NON-ISOLATED DC/DC CONVERTERS
2.5 Vdc Input
0.9 Vdc - 1.65 Vdc/10 A Output
xRAH-10J Series
•
•
•
•
•
Non-Isolated
RoHS Compliant
Rev.A
•
Remote On/Off
•
Short Circuit Protection
•
Over Current Protection
•
Trim Function
Low Profile Package (7.82 mm)
Fixed Frequency (300 kHz)
Under-Voltage Lockout (UVLO)
UL60950-1 Recognized (UL/cUL)
Description
The Bel xRAH-10Jxx0 is part of the low cost non-isolated dc/dc power converter series. The modules use a SMD
or SIP package for ease of layout and space savings. The output is closely regulated and the efficiency of 1.5
Vdc output is typically 88% at full load. Typical features include remote on/off, input under voltage lockout, over
current protection and short circuit protection.
Part Selection
Output
Voltage
1.5 V
1.2 V
1.0 V
Input
Voltage
2.5 V
2.5 V
2.5 V
Max. Output
Current
10 A
10 A
10 A
Max. Output
Power
15 W
12 W
10 W
Typical
Efficiency
88%
83%
80%
Part Number
Surface Mount
SRAH-10J150
SRAH-10J120
SRAH-10J100
Part Number
Vertical Mount
VRAH-10J150
VRAH-10J120
VRAH-10J100
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
6V
7V
85
°C
125
°C
Notes
Input Specifications
Parameter
Input Voltage
Input Current (no load)
Input Current (full load)
Vo=1.5 V
Vo=1.2 V
Vo=1.0 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
Turn off Voltage Threshold
2
Min
2.25 V
-
-
-
-
-
-
-
-
2V
1.8 V
Typ
2.5 V
75 mA
6.8 A
5.6 A
4.9 A
4 mA
80 mA
25 mA
0.04 A s
2.1 V
2V
2
Max
2.75 V
-
-
-
-
8 mA
150 mA
50 mA
0.10 A s
2.15 V
2.15 V
2
Notes
Tested with simulated source
impedance of 500 nH, 5 Hz to 20 MHz;
with a 270 uF/16 V with ESR=0.018
ohm max, at 100 kHz at 25
°C
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
2.5 Vdc Input
0.9 Vdc - 1.65 Vdc/10 A Output
Output Specifications
Parameter
Output Voltage Set Point
Vo=1.5 V
Vo=1.2 V
Vo=1.0 V
Line Regulation
Vo=1.5 V
Vo=1.2 V
Vo=1.0 V
Load Regulation
Vo=1.5 V
Vo=1.2 V
Vo=1.0 V
Regulation Over Temperature
(-40
°C
to +85
°C)
Vo=1.5 V
Vo=1.2 V
Vo=1.0 V
Output Current
Current Limit Threshold
Short Circuit Surge Transient
Vo=1.5 V
Vo=1.2 V
Vo=1.0 V
Ripple and Noise (rms)
Ripple and Noise (pk-pk)
Turn on Time
Overshoot at Turn on
Output Capacitance
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
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
V
O
=1.0 V
V
O
=1.2 V
V
O
=1.5 V
-
-
-
-
-
-
-
-
-
-
-
-
90 mV
30 uS
90 mV
30 uS
80 mV
30 uS
80 mV
30 uS
80 mV
30 uS
80 mV
30 uS
125 mV
60 uS
125 mV
60 uS
120 mV
60 uS
120 mV
60 uS
120 mV
60 uS
120 mV
60 uS
Test conditions:
di/dt = 0.5 A/uS; Vin =
2.5 V; with a 220 uF
tantalum capacitor at the
output.
-
-
-
-
-
-
-
220 uF
-
-
-
5 mV
5 mV
5 mV
10 mV
10 mV
10 mV
-
-
-
2 mV
2 mV
2 mV
5 mV
5 mV
5 mV
Min
1.470 V
1.176 V
0.980 V
Typ
1.5 V
1.2 V
1.0 V
Max
1.530 V
1.224 V
1.020 V
Notes
Test conditions:
Vin=2.5 V, Io=full load
-
-
-
0A
13 A
13 mV
10 mV
9 mV
-
-
0.5 A s
2
0.5 A s
2
0.5 A s
15 mV
50 mV
1 mS
0%
-
2
25 mV
20 mV
20 mV
10 A
25 A
1.5 A s
2
1.5 A s
2
1.5 A s
25 mV
100 mV
2 mS
3%
4000 uF
Test conditions:
0-20 MHz BW, with a 1 uF
ceramic capacitor at the
output.
2
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 CONVERTERS
2.5 Vdc Input
0.9 Vdc - 1.65 Vdc/10 A Output
General Specifications
Parameter
Efficiency
V
O
=1.5 V
V
O
=1.2 V
V
O
=1.0 V
Switching Frequency
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
85%
83%
79%
250 kHz
90%Vo
88%
86%
82%
300 kHz
-
4,447,157 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
4.7 g
-
-
-
350 kHz
110%Vo
Min
Typ
Max
Notes
Measured at Vin=2.5 V, full load and
Ta=25
°C.
Calculated Per Bell Core SR-332 (I
O
=
Nominal; T
a
= 25
°C)
-
-
Note:
All specifications are typical at nominal input, full load at 25
°C
unless otherwise stated.
Control Specifications
Parameter
Min
0V
2V
Typ
-
-
Max
0.5 V
5.5 V
Notes
Remote On/Off
Signal Low (Unit Off)
Signal High (Unit On)
Remote on/off pin open, the module is 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 (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.
R
TrimDown
A
=
−
B
V
nom
−
V
adj
A
49.788
31.241
11.029
B
287.900
223.900
92.800
R
TrimUp
=
V
adj
C
−
D
−
V
nom
D
226.000
162.000
56.200
Vnom
1.5 V
1.2 V
1.0 V
C
43.330
43.330
25.550
Vout
Module
Trim
GND
Rtrimdown
Module
Vout
Trim
GND
Rtrimup
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
2.5 Vdc Input
0.9 Vdc - 1.65 Vdc/10 A Output
Efficiency Data
Efficiency Curve
94.0%
92.0%
90.0%
88.0%
86.0%
84.0%
82.0%
80.0%
78.0%
76.0%
74.0%
1
2
3
4
5
6
7
8
9
10
Output Current (A)
Efficiency Curve
92.0%
90.0%
88.0%
86.0%
84.0%
82.0%
80.0%
78.0%
76.0%
74.0%
72.0%
1
2
3
4
5
6
7
8
9
10
Output Current (A)
Efficiency
Efficiency
2.25 V
2.50 V
2.75 V
2.25 V
2.50 V
2.75 V
xRAH-10J150
xRAH-10J120
Efficiency Curve
90.0%
88.0%
86.0%
84.0%
82.0%
80.0%
78.0%
76.0%
74.0%
72.0%
70.0%
1
2
3
4
5
6
7
8
9
10
Output Current (A)
Efficiency
2.25 V
2.50 V
2.75 V
xRAH-10J100
Thermal Derating Curve
Note:
Derating curve is for 1.2 V output and tested at nominal input voltage.
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
2.5 Vdc Input
0.9 Vdc - 1.65 Vdc/10 A Output
Ripple and Noise Waveforms
Ripple and Noise at max Load 1.0 Vdc Output
Ripple and Noise at max Load 1.2 Vdc Output
Ripple and Noise at max Load 1.5 Vdc Output
Note:
Ripple and noise with a 1uF ceremic capacitor at the output, Ta=25 deg C.
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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