Non-Isolated DC/DC Converter (POL) TSR 1 Series, 1 A Up to 96% efficiency No heat-sink required Pin compatible with LMxx linear regulators SIP-package fits existing TO-220 footprint The TSR 1 series step-down switching regulators are drop-in replacement for Built in filter capacitors inefficient 78xx linear regulators. A high efficiency up to 96% allows full load Operation temp. range 40C to +85C operation up to +60C ambient temperature without the need of any heat-sink or forced cooling. The TSR 1 switching regulators provide other significant fea- Short circuit protection tures over linear regulators, i.e. better output accuracy (2%), lower standby Wide input operating range current of 2 mA and no requirement of external capacitors. The high efficiency and low standby power consumption makes these regulators an ideal solution Excellent line / load regulation for many battery powered applications. Low standby current 3-year product warranty Models Order Code Output Current Input Voltage Output Voltage Efficiency max. Range nom. typ. TSR 1-2412 1.2 VDC 74 % (at Vin min.) TSR 1-2415 1.5 VDC 78 % (at Vin min.) 4.6 - 36 VDC (9 VDC nom.) TSR 1-2418 1.8 VDC 82 % (at Vin min.) TSR 1-2425 2.5 VDC 87 % (at Vin min.) 4.75 - 36 VDC (9 VDC nom.) 3.3 VDC 91 % (at Vin min.) TSR 1-2433 1 000 mA TSR 1-2450 6.5 - 36 VDC (12 VDC nom.) 5 VDC 94 % (at Vin min.) TSR 1-2465 9 - 36 VDC (12 VDC nom.) 6.5 VDC 93 % (at Vin min.) TSR 1-2490 12 - 36 VDC (24 VDC nom.) 9 VDC 95 % (at Vin min.) TSR 1-24120 15 - 36 VDC (24 VDC nom.) 12 VDC 95 % (at Vin min.) TSR 1-24150 18 - 36 VDC (24 VDC nom.) 15 VDC 96 % (at Vin min.) Note - For input voltage higher than 32 VDC an external input capacitor (22 F) is required. Page 1 / 3 www.tracopower.com April 27, 2020TSR 1 Series, 1 A Input Specifications Input Current - At no load 9 Vin models: 1 mA typ. 12 Vin models: 1 mA typ. 24 Vin models: 1 mA typ. - At full load 9 Vin models: 1 000 mA max. 12 Vin models: 1 000 mA max. 24 Vin models: 1 000 mA max. (at Vin min.) Reflected Ripple Current 150 mAp-p typ. 9 Vin models: 150 mAp-p typ. 12 Vin models: 150 mAp-p typ. 24 Vin models: Recommended Input Fuse - 9 Vin input 1.2 Vout models: 630 mA (slow blow) 1.5 Vout models: 800 mA (slow blow) 1.8 Vout models: 800 mA (slow blow) 2.5 Vout models: 1 250 mA (slow blow) 3.3 Vout models: 1 250 mA (slow blow) - 12 Vin input 5 Vout models: 1 600 mA (slow blow) 6.5 Vout models: 1 250 mA (slow blow) - 24 Vin input 9 Vout models: 1 250 mA (slow blow) 12 Vout models: 1 600 mA (slow blow) 15 Vout models: 1 600 mA (slow blow) (The need of an external fuse has to be assessed in the final application.) Input Filter Internal Capacitor Output Specifications Voltage Set Accuracy 2% max. Regulation - Input Variation (Vmin - Vmax) 0.2% max. - Load Variation (10 - 100%) 0.6% max. (1.2 & 1.5 Vout models) 0.4% max. (other models) Ripple and Noise 1.2 Vout models: 50 mVp-p typ. (20 MHz Bandwidth) 1.5 Vout models: 50 mVp-p typ. 1.8 Vout models: 50 mVp-p typ. 2.5 Vout models: 50 mVp-p typ. 3.3 Vout models: 50 mVp-p typ. 5 Vout models: 50 mVp-p typ. 6.5 Vout models: 50 mVp-p typ. 9 Vout models: 75 mVp-p typ. 12 Vout models: 75 mVp-p typ. 15 Vout models: 75 mVp-p typ. Capacitive Load 470 F max. Minimum Load Not required Temperature Coefficient 0.015 %/K max. Start-up Overshoot Voltage 1% max. Short Circuit Protection Continuous, Automatic recovery Output Current Limitation 250% typ. of Iout max. Transient Response - Peak Variation 150 mV typ. / 200 mV max. (50% Load Step) - Response Time 250 s typ. / 350 s max. (50% Load Step) EMC Specifications EMI Emissions - Conducted Emissions EN 55032 class A (with external filter) - Radiated Emissions EN 55032 class A (with external filter) External filter proposal: www.tracopower.com/overview/tsr1 All specifications valid at nominal voltage, full load and +25C after warm-up time unless otherwise stated. Page 2 / 3 www.tracopower.com April 27, 2020