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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 VO=5.0 V VO=1.2 V-3.3 V Input Current (no load) Input Current (full load) VO=5.0 V VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=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 VO=5.0 V VO=1.2 V-3.3 V Turn off Voltage Threshold VO=5.0 V VO=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 VO=5.0 V VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V Line Regulation VO=5.0 V VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V Load Regulation VO=5.0 V VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=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 VO=1.2 V - 1.8 V VO=2.5 V VO=3.3 V VO=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 VO=5.0 V VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V Switching Frequency VO=5.0 V VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V 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 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 (IO = 0.8 A, Vo=1.8 V; Vin=20 V; Ta = 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 k) 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
RTrimDown
A = -B Vo - Vadj
Rtrimdown Module Trim GND
RTrimUp
C = -D Vadj - Vo
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
NON-ISOLATED DC/DC CONVERTER
4.5 Vdc - 32 Vdc Input 1.2 Vdc - 5.0 Vdc/1 A Output
Thermal Derating Curve
Test Condition: Derating curve is 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 CONVERTER
4.5 Vdc - 32 Vdc Input 1.2 Vdc - 5.0 Vdc/1 A Output
Ripple and Noise Waveforms
20 Vdc input, 5.0 Vdc output
20 Vdc input, 3.3 Vdc output
20 Vdc input, 2.5 Vdc output
20 Vdc input, 1.8 Vdc output
20 Vdc input, 1.5 Vdc output
20 Vdc input, 1.2 Vdc output
Note: Ripple and noise at max load, 0-20MHz BW, 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 CONVERTER
4.5 Vdc - 32 Vdc Input 1.2 Vdc - 5.0 Vdc/1 A Output
Transient Response Waveforms
50% to 100% load, 5.0 Vdc output
100% to 50% load, 5.0 Vdc output
50% to 100% load, 3.3 Vdc output
100% to 50% load, 3.3 Vdc output
50% to 100% load, 2.5 Vdc output
100% to 50% load, 2.5 Vdc output
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
Transient Response Waveforms (continued)
50% to 100% load, 1.8 Vdc output
100% to 50% load, 1.8 Vdc output
50% to 100% load, 1.5 Vdc output
100% to 50% load, 1.5 Vdc output
50% to 100% load, 1.2 Vdc output
100% to 50% load, 1.2 Vdc output
Note: Transient Response at 20 Vdc input, di/dt=0.5 A/uS, 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 CONVERTER
4.5 Vdc - 32 Vdc Input 1.2 Vdc - 5.0 Vdc/1 A Output
Mechanical Outline
SRAH-01Hxx0
Pin Connections
bel
Pin 1 2 3 4 5 6 7
Function Remote On/Off (option) Vin Ground Vout Trim (option) N/A N/A
VRAH-01Hxx0
Pin Connections
bel
bel
Pin 1 2 3 4 5
Function Remote On/Off (option) Vin Ground Vout Trim (option)
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. 011007
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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