NON-ISOLATED DC/DC CONVERTERS 12 V Input 0.9 V-3.3 V/7 A Output x7AH-07A1A0 Series • Non-Isolated • Remote On/Off • Fixed Frequency • Input Under Voltage Lockout • High Efficiency • OCP/SCP • High Power Density • Wide Range Trim • Low Cost Description The Bel x7AH-07A1A0 modules are a series of non-isolated, step down dc/dc converters that operate from a nominal 12 V source. These converters are available in a range of output voltages from 0.9 V to 3.3 V. It is packaged in a compact, overmolded package rated at 7 A. Optional lead forming provides a vertical mount product for minimal footprint or a surface mount option for a very low profile. The output is closely regulated and the efficiency is typically 88% for 3.3 V output at full load. Typical features include remote on/off, input under voltage lockout, over current protection and short circuit protection. Part Selection Output Voltage 0.9 V -3.3 V Input Voltage 12 V Max. Output Current 7A Max. Output Power 23.1 W Typical Efficiency 88% Part Number Surface Mount S7AH-07A1A0 Part Number Vertical Mount V7AH-07A1A0 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 15 V 14 V 85 °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 VO=0.9 V Remote Off Input Current Min 10 V - Typ - Max 14 V 100 mA - 3 mA 3.0 A 2.6 A 1.9 A 1.6 A 1.3 A 1.0 A 10 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 CONVERTERS 12 V Input 0.9 V-3.3 V/7 A Output Input Specifications (continued) Parameter Min Typ Max Input Reflected Ripple Current (pk-pk) - 180 mA - Input Reflected Ripple Current (rms) - 50 mA - - 2 2 I t Inrush Current Transient Turn on Voltage Threshold Turn off Voltage Threshold 0.01 A s 9.5 V 9.0 V Notes Tested with simulated source impedance of 500 nH, 5 Hz to 20 MHz and two 270 uF/16 V Oscon capacitors with ESR=0.018 ohm max. at 100 kHz 2 0.02 A s 9.5 V 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 VO=0.9 V 3.247 V 2.460 V 1.771 V 1.476 V 1.181 V 0.886 V - 3.3 V 2.5 V 1.8V 1.5 V 1.2 V 0.9 V ±3mV 3.353 V 2.540 V 1.829 V 1.524 V 1.219 V 0.914 V ±6mV VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V - ±5 mV ±5 mV ±5 mV ±3 mV ±3 mV ±3 mV ±10 mV ±10 mV ±10 mV ±6 mV ±6 mV ±6 mV - 30 mV 50 mV 0A 10 A - 2 0.02 A s 7A 20 A 2 0.04 A s VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V - 20 mV 20 mV 15 mV 15 mV 15 mV 10 mV 50 mV 50 mV 40 mV 40 mV 30 mV 30 mV VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V 330 uF 70 mV 70 mV 60 mV 60 mV 60 mV 50 mV 8 mS 0% - 100 mV 100 mV 100 mV 80 mV 80 mV 70 mV 20 mS 3% 2800 uF - 120 mV 50 uS 120 mV 50 uS 180 mV 80 uS 180 mV 80 uS Line Regulation Load Regulation 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 Transient Response Overshoot 50% ~ 100% Max Load Settling Time Overshoot 100% ~ 50% Max Load Settling Time All Notes Test conditions: Vin=12 V, Io=50% full load Test condition: 0-20 MHz BW, with a 330 uF/10 V Tantalum capacitor at the output. Test conditions: di/dt = 0.5 A/uS; Vin = 12 V; with a 330 uF/10 V Tantalum capacitor at the output. 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 12 V Input 0.9 V-3.3 V/7 A Output General Specifications Parameter Min Typ Max Notes 85% 83% 80% 78% 75% 71% 88% 86% 83% 81% 78% 74% - 250 kHz 300 kHz 350 kHz - - 403% Vo 90% Vo - - 110% Vo 110% Vo Efficiency VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V Switching Frequency Output Trim Range (wide trim) Output Trim Range (narrow trim) VO=1.2 V-3.3 V VO=0.9 V Dimensions (surface mount) Inches (L × W × H) Millimeters (L × W × H) Dimensions (vertical) Inches (L × W × H) Millimeters (L × W × H) Weight VO=0.9 V Calculated Per Bell Core TR-332 (Vin=12 V; Vo=3.3 V; IO = 5.6 A; Ta = 25°C) 8,202,646 hours MTBF Measured at Vin=12 V, full load and Ta=25 °C 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 - 5g - Control Specifications Parameter Min Typ Max Signal Low (Unit Off) -0.3 V - 1V Signal High (Unit On) 3.5 V - 14 V Notes Remote On/Off 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 (Vnom) are shown below. The Trim Up resistor should be connected between the Trim pin and Ground. Rtrimup 6.06 = − 1.05 Vadj − Vnom Vout Module Trim Rtrimup GND Note: Output voltage Vo=0.9 V when Rtrimup is not connected. 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 12 V Input 0.9 V-3.3 V/7 A Output Efficiency Data MODULE 3.3 V EFFICIENCY 100.0% 90.0% 10.0 V 12.0 V 14.0 V 80.0% 70.0% 60.0% 0.7 1.75 3.5 5.25 7 OUTPUT CURRENT (A) MODULE 1.8 V EFFICIENCY 90.0% 85.0% 10.0 V 12.0 V 14.0 V 80.0% 75.0% 70.0% 65.0% 0.7 1.75 3.5 5.25 7 OUTPUT CURRENT (A) MODULE 0.9 V EFFICIENCY 80.0% 75.0% 10.0 V 12.0 V 14.0 V 70.0% 65.0% 60.0% 0.70 1.75 3.50 5.25 7.00 OUTPUT CURRENT (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 CONVERTERS 12 V Input 0.9 V-3.3 V/7 A Output Thermal Derating Curves Vo=0.9 V-2.5 V Vo=3.3 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 CONVERTERS 12 V Input 0.9 V-3.3 V/7 A Output S7AH-07A1A0 bel Pin Connections V7AH-07A1A0 bel Pin Function 1 Remote On/Off (option) 2 Vin 3 Ground 4 Vout 5 Trim (option) 6 N/A 7 N/A bel Pin Connections Pin Function 1 Remote On/Off (option) 2 Vin 3 Ground 4 Vout 5 Trim (option) 2005 Bel Fuse Inc. Specifications subject to change without notice. 040605 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