%
91.0%
89.0%
87.0%
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0
Output Current
3.0V
3.3V
3.6V
89.0%
87.0%
85.0%
83.0%
81.0%
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0 10.0 11.0 12.0 13.0 14.0 15.0
Output Current
3.0V
3.3V
3.6V
Model 1.5V
Model 1.2V
92.0%
90.0%
88.0%
86.0%
84.0%
82.0%
80.0%
78.0%
76.0%
74.0%
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0
Output Current
3.0V
3.3V
3.6V
92.0%
90.0%
88.0%
86.0%
84.0%
82.0%
80.0%
78.0%
76.0%
74.0%
72.0%
70.0%
1.0
2.0
3.0
4.0
5.0
6.0
7.0
Efficiency
Efficiency
t
8.0
9.0 10.0 11.0 12.0 13.0 14.0 15.0
Output Current
3.0V
3.3V
3.6V
Model 0.9V
90.0%
88.0%
86.0%
84.0%
82.0%
80.0%
78.0%
76.0%
74.0%
72.0%
70.0%
68.0%
66.0%
64.0%
62.0%
60.0%
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0 10.0 11.0 12.0 13.0 14.0 15.0
Output Current
Efficiency
3.0V
3.3V
3.6V
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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