NON-ISOLATED DC/DC CONVERTERS 3.0V-5.5V Input • 0.8V-3.3V/12A Output X7AH-12F1A0 PRELIMINARY Non-Isolated • OCP/SCP • High Efficiency • Input Under Voltage Lockout • Fixed Frequency • Remote On/Off • Excellent Thermal Performance • Remote Sense (SMD module) • Low Cost • Trim Function Description The Bel X7AH-12F1A0 is part of the low cost non-isolated dc to dc converter series. This converter is available in a range of output voltages from 0.9V to 3.3V. It is packaged in a compact, overmolded package rated at 12A. The output is closely regulated and the efficiency of 3.3V output module is typically 93% at full load. Typical features include remote on/off, input under voltage lockout, over current protection and short circuit protection. Part Selection Output Voltage 0.8V-3.3V Input Voltage 3.0V – 5.5V Max. Output Current 12A Max. Output Power 39.6W Typical Efficiency 93% Part Number Surface Mount S7AH-12F1A0 Part Number Vertical Mount V7AH-12F1A0 Absolute Maximum Ratings Parameter Input Voltage (continuous) Output Enable Terminal Voltage Ambient Temperature Storage Temperature Min -0.3V -0.3V -40°C -55°C Typ - Max 6V 7V 85°C 125°C Notes Input Specifications Parameter Input Voltage 1 Input Current (no load) Input Current (full load) Min 3V - Typ 120mA Max 5.5V 200mA Remote Off Input Current - 2mA 11A 10.5A 9.0A 8.1A 6.5A 5.2A 3.2A 5mA Input Reflected Ripple Current (pk-pk) - 100mA 150mA Input Reflected Ripple Current (RMS) - 35mA 60mA I2t Inrush Current Transient Turn on Voltage Threshold Turn off Voltage Threshold - 0.09A2s 2.1V 2V 0.2A2s 2.4V VO=3.3V VO=2.5V VO=1.8V VO=1.5V VO=1.2V VO=1.0V VO=0.9V - Notes With simulated source impedance of 500nH, 5Hz to 20MHz; use a 270uF/16V cap with ESR=0.0018 ohm max at 100KHz Note: 1. The input voltage range of 3.3V output module is 4.5V-5.5V and that of 2.5V module is 3.6V-5.5V. 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 CONVERTERS 3.0V-5.5V Input 0.8V-3.3V/12A Output Output Specifications Parameter Output Voltage Set Point Line Regulation Load Regulation Regulation Over Temperature (-40°C to +85°C) Output Current Current Limit Threshold Short Circuit Surge Transient Min -2%Vo,set 0A 20A - Typ 0.3A2s Max 2%Vo,set 10mV 15mV 15mV 12A 30A 0.6A2s Ripple and Noise (RMS) - 12mV 21mV Ripple and Noise (pk-pk) - 50mV 100mV 330uF 5mS 0% - 10mS 3% 4800uF - 110mV 40uS 150mV 80uS - 110mV 40uS 150mV 80uS Turn on Time Overshoot at Turn on Output Capacitance Transient Response Overshoot 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Overshoot Settling Time All Notes Vin=5V, Io= 50% load Test conditions: 0-20MHz BW; 1uF ceramic capacitor and 330uF tantalum capacitor at the output. Test conditions: di/dt=0.5A/us, Vin=5V, with 330uF external load capacitance. Notes: 1. All specifications are typical at 5V input, full load at 25°C unless otherwise stated. 2. The input voltage range of 3.3V output module is 4.5V-5.5V and that of 2.5V module is 3.6V-5.5V. General Specifications Parameter Min Typ Max VO=3.3V VO=2.5V VO=1.8V VO=1.5V VO=1.2V VO=1.0V VO=0.9V 90% 86% 84% 81% 79% 77% 75% 93% 89% 87% 84% 82% 80% 78% - VO=1.8V VO=1.5V VO=1.2V VO=1.0V VO=0.9V 85% 81% 79% 78% 76% 250KHz 90%VO - 88% 84% 82% 81% 79% 300KHz - Notes Efficiency Vin=5V, full load Efficiency Switching Frequency Output Trim Range Remote Sense Compensation MTBF Dimensions (surface mount) Inches (L × W × H) Millimeters (L × W × H) Dimensions (vertical) Inches (L × W × H) Millimeters (L × W × H) Weight 350KHz 110%VO 0.2V Vin=3.3V, full load SMD module Calculated Per Bell Core TR-332 (IO = 9.6A; Ta = 25°C) TBD 0.78 x 0.70 x 0.32 19.81 x 17.78 x 8.128 - 0.70 x 0.308 x 0.65 17.78 x 7.82 x 16.51 5.1g - 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 3.0V-5.5V Input 0.8V-3.3V/12A Output Control Specifications Parameter Remote On/Off Signal Low (Unit Off) Signal High (Unit On) Min Typ Max -0.3V 2.4V - 0.8V Vin,max 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 (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 = RTrimUp = 2.0 − 10.187 0.9 − Vadj Trim_do 7.0 − 0.187 Vadj − 0.9 Trim_up Thermal Derating Curves S7AH-12F330 V7AH-12F330 S7AH-12F250 V7AH-12F250 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 3.0V-5.5V Input 0.8V-3.3V/12A Output Thermal Derating Curves (continued) S7AH-12F180 V7AH-12F180 S7AH-12F150 V7AH-12F150 S7AH-12F120 V7AH-12F120 S7AH-12F100 V7AH-12F100 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 3.0V-5.5V Input 0.8V-3.3V/12A Output Efficiency Data 95.00% 100.00% 95.00% 90.00% 90.00% 4.5V 85.00% 3.6V 5.0V 85.00% 5.5V 4.5V 5.5V 80.00% 80.00% 75.00% 75.00% 70.00% 70.00% 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 X7AH-12F330 5 6 7 8 9 10 11 12 X7AH-12F250 95.00% 90.00% 90.00% 85.00% 3V 85.00% 3V 3.3V 3.3V 5V 5.5V 80.00% 75.00% 5V 80.00% 5.5V 75.00% 70.00% 1 2 3 4 5 6 7 8 9 10 11 70.00% 12 1 2 3 4 X7AH-12F180 5 6 7 8 9 10 11 12 X7AH-12F150 90.00% 90.00% 85.00% 85.00% 3V 3V 3.3V 5V 80.00% 5.5V 75.00% 3.3V 5V 80.00% 5.5V 75.00% 70.00% 70.00% 1 2 3 4 5 6 7 8 X7AH-12F120 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 X7AH-12F100 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 12 NON-ISOLATED DC/DC CONVERTERS 3.0V-5.5V Input 0.8V-3.3V/12A Output bel Pin Connections Pin Function 1 Remote On/Off (option) 2 Vin 3 Ground 4 Vout 5 Trim (option) 6 Remote Sense (option) 7 N/A Pin Connections bel bel Pin Function 1 Remote On/Off (option) 2 Vin 3 Ground 4 Vout 5 Trim (option) ©2004 Bel Fuse Inc. Specifications subject to change without notice. 090204 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