SRAH-03C1A0 BEL | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 9
Technical content
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 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/3 A Output
- Non-Isolated • OCP/SCP
- High Efficiency • Wide Range Trim
- Low Cost • Remote On/Off
- Excellent Thermal Performance • Industrial Temperature Range
- Input Under Voltage Lockout • UL60950-1 Recognized (UL/cUL)
Description
The Bel xRAH-03C1A0 modules are a series of non-isolated, step down dc/dc converters that operate from a 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 2.5 Vdc 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 Input Voltage Max. Output Current Max. Output Power Typical Efficiency Part Number Surface Mount Part Number Vertical Mount 0.9 Vdc - 2.5 Vdc 3.3 Vdc 3 A 7.5 W 93% SRAH-03C1A0 VRAH-03C1A0 2.5 Vdc 3.3 Vdc 3 A 7.5 W 93% SRAH-03C250 VRAH-03C250 1.8 Vdc 3.3 Vdc 3 A 5.4 W 89% SRAH-03C180 VRAH-03C180 1.5 Vdc 3.3 Vdc 3 A 4.5 W 87% SRAH-03C150 VRAH-03C150 1.2 Vdc 3.3 Vdc 3 A 3.6 W 84% SRAH-03C120 VRAH-03C120 0.9 Vdc 3.3 Vdc 3 A 2.7 W 81% SRAH-03C090 VRAH-03C090 Notes: 1. Add “0” suffix at the end of the model number to indicate “Tube Packaging”, and “R” for “Reel Packaging”, and “G” for “Tray Packaging”. 2. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers. Absolute Maximum Ratings Parameter Min Typ Max Notes Input Voltage (continuous) -0.3 V - 6 V Output Enable Terminal Voltage -0.3 V - 6 V Ambient Temperature -40 °C - 85 °C Storage Temperature -55 °C - 125 °C Input Specifications Parameter Min Typ Max Notes Input Voltage 3 V - 3.6 V Input Current (no load) - - 110mA Input Current (full load) VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V 3.1 A 2.3 A 1.9 A 1.6 A 1.2 A Remote Off Input Current - 7 mA 14 mA xRAH-03C Series RoHS Compliant Rev.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 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/3 A Output Input Specifications (continued) Parameter Min Typ Max Notes Input Reflected Ripple Current (pk-pk) - 50 mA 100 mA Input Reflected Ripple Current (rms) - 15 mA 25 mA With simulated source impedance of 500 nH, 5 Hz to 20 MHz; use a 270 uF/6.3 V capacitor with ESR=0.03 ohm max, at 100 kHz. I2t Inrush Current Transient - 0.01 A 2s 0.02 A 2s Turn on Voltage Threshold - 2.7 V - Turn off Voltage Threshold - 2.4 V - Note: All specifications are typical at 25 °C unless otherwise stated. Output Specifications Parameter Min Typ Max Notes Output Voltage Set Point VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V 2.450 V 1.764 V 1.470 V 1.176 V 0.882 V 2.5 V 1.8 V 1.5 V 1.2 V 0.9 V 2.550 V 1.836 V 1.530 V 1.224 V 0.918 V Test conditions: Vin=3.3 V, Io= full load Line Regulation VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V 1 mV 1 mV 1 mV 1 mV 1 mV 5 mV 5 mV 5 mV 5 mV 5 mV Load Regulation VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V 1 mV 1 mV 1 mV 1 mV 1 mV 5 mV 5 mV 5 mV 5 mV 5 mV Regulation Over Temperature (-40 °C to +85 °C) VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V 10 mV 10 mV 10 mV 10 mV 10 mV 20 mV 20 mV 20 mV 20 mV 20 mV Output Current 0 A - 3 A Current Limit Threshold 5 A - 9 A Short Circuit Surge Transient VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V 0.04 A
0.04 A2s
0.08 A2s
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 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/3 A Output Output Specifications (continued) Parameter Min Typ Max Notes Ripple and Noise (rms) VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V 10 mV 10 mV 10 mV 10 mV 10 mV 20 mV 20 mV 20 mV 20 mV 20 mV Ripple and Noise (pk-pk) VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V 45 mV 45 mV 45 mV 45 mV 45 mV 70 mV 70 mV 70 mV 70 mV 70 mV Test conditions: 0-20 MHz BW; 0.1 uF ceramic capacitor and 10 uF tantalum capacitor at the output. Turn on Time - 7 mS 15 mS Overshoot at Turn on - 0% 1% Output Capacitance 0 uF - 1200 uF Transient Response Overshoot - 100 mV 130 mV 50% ~ 100% Max Load Settling Time - 30 uS 60 uS Overshoot - 100 mV 130 mV 100% ~ 50% Max Load Settling Time VO=2.5 