NON-ISOLATED DC/DC CONVERTER
4.5 Vdc - 32 Vdc Input
1.2 Vdc - 5.0 Vdc/1 A Output
xRAH-01Hxx0
•
Non-Isolated
•
Trim Function
RoHS Compliant
•
•
•
OCP/SCP
Rev.A
Remote On/Off
Under-Voltage Lockout (UVLO)
•
Low Profile Package (7.82 mm)
•
UL60950-1 Recognized (UL/cUL)
Description
The Bel xRAH-01Hxx0 series are part of the low cost non-isolated dc/dc converter series. These modules use a
SMD or vertical mount package for ease of layout and space savings. The output is closely regulated and the
efficiency of 5 Vdc output is typically 90% at full load. Typical features include remote on/off, input under voltage
lockout, over current protection and short circuit protection.
Part Selection
Output
Voltage
5.0 V
3.3 V
2.5 V
1.8 V
1.5 V
1.2 V
Input
Voltage
8.0 V - 32 V
4.5 V - 32 V
4.5 V - 32 V
4.5 V - 32 V
4.5 V - 32 V
4.5 V - 32 V
Max. Output
Current
1A
1A
1A
1A
1A
1A
Max. Output
Power
5.0 W
3.3 W
2.5 W
1.8 W
1.5 W
1.2 W
Typical
Efficiency
90%
86%
83%
79%
76%
73%
Part Number
Surface Mount
SRAH-01H500
SRAH-01H330
SRAH-01H250
SRAH-01H180
SRAH-01H150
SRAH-01H120
Part Number
Vertical Mount
VRAH-01H500
VRAH-01H330
VRAH-01H250
VRAH-01H180
VRAH-01H150
VRAH-01H120
Notes:
1. Add “0” suffix at the end of the model number to indicate “Tube Packaging”, and “R” for “Reel
Packaging”, and “G” for “Tray Packaging”.
2. 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
Ambient Temperature
Storage Temperature
Min
-0.3 V
-0.3 V
-40
°C
-40
°C
Typ
-
-
-
-
Max
34 V
12 V
85
°C
125
°C
Notes
Input Specifications
Parameter
Input Voltage
V
O
=5.0 V
V
O
=1.2 V-3.3 V
Input Current (no load)
Input Current (full load)
V
O
=5.0 V
V
O
=3.3 V
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
Remote Off Input Current
Min
8.0 V
4.5 V
-
-
-
-
-
-
-
-
Typ
20 V
20 V
5 mA
-
-
-
-
-
-
2 mA
Max
32 V
32 V
8 mA
0.30 A
0.20 A
0.16 A
0.12 A
0.11 A
0.09 A
5 mA
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 CONVERTER
4.5 Vdc - 32 Vdc Input
1.2 Vdc - 5.0 Vdc/1 A Output
Input Specifications (continued)
Parameter
Input Reflected Ripple Current
(pk-pk)
Input Reflected Ripple Current
(rms)
I t Inrush Current Transient
Turn on Voltage Threshold
V
O
=5.0 V
V
O
=1.2 V-3.3 V
Turn off Voltage Threshold
V
O
=5.0 V
V
O
=1.2 V-3.3 V
2
Min
-
-
-
-
-
-
-
Typ
300 mA
100 mA
0.02 A s
5.0 V
4.1 V
3.6 V
3.3 V
2
Max
420 mA
160 mA
0.1 A s
7.0 V
4.5 V
5.0 V
4.0 V
2
Notes
Tested with simulated source impedance of 500nH,
5 Hz to 20 MHz and one 100 uF/50 V electrolytic
capacitor and a 3.3 uF/50 V ceramic capacitor at
the input
Note:
All specifications are typical at 25
°C
unless otherwise stated.
Output Specifications
Parameter
Output Voltage Set Point
V
O
=5.0 V
V
O
=3.3 V
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
Line Regulation
V
O
=5.0 V
V
O
=3.3 V
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
Load Regulation
V
O
=5.0 V
V
O
=3.3 V
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
Regulation Over Temperature
(-40
°C
to +85
°C)
Output Current
Current Limit Threshold
Short Circuit Surge Transient
Ripple and Noise (rms)
Ripple and Noise (pk-pk)
Turn on Time
Overshoot at Turn on
Output Capacitance
-
-
-
-
-
-
-
0A
2A
-
-
-
-
-
0 uF
-
-
-
-
-
-
Min
4.90 V
3.234 V
2.450 V
1.764 V
1.470 V
1.176 V
Typ
5.0 V
3.3 V
2.5 V
1.8 V
1.5 V
1.2 V
±5
mV
±3
mV
±2
mV
±2
mV
±1
mV
±1
mV
±5
mV
±3
mV
±2
mV
±2
mV
±1
mV
±1
mV
±10
mV
-
-
0.02 A s
6 mV
60 mV
6 mS
2%
-
2
Max
5.10 V
3.366 V
2.550 V
1.836 V
1.530 V
1.224 V
±10
mV
±6
mV
±5
mV
±4
mV
±3
mV
±2
mV
±10
mV
±6
mV
±5
mV
±4
mV
±3
mV
±2
mV
±20
mV
1A
3A
0.1 A s
10 mV
100 mV
30 mS
5%
400 uF
2
Notes
Test conditions:
Vin=20 V, Io=50% full
load
Test condition: 0-20 MHz
BW
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
4.5 Vdc - 32 Vdc Input
1.2 Vdc - 5.0 Vdc/1 A Output
Output Specifications (continued)
Parameter
Transient Response
50% ~ 100%
Max Load
100% ~ 50%
Max Load
50% ~ 100%
Max Load
100% ~ 50%
Max Load
50% ~ 100%
Max Load
100% ~ 50%
Max Load
50% ~ 100%
Max Load
100% ~ 50%
Max Load
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
V
O
=1.2 V
- 1.8 V
V
O
=2.5 V
V
O
=3.3 V
V
O
=5.0 V
Min
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Typ
140 mV
100 uS
140 mV
100 uS
80 mV
150 uS
80 mV
150 uS
70 mV
120 uS
70 mV
120 uS
60 mV
100 uS
60 mV
100 uS
Max
170 mV
130 uS
170 mV
130 uS
120 mV
200 uS
120 mV
200 uS
110 mV
160 uS
110 mV
160 uS
100 mV
130 uS
100 mV
130 uS
Test conditions:
di/dt = 0.5 A/uS;
Vin = 20 V
Notes
Note:
All specifications are typical at 20 V input, full load at 25
°C
unless otherwise stated.
General Specifications
Parameter
Efficiency
V
O
=5.0 V
V
O
=3.3 V
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
Switching Frequency
V
O
=5.0 V
V
O
=3.3 V
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
Output Trim Range
MTBF
Dimensions (surface mount)
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
Dimensions (vertical)
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
Weight
-
130 kHz
270 kHz
190 kHz
150 kHz
130 kHz
100 kHz
90%Vo
150 kHz
290 kHz
220 kHz
170 kHz
150 kHz
120 kHz
-
8,040,762 hours
0.78 x 0.70 x 0.32
19.81 x 17.78 x 8.13
0.70 x 0.308 x 0.65
17.78 x 7.82 x 16.51
5.1 g
-
170 kHz
310 kHz
250 kHz
190 kHz
170 kHz
140 kHz
110%Vo
Calculated Per Bell Core SR-332 (I
O
=
0.8 A, Vo=1.8 V; Vin=20 V; T
a
= 25
°C)
87%
83%
80%
76%
73%
70%
90%
86%
83%
79%
76%
73%
-
-
-
-
-
-
Measured at Vin=20 V, full load
Min
Typ
Max
Notes
Note:
All specifications are typical at 20V 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
4.5 Vdc - 32 Vdc Input
1.2 Vdc - 5.0 Vdc/1 A Output
Control Specifications
Parameter
Remote On/Off
Signal Low (Unit On)
Signal High (Unit Off)
Min
-0.3 V
2.8 V
Typ
-
-
Max
1V
12 V
Notes
Remote on/off pin open, unit on.
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 (Vo) 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
TrimDown
A
=
−
B
V
o
−
V
adj
Rtrimdown
Module
Trim
GND
R
TrimUp
C
=
−
D
V
adj
−
V
o
Vout
Module
Trim
Rtrimup
GND
Vo
5.0
3.3
2.5
1.8
1.5
1.2
A
153.56
53.80
36.70
21.70
15.20
8.70
B
85.20
21.50
21.50
21.50
21.50
21.50
C
29.20
17.20
17.20
17.20
17.20
17.20
D
48.70
X
X
X
X
X
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
4.5 Vdc - 32 Vdc Input
1.2 Vdc - 5.0 Vdc/1 A Output
Efficiency Data
Efficiency Curve
100.0%
95.0%
90.0%
85.0%
80.0%
75.0%
70.0%
65.0%
60.0%
55.0%
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Output Current (A)
95.0%
90.0%
85.0%
80.0%
75.0%
70.0%
65.0%
60.0%
55.0%
50.0%
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Output Current (A)
Efficiency Curve
Efficiency
8V
20 V
32 V
Efficiency
4.5 V
20 V
32 V
xRAH-01H500
Efficiency Curve
95.0%
90.0%
85.0%
80.0%
75.0%
70.0%
65.0%
60.0%
55.0%
50.0%
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Output Current (A)
95.0%
90.0%
85.0%
80.0%
75.0%
70.0%
65.0%
60.0%
55.0%
50.0%
xRAH-01H330
Efficiency Curve
Efficiency
4.5 V
20 V
32 V
Efficiency
4.5 V
20 V
32 V
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Output Current (A)
xRAH-01H250
Efficiency Curve
95.0%
90.0%
85.0%
80.0%
75.0%
70.0%
65.0%
60.0%
55.0%
50.0%
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Output Current (A)
95.0%
90.0%
85.0%
80.0%
75.0%
70.0%
65.0%
60.0%
55.0%
50.0%
xRAH-01H180
Efficiency Curve
Efficiency
Efficiency
4.5 V
20 V
32 V
4.5 V
20 V
32 V
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Output Current (A)
xRAH-01H150
xRAH-01H120
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
•
Tel 201-432-0463
•
Fax 201-432-9542
•
www.belfuse.com
DIY/Open Source Hardware
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