The SemiQ Family of DC-DC converters provides a high efficiency single output in a size that is only 60% of industry-standard quarter-bricks, while preserving the same pinout and functionality. In high temperature environments, for output voltages ranging from 3.3 V to 1.0 V, the thermal performance of SemiQ converters exceeds that of most competitors 20 -30 A quarter-bricks. This is accomplished through the use of patent pending circuit, packaging and processing techniques to achieve ultra-high efficiency, excellent thermal management and a very low body profile. Low body profile and the preclusion of heat sinks minimize airflow shadowing, thus enhancing cooling for downstream devices. The use of 100% automation for assembly, coupled with advanced electric and thermal design, results in a product with extremely high reliability. Operating from an 18-36 V input, the SQ24 Series converters of the SemiQ Family provide any standard output voltage from 12 V down to 1.0 V. Outputs can be trimmed from 20% to +10% of the nominal output voltage (10% for output voltages 1.2 V and 1.0 V), thus providing outstanding design flexibility. With a standard pinout and trim equations, the SQ24 Series converters are perfect drop-in replacements for existing quarter brick designs. Inclusion of this converter in new designs can result in significant board space and cost savings. The device is also available in a surface mount package. In both cases the designer can expect reliability improvement over other available converters because of the SQ24 Series optimized thermal efficiency. 18-36 VDC Input Outputs from 1-12 VDC Available in through-hole and SM packages Outputs available in 12.0, 8.0, 6.0, 5.0, 3.3, 2.5, 2.0, 1.8, 1.5, 1.2 & 1.0 V High efficiency no heat sink required On-board input differential LC-filter Extremely low output and input ripple Start-up into pre-biased output No minimum load required Fixed-frequency operation Fully protected Remote output sense Output voltage trim range: +10%/20% (except 1.2 V and 1.0 V outputs with trim range 10%) with industry standard trim equations High reliability: MTBF of 3.4 million hours, calculated per Telcordia TR- 332, Method I Case 1 Positive or negative logic ON/OFF option All materials meet UL94, V-0 flammability rating Approved to the latest edition and amendment of ITE Safety standards, UL/CSA 60950-1 and IEC60950-1 RoHS lead-free solder and lead-solder-exempted products are available 2 SQ24 Series 1 ELECTRICAL SPECIFICATIONS Conditions: T = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 24 VDC, All output voltages, unless otherwise specified. A PARAMETER NOTES MIN TYP MAX UNITS Absolute Maximum Ratings Input Voltage Continuous 0 40 VDC Operating Ambient Temperature -40 85 C Storage Temperature -55 125 C Input Characteristics Operating Input Voltage Range 18 24 36 VDC Turn-on Threshold 16 17 17.5 VDC Input Under Voltage Lockout (Non-latching) Turn-off Threshold 15 16 16.5 VDC Isolation Characteristics I/O Isolation 2000 VDC 1.0 - 3.3 V 160 pF Isolation Capacitance 5.0 - 6.0 V 260 pF 8.0 V, 12 V 230 pF Isolation Resistance 10 M Feature Characteristics Switching Frequency 415 kHz Industry-std. equations (1.5 - 12 V) -20 +10 % 1 Output Voltage Trim Range Industry-std. equations (1.0 - 1.2 V) -10 +10 % 1 Remote Sense Compensation Percent of V (NOM) +10 % OUT Non-latching (1.5 - 12 V) 117 125 140 % Output Over-Voltage Protection Non-latching (1.0 - 1.2 V) 124 132 140 % Auto-Restart Period Applies to all protection features 100 ms Turn-On Time 4 ms Converter Off -20 0.8 VDC ON/OFF Control (Positive Logic) Converter On 2.4 20 VDC Converter Off 2.4 20 VDC ON/OFF Control (Negative Logic) Converter On -20 0.8 VDC 1 Vout can be increased up to 10% via the sense leads or up to 10% via the trim function, however total output voltage trim from all sources should not exceed 10% of V (NOM), in order to insure specified operation of over-voltage protection circuitry. See Output Voltage Adjust/Trim for detailed OUT information. tech.support psbel.com