BEL VRPF

NON-ISOLATED DC/DC CONVERTER
12 V Input
1.2 V-5.0 V/15 A Output
VRPF-15A1AC
RoHS Compliant
•
Non-Isolated
•
Under-Voltage Lockout (UVLO)
•
Fixed Frequency (220 kHz)
•
OCP/SCP
•
Wide Output Voltage Trim
•
Remote On/Off
•
Current Sink Capability for
Termination Applications
•
Power Good Output Signal (open
collector)
•
UL60950 Recognized (UL/cUL)
Description
The Bel VRPF-15A1AC is part of the low cost non-isolated dc/dc converter. The module uses a SIP package for
ease of layout and space savings. The output is closely regulated and can be trimmed from 1.2 V to 5.0 V. The
efficiency is typically 92% at 5.0 V output at full load. Typical features include remote on/off, under-voltage
lockout, over-current protection and short circuit protection.
Part Selection
Output
Voltage
1.2 V - 5.0 V
Input
Voltage
12 V
Max. Output
Current
15 A
Max. Output
Power
75 W
Typical
Efficiency
92%
Model Number
VRPF-15A1AC
Note: Add “G” suffix at the end of the model number to indicate Tray Packaging.
Absolute Maximum Ratings
Parameter
Input Voltage (continuous)
Output Enable Terminal Voltage
Ambient Temperature
Storage Temperature
Min
-0.3 V
-0.3 V
0 °C
-40 °C
Typ
-
Max
15 V
15 V
80 °C
125 °C
Notes
Input Specifications
Parameter
Input Voltage
Input Current (Source)
Min
10.8 V
Typ
12 V
Max
13.2 V
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.25 V
Vo=1.2 V
-
6.9 A
4.84 A
3.65 A
2.87 A
2.50 A
2.12 A
2.02 A
-
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.25 V
Vo=1.2 V
-
-5.9 A
-3.8 A
-2.7 A
-1.9 A
-1.6 A
-1.3 A
-1.1 A
-
Notes
Input Current (Sink)
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 CONVERTER
12 V Input
1.2 V-5.0 V/15 A Output
Input Specifications (continued)
Parameter
Remote Off Input Current
Min
-
Typ
25 mA
Max
30 mA
Input Reflected Ripple Current (pk-pk)
-
-
330 mA
Input Reflected Ripple Current (rms)
-
-
120 mA
I t Inrush Current Transient
-
0.05 A s
0.1 A s
Turn-on Voltage Threshold
Turn-off Voltage Threshold
-
9.8 V
9.4 V
10.4 V
10.3 V
2
2
Notes
Tested with simulated source
impedance of 500 nH 5 Hz to 20
MHz, and 5 × 10 uF/16 V ceramic
capacitors at the input
2
Note: All specifications are typical at 25 °C unless otherwise stated.
Output Specifications
Parameter
Output Voltage Set Point
Min
Typ
Max
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.25 V
Vo=1.2 V
4.900 V
3.234 V
2.450 V
1.764 V
1.470 V
1.225 V
1.176 V
5.0 V
3.3 V
2.5 V
1.8 V
1.5 V
1.25 V
1.2 V
5.100 V
3.366 V
2.550 V
1.836 V
1.530 V
1.275 V
1.224 V
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.25 V
Vo=1.2 V
-
10 mV
8 mV
5 mV
4 mV
3 mV
3 mV
2.5 mV
25.0 mV
16.5 mV
12.5 mV
9.0 mV
7.5 mV
6.3 mV
6.0 mV
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.25 V
Vo=1.2 V
Regulation Over Temperature
(0 °C to +80 °C)
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.25 V
Vo=1.2 V
Output Ripple and Noise (pk-pk)
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.25 V
Vo=1.2 V
-
5.0 mV
3.3 mV
2.5 mV
1.8 mV
1.5 mV
1.25 mV
1.2 mV
10.0 mV
6.6 mV
5.0 mV
3.6 mV
3.0 mV
2.5 mV
2.4 mV
-
10 mV
9 mV
8 mV
7 mV
6 mV
5 mV
4 mV
20 mV
18 mV
15 mV
14 mV
13 mV
12 mV
12 mV
-
60 mV
50 mV
40 mV
35 mV
35 mV
30 mV
30 mV
75 mV
65 mV
60 mV
50 mV
50 mV
50 mV
50 mV
Notes
Test condition:
Vin=12 V, lout=half load
Load Regulation
Line Regulation
Tested at 0-20 MHz BW, with
5×10 uF/16 V ceramic capacitors at
the input, and 5×10 uF/10 V ceramic
capacitors and a 1000 uF electrolytic
capacitor at the output.
