Comp
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
• Non-Isolated • Remote On/Off
• Low Profile Package (7.82 mm) • Short Circuit Protection
• Fixed Frequency (300 kHz) • Over Current Protection
• Under-Voltage Lockout (UVLO)
• UL60950-1 Recognized (UL/cUL)
• Trim Function
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 Input
Voltage Max. Output
Current Max. Output
Power Typical
Efficiency Part Number
Surface Mount Part Number
Vertical Mount
1.5 V 2.5 V 10 A 15 W 88% SRAH-10J150 VRAH-10J150
1.2 V 2.5 V 10 A 12 W 83% SRAH-10J120 VRAH-10J120
1.0 V 2.5 V 10 A 10 W 80% SRAH-10J100 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 Min Typ Max Notes
Input Voltage (continuous) -0.3 V - 6 V
Output Enable Terminal Voltage -0.3 V - 7 V
Ambient Temperature -40 °C - 85 °C
Storage Temperature -40 °C - 125 °C
Input Specifications
Parameter Min Typ Max Notes
Input Voltage 2.25 V 2.5 V 2.75 V
Input Current (no load) - 75 mA -
Input Current (full load)
Vo=1.5 V
Vo=1.2 V
Vo=1.0 V
-
-
-
6.8 A
5.6 A
4.9 A
-
-
-
Remote Off Input Current - 4 mA 8 mA
Input Reflected Ripple Current
(pk-pk) - 80 mA 150 mA
Input Reflected Ripple Current
(rms) - 25 mA 50 mA
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
I2t Inrush Current Transient - 0.04 A2s 0.10 A2s
Turn on Voltage Threshold 2 V 2.1 V 2.15 V
Turn off Voltage Threshold 1.8 V 2 V 2.15 V
xRAH-10J Series RoHS Com
p
liant Rev.A
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 Min Typ Max Notes
Output Voltage Set Point
Vo=1.5 V
Vo=1.2 V
Vo=1.0 V
1.470 V
1.176 V
0.980 V
1.5 V
1.2 V
1.0 V
1.530 V
1.224 V
1.020 V
Test conditions:
Vin=2.5 V, Io=full load
Line Regulation
Vo=1.5 V
Vo=1.2 V
Vo=1.0 V
-
-
-
2 mV
2 mV
2 mV
5 mV
5 mV
5 mV
Load Regulation
Vo=1.5 V
Vo=1.2 V
Vo=1.0 V
-
-
-
5 mV
5 mV
5 mV
10 mV
10 mV
10 mV
Regulation Over Temperature
(-40 °C to +85 °C)
Vo=1.5 V
Vo=1.2 V
Vo=1.0 V
-
-
-
13 mV
10 mV
9 mV
25 mV
20 mV
20 mV
Output Current 0 A - 10 A
Current Limit Threshold 13 A - 25 A
Short Circuit Surge Transient
Vo=1.5 V
Vo=1.2 V
Vo=1.0 V
-
-
-
0.5 A2s
0.5 A2s
0.5 A2s
1.5 A2s
1.5 A2s
1.5 A2s
Ripple and Noise (rms) - 15 mV 25 mV
Ripple and Noise (pk-pk) - 50 mV 100 mV
Test conditions:
0-20 MHz BW, with a 1 uF
ceramic capacitor at the
output.
Turn on Time - 1 mS 2 mS
Overshoot at Turn on - 0% 3%
Output Capacitance 220 uF - 4000 uF
Transient Response
Overshoot - 90 mV 125 mV
50% ~ 100%
Max Load Settling Time - 30 uS 60 uS
Overshoot - 90 mV 125 mV
100% ~ 50%
Max Load Settling Time
VO=1.5 V
- 30 uS 60 uS
Overshoot - 80 mV 120 mV
50% ~ 100%
Max Load Settling Time - 30 uS 60 uS
Overshoot - 80 mV 120 mV
100% ~ 50%
Max Load Settling Time
VO=1.2 V
- 30 uS 60 uS
Overshoot - 80 mV 120 mV
50% ~ 100%
Max Load Settling Time - 30 uS 60 uS
Overshoot - 80 mV 120 mV
100% ~ 50%
Max Load Settling Time
VO=1.0 V
- 30 uS 60 uS
Test conditions:
di/dt = 0.5 A/uS; Vin =
2.5 V; with a 220 uF
tantalum capacitor at the
output.
Note: All specifications are typical at nominal input, full load at 25 °C unless otherwise stated.
Nominal: Ta = 25 DC)
Millimelers (L x w x H)
19.81x17.78 x 3.13
Millimelers (L x w x H)
17.78 x 7.82 x1651
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 Min Typ Max Notes
Efficiency
VO=1.5 V
VO=1.2 V
VO=1.0 V
85%
83%
79%
88%
86%
82%
-
-
-
Measured at Vin=2.5 V, full load and
Ta=25 °C.
Switching Frequency 250 kHz 300 kHz 350 kHz
Output Trim Range 90%Vo - 110%Vo
MTBF 4,447,157 hours Calculated Per Bell Core SR-332 (IO =
Nominal; Ta = 25 °C
)
Dimensions (surface mount)
Inches (L × W × H)
Millimeters
(
L × W × H
)
0.78 x 0.70 x 0.32
19.81 x 17.78 x 8.13
Dimensions (vertical)
Inches (L × W × H)
Millimeters
(
L × W × H
)
0.70 x 0.308 x 0.65
17.78 x 7.82 x 16.51
Weight - 4.7 g -
Note: All specifications are typical at nominal input, full load at 25 °C unless otherwise stated.
Control Specifications
Parameter Min Typ Max Notes
Remote On/Off
Signal Low (Unit Off) 0 V - 0.5 V
Signal High (Unit On) 2 V - 5.5 V 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.
B
VV
A
R
adjnom
TrimDown −
−
= D
VV
C
R
nomadj
TrimUp −
−
=
Vnom A B C D
1.5 V 49.788 287.900 43.330 226.000
1.2 V 31.241 223.900 43.330 162.000
1.0 V 11.029 92.800 25.550 56.200
Module
Vout
Trim
GND
Rtrimdown
Module
Vout
Trim
GND Rtrimup
+H
Bel Fuu Inc. 206 van vorst Strss‘. Jersey Cily, NJ 07302 - m 2n1-432-0463 - Fax 2n1-432-9542 - www.mlfussmm
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
74.0%
76.0%
78.0%
80.0%
82.0%
84.0%
86.0%
88.0%
90.0%
92.0%
94.0%
12345678910
Output Current (A)
Efficienc
y
2.25 V
2.50 V
2.75 V
Efficiency Curve
72.0%
74.0%
76.0%
78.0%
80.0%
82.0%
84.0%
86.0%
88.0%
90.0%
92.0%
12345678910
Output Current (A)
Efficienc
y
2.25 V
2.50 V
2.75 V
xRAH-10J150 xRAH-10J120
Efficiency Curve
70.0%
72.0%
74.0%
76.0%
78.0%
80.0%
82.0%
84.0%
86.0%
88.0%
90.0%
12345678910
Output Current (A)
Efficienc
y
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.
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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.
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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
Transient Response Waveforms
Transients 100% to 50% load 1.0 Vdc output Transients 50% to 100% load 1.0 Vdc output
Transients 100% to 50% load 1.2 Vdc output Transients 50% to 100% load 1.2 Vdc output
Transients 100% to 50% load 1.5 Vdc output Transients 50% to 100% load 1.5 Vdc output
Note: Transient response at 2.5 V input, di/dt=0.5 A/uS, with 220 uF tantalum cap at the output, Ta=25 deg C.
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RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and
other hazardous substances from electronic products. These parts are not however
compatible with the higher temperatures associated with lead free solder processes and
must be soldered using a reflow profile with a peak temperature of no more than 240 ”C.
mm so Fuse Inc Sflmtlcatlans sooec: to Many
CORPORATE FAR EAST EUROPE
Eel Fuse Inc. Eel Fuse le. Eel Fuse Europe Ltd.
206 Van Vorst Street 3F/ 5 Luk Hop Street Preston Technology Man
Jersey city, NJ 07302 San Po Kong Marsh Lane. Suite G7. Pr
Tel 201-432-0463 Kowloon, Hong Kong Lancashlre. PR1 EUD, U.
Fax 201-432-9542 Tel 552-2323-5515 Tel 44-1772-556601
wwwoelrusemm Fax 852-2352-3706 Fax 44-1772-888366
www bellose com www heliuse oom
©
2007 Bel Fuse Inc. Specifications subject to change without notice. 010507
CORPORATE FAR EAST EUROPE
Bel Fuse Inc. Bel Fuse Ltd. Bel Fuse Europe Ltd.
206 Van Vorst Street 8F/ 8 Luk Hop Street Preston Technology Management Centre
Jersey City, NJ 07302 San Po Kong Marsh Lane, Suite G7, Preston
Tel 201-432-0463 Kowloon, Hong Kong Lancashire, PR1 8UD, U.K.
Fax 201-432-9542 Tel 852-2328-5515 Tel 44-1772-556601
www.belfuse.com Fax 852-2352-3706 Fax 44-1772-888366
www.belfuse.com www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
2.5 Vdc Input 0.9 Vdc - 1.65 Vdc/10 A Outputt
Mechanical Outline
SRAH-10Jxx0
VRAH-10Jxx0
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and
other hazardous substances from electronic products. These parts are not however
compatible with the higher temperatures associated with lead free solder processes and
must be soldered using a reflow profile with a peak temperature of no more than 240 ºC.
bel
Pin Connections
Pin Function
1 Remote On/Off
2 Vin
3 Ground
4 Vout
5 Trim
6 N/A
7 N/A
Pin Connections
Pin Function
1 Remote On/Off
2 Vin
3 Ground
4 Vout
5 Trim
bel
bel
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