B78C05-2R0
Non Isolated POL DC/DC Converter, ITE, DIP, 1 Output, 10 W, 5 V, 2 A
- Manufacturer: PULSE ELECTRONICS
- Product type: DC / DC Non Isolated Board Mount Converters - Fixed Output
- SVHC: No SVHC (04-Feb-2026)
- Depth: 11.6mm
- Width: 8.5mm
- Height: 17.5mm
- Product Range: B78C Series
- No. of Outputs: 1 Output
- Output Power Max: 10W
- Output Current Max: 2A
- Output Voltage Nom: 5V
- Input Voltage DC Max: 36V
- Input Voltage DC Min: 6.5V
- DC / DC Converter Type: DIP
- Power Supply Applications: ITE
- DC / DC Converter Mounting: Through Hole
- DC / DC Converter Output Type: Fixed
| Delivery and price | |
|---|---|
| Units per pack | 100 |
| Price | 3.87 € |
| Current stock | 50+ |
| Lead time | 30 days |
## B78CXX-2R0 Series Non-isolated DC-DC Converters **==> picture [45 x 21] intentionally omitted <==** **----- Start of picture text -----**<br> |oN<br>**----- End of picture text -----**<br> ## **Features** - ⚫ Pin-Out Compatible with Lm78xx Linear Regulators - ⚫ High Efficiency - ⚫ Outstanding thermal derating performance - ⚫ Short Circuit Protection - ⚫ Over Current Protection - ⚫ Lead Free Design, RoHS Compliant - ⚫ Designed according to IEC/EN/UL 62368-1 ## **Description** The B78CXX-2R0 Series are non-isolated DC/DC converters suited to replace 2Amp LM78xx linear regulators. Designed with highly efficiency, allow the operating temperature range of these units to be -40°C to +85°C in a 11.6*8.5*17.5mm. Further features include wide 4.75 ~ 36VDC input voltage range, short-circuits protection and over current protection. |Models and Ratings|Models and Ratings|Models and Ratings|Models and Ratings|Models and Ratings|Models and Ratings|Models and Ratings|Models and Ratings| |---|---|---|---|---|---|---|---| |Model Number|Input Voltage Range<br>(VDC)|Output Voltage<br>(VDC)|Output Current (mA)||Efficiency typ. (%)||Capacitive Load<br>max. (µF)| ||||Min. Load|Full Load|Min. Vin|Max. Vin|| |B78C03-2R0|4.75 - 36<br>12V nominal|3.3|0|2000|90|86|1200| |B78C05-2R0|6.5 - 36<br>12V nominal|5|0|2000|93|90|660| |B78C12-2R0|15 - 36<br>24V nominal|12|0|2000|97|93|470| 1 ey PulseElectronics.com 1 V2 (2025.10.22) B78CXX-2R0 Series Non-isolated DC-DC Converters |Input Specifications<br>Input voltage range<br>See Models and Ratings table<br>~~|~~|Input Specifications<br>Input voltage range<br>See Models and Ratings table<br>~~|~~|Input Specifications<br>Input voltage range<br>See Models and Ratings table<br>~~|~~|Input Specifications<br>Input voltage range<br>See Models and Ratings table<br>~~|~~|Input Specifications<br>Input voltage range<br>See Models and Ratings table<br>~~|~~| |---|---|---|---|---| ||Input filter||Capacitor Type|Capacitor Type| ||Input current|At no load|10 mA typ.|10 mA typ.| ||Input reverse polarity||Not allowed|| |Hot swap<br>Not supported<br>Output Specifications<br>Output current<br>2 A max.<br>~~|~~||||| ||Voltage accuracy|At 50% load|±4% max.|±4% max.| ||Minimum load||See Models and Ratings table|See Models and Ratings table| ||Line regulation|At full load|±0.8% max.|±0.8% max.| ||Load regulation|10% load to full load|±1.5% max.|±1.5% max.| ||Ripple and noise|20MHz bandwidth|75 mVp-p max.|75 mVp-p max.| ||Capacitive load||See Models and Ratings table|See Models and Ratings table| ||Over current protection||200% typ. of full load|200% typ. of full load| ||Short circuit protection||Continuous, automatic recovery|Continuous, automatic recovery| ||Transient recovery time|25% load step change (75% - 100% of Io)|25% load step change (75% - 100% of Io)<br>100 μs max.|100 μs max.| |Temperature coefficient<br>±0.02% / °C max.<br>General Specifications<br>Efficiency<br>Nominal Vin and full load<br>See Models and Ratings table<br>~~es~~||||| ||Switching frequency|PWM|410 kHz typ.|| ||Reliability, calculated MTBF|MIL-HDBK-217F, Ground Benign|2 × 106h|| ||Operating ambient temperature|0.33m/s (65 FLM)|-40°C to +85°C|| ||Storage temperature range||-55°C to +125°C|| |Relative humidity<br>95% RH max.<br>Physical Specifications<br>Case material<br>Plastic (UL 94 V-0)<br>~~Ce~~||||| ||Dimensions||11.6 × 8.5 × 17.5 mm|| ||Weight||4 g typ.|| 2 ey PulseElectronics.com 2 V2 (2025.10.22) B78CXX-2R0 Series Non-isolated DC-DC Converters ## **Characteristic Curves** ## Power Derating Curve **==> picture [99 x 12] intentionally omitted <==** **----- Start of picture text -----**<br> 0.33 m/s (65FLM)<br>**----- End of picture text -----**<br> Efficiency vs Output Current B78C03-2R0 B78C05-2R0 **==> picture [5 x 9] intentionally omitted <==** **----- Start of picture text -----