date 06/2010 page 1 of 4 a division of CUI INC SERIES: DESCRIPTION: NDM1-25 DIGITAL DC-DC POL CONVERTER SPECS System Vin 8.5 ~ 14 V Vout 0.6 ~ 2.5 V Iout 25 A Footprint (w x l x h) 0.5” x 1.075” x 0.47” Efficiency 92% RoHS FEATURES Auto-control™ technology •Automatic adjustment of control loop compensation (adapts to changes in external output capacitance) •Guaranteed stability •Superior transient response Precise power conversion •8.5 ~ 14 V dc input •Programmable output •Differential voltage sense •10 mV set point accuracy PMBus compliant •On-board digital communication bus Fully licensed digital module Monitoring •Precise current monitoring •Temperature sensing Power management •Voltage sequencing •Voltage margining •Synchronize controllers for multiphase operation •Programmable soft start and soft stop •Pre-bias startup •High reliability non-volatile OTP memory to 125°C •Low current (<2 μA) disable state Protection features •Input under voltage lockout •Output over voltage protection •Output over current protection •Fast over current protection •Over temperature protection Mounting •Through hole •Modules are footprint compatible Preliminary: Specifications subject to change For a detailed specification, please contact CUI Auto-control is a trademark of Powervation 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382 www.novumdigital.com date 06/2010 page 2 of 4 a division of CUI INC SERIES: DESCRIPTION: NDM1-25 DIGITAL DC-DC POL CONVERTER INPUT / SUPPLY parameter conditions/description min nom max units 8.5 12 14 V 50 mA 7.5 8.7 UVLO turn-off threshold 7.5 8.1 voltage monitoring accuracy -50 50 mV current monitoring accuracy -8 8 % max units 2.5 V voltage idle current sysgood, no output, VIN = 12 V UVLO turn-on threshold V V OUTPUT parameter conditions/description min voltage adjustment range1 set using PMBus 0.6 voltage accuracy nom 1 current range %nom 0 25 A line regulation VIN = 8.5 ~ 14 V -1 1 % load regulation VIN = 12 V -1 1 % -1 1 % voltage monitoring accuracy temp. monitoring accuracy -5 SENSE+ input bias current SENSE+ = 4V SENSE- input bias current SENSE- = 0.1V ramp-up time ON time delay range 864 1,000 20 25 30 μA 147.5 ms 0 1,000 ms 50 ms load transient voltage deviation VIN = 12 V, CO = 470 μF, VO = 1 V recommended minimum output capacitor °C μA 0.5 start-up time load transient recovery time 5 1,185 -45/33 mV 150 μs 470 voltage ripple voltage margin range1 μF 8 25 mVp-p -20 5 20 % min nom max units 50 W 1.Voltage absolute maximum of 2.8 V GENERAL / POWER / EFFICIENCY parameter conditions/description output power 0 efficiency VIN VIN VIN VIN idle power = = = = 12 12 12 12 V, V, V, V, VO VO VO VO = = = = 1 V, 50% of maximum IO 1 V, maximum IO 2.5 V, 50% of maximum IO 2.5 V, maximum IO 86.9 83.3 92.0 89.9 sysgood, no output, VIN = 12 V switching frequency 375 2 % % % % 0.6 W 500 kHz 2. Factory default set to 500 kHz Preliminary: Specifications subject to change For a detailed specification, please contact CUI 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382 www.novumdigital.com date 06/2010 page 3 of 4 a division of CUI INC SERIES: DESCRIPTION: NDM1-25 DIGITAL DC-DC POL CONVERTER 1.0V / 25A TYPICAL CHARACTERISTICS Efficiency Output Load Transient Response 98.15 mV AC 90 8.5 Vin 10 Vin 12 Vin 14 Vin 85 Efficiency (%) 80 75 209.8 mV DC 58.15 189.8 18.15 169.8 -21.85 149.8 70 -61.85 129.8 65 -101.9 109.8 60 -141.9 89.81 55 -181.9 69.81 -221.9 49.81 -261.9 29.81 50 0 5 10 15 20 25 Output Current (A) -301.9 -2.511 ms -2.011 -1.511 -1.011 -0.511 -0.011 0.489 2010-2-20 5:29:01 Output Voltage Response to Load Current step-change (5-15-5 A) Top Trace: Output Voltage Start-up Top Trace: Output Voltage (0.5 V / div) Bottom Trace: Input Voltage (5 V / div) 0.989 1.489 1.989 9.815 2.489 1 2 ∆ 1/∆ Time Axis -1.453 ms -1.3 ms 153.0 µs 6.536 kHz Channel A -42.7 mV 33.1 mV 75.8 mV Bottom Trace: Load Current CO = 470 μF Shut-down Time Scale: (10 ms / div) Top Trace: Output Voltage (0.5 V / div) Bottom Trace: Input Voltage (5 V / div) Time Scale: (20 ms / div) Output Ripple and Noise Conditions (applies to all graphs unless stated otherwise): VI = 12 V IO = 25 A load Co = 1,500 μF Trace: Output Voltage (2 mV / div) Time Scale: (2 μs / div) 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 Preliminary: Specifications subject to change For a detailed specification, please contact CUI fax 503.612.2382 www.novumdigital.com 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 PC FILE NAME: NDM1-25 Vin 20 21 22 GND 23 Vo 24 2.86 0.113 COPYRIGHT 2010 BY CUI INC. RECOMMENDED FOOTPRINT: TOP VIEW 1.27 0.050 (17 PLCS) 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 19 10.16 0.400 2.54 0.100 (4 PLCS) 1.27 0.050 (18 PLCS) 9.91 0.390 1.52 0.060 (6 PLCS) 2.86 0.113 ZRJ DRAWN BY: NDM1-25 NDM1-25 PART NO. TITLE: APPROVED BY: UNITS: 20050 SW 112th Ave. Tualatin, OR 97062 Phone: 503-612-2300 800-275-4899 Fax: 503-612-2383 Website: www.cui.com TOLERANCE: ±0.1mm UNLESS OTHERWISE SPECIFIED A 3:1 SCALE: MM [INCHES] REV: RoHS DESCRIPTION: 4.13 0.163 4.0 0.157 DATE 2/22/2010 NDM1-25 11.9 0.469 7.2 0.283 DESCRIPTION NEW DRAWING SERIES: 1.7 0.067 12.7 0.500 27.31 1.075 REV. A a division of CUI INC date 06/2010 page 4 of 4 DIGITAL DC-DC POL CONVERTER MECHANICAL DRAWING (THROUGH-HOLE) Preliminary: Specifications subject to change For a detailed specification, please contact CUI fax 503.612.2382 www.novumdigital.com