The high performance 20A UIS48T20033 DC-DC converter provides a high th efficiency single output, in a 1/16 brick package. Specifically designed for operation in systems that have limited airflow and increased ambient temperatures, the UIS48T20033 converter utilizes the same pinout and Input/Output functionality of the industry-standard sixteenth bricks. In addition, a baseplate / heat spreader feature is available (-xDxBx suffix) that provides an effective thermal interface for coldplate and heat sinking options. The UIS48T20033 converter thermal performance is accomplished through the use advanced circuits, packaging, and processing techniques to achieve ultra-high efficiency, excellent thermal management, and a low-body profile. Operating from a wide-range 18-75V input, the UIS48T20033 converter utilizes digital control and provides a fully regulated 3.3V output voltage. The designer can expect reliability improvement over other available converters because of the UIS48T20033s optimized thermal efficiency. Key Features & Benefits Industry-standard sixteenth-brick pin-out Ultra wide input voltage range Delivers 66W at 90% efficiency Paste In Hole (PIH) compatible Withstands 100V input transient for 100ms Fixed-frequency operation On-board input differential LC-filter Start-up into pre-biased load No minimum load required Minimum of 2,250V I/O isolation DC Fully protected (OTP, OCP, OVP, UVLO) Positive or negative logic ON/OFF option Low height of 0.453 (11.5mm) Weight: 18g w/o baseplate / heat spreader, 24g w/ baseplate / heat spreader High reliability: MTBF = 14.3 million hours, calculated per Telcordia SR-332, Method I Case 1 Approved to the latest edition of the following standards: UL/CSA60950-1, IEC60950-1 and EN60950-1 Designed to meet Class B conducted emissions per FCC and EN55022 when used with external filter All materials meet UL94, V-0 flammability rating Applications Intermediate Bus Architectures Data communications/processing LAN/WAN Servers, storage, instrumentation, embedded equipment END OF LIFE2 UIS48T20033 1. ELECTRICAL SPECIFICATIONS Conditions: T = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Cin = 100 F, unless otherwise specified. A PARAMETER NOTES MIN TYP MAX UNITS ABSOLUTE MAXIMUM RATINGS Continuous -0.3 80 VDC Input Voltage Transient (100ms) 100 VDC Ambient (TA) -40 85 C Operating Temperature 1 (See Derating Curves) Component (T ) -40 125 C C Storage Temperature -55 125 C ISOLATION CHARACTERISTICS Input to Output 2250 VDC Isolation Voltage Input to Baseplate 1500 VDC Output to Baseplate 1500 VDC Isolation Resistance 10 M Isolation Capacitance - pF FEATURE CHARACTERISTICS Switching Frequency 330 kHz Output Overvoltage Protection Non-latching 115 125 130 % 1 Over Temperature Shutdown Non-latching Component (TC) 130 C Auto-Restart Period Applies to all protection features 500 ms Turn-On Time from Vin Time from UVLO to Vo = 90% VOUT(NOM), Resistive load 100 130 ms Turn-On Time from ON/OFF Control Time from ON to Vo = 90% V (NOM), Resistive load 100 130 ms OUT Turn-On Time from Vin Time from UVLO to Vo = 90% VOUT(NOM) 100 130 ms (w/ Co max.) Resistive load, C = 10000 F load EXT Turn-On Time from ON/OFF Control Time from ON to Vo = 90% V (NOM) OUT 100 130 ms (w/ Co max.) Resistive load, CEXT = 10000 F load Converter Off (logic low) -15 0.8 VDC ON/OFF Control (Positive Logic) Converter On (logic high) 2.4 15 VDC Converter Off (logic low) 2.4 15 VDC ON/OFF Control (Negative Logic) Converter On (logic high) -15 0.8 VDC INPUT CHARACTERISTICS Operating Input Voltage Range 18 48 75 VDC Input Undervoltage Lockout Turn-on Threshold 16.8 17.2 17.8 VDC Turn-off Threshold 14.9 15.5 16.1 VDC Lockout Hysteresis Voltage 0.5 1.7 2.3 VDC Maximum Input Current Po = 66 W 5 ADC Input Standby Current Vin = 48 V, converter disabled 3 5 mA Input No Load Current Vin = 48V, converter enabled (No load on the output) 50 100 mA 500 mA PK-PK Input Reflected-Ripple Current, ic 160 mARMS Vin = 48 V, 20 MHz bandwidth, Po = 66 W (Figs. 14,15, 16) 38 mA PK-PK Input Reflected-Ripple Current, i S 6 mARMS Input Voltage Ripple Rejection 120 Hz 45 dB 1 Reference Figure H for component TC locations. tech.support psbel.com END OF LIFE