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 CONVERTER
12 V Input
1.2 V-5.0 V/15 A Output
Output Specifications (continued)
Parameter
Output Ripple and Noise (rms)
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.25 V
Vo=1.2 V
Output Current
Current Limit Threshold
Short Circuit Surge Transient
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.25 V
Vo=1.2 V
Turn on Time
Overshoot at Turn on
Output Capacitance
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.25 V
Vo=1.2 V
Min
Typ
Max
0A
18 mV
15 mV
12 mV
12 mV
10 mV
10 mV
10 mV
-
30 mV
25 mV
20 mV
20 mV
15 mV
15 mV
15 mV
15 A
19.5 A
-
37.5 A
-
0.1 A s
2
0.1 A s
2
0.1 A s
2
0.3 A s
2
0.4 A s
2
0.4 A s
2
0.4 A s
20 mS
0.3 A s
2
0.3 A s
2
0.3 A s
2
0.6 A s
2
0.8 A s
2
0.8 A s
2
0.8 A s
100 mS
-
0%
3%
1050 uF
1050 uF
1050 uF
1050 uF
1050 uF
1050 uF
1050 uF
-
5080 uF
6000 uF
7840 uF
8500 uF
9000 uF
9500 uF
9680 uF
2
Notes
Tested at 0-20 MHz BW, with
5×10 uF/16 V ceramic capacitors at
the input, and 5×10 uF/10 V ceramic
capacitors and a 1000 uF/16 V
electrolytic capacitor at the output.
2
Transient Response
50% ~ 75% Max Load
Settling Time
75% ~ 50% Max Load
VO=5.0 V
Settling Time
50% ~ 75% Max Load
Settling Time
75% ~ 50% Max Load
VO=3.3 V
Settling Time
50% ~ 75% Max Load
Settling Time
75% ~ 50% Max Load
VO=1.25 V 2.5 V
Settling Time
50% ~ 75% Max Load
Settling Time
75% ~ 50% Max Load
Settling Time
VO=1.2 V
-
100 mV
200 mV
-
100 uS
200 uS
-
100 mV
200 mV
-
100 uS
200 uS
-
80 mV
165 mV
-
100 uS
200 uS
-
80 mV
165 mV
-
100 uS
200 uS
-
60 mV
125 mV
-
100 uS
200 uS
-
60 mV
125 mV
-
100 uS
200 uS
-
60 mV
120 mV
-
100 uS
200 uS
-
60 mV
120 mV
-
100 uS
200 uS
Test conditions:
di/dt = 0.1 A/uS; Vin = 12 V; with
5×10 uF ceramic capacitors and
a 1000 uF/16 V electrolytic at the
output
Note: All specifications are typical at nominal input, full load 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 CONVERTER
12 V Input
1.2 V-5.0 V/15 A Output
General Specifications
Parameter
Min
Typ
Max
Efficiency (Current Source)
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.25 V
Vo=1.2 V
90%
87%
84%
80%
78%
76%
76%
92%
89%
87%
82%
80%
79%
79%
-
Notes
Measured at Vin=12 V, full load.
Efficiency (Current Sink)
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.25 V
Vo=1.2 V
Switching Frequency
88%
84%
81%
77%
73%
68%
68%
91%
87%
84%
80%
76%
71%
71%
-
200 kHz
220 kHz
240 kHz
1.2 V
-
5.0 V
Output Voltage Trim Range
MTBF
Vo=1.2 V when the Trim pin is open.
Calculated Per Bell Core SR-332 (IO =
12 A, Vin=12 V; Ta = 25 °C)
3,664,032 hours
Dimensions
Inches (L × W × H)
Millimeters (L × W × H)
1.2 x 1.0 x 0.457
30.48 x 25.4 x 11.6
Weight
-
14.2 g
-
Note: All specifications are typical at 25 °C unless otherwise stated.
Control Specifications
Parameter
Min
Typ
Max
Signal Low (Unit Off)
0V
-
1V
Signal High (Unit On)
2.4 V
-
13.2 V
Notes
Remote On/Off
Remote On/Off pin open, the module is
ON.
Power Good
Power Good Delay
1
-
-
10 mS
2
-
0.3 V
-
Current Sink
-
5 mA
-
Signal Low
Notes: All specifications are typical at 25 °C unless otherwise stated.
1. Power good delay time is the time from output voltage in full regulation to power good asserted.
2. The power good signal is an open collector output. When the output of the module reaches 90%
of the nominal set point, the power good pin is set high.
