R-78AA5.0-1.0SMD-R

Non Isolated POL DC/DC Converter, ITE, ITE, Surface Mount DIP, 1 Output, 5 W, 5 V, 1 A

⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.

Manufacturer: RECOM POWER
Product type: DC / DC Non Isolated Board Mount Converters - Fixed Output
SVHC: No SVHC (21-Jan-2025)
Depth: 15.3mm
Width: 9.6mm
Height: 8.8mm
Product Range: R-78AA-1.0 Series
No. of Outputs: 1 Output
Output Power Max: 5W
Output Current Max: 1A
Output Voltage Nom: 5V
Input Voltage DC Max: 18V
Input Voltage DC Min: 6.5V
DC / DC Converter Type: Surface Mount DIP
Power Supply Applications: ITE
DC / DC Converter Mounting: Surface Mount Device
DC / DC Converter Output Type: Fixed, Adjustable

Delivery and price
Units per pack	100
Price	7.74 €
Current stock	200+
Lead time	30 days

Datasheet

• Efficiency up to 94%, no need for heatsinks Features R = • High reflow temperature SMD package **DC/DC Converter** • Adjustable output voltage buck converter Switching • Short circuit protection, thermal shutdown • Remote on/off control Regulator • Very low shutdown current **R-78AA-1.0** ee EE 

## Description 

The R-78AAxx-1.0SMD series are adjustable output non-isolated buck converters that meet the requirements for RoHS 10/10 as well as the reflow soldering temperatures associated with vapor phase soldering, making these high efficiency switching regulators ideally suited to modern pick-and-place mass production. The efficiency of up to 97% means that very little energy is wasted as heat. The additional features of remote on/off control, continuous short circuit protection and adjustable output voltages will find many uses in the battery-powered, industrial, medical and automotive markets. 

## **1.0 Amp SMD Single Output** 

## Selection Guide 

|Part<br>Number|Input<br>Output<br>Vout<br>Output<br>Efficiency<br>Voltage Range<br>Voltage<br>Adjust Range<br>Current @ min Vin<br>@ max. Vin|Input<br>Output<br>Vout<br>Output<br>Efficiency<br>Voltage Range<br>Voltage<br>Adjust Range<br>Current @ min Vin<br>@ max. Vin|
|---|---|---|
||[VDC]<br>[VDC]<br>[VDC]<br>[A]<br>[%]|[%]|
|R-78AA1.5-1.0SMD|R-78AA1.5-1.0SMD<br>4.75 - 18<br>1.5<br>fixed<br>1.0<br>77|73|
|R-78AA1.8-1.0SMD|R-78AA1.8-1.0SMD<br>4.75 - 18<br>1.8<br>1.5 - 3.0<br>1.0<br>82|76|
|R-78AA2.5-1.0SMD|R-78AA2.5-1.0SMD<br>4.75 - 18<br>2.5<br>1.5 - 3.0<br>1.0<br>87|81|
|R-78AA3.3-1.0SMD<br>4.75 - 18<br>3.3<br>3.0 - 5.5<br>1.0<br>90<br>R-78AA5.0-1.0SMD<br>6.5 - 18<br>5.0<br>3.0 - 5.5<br>1.0<br>94<br>Notes:<br>~~Se~~||84<br>89|
|Note1: Input voltage ranges valid for nominal output voltages|||
||Vin must be higher than Vout including adjust range and dropout voltage||



~~ee~~ Model Numbering 

## R-78AA__-1.0SMD-_ 

EN60950-1 certified IEC60950-1 certified 

nom. Output Voltage Packaging[ (2)] Output Current Package 

Notes: 

