NON-ISOLATED DC/DC CONVERTERS 3.3V Input 0.9V-2.5V/3A Output x7AH-03C1A0 Series • Non-Isolated • OCP/SCP • High Efficiency • Wide Range Trim • Low Cost • Remote On/Off • Excellent Thermal Performance • Industrial Temperature Range • Input Under Voltage Lockout Description The Bel x7AH-03C1A0 modules are a series of non-isolated, step down DC/DC converters that operate from a nominal 3.3V source. These converters are available in a range of output voltages from 0.9V to 2.5V. It is packaged in a compact, overmolded package rated at 3A. 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 2.5V output 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 0.9-2.5V 2.5V 1.8V 1.5V 1.2V 0.9 V Input Voltage 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V Max. Output Current 3A 3A 3A 3A 3A 3A Max. Output Power 7.5W 7.5W 5.4W 4.5W 3.6W 2.7W Typical Efficiency 93% 93% 89% 87% 84% 81% Part Number Surface Mount S7AH-03C1A0 S7AH-03C250 S7AH-03C180 S7AH-03C150 S7AH-03C120 S7AH-03C090 Part Number Vertical Mount V7AH-03C1A0 V7AH-03C250 V7AH-03C180 V7AH-03C150 V7AH-03C120 V7AH-03C090 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 -0.3V Typ - Max 6V Output Enable Terminal Voltage -0.3V - 6V Ambient Temperature -40°C - 85°C Storage Temperature -55°C - 125°C Notes Input Specifications Parameter Input Voltage Input Current (no load) Min Typ Max 3V - 3.6V - - 110mA - - 3.1A 2.3A 1.9A 1.6A 1.2A - 7mA 14mA Notes Input Current (full load) VO=2.5V VO=1.8V VO=1.5V VO=1.2V VO=0.9V Remote Off Input 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 3.3V Input 0.9V-2.5V/3A Output Input Specifications (continued) Parameter Min Typ Max Input Reflected Ripple Current (pk-pk) - 50mA 100mA Input Reflected Ripple Current (RMS) - 15mA 25mA I t Inrush Current Transient - 0.01A s 0.02A s Turn on Voltage Threshold - 2.7V - Turn off Voltage Threshold - 2.4V - 2 2 Notes With simulated source impedance of 500nH, 5Hz to 20MHz; use a 270uF/6.3V capacitor with ESR=0.03 ohm max, at 100KHz. 2 Note: All specifications are typical at 25°C unless otherwise stated. Output Specifications Parameter Min Typ Max VO=2.5V VO=1.8V VO=1.5V VO=1.2V VO=0.9V 2.450V 1.764V 1.470V 1.176V 0.882V 2.5V 1.8V 1.5V 1.2V 0.9V 2.550V 1.836V 1.530V 1.224V 0.918V VO=2.5V VO=1.8V VO=1.5V VO=1.2V VO=0.9V - 1mV 1mV 1mV 1mV 1mV 5mV 5mV 5mV 5mV 5mV VO=2.5V VO=1.8V VO=1.5V VO=1.2V VO=0.9V - 1mV 1mV 1mV 1mV 1mV 5mV 5mV 5mV 5mV 5mV VO=2.5V VO=1.8V VO=1.5V VO=1.2V VO=0.9V - 10mV 10mV 10mV 10mV 10mV 20mV 20mV 20mV 20mV 20mV Output Current 0A - 3A Current Limit Threshold 5A - 9A - 0.04A s 2 0.04A s 0.04A2s 2 0.04A s 2 0.04A s Notes Output Voltage Set Point Test conditions: Vin=3.3V, Io= full load Line Regulation Load Regulation Regulation Over Temperature (-40°C to +85°C) Short Circuit Surge Transient VO=2.5V VO=1.8V VO=1.5V VO=1.2V VO=0.9V 2 2 0.08A s 2 0.08A s 0.08A2s 2 0.08A s 2 0.08A s 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 3.3V Input 0.9V-2.5V/3A Output Output Specifications (continued) Parameter Min Typ Max VO=2.5V VO=1.8V VO=1.5V VO=1.2V VO=0.9V - 10mV 10mV 10mV 10mV 10mV 20mV 20mV 20mV 20mV 20mV VO=2.5V VO=1.8V VO=1.5V VO=1.2V VO=0.9V - 45mV 45mV 45mV 45mV 45mV 70mV 70mV 70mV 70mV 70mV Turn on Time - 7mS 15mS Overshoot at Turn on - 0% 1% 0uF - 1200uF - 100mV 130mV - 30uS 60uS - 100mV 130mV Settling Time - 30uS 60uS Overshoot - 100mV 130mV - 30uS 60uS - 100mV 130mV Settling Time - 30uS 