NON-ISOLATED DC/DC CONVERTER 4.5 V-32 V Input 1.2 V-3.3 V/1 A Output xRAH-01H1A0 RoHS Compliant • Non-Isolated output • Remote On/Off • Trim function • OCP/SCP • Low profile package (7.82 mm) • Under-voltage lockout (UVLO) Description The Bel xRAH-01H1A0 is part of the low cost non-isolated dc/dc converter series. The modules use a SMD or vertical mount package for ease of layout and space savings. The output is widely trimmed from 1.2 V to 3.3 V. Typical features include remote on/off, input under voltage lockout, over current protection and short circuit protection. Part Selection Output Voltage 1.2 V - 3.3 V Input Voltage 4.5 V - 32 V Max. Output Current 1A Max. Output Power 3.3 W Typical Efficiency 86% Part Number Surface Mount SRAH-01H1A0 Part Number Vertical Mount VRAH-01H1A0 Note: Add “0” suffix at the end of the model number to indicate “Tube Packaging”, and “R” for “Reel Packaging”, and “G” for “Tray Packaging”. Absolute Maximum Ratings Parameter Input Voltage (continuous) Min -0.3 V Typ - Max 34 V Output Enable Terminal Voltage -0.3 V - 12 V Ambient Temperature -40 °C - 85 °C Storage Temperature -40 °C - 125 °C Notes Input Specifications Parameter Input Voltage Input Current (no load) Input Current (full load) VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V Remote Off Input Current Input Reflected Ripple Current (pk-pk) Input Reflected Ripple Current (RMS) 2 I t Inrush Current Transient Min 4.5 V Typ 20 V Max 32 V - 5 mA 8 mA - 2 mA 0.20 A 0.16 A 0.12 A 0.11 A 0.09 A 5 mA - 300 mA 420 mA - 100 mA 160 mA 2 Notes Tested with simulated source impedance of 500 nH, 5 Hz to 20 MHz and one 100 F/50 V electrolytic capacitor and a 3.3 uF/50 V ceramic capacitor at the input 2 - 0.02 A s 0.1 A s Turn on Voltage Threshold - 4.1 V 4.5 V Turn off Voltage Threshold - 3.3 V 4.0 V Note: All specifications are typical 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 V-32 V Input 1.2 V-3.3 V/1 A Output Output Specifications Parameter Output Voltage Set Point Min Typ Max VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V 3.234 V 2.450 V 1.764 V 1.470 V 1.176 V 3.3 V 2.5 V 1.8 V 1.5 V 1.2 V 3.366 V 2.550 V 1.836 V 1.530 V 1.224 V VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V - ±3 mV ±2 mV ±2 mV ±1 mV ±1 mV ±6 mV ±5 mV ±4 mV ±3 mV ±2 mV VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V - ±3 mV ±2 mV ±2 mV ±1 mV ±1 mV ±6 mV ±5 mV ±4 mV ±3 mV ±2 mV Line Regulation Load Regulation Regulation Over Temperature (-40 °C to +85 °C) Output Current - ±10 mV ±20 mV 0A - 1A Current Limit Threshold 2A - Short Circuit Surge Transient - 0.02 A s Ripple and Noise (rms) - 6 mV 10 mV Ripple and Noise (pk-pk) - 60 mV 100 mV Turn on Time - 6 mS 30 mS Overshoot at Turn on Output Capacitance Transient Response Overshoot 50% ~ 100% Max Load Settling Time Overshoot 100% ~ 50% Max Load Settling Time Overshoot 50% ~ 100% Max Load Settling Time Overshoot 100% ~ 50% Max Load Settling Time Overshoot 50% ~ 100% Max Load Settling Time Overshoot 100% ~ 50% Max Load Settling Time Overshoot 50% ~ 100% Max Load Settling Time Overshoot 100% ~ 50% Max Load Settling Time Overshoot 50% ~ 100% Max Load Settling Time Overshoot 100% ~ 50% Max Load Settling Time VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V Notes Test conditions: Vin=20 V, Io=50% full load 3A 2 