Features

• MTBF: MIL-HDBK-217F @ +25°C Derating: 1.7 %/K above +55°C (positive circuit) Derating: 2.5 %/K above +65°C (negative circuit) For input voltage higher than 36 Vdc an input capacitor 22 μF/ 50 V is required Load regulation is shown at 0-100 %, for 10-90% the load regulation would be 0.3 %. 3. Traco 1A SMD Step Down Switching Regulator - TSRN-1SM Series. TSRN-1SM series step-down switching regulators with a wide input voltage range of up to 42 Vdc and a high efficiency of up to 95% which allows full load operation without the need for a heatsink or forced air cooling. These TSRN-1SM series 1A step-down switching regulators are suitable for positive and negative output circuits (see table for additional data) and have trim input for output voltage adjustment. A low standby power consumption and high efficiency makes these switching regulators ideal for use in energy saving applications. Compact SMD package Input voltage range up to 42 VDC Built in filter capacitors No heat-sink required Adjustable output voltage Low standby current: Positive output circuit : 1.5 mA for stock number ; 755-3447 755-3447 , 4 mA for all other models. Negative output circuit : -3.3 / -5.5 V models: 3 mA, -9.0 / -12 V models: 7 mA and 10 mA for stock number ; 755-3457 755-3457 Excellent line and load regulation Over-temperature and short circuit protection Remote On/Off input Moisture sensitivity level (MSL) 1