60uS Overshoot - 90mV 120mV - 30uS 60uS - 90mV 120mV Settling Time - 30uS 60uS Overshoot - 90mV 120mV Settling Time - 30uS 60uS - 90mV 120mV Settling Time - 30uS 60uS Overshoot - 90mV 120mV - 30uS 60uS - 90mV 120mV - 30uS 60uS Notes Ripple and Noise (RMS) Ripple and Noise (pk-pk) Output Capacitance Test conditions: 0-20MHz BW; 0.1uF ceramic capacitor and 10uF tantalum capacitor at the output. Transient Response 50% ~ 100% Max Load 100% ~ 50% Max Load 50% ~ 100% Max Load 100% ~ 50% Max Load 50% ~ 100% Max Load 100% ~ 50% Max Load 50% ~ 100% Max Load 100% ~ 50% Max Load 50% ~ 100% Max Load 100% ~ 50% Max Load Overshoot Settling Time Overshoot Settling Time Overshoot Settling Time Overshoot Overshoot Settling Time Overshoot Settling Time VO=2.5V VO=1.8V VO=1.5V VO=1.2V VO=0.9V Test conditions: di/dt=0.5A/us, Vin=3.3V, without any 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 3.3V Input 0.9V-2.5V/3A Output General Specifications Parameter Min Typ Max Notes 90% 86% 84% 81% 78% 93% 89% 87% 84% 81% - 250KHz 300KHz 340KHz 0 - 292%VO 90%Vo - - 110%Vo 110%Vo Efficiency VO=2.5V VO=1.8V VO=1.5V VO=1.2V VO=0.9V Switching Frequency Output Trim Range (wide trim) Output Trim Range (narrow trim) Vo=1.2V-2.5V Vo=0.9V MTBF Weight Vo=0.9V Calculated Per Bell Core TR-332 (IO = Nominal; Ta = 25°C) 3,131,719 hours Dimensions (surface mount) Inches (L × W × H) Millimeters (L × W × H) Dimensions (vertical) Inches (L × W × H) Millimeters (L × W × H) Measured at Vin=3.3V, 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 - Note: All specifications are typical at 25°C unless otherwise stated. Control Specifications Parameter Min Typ Max Signal Low (Unit Off) -0.3V - 0.3V Signal High (Unit On) 1.8V - 3.6V Notes Remote On/Off Remote on/off pin open, unit on. 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 3.3V Input 0.9V-2.5V/3A Output 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 Vout A = −B Vnom − Vadj Rtrimdown Module Trim GND Vout C Rtrimup = −D Vadj − Vnom Module Trim Rtrimup GND Vnom A B C D Notes 0.9 – 2.5 N/A 3.712 1.54 Vo=0.9V when Rtrim is open 2.5 N/A 7.9117 16.14 3.712 11.5 Vo=2.505V when Rtrim is open 1.8 4.6538 20.84 3.712 16.2 Vo=1.803V when Rtrim is open 1.5 3.2633 16.14 3.712 11.5 Vo=1.503V when Rtrim is open 1.2 1.8699 11.45 3.712 6.81 Vo=1.203V when Rtrim is open 0.9 N/A N/A 3.712 33.2 Vo=0.903V when Rtrim is open 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 3.3V Input 0.9V-2.5V/3A Output Efficiency Data MODULE 1.8V 100% EFFICIENCY EFFICIENCY MODULE 2.5V 3.0V 3.3V 3.6V 90% 80% 70% 100% 90% 3.0V 80% 3.3V 70% 3.6V 60% 60% 0.3 0.75 1.5 2.25 OUTPUT CURRENT 0.3 3 EFFICIENCY 3.3V 3.6V 2.25 3 100% 90% 80% 70% 60% 50% 3.0V 3.3V 3.6V 0.3 3 0.75 1.5 2.25 3 OUTPUT CURRENT OUTPUT CURRETN MODULE 0.9V EFFICIENCY EFFICIENCY 3.0V 1.5 2.25 MODULE 1.2V 100% 90% 80% 70% 60% 50% 0.75 1.5 OUTPUT CURRENT MODULE 1.5V 0.3 0.75 100% 80% 3.0V 3.3V 60% 3.6V 40% 0.3 0.75 1.5 2.25 3 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 3.3V Input 0.9V-2.5V/3A Output Thermal Derating Curve 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 3.3V Input 0.9V-2.5V/3A Output S7AH-03C1A0 bel Pin Connections Pin Function 1 Remote On/Off (option) 2 Vin 3 Ground 4 Vout 5 Trim (option) 6 N/A 7 N/A V7AH-03C1A0 bel Pin Connections bel bel 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. 011705 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