NON-ISOLATED DC/DC CONVERTERS 5 V-24 V Input 0.9 V-3.3 V/3 A Output x7AH-03L1A0 • Non-Isolated • Remote On/Off • High Efficiency • Fixed Frequency • High Power Density • OCP/SCP • Low Cost Description The Bel x7AH-03L1A0 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 an output voltage range from 0.9 V to 3.3 V. It is packaged in a compact, overmolded package rated at 3 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 for 3.3 V output is typically 88% at full load. Typical features include remote on/off, over current protection and short circuit protection. Part Selection Output Voltage 0.9 V - 3.3 V Input Voltage 5.0 V – 24 V Max. Output Current 3A Max. Output Power 10 W Typical Efficiency 88% Part Number Surface Mount S7AH-03L1A0 Part Number Vertical Mount V7AH-03L1A0 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 -40 °C Typ - Max 25 V 24 V 85 °C 125 °C Notes Input Specifications Parameter Min Typ Max 5V 5V 5V 5V 5V 5V - 3 mA 24 V 24 V 18 V 15 V 12 V 9V 100 mA 3A 10 mA Input Reflected Ripple Current (pk-pk) - 200 mA - Input Reflected Ripple Current (rms) - 50 mA - Notes Input Voltage VO=3.3 V VO=2.5 V VO=1.8 V Vo=1.5 V Vo=1.2 V Vo=0.9 V Input Current (no load) Input Current (full load) Remote Off Input Current 2 I t Inrush Current Transient Turn on Voltage Threshold Turn off Voltage Threshold 3.5 V 2 0.05 A s 4.0 V - With simulated source impedance of 500 nH, 5 Hz to 20 MHz. Use one 100 uF/ 35 V Tantalum capacitor and one 3.3 uF/ 50 V ceramic capacitor at the input 2 0.1 A s 4.9 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 5 V-24 V Input 0.9 V-3.3 V/3 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 VO=0.9 V 3.200 V 2.425 V 1.746 V 1.470 V 1.176 V 0.882 V 3.3 V 2.5 V 1.8 V 1.5V 1.2 V 0.9 V 3.400 V 2.575 V 1.854 V 1.530 V 1.224 V 0.918 V VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V - ±10 mV ±10 mV ±5 mV ±5 mV ±5 mV ±3 mV ±20 mV ±15 mV ±10 mV ±10 mV ±10 mV ±7.5 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 Regulation Over Temperature (-40 °C to +85 °C) VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V Output Current Range Output DC Current Limit Short Circuit Surge Transient Ripple and Noise (rms) Ripple and Noise (pk-pk) VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V Turn on Time Overshoot at Turn on Output Capacitance Transient Response Overshoot 50% ~ 100% Max Load Settling Time 3.3 V Overshoot 100% ~ 50% Max Load Settling Time Overshoot 50% ~ 100% Max Load Settling Time 0.9 V-2.5 V Overshoot 100% ~ 50% Max Load Settling Time - ±25 mV ±15 mV ±10 mV ±10 mV ±8 mV ±5 mV ±45 mV ±35 mV ±25 mV ±20 mV ±15 mV ±13 mV 0A 4A - ±30 mV ±25 mV ±20 mV ±15 mV ±10 mV ±8 mV 2 0.8 A s 30 mV ±60 mV ±45 mV ±33 mV ±27 mV ±22 mV ±16 mV 3A 8A 2 1.5 A s 50 mV 0 uF 70 mV 70 mV 60 mV 60 mV 50 mV 50 mV 7 mS 0% - 130 mV 100 mV 100 mV 100 mV 100 mV 100 mV 10 mS 3% 1200 uF Notes Test conditions: Io=50% full load. Line Regulation Load Regulation - 150 mV 50 uS 150 mV 50 uS 100 mV 50 uS 100 mV 50 uS 200 mV 100 uS 200 mV 100 uS 150 mV 100 uS 150 mV 100 uS Test conditions: 0-20 MHz BW, with 1 uF /16 V ceramic capacitor at the output. Test conditions: di/dt = 0.5 A/us, with 220 uF external 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 5 V-24 V Input 0.9 V-3.3 V/3 A Output General Specifications Parameter Min Typ Max Notes 85% 82% 79% 77% 74% 72% 88% 85% 82% 80% 77% 75% - 250 kHz 300 kHz 360 kHz 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 MTBF Calculated Per Bell Core TR-332 (Vin=12 V; Vo=3.3 V; IO =2.4 A; Ta = 25 °C) 9,900,543 hours Dimensions (surface mount) Inches (L × W × H) Millimeters (L × W × H) Dimensions (vertical) Inches (L × W × H) Millimeters (L × W × H) Weight Vin=12.0V; lo=lo, max 0.78 x 0.7 x 0.32 19.81 x 17.78 x 8.13 0.7 x 0.308 x 0.65 17.78 x 7.82 x 16.51 - 4.9 g - Control Specifications Parameter Remote On/Off Min Typ Max Signal Low (Unit Off) -0.3 V - 1V Signal High (Unit On) 2.8 V - 24 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 Up resistor should be connected between the Trim pin and Ground. Only one of the resistors should be used for any given application. Rtrim− up 6.928 = −1 Vadj − Vo Vout Module Trim Rtrim-up GND Note: Output voltage Vo=0.902 V when Rtrim_up 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 5 V-24 V Input 0.9 V-3.3 V/3 A Output Efficiency Data 3.3V module 100.0% Efficiency 90.0% 80.0% 5V 12V 24V 70.0% 60.0% 50.0% 40.0% 0.3A 0.75A 1.5A 2.25A 3A Output current 1.8V module 100.0% Efficiency 90.0% 80.0% 5V 12V 18V 70.0% 60.0% 50.0% 40.0% 0.3A 0.75A 1.5A 2.25A 3A Output current 0.9V module 100.0% Efficiency 90.0% 80.0% 5V 7V 9V 70.0% 60.0% 50.0% 40.0% 0.3A 0.75A 1.5A 2.25A 3A Output current 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 5 V-24 V Input 0.9 V-3.3 V/3 A Output Thermal Derating Curve x7AH-03L1A0 . 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 5 V-24 V Input 0.9 V-3.3 V/3 A Output S7AH-03L1A0 bel Pin Connections Pin Function 1 Remote On/Off 2 Vin 3 Ground 4 Vout 5 Trim 6 N/A 7 N/A V7AH-03L1A0 bel bel Pin Connections Pin Function 1 Remote On/Off 2 Vin 3 Ground 4 Vout 5 Trim 2005 Bel Fuse Inc. Specifications subject to change without notice. 040805 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