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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 VO=1.0 V VO=1.2 V VO=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 VO=1.5 V VO=1.2 V VO=1.0 V Switching Frequency Output Trim Range MTBF Dimensions (surface mount) Inches (L x W x H) Millimeters (L x W x H) Dimensions (vertical) Inches (L x W x H) Millimeters (L x W x 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 (IO = Nominal; Ta = 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 k) 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.
RTrimDown =
Vnom 1.5 V 1.2 V 1.0 V
A -B Vnom - Vadj
A 49.788 31.241 11.029 B 287.900 223.900 92.800
RTrimUp =
Vadj
C -D - Vnom
D 226.000 162.000 56.200
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
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.
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 Outputt
Mechanical Outline
SRAH-10Jxx0
Pin Connections
bel
Pin 1 2 3 4 5 6 7
Function Remote On/Off Vin Ground Vout Trim N/A N/A
VRAH-10Jxx0
Pin Connections
bel
Pin 1 2 3 4 5
Function Remote On/Off Vin Ground Vout Trim
bel
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.
(c)2007 Bel Fuse Inc. Specifications subject to change without notice. 010507
CORPORATE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
FAR EAST 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
EUROPE 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

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