2 0.1 A s - 2% 5% 0 uF - 400uF - 80 mV 150 uS 80 mV 150 uS 70 mV 120 uS 70 mV 120 uS 60 mV 100 uS 60 mV 100 uS 60 mV 100 uS 60 mV 100 uS 60 mV 100 uS 60 mV 100 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 100 mV 130 uS 100 mV 130 uS 100 mV 130 uS 100 mV 130 uS Test condition: 0-20 MHz BW Test conditions: di/dt = 0.5 A/uS; Vin = 20 V Note: All specifications are typical at 20 V 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 V-32 V Input 1.2 V-3.3 V/1 A Output General Specifications Parameter Min Typ Max Notes VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V 83% 80% 76% 73% 70% 86% 83% 79% 76% 73% - VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V 270 kHz 190 kHz 150 kHz 130 kHz 100 kHz 290 kHz 220 kHz 170 kHz 150 kHz 120 kHz 310 kHz 250 kHz 190 kHz 170 kHz 140 kHz 1.2 V - 3.3 V Efficiency Measured at Vin=20 V, full load. Switching Frequency Output Trim Range MTBF Calculated Per Bell Core SR-332 (IO =0.8 A, Vin=20 V; Ta = 25 °C) 8,040,762 hours Dimensions (surface mount) Inches (L × W × H) Millimeters (L × W × H) Dimensions (vertical) Inches (L × W × H) Millimeters (L × W × H) Weight Vo=1.2 V when trim pin open. 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 - Note: All specifications are typical at 20V input, full load at 25 °C unless otherwise stated. Control Specifications Parameter Remote On/Off Min Typ Max Signal Low (Unit On) -0.3 V - 1V Signal High (Unit Off) 2.8 V - 12 V Notes Remote on/off pin open, unit 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 (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 = 8. 7 − 21.5 Vo − Vadj Rtrimdown Module Trim GND RTrimUp = 17.2 Vadj − Vo Vout Module Trim Rtrimup Note: Output voltage Vo=1.205 V GND 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 V-32 V Input 1.2 V-3.3 V/1 A Output Efficiency Data Efficiency Curve 95.0% 90.0% 85.0% 80.0% 75.0% 70.0% 65.0% 60.0% 55.0% 50.0% 4.5 V 20 V 32 V Efficiency Efficiency 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 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) Output Current (A) Vo = 3.3 V Vo = 2.5 V Efficiency Curve 95.0% 90.0% 95.0% 90.0% 85.0% 80.0% 75.0% 70.0% 65.0% 60.0% 55.0% 50.0% 4.5 V 20 V 32 V Efficiency 85.0% 80.0% 75.0% 4.5 V 20 V 32 V 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 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Output Current (A) Output Current (A) Vo = 1.8 V Vo = 1.5 V Efficiency Curve Efficiency Efficiency Efficiency Curve 95.0% 90.0% 85.0% 80.0% 75.0% 70.0% 65.0% 60.0% 55.0% 50.0% 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) Vo = 1.2 V 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 V-32 V Input 1.2 V-3.3 V/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 V-32 V Input 1.2 V-3.3 V/1 A Output Mechanical Outline SRAH-01H1A0 Pin Connections bel Pin Function 1 Remote On/Off (option) 2 Vin 3 Ground 4 Vout 5 Trim (option) 6 N/A 7 N/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 CONVERTER 4.5 V-32 V Input 1.2 V-3.3 V/1 A Output Mechanical Outline (continued) VRAH-01H1A0 bel bel Pin Connections Pin Function 1 Remote On/Off (option) 2 Vin 3 Ground 4 Vout 5 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 ºC. ©2005 Bel Fuse Inc. Specifications subject to change without notice. 112305 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