VRNB-40A180

NON-ISOLATED DC/DC CONVERTERS 12V Input / Programmable Output / 40A VRM 9.0 Compatible VRNB-40A180 • • • • PRELIMINARY RoHS Compliant High efficiency means less power dissipation Remote on/off 2-Wire Remote sense Optional 5 bit voltage programming schemes o Intel VRM 9.x compatible 1.1V to 1.85V o Motorola compatible 1.0V to 1.68V Adaptive voltage positioning • Description The VRNB-40A Series are non-isolated step down dc/dc converters providing up to 40A of output current and designed to be compatible to the Intel VRM 9.0 / 9.1 VID codes. Standard features include remote on/off, over current protection, remote sense and a power good signal. This product also makes use of adaptive positioning to improve transient response performance. These products are specifically design to power a wide variety of high performance microprocessors but may be used almost anywhere low-voltage silicon is being employed and a nominal 12V source is available. Typical applications include file servers, work stations and other computing applications. Input Specifications Parameter Input Voltage Range Input Current (disabled) Input Current (full load) Reflected Ripple Current Min 10.8 VDC Typ 30mA 8A 150mA rms With 100uF, 25mOhm capacitor and 200nH of input inductance. Max 13.2 VDC Notes Output Specifications Parameter Output Current Set Point Accuracy Adaptive Positioning (Droop Impedance) Ripple and Noise Min 0A 1.76V Typ 1.80 3.5 mOhm Max 40A 1.82 Notes no load, excluding Adaptive positioning, VID 00000 30mV pk-pk, 0 to 20MHz Bandwidth Full load with two external 560uF oscon capacitors on output. 16mS di/dt = 5A/uS Load step =50% of max load. Cout = two 820uF OSCON Turn on Time Transient Response Deviation Settling Time Remote Sense Compensation Output Capacitance 1200uF 8mS 90mV 175uS ±0.3VDC 20,000uF For applications requiring higher or lower output capacitance please consult factory. 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 12V Input / Programmable Output / 40A VRM 9.0 Compatible General Specifications Parameter Switching Frequency Dimensions inches mm Operating Temperature Non-Operating Temperature Protection Features Over current Undervoltage Remote On/Off Efficiency (full load) 1.85V output Specification 1.2 MHz typical (fixed) 3.8 x 1.0 x .81 96.5 x 25.4 x 20.6 0°C to 70°C -40°C to 100°C 110% to 170% max Io UVLO Vin < 9.5V Active High 86% Pin Connections Row A Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Row B Pin 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 Function VIN+ VIN+ VIN+ VIN+ Reserved No pin VID3 VID1 Memory PWRGD VO-senUVLO_SET VOVO+ VOVO+ VOVO+ VOVO+ VOVO+ VOVO+ VOVO+ VOVO+ VOVO+ VO- Function VINVINVINVINVRM-pres VID4 VID2 VID0 NC OUTEN VO-sen+ Reserved VO+ VO+ VOVO+ VOVO+ VOVO+ VOVO+ VOVO+ VOVO+ VOVO+ VOVO+ VO- Voltage Identification (VID) Code VID4 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 VID3 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 VID2 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 VID1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 VID0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 Vo (VDC) Output Off 1.1 1.125 1.15 1.175 1.2 1.225 1.25 1.275 1.3 1.325 1.35 1.375 1.4 1.425 1.45 1.475 1.5 1.525 1.55 1.575 1.6 1.625 1.65 1.675 1.7 1.725 1.75 1.775 1.8 1.825 1.85 Part Numbers There are two different models in this series based on different loop compensation for various types of capacitor banks. These models are as follows: VRNB-40A18B: Compensated for capacitor bank utilizing 4-6 820uF Oscon capacitors. VRNB-40A18M: Compensated for Oscon caps but all output voltages are divided by 1.1 yielding an effective range of 1.0 to 1.68V compatible with the requirements for new Motorola microprocessors. Note: Grounding pin 9 of this device doubles the output voltages shown in this table. 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 12V Input / Programmable Output / 40A VRM 9.0 Compatible Mechanical Outline Mechanical Drawing of the VRNB-40A18 Series Converters RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. ©2006 Bel Fuse Inc. Specifications subject to change without notice. 050406 CORPORATE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com FAR EAST 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 EUROPE 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