V - 30 uS 60 uS Overshoot - 100 mV 130 mV 50% ~ 100% Max Load Settling Time - 30 uS 60 uS Overshoot - 100 mV 130 mV 100% ~ 50% Max Load Settling Time VO=1.8 V - 30 uS 60 uS Overshoot - 90 mV 120 mV 50% ~ 100% Max Load Settling Time - 30 uS 60 uS Overshoot - 90 mV 120 mV 100% ~ 50% Max Load Settling Time VO=1.5 V - 30 uS 60 uS Overshoot - 90 mV 120 mV 50% ~ 100% Max Load Settling Time - 30 uS 60 uS Overshoot - 90 mV 120 mV 100% ~ 50% Max Load Settling Time VO=1.2 V - 30 uS 60 uS Overshoot - 90 mV 120 mV 50% ~ 100% Max Load Settling Time - 30 uS 60 uS Overshoot - 90 mV 120 mV 100% ~ 50% Max Load Settling Time VO=0.9 V - 30 uS 60 uS Test conditions: di/dt=0.5 A/us, Vin=3.3 V, 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 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/3 A Output General Specifications Parameter Min Typ Max Notes Efficiency VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V 90% 86% 84% 81% 78% 93% 89% 87% 84% 81% Measured at Vin=3.3 V, full load and Ta=25 °C Switching Frequency 250 kHz 300 kHz 340 kHz Output Trim Range (wide trim) 0 - 292%V O Vo=0.9 V Output Trim Range (narrow trim) Vo=1.2 V - 2.5 V Vo=0.9 V 90%Vo 110%Vo 110%Vo MTBF 3,131,719 hours Calculated Per Bell Core SR-332 (IO = Nominal; Ta = 25 °C) Dimensions (surface mount) Inches (L × W × H) Millimeters (L × W × H) 0.78 x 0.70 x 0.32 19.81 x 17.78 x 8.13 Dimensions (vertical) Inches (L × W × H) Millimeters (L × W × H) 0.70 x 0.308 x 0.65 17.78 x 7.82 x 16.51 Weight - 5 g - Note: All specifications are typical at 25 °C unless otherwise stated. Control Specifications Parameter Min Typ Max Notes Remote On/Off Signal Low (Unit Off) -0.3 V - 0.3 V Signal High (Unit On) 1.8 V - 3.6 V 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 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/3 A Output Output Trim Equations Equations for calculating the trim resistor (in k Ω) 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. BVV AR adjnom trimdown −−= DVV CR nomadj trimup −−= Vnom A B C D Notes 0.9 N/A N/A 3.712 33.2 Vo=0.903 V when Rtrim is open Module Vout Trim GND Rtrimdown Module Vout Trim GND Rtrimup
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 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/3 A Output Efficiency Data MODULE 2.5V 60% 70% 80% 90% 100% 0 . 30 . 7 51 . 52 . 2 5 3 OUTPUT CURRENT EFFICIENCY 3.0V 3.3V 3.6V MODULE 1.8V 60% 70% 80% 90% 100% 0.3 0.75 1.5 2.25 3 OUTPUT CURRENT EFFICIENCY 3.0V 3.3V 3.6V MODULE 1.5V 50% 60% 70% 80% 90% 100% 0.3 0.75 1.5 2.25 3 OUTPUT CURRETN EFFICIENCY 3.0V 3.3V 3.6V MODULE 1.2V 50% 60% 70% 80% 90% 100% 0.3 0.75 1.5 2.25 3 OUTPUT CURRENT EFFICIENCY 3.0V 3.3V 3.6V MODULE 0.9V 40% 60% 80% 100% 0.3 0.75 1.5 2.25 3 OUTPUT CURRENT EFFICIENCY 3.0V 3.3V 3.6V
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 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/3 A Output Thermal Derating Curve Ripple and Noise Waveform Ripple and noise at full load, 3.3 V input, 2.5 V output Note: Ripple and Noise with 0.1 uF/16 V X7R ceramic capacitor and 10 uF tantalum capacitor at the output, Ta=25 deg 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 CONVERTERS 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/3 A Output Transient Response Waveforms 50% to 100% load Transient at 3.3 V input, 2.5 V output 100% to 50% load Transient at 3.3 V input, 2.5 V output Note: Transient Response at di/dt=0.5A/uS, Ta=25 deg C.
©2007 Bel Fuse Inc. Specifications subject to change without notice. 010807 CORPORATE FAR EAST EUROPE Bel Fuse Inc. Bel Fuse Ltd. Bel Fuse Europe Ltd.
206 Van Vorst Street 8F/ 8 Luk Hop Street Preston Technology Management Centre
Jersey City, NJ 07302 San Po Kong Marsh Lane, Suite G7, Preston Tel 201-432-0463 Kowloon, Hong Kong Lancashire, PR1 8UD, U.K. Fax 201-432-9542 Tel 852-2328-5515 Tel 44-1772-556601 www.belfuse.com Fax 852-2352-3706 Fax 44-1772-888366 www.belfuse.com www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/3 A Output Mechanical Outline SRAH-03C1A0 VRAH-03C1A0 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. Pin Connections Pin Function