Note2: add suffix -R for tape & reel packaging 

## Ordering Examples: 

R-78AA5.0-1.0SMD-R = 5.0VDC Output Volage, 1.0A, SMD, tape and reel packaging 

R-78AA2.5-1.0SMD = 2.5VDC Output Volage, 1.0A, SMD, tube 

REV.: 5/2019 

I-1 

**www.recom-power.com** 

**R-78AA-1.0 Series** 

**DC/DC Converter** 

|Specifications(measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)<br>~~ee~~|Specifications(measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)<br>~~ee~~|
|---|---|
|BASIC CHARACTERISTICS||
|Parameter<br>Condition<br>Min.<br>Typ.<br>~~a~~|Max.|
|Quiescent Current<br>Vin= min. to max.<br>5mA<br>7mA<br>~~po~~||
|Internal Power Dissipation<br>0.4W<br>~~a~~||
|Output Voltage Adjustability<br>see calculation<br>~~a~~||
|Minimum Load(2)<br>0%<br>~~pO~~||
|Start-uptime<br>ON/OFF CTRL<br>50ms<br>~~pO~~||
|ON/OFF CTRL<br>DC-DC ON<br>DC-DC OFF<br>Open or 2.8VDC<Vr<5VDC<br>GND or 0VDC<Vr<0.8VDC<br>~~ee~~||
|Input Current of CTRL Pin<br>DC-DC OFF<br>1.8µA<br>~~a~~||
|StandbyCurrent<br>20µA<br>~~a~~|35µA|
|CTRL Thereshold Voltage<br>2.4VDC<br>2.6VDC<br>CTRL Voltage Hysterese<br>250mV<br>Internal Operating Frequency<br>335kHz<br>385kHz<br>~~a~~<br>~~po~~<br>~~a~~|2.8VDC<br>435kHz|
|Output Ripple and Noise<br>20MHz BW<br>20mVp-p<br>Maximum Capacitive Load<br>with normal start-uptime, no external components<br>with <1 second start-uptime + diodeprotection circuit<br>~~a po~~<br>~~Bd~~<br>~~ee ee~~|30mVp-p<br>470µF<br>6800µF|
|Notes:||
|Note3: Operation under no load will not harm the converter, but specifications may not be met.||
|A minimum load of 10mA is recommended||



Output Voltage Adjustability Adjustment Resistor Values 

**==> picture [506 x 377] intentionally omitted <==**

**----- Start of picture text -----**<br>
R1  R2  R3  Vref(V) +VIN +VOUT<br>10K Ω  21K Ω  5.6K Ω  1.23<br>22K Ω  21K Ω  5.6K Ω  1.23 Rdown<br>R1<br>16.9K Ω  10K Ω  5.6K Ω  1.23<br>Controlled IC V<br>30.9K Ω  10K Ω  10K Ω  1.23 adj<br>— a R2 [R3] ’<br>R<br>up<br>Trim down Rdown = R2(R1 + R3) x (Vref - Vo) + Vref x R1R3 GND GND<br>R2Vo - Vref (R1 + R2) Vref<br>R2R3 (Vref - Vo) + Vref R1 (R2 + R3)<br>Trim up Rup =<br>R2 (Vo - Vref) - Vref R1<br>Efficiency vs. Vin (full load) Ripple vs. Vin (full load)<br>100 50 5Vout<br>90 ——— 45 3.3Vout fr<br>2.5Vout<br>80 40 1.8Vout<br>706050 Sectaia ress ears oe Ea 353025 1.5Vout TrTrTr<br>40 ee 20<br>5Vout<br>3020 3.3Vout2.5Vout eea i 1510 eee<br>1.8Vout<br>10 1.5Vout ii 5<br>0 0<br>4.75 7 9 11 13 15 17 18 4.75 7 9 11 13 15 17 18<br>Input Voltage [VDC] Input Voltage [VDC]<br>continued on next page<br>Efficiency [%] Ripple [mV]<br>**----- End of picture text -----**<br>


|R1|R2|R3|Vref(V)(V)V))|
|---|---|---|---|
|1.8V<br>10KΩ<br>2.5V<br>22KΩ<br>3.3V<br>16.9KΩ<br>5.0V<br>30.9KΩ<br>~~—~~|21KΩ<br>21KΩ<br>10KΩ<br>10KΩ|5.6KΩ<br>5.6KΩ<br>5.6KΩ<br>10KΩ|1.23<br>1.23<br>1.23<br>1.23|



REV.:  5/2019 

I-2 

**www.recom-power.com** 

**R-78AA-1.0 Series** 

**DC/DC Converter** 

~~LT~~ Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated) 