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 CONVERTER
12 V Input
1.2 V-5.0 V/15 A Output
Output Trim Equation
Equation for calculating the trim resistor (in kΩ) given the desired adjusted voltage (Vadj) is shown below. The
Rset resistor should be connected between the Trim pin and GND.
Vout
⎛ 0.992 0.992 ⎞
Vadj = ⎜
+
⎟ ⋅ 1.18K + 0.992
⎝ 5.62 K Rset ⎠
Module
Trim
Rset
GND
Where, Vadj is the required voltage setpoint, Rset is the resistance required between TRIM and GND.
Power Good Signal Level Set
Equation for calculating the power good threshold (in kΩ) given the desired adjusted voltage (Vadj) is shown
below. The PWRGD_SET resistor should be connected between the PWRGD_SET pin (Pin 9) and GND.
Output
Voltage
5V
3.3V
2.5V
1.8V
1.5V
1.25V
1.2V
PWRGD_THRESHOLD Set Resistor (1%tol)
Short (Zero Ohm)
1.78k
4.22k
11.8k
26.1k
169k
Open (no resistor)
1.24
⎛
⎞
− 18.86 ⋅ 10 −6 ⎟ + 1.24
PWRGD _ THRESHOLD = 6.19 K ⎜
⎝ 2.21K + Rset
⎠
Where, Rset is the resistance required between PWRGD_SET and 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 CONVERTER
12 V Input
1.2 V-5.0 V/15 A Output
Efficiency Data
Efficiency Curve
Efficiency
Efficiency
Efficiency Curve
94.0%
92.0%
90.0%
88.0%
86.0%
84.0%
82.0%
80.0%
78.0%
76.0%
74.0%
10.8 V
12.0 V
13.2 V
1.5
3.75
7.5
11.25
92.0%
90.0%
88.0%
86.0%
84.0%
82.0%
80.0%
78.0%
76.0%
74.0%
72.0%
15
10.8 V
12.0 V
13.2 V
1.5
3.75
Output Current (A)
7.5
Vo=5.0 V
Efficiency Curve
Efficiency
Efficiency
Efficiency Curve
10.8 V
12.0 V
13.2 V
3.75
7.5
11.25
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%
10.8 V
12.0 V
13.2 V
1.5
15
3.75
Vo=2.5 V
10.8 V
12.0 V
13.2 V
11.25
Efficiency
Efficiency
15
Efficiency Curve
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%
7.5
11.25
Vo=1.8 V
Efficiency Curve
3.75
7.5
Output Current (A)
Output Current (A)
1.5
15
Vo=3.3 V
90.0%
88.0%
86.0%
84.0%
82.0%
80.0%
78.0%
76.0%
74.0%
72.0%
70.0%
1.5
11.25
Output Current (A)
15
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%
58.0%
56.0%
54.0%
10.8 V
12.0 V
13.2 V
1.5
3.75
7.5
11.25
15
Output Current (A)
Output Current (A)
Vo=1.5 V
Vo=1.25 V
Efficiency
Efficiency Curve
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%
58.0%
56.0%
54.0%
10.8 V
12.0 V
13.2 V
1.5
3.75
7.5
11.25
15
Output Current (A)
Vo=1.2 V
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 CONVERTER
12 V Input
1.2 V-5.0 V/15 A Output
Thermal Derating Curves
Vo = 5.0 V
Vo = 3.3 V
Vo = 2.5 V
Vo = 1.8 V
Vo = 1.5 V
Vo = 1.25 V
Vo = 1.2 V
Test Condition: The module is mounted on 2 OZ two-layer FR4 board.
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 CONVERTER
12 V Input
1.2 V-5.0 V/15 A Output
Mechanical Outline
Pin Connections
Pin
1
2
3
4
5
6
7
8
9
10
11
Function
Vout
Vout
Vout
Trim
Output Enable
Power Good
Ground
Ground
PWRGD_SET
Vin
Vin
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and
other hazardous substances from electronic products.
©2005 Bel Fuse Inc. Specifications subject to change without notice. 122805
CORPORATE
FAR EAST
EUROPE
Bel Fuse Inc.
206 Van Vorst Street
Jersey City, NJ 07302
Tel 201-432-0463
Fax 201-432-9542
www.belfuse.com
Bel Fuse Ltd.
8F/ 8 Luk Hop Street
San Po Kong
Kowloon, Hong Kong
Tel 852-2328-5515
Fax 852-2352-3706
www.belfuse.com
Bel Fuse Europe Ltd.
Preston Technology Management Centre
Marsh Lane, Suite G7, Preston
Lancashire, PR1 8UD, U.K.
Tel 44-1772-556601
Fax 44-1772-888366
www.belfuse.com