SRAH-05BT50

NON-ISOLATED DC/DC CONVERTER 5 V Input Vref/2 / 5 A Output xRAH-05BT50 • • • • Non-Isolated Fixed frequency (300 kHz) Under-voltage lockout (UVLO) Current Sink Capability RoHS Compliant • • • Remote On/Off OCP/SCP Low Profile Package (7.82 mm) Description The Bel xRAH-05BT50 is part of the low cost non-isolated dc/dc converter series. The converter is designed specifically to provide bus termination voltage in application such as DDR (double data rate) memory where the bus termination voltage must closely track the I/O bus voltage. The converter accepts a reference input and programs its output voltage to 50% of the reference. The modules use a SMD or vertical mount package for ease of layout and space savings. Part Selection Output Voltage Vref/2 Input Voltage 5V Max. Output Current 5A Max. Output Power 6.25 W Typical Efficiency 82% Part Number Surface Mount SRAH-05BT50 Part Number Vertical Mount VRAH-05BT50 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) Output Enable Terminal Voltage Ambient Temperature Storage Temperature Min -0.3 V -0.3 V -40 °C -55 °C Typ Max 6V 6V 85 °C 125 °C Notes Input Specifications Parameter Input Voltage Input Current (Source) Input Current (Sink) Input Current (No load) Remote Off Input Current Input Reflected Ripple Current (rms) Input Reflected Ripple Current (pk-pk) 2 I t Inrush Current Transient Vref Voltage Turn-on Voltage Threshold Turn Off Voltage threshold Min 4.5 V 0V 4.19 V Typ 5.0 V 9 mA 30 mA 110 mA 0.02 A s 2.5 V 4.3 V 3.8 V 2 Max 5.5 V 2A -1.5 A 60 mA 15 mA 50 mA 140 mA 0.05 A s 4V 4.5 V 4.49 V 2 Notes Measured with simulated source impedance of 500 nH, 5 Hz to 20 MHz; & one 270 uF/16 V capacitor with ESR = 0.018 ohm max. at 100 kHz Notes: 1. All tests are measured at Vref = 2.5 V. 2. 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 5 V Input Vref/2 / 5 A Output Output Specifications Parameter Output Voltage Set Point Load Regulation Line Regulation Regulation Over Temperature (-40 °C to +85 °C) Output Current Output Current Threshold Short Circuit Surge Transient Ripple and Noise (rms) Ripple and Noise (pk-pk) Turn On Time Overshoot at Turn on Output Capacitance Min 0.99* (Vref/2) V 0A 6.5 A Typ Vref/2 3 mV 1 mV 15 mV 2 0.04 A s 12 mV 45 mV 12 mS 0% Max 1.01* (Vref/2) V 6 mV 3 mV 20 mV 5A 12.5 A 2 0.08 A s 20 mV 90 mV 20 mS 3% 2200 uF Tested at: 0-20 MHz BW; Notes Vin=5 V, Iout=full load. with 1 uF ceramic capacitor at the output Notes: 1. All specifications are typical at nominal input, full load at 25 °C unless otherwise stated. 2. The modules track the transient response of the reference input. See the figure in TR data on Page 3. 3. The turn-off undershoot of the module is below 100mV if a 220 uF aluminum cap is added at the output. 4. All tests are measured at Vref=2.5 V. General Specifications Parameter Efficiency (source) Efficiency (sink) Switching Frequency MTBF Dimensions (surface mount) Inches (L × W × H) Millimeters (L × W × H) Dimensions (vertical) Inches (L × W × H) Millimeters (L × W × H) Weight Min 79% 78% 250 kHz Typ 82% 81% 300 kHz 8,841,119 hours 0.78 x 0.7 x 0.32 19.812 x 17.78 x 8.128 0.7 x 0.308 x 0.65 17.78 x 7.82 x 16.51 4.7 g Max 340 kHz Calculated Per Bell Core SR-332 (IO = 4 A, Vin=5 V, Vref=2.5 V; Ta = 25 °C) Notes Measured at Vin=5V, lo=lo-max full load Measured at Vin=5V, lo=lo-max full load - - Note: All specifications are typical at nominal input, full load at 25 °C unless otherwise stated. All tests are measured at Vref=2.5 V. Control Specifications Parameter Min -0.3 V -0.3 V 3.15 V(Vin=4.5V) 3.85 V(Vin=5.5V) Typ Max 1.35V (Vin=4.5V) 1.65V (Vin=5.5V) 5.5 V 5.5 V Notes Remote On/Off Signal Low (Unit Off) Signal High (Unit On) Remote on/off pin open, unit on Note: All tests are measured at Vref=2.5 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 5 V Input Vref/2 / 5 A Output Transient Response Track the transient response of the reference input. No External Load Capacitance. Channel 1: Transient response tracking. Channel 2: Transient response of the reference input. Ta = 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 CONVERTER 5 V Input Vref/2 / 5 A Output Efficiency Data Efficiency Curve 87.0% 86.0% 85.0% Efficiency 84.0% 83.0% 82.0% 81.0% 80.0% 79.0% 1.0 2.0 3.0 Output Current (A) 4.0 5.0 4.5 V 5.0 V 5.5 V Efficiency is tested at Vref=2.5 V Thermal Derating Curves VRAH-05BT50 SRAH-05BT50 Test Condition: Derating curves are tested at nominal input voltage and Vref=2.5V. 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 5 V Input Vref/2 / 5 A Output Mechanical Outline SRAH-05BT50 Pin Connections Pin 1 Function Remote On/Off (option) Vin Ground Vout Vref (option) N/A N/A bel 2 3 4 5 6 7 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 5 V Input Vref/2 / 5 A Output Mechanical Outline (continued) VRAH-05BT50 bel bel Pin Connections Pin 1 2 3 4 5 Function Remote On/Off (option) Vin Ground Vout Vref (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 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