**==> picture [471 x 476] intentionally omitted <==**

**----- Start of picture text -----**<br>
Efficiency vs. Load (max. Vin) Ripple vs. Load (max. Vin)<br>100 pot 50 5Vout a ee<br>3.3Vout<br>90 Pt 45 2.5Vout ee<br>80 | ae| tberb e reesteeery 40 1.8Vout pP t ot| || tt<br>1.5Vout<br>70 oe ee 35 pt | | tt<br>60 tort | | | ct ht | 30 Pt tT | | TT Tt<br>50 PT | | tT | TT tT 25 Pt tT | | ET tT |<br>40 Pt | tT tT | TT tT 20 Pt tT | |Pr<br>30 5Vout Pt | tT tT 15 pp [pert]<br>3.3Vout<br>20 2.5Vout Pt 10 | |<br>1.8Vout<br>10 Pt | tT tT 5 ee er a<br>1.5Vout<br>0 PT tt| tT tT| | 0 Pt ee tte | | et<br>0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100<br>Output Load [%] Output Load [%]<br>Efficiency vs. Load  (min. Vin) Ripple vs. Load (min. Vin)<br>100 a a 50 5Vout a<br>3.3Vout<br>90 | Seewhreherie peepee 45 2.5Vout pt | | tt<br>80 ese eee ee 40 1.8Vout pt ft | ft<br>1.5Vout<br>70 Por | | | | Pe 35 pt | | tt<br>60 Pt tt tT tT tT tT tT 30 Pt tT | | ET yt<br>50 Pt | tT tT | rE tT tT 25 Pt tT | | tT tt<br>40 Pt | tT tT | rE tT tT 20 pt tT | | tT Tt tt<br>30 5Vout Pt | tT tT 15 Pt | | tt<br>3.3Vout<br>20 2.5Vout Pt | tT tT 10 | | |<br>10 1.8Vout Pt | tT tT 5 ae<br>1.5Vout<br>0 Pt tT tT tt 0 Pt} tT | ernferenPEfuranEEhiriesesTt ee<br>0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100<br>Output Load [%] Output Load [%]<br>Efficiency [%] Ripple [mV]<br>Ripple [mV]<br>Efficiency [%]<br>**----- End of picture text -----**<br>


REGULATIONS 

**==> picture [522 x 66] intentionally omitted <==**

**----- Start of picture text -----**<br>
|||||
|---|---|---|---|
|Parameter|Condition|Value|
|Output Accuracy|full load|±2.0% typ. / ±3.0% max.|
|Line Regulation|low line to high line, full load|±0.2% typ. / ±0.4% max.|
|Load Regulation|10% to 100% load|±0.7% typ. / ±1.0% max.|
|Transient Response|25mA/µs|100% <-> 50% load|±85mV typ. / ±100mV max.|

**----- End of picture text -----**<br>


REV.:  5/2019 

I-3 

**www.recom-power.com** 

**DC/DC Converter** 

## **R-78AA-1.0** 

> **DC/DC Converter Series** ~~LT~~ Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated) PROTECTIONS Parameter Condition Value ~~es a~~ Short Circuit Protection (SCP) continuous, automati ~~c~~ recovery ~~eS~~ Short Circuit Input Current nom. Vin= 12VDC 120mA max. Optional Diode Protection Circuit Optional Protection 1: Optiona ~~l Protection 2:~~ Add a blocking diode to Vout if current can flow backwards into +Vin +Vin R-78AAxx +Vout +Vout the output, as this can damage the converter when it is powered down. +Vin +Vin R-78AAxx-1.0SMD +Vout +Vout CTRL-1.0SMDGND Vadj CTRL GND The diode can either be fitted Trim output voltage across the device if the source is CTRL CTRL up 1 diode drop low impedance or fitted in series GND GND GND GND with the output (recommended). ~~ss~~ ENVIRONMENTAL ~~Cn~~ Parameter Condition Value ~~a ee~~ Operating Temperature Range with derating (see graph) -40°C to +85°C ~~a~~ Maximum Case Temperature +100°C ~~a~~ Temperature Coefficient ±0.015%/°C ~~a~~ Thermal Impedance 0.1m/s, horizontal 70°C/W ~~ee~~ Operating Altitude 2000m ~~ee~~ Operating Humidity non-condensing 5% - 95% RH max. ~~ee~~ Pollution Degree PD2 +25°C 13338 - 21070 x 10[3] hours MTBF according to MIL-HDBK-217F, G.B. ~~a es ee~~ + 71°C 3880 - 6769 x 10[3] hours Derating Graph 100 90 ~~SeGRS00008 Wenn~~ 80 ~~SeSSe0000\ cen~~ 70 ~~PERERA~~ 

> 60 ~~PE TTT TET ET TAY TT~~ 

> 50 ~~CEEEEEE Err ae~~ 40 ~~SERRE~~ 30 CEEEE ~~Eee~~ 20 ~~PEPER Err~~ 10 ~~Peer Eee~~ SeSSS0008000110 0 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 85 Ambient Temperature [°C] 

REV.:  5/2019 

I-4 

**www.recom-power.com** 

## **R-78AA-1.0** 

## **DC/DC Converter** 

## **Series** 

Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated) 

|SAFETY AND CERTIFICATIONS|SAFETY AND CERTIFICATIONS|SAFETY AND CERTIFICATIONS|
|---|---|---|
|Certificate Type(Safety)|Report / File Number|Standard|
|Information Technology Equipment, General Requirements for Safety|1603123|IEC60950-1:2005, 2nd Edition + AM 2:2013<br>EN60950-1:2006 + AM 2:2013|
|EAC|RU-AT.49.09571|TP TC 004/2011 TP TC 004/2011|
|RoHS 2+||RoHS 2011/65/EU + AM2015/863|
||||
|EMC Compliance|Condition|Standard / Criterion|
|Electromagnetic compatibility of multimedia equipment -<br>Emission requirements|with external filter|EN55032, Class B|
|ESD Electrostatic discharge immunitytest|Air ±8kV; Contact ±4kV|EN61000-4-2|
|Radiated, radio-frequency, electromagnetic field immunitytest|3V/m|EN61000-4-3|



DIMENSION AND PHYSICAL CHARACTERISTICS 

Parameter Type Value case non-conductive black plastic, (UL94 V-2) Material PCB FR4, (UL94 V-1) ~~a~~ Dimension (LxWxH) 15.3 x 9.6 x 8.8mm Weight 1.7g typ. Dimension Drawing (mm) 15.3 Pinning information ~~Co~~ Pin # Single 15.0 9.4 1,2 +Vin 3,7,8,9 GND 4,5 +Vout 6 Vadj 10 CTRL 0.50[±0.05] ~~eel~~ CU Tolerance: xx.x= 0.5mm 2.54 x 4 Recommended Footprint Details xx.xx= ±0.25mm 10 9 8 7 6 1 2 3 4 5 Bottom View Top View 10 9 8 7 6 1 2 3 4 5 2.54 1.30 1.20 

REV.:  5/2019 

I-5 

**www.recom-power.com** 

**R-78AA-1.0 Series** 

**DC/DC Converter** 

|PACKAGING INFORMATION|PACKAGING INFORMATION|PACKAGING INFORMATION|
|---|---|---|
|Parameter|Type|Value|
|Packaging Dimension (LxWxH)|tube<br>tape and reel(carton)|530.0 x 17.0 x 13.0mm<br>355.0 x 342.0 x 36.0mm|
|Packaging Quantity|tube<br>tape and reel|33pcs<br>250pcs|
|Tape Width||24mm|
|Storage Temperature Range||-55°C to +125°C|
|Storage Humidity||95% RH max.|



The product information and specifications may be subject to changes even without prior written notice.The product has been designed for various applications; its suitability lies in the responsibility of each customer. The products are not authorized for use in safety-critical applications without RECOM’s explicit written consent. A safety-critical application is an application where a failure may reasonably be expected to endanger or cause loss of life, inflict bodily harm or damage property. The applicant shall indemnify and hold harmless RECOM, its affiliated companies and its representatives against any damage claims in connection with the unauthorized use of RECOM products in such safety-critical applications. 

REV.:  5/2019 

I-6 

**www.recom-power.com**

Updated at April 23, 2026

RECOM Power is a globally recognized manufacturer specializing in standard and customized power conversion solutions. Headquartered in Austria with state-of-the-art research and development facilities, the company has built a strong reputation for innovation and reliability. Operating from ISO 9001 and IATF 16949 certified manufacturing sites, RECOM delivers premium power supplies engineered for demanding applications across IoT, Industry 4.0, medical technology, and transportation. The core of our RECOM Power portfolio is dedicated to advanced power and line protection, featuring an extensive selection of high-performance AC/DC converters. These modules are designed to provide efficient, stable power distribution for a wide array of industrial and commercial electronics. In addition to general-purpose power supplies, we offer a robust range of AC/DC LED power supplies specifically optimized to meet the stringent efficiency and lifespan requirements of modern lighting systems. To support comprehensive power architecture design, our selection also includes highly efficient DC/DC converters ideal for precise voltage regulation in complex circuits. Furthermore, we provide specialized passive components such as RECOM power inductors, ensuring engineers have access to the critical, high-quality components required to develop resilient and optimized power delivery systems.

About Novapart

Novapart is a B2B electronic component broker specialising in stock shortages and cost reduction. We source hard-to-find parts and identify compliant alternatives across a catalogue of 410,000+ components from 500+ manufacturers.

Learn more →

Stock Shortage Specialist

When a component is unavailable, discontinued or has an unacceptable lead time, we tap into our network of vetted European and Asian distributors to source what you need — without compromising on quality or traceability.

Request a quote →

Compliant Alternatives

We identify pin-to-pin, electrically equivalent substitutes that meet the same certifications (RoHS, AEC-Q100, REACH) as your original specification — validated against datasheets, not just part numbers. Often at a lower cost.

BOM Analysis service →