R-78B3.3-1.5L RECOM POWER

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 Efficiency up to 95%, no heatsinks required Features Pin compatible with LM78XX linears Low profile (L/W/H=11.5 x 8.5 x 17.5mm) DC/DC Converter Wide input range Switching Short circuit protection, thermal shutdown Low ripple and noise Regulator R-78B-1.5(L) L version with 90 pins Description 1.5 Amp The R-78Bxx-1.5 series high efficiency switching regulators are ideally suited to replace 78xx 3 SIP3 linear regulators and are pin compatible. The efficiency of up to 95% means that very little energy is wasted as heat so there is no need for any heat sinks with their additional space and mounting costs. The L-Version with 90 pins allows direct replacement for laid-flat regulators where component height is Single Output at a premium. Low ripple and noise figures and a short circuit input current of typically only 10mA round off the specifications of this versatile converter series. Selection Guide Part Input Output Output Efficiency Number Voltage Range Voltage Current min Vin max. Vin VDC VDC A % % (1) R-78B3.3-1.5 4.75 - 18 3.3 1.5 91 88 (1) R-78B5.0-1.5 6.5 - 18 5.0 1.5 94 92 (1) R-78B6.5-1.5 8.0 - 18 6.5 1.5 95 93 th Selection Guide (NRND, last time buy: 16 Nov 2020) Part Input Output Output Efficiency Number Voltage Range Voltage Current min Vin max. Vin VDC VDC A % % (1) R-78B1.5-1.5 4.75 - 18 1.5 1.5 83 78 (1) R-78B1.8-1.5 4.75 - 18 1.8 1.5 85 81 (1) R-78B2.5-1.5 4.75 - 18 2.5 1.5 88 84 Model Numbering 22++ RoHSRoHS REACHREACH compliantcompliant compliantcompliant 10 from 1010 from 10 R-78B -1.5(L) Output Voltage Pinning EN55032 compliant Output Current IEC/EN60950-1 certified Notes: Note1: add suffix L for 90 bent pins, e.g. R-78B5.0-1.5L PREFERRED ALTERNATIVES Specifications (measured Ta= 25C, 10% minimum load, unless otherwise stated) Please consider these alternatives: BASIC CHARACTERISTICS R-78B-2.0 Series Parameter Condition Min. Typ. Max. Quiescent Current nom. Vin= 12VDC 7mA 9mA Internal Power Dissipation Vout= 1.5VDC 0.65W Internal Operating Frequency nom. Vin= 12VDC 300kHz 340kHz 380kHz (2) Minimum Load 0% (3) Output Ripple and Noise 20MHz BW 15mVp-p 30mVp-p Ref. Back Ripple Current 150mAp-p 200mAp-p Absolute Maximum 1 second start up, no external components 1000F Capacitive Load <1 second start up + diode protection circuit 6800F Notes: Note2: Operation under no load will not harm the converter, but specifications may not be met A minimum load of 10mA is recommended Note3: Output Ripple and Noise is tested from 10% to 100% load continued on next page www.recom-power.com REV.: 5/2020 I-1 O O P P E a C C R R O O Y M M n D D O O U U t C C C C E E y T T R R S SR-78Bxx-1.5(L) DC/DC Converter Series Specifications (measured Ta= 25C, 10% minimum load, unless otherwise stated) Efficiency vs. Vin (full load) Ripple vs. Vin (full load) 50 100 6.5Vout 5Vout 90 45 3.3Vout 40 2.5Vout 80 1.8Vout 35 70 1.5Vout 30 60 25 50 20 40 6.5Vout 5Vout 15 30 3.3Vout 10 2.5Vout 20 1.8Vout 5 10 1.5Vout 0 0 4.75 7 9 11 13 15 17 18 4.75 7 9 11 13 15 17 18 Input Voltage VDC Input Voltage VDC Efficiency vs. Load (max. Vin) Ripple vs. Load (max. Vin) 100 50 6.5Vout 5Vout 90 45 3.3Vout 2.5Vout 80 40 1.8Vout 70 35 1.5Vout 60 30 50 25 40 6.5Vout 20 5Vout 30 15 3.3Vout 2.5Vout 20 10 1.8Vout 10 5 1.5Vout 0 0 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 Output Load % Output Load % Ripple vs. Load (min. Vin) Efficiency vs. Load (min. Vin) 100 50 6.5Vout 5Vout 90 45 3.3, 2.5Vout 1.8, 1.5Vout 80 40 70 35 60 30 50 25 40 20 6.5Vout 5Vout 30 15 3.3Vout 20 10 2.5Vout 1.8Vout 10 5 1.5Vout 0 0 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 Output Load % Output Load % www.recom-power.com REV.: 5/2020 I-2 Efficiency % Efficiency % Efficiency % Ripple mV Ripple mV Ripple mV