C C S S O O R R w E E M M T T P P R R a L L R I I E E A A r V V N N A N N T T r NOT RECOMMENDED FOR NEW DESIGNS TH (LAST TIME BUY: 27 NOV 2020) Designed for 4-20mA loop operation and Features energy scavenging applications Open frame SMD design DC/DC Converter -40C to +105C operating temperature full load Switching Continuous short circuit protection No minimum load required Regulator R420-1.8/PL 5000m operating altitude Description Low The R420 has been designed for auxiliary power from 4-20mA loops and other low power budget 3 Current applications that require a maximum input current <3.6mA. This low profile SMD converter delivers a regulated, short-circuit protected output that can be adjusted between 1.8V and 5V with a single external resistor and delivers three times the output current of equivalent linear regulators to power Regulator microprocessors, data-loggers and HART digital modems without affecting the analog 4-20mA signal. The R420 will also find many applications in energy scavenging and indoor solar powered circuits. Selection Guide Part Input Adjustable Output Output Efficiency Max. Capacitive (1) (2) Number Voltage Range Voltage Range Current typ. Load VDC VDC mA % F R420-1.8/PL 10-36 1.8-5.0 10 76 1000 Notes: 22++ RoHSRoHS REACHREACH compliantcompliant compliantcompliant Note1: Efficiency is tested at 10-36VDC, full load and +25C ambient 10 from 1010 from 10 Note2: Max ca p load is tested at nominal input and full resistive load EN60950-1 certified EN55032 compliant Model Numbering R420-1.8/PL (3) Packaging SEARCHING FOR Notes: ALTERNATIVES Note3: add suffix -R for tape and reel packaging Contact RECOM Ordering Examples: TH (LAST TIME BUY: 27 NOV 2020) NOT RECOMMENDED FOR NEW DESIGNS R420-1.8/PL DC/DC Converter Series Specifications (measured Ta= 25C, full load, nominal input voltage and after warm-up) Ouput Current vs. Input Voltage 1.8Vout, 3.3Vout 10.0 5Vout 5.5 10 15 36 Input Voltage VDC Output Voltage Trimming Radj Radj (kW) Vout Trim Open 1.8V 8 3.3V 3.75 5.0V -Vout REGULATIONS Parameter Condition Value Output Voltage Accuracy 100% load 2.0% typ. Line Voltage Regulation low line to high line, full load 0.2% typ. / 0.5% max. Load Voltage Regulation 10% to 100% load 0.5% typ. / 0.8% max. Transient Response with 100F output capacitor, 100% <-> 50% load 75mV typ. / 100mV max. PROTECTIONS Parameter Condition Value Short Circuit Protection (SCP) continuous, automatic recovery ENVIRONMENTAL Parameter Condition Value Operating Temperature Range without derating (see graph) -40C to +105C Operating Altitude 5000m Operating Humidity non-condensing 95% RH max. Pollution Degree PD2 Vibration 10-55Hz, 2G, 30min along X, Y and Z 3 MIL-HDBK 217F, G.B. +25C 7395 x 10 hours MTBF MIL-HDBK 217F, G.B. +71C 1242 x 10 hours continued on next page www.recom-power.com REV.: 4/2020 I-2 Output Current mA