BEL XRAH

NON-ISOLATED DC/DC CONVERTERS
3.0 Vdc - 3.6 Vdc Input
5.0 Vdc/1.5 A Output
xRAH-02C50x
RoHS Compliant
•
Non-Isolated
•
High Efficiency
•
Fixed Frequency (550 kHz)
•
Low Profile Package
•
Trim Function (Option)
•
Allows Burst Mode Operation at
Low Load Currents for xRAH02C500, Burst Mode Operation
Disabled for Lower Output Ripple
at Light Loads for xRAH-02C50B
•
UL60950 Recognized (UL/cUL)
Description
The Bel xRAH-02C50x is a part of the low cost non-isolated dc/dc 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 is typically
87% at full load.
Part Selection
Output
Voltage
Input Voltage
Max. Output
Current
Max. Output
Power
Typical
Efficiency
Part Number
Surface Mount
Part Number
Vertical Mount
5.0 Vdc
3.0 Vdc - 3.6 Vdc
1.5 A
7.5 W
87%
SRAH-02C50x
VRAH-02C50x
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. Replace “x” with “0” to allow burst mode operation at low load currents, or with “B” to disable burst
mode operation at light loads.
Absolute Maximum Ratings
Parameter
Min
Typ
Max
Input Voltage (continuous)
2.8 V
-
4.0 V
Ambient Temperature
-40 °C
-
85 °C
Storage Temperature
-40 °C
-
125 °C
Notes
Input Specifications
Min
Typ
Max
Input Voltage
Parameter
3.0 V
-
3.6 V
Input Current
-
-
3.3 A
-
30 mA
60 mA
-
100 mA
150 mA
I t Inrush Current Transient
-
0.02 A s
0.05 A s
Turn-on Voltage Threshold
-
2.8 V
2.9 V
Input Reflected Ripple Current
(rms)
Input Reflected Ripple Current
(pk-pk)
2
2
Notes
With simulated source impedance
of 500 nH, 5 Hz to 20 MHz; Use
one 270 uF/16 V capacitor with
ESR = 0.018 ohm max. at 100 kHz
2
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
3.0 Vdc - 3.6 Vdc Input
5.0 Vdc/1.5 A Output
Output Specifications
Parameter
Min
Typ
Max
4.825 V
5.0 V
5.175 V
Load Regulation
-
25 mV
40 mV
Line Regulation
-
20 mV
30 mV
Regulation Over Temperature
(0 °C to 70 °C)
-
45 mV
80 mV
0A
-
1.5 A
Ripple and Noise (RMS)
-
15 mV
25 mV
Ripple and Noise (pk-pk)
-
50 mV
100 mV
Ripple and Noise (pk-pk) (No Load)
xRAH-02C500
xRAH-02C50B
-
50 mV
18 mV
-
Overshoot at Turn on
-
0%
5%
0 uF
-
600 uF
-
100 mV
150 mV
-
50 uS
100 uS
-
100 mV
150 mV
-
50 uS
100 uS
Output Voltage Set Point
Output Current
Output Capacitance
Notes
Vin=3.3V, Io= full load
0-20MHz BW, with1uF ceramic
capacitor at the output.
Transient Response
50% ~ 100% Max Load
Settling Time
VO=5 V
100% ~ 50% Max Load
Settling Time
di/dt = 0.5 A/uS; Vin = 3.3 V;
Ta = 25 °C without external
capacitor
Notes: All specifications are typical at nominal input, full load at 25 °C unless otherwise stated.
General Specifications
Parameter
Min
Typ
Max
84%
87%
-
Switching Frequency
500 kHz
550 kHz
650 kHz
Output Trim Range
95% VO
-
110% VO
Efficiency
MTBF
Weight
Calculated Per Bell Core SR-332
(Vin=3.3 V; Vo=5 V; IO = 1.2 A; Ta =
25 °C)
14,455,458 hours
Dimensions (surface mount)
Inches (L × W × H)
Millimeters (L × W × H)
Dimensions (vertical)
Inches (L × W × H)
Millimeters (L × W × H)
Notes
Vin=3.3V, full load
0.78 x 0.7 x 0.32
19.81 x 17.78 x 8.13
0.7 x 0.308 x 0.65
17.78 x 7.82 x 16.51
-
5.2 g
-
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
3.0 Vdc - 3.6 Vdc Input
5.0 Vdc/1.5 A Output
Output Trim Equations
Equations for calculating the trim resistor 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
44.144
Rtrim _ down = (
− 12.5) Kohm
Vo − Vo, adj
Rtrim-down
Module
Trim
GND
8.4
− 2) Kohm
Rtrim _ up = (
Vo, adj − Vo
Vout
Module
Trim
Note: Output voltage Vo=5.004 V when Rtrim is open.
Rtrim-up
GND
Efficiency Data
Efficiency Curve
89.0%
Efficiency
88.0%
3.0 V
3.3 V
3.6 V
87.0%
86.0%
85.0%
84.0%
83.0%
82.0%
0.150
0.375
0.750
1.125
1.500
Output Current (A)
xRAH-02C500
Efficiency Curve
90.0%
Efficiency
88.0%
3.0 V
3.3 V
3.6 V
86.0%
84.0%
82.0%
80.0%
78.0%
0.150
0.375
0.750
1.125
1.500
Output Current (A)
xRAH-02C50B
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
3.0 Vdc - 3.6 Vdc Input
5.0 Vdc/1.5 A Output
Thermal Derating Curve
xRAH-02C50x
Ripple and Noise Waveforms
Ripple and noise at full load, Vin=3.3 V, Vo=5 V
Ripple and noise at no load, Vin=3.3 V, Vo=5 V
Note: Ripple and noise tested with 1 uF ceramic 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
NON-ISOLATED DC/DC CONVERTERS
3.0 Vdc - 3.6 Vdc Input
5.0 Vdc/1.5 A Output
Transient Response Waveforms
50% to 100% load transient at Vin=3.3 V, Vo=5 V
100% to 50% load transient at Vin=3.3 V, Vo=5 V
Note: Transient response at di/dt=0.5 A/uS, no external load capacitor, 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
NON-ISOLATED DC/DC CONVERTERS
3.0 V - 3.6 V Input
5.0 V/1.5 A Output
Mechanical Outline
SRAH-02C50x
Pin Connections
bel
VRAH-02C50x
Pin
1
2
3
4
5
6
7
Function
N/A
Vin
Ground
Vout
Trim
N/A
N/A
Pin Connections
bel
bel
Pin
Function
1
N/A
2
Vin
3
Ground
4
Vout
5
Trim
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.
©2006 Bel Fuse Inc. Specifications subject to change without notice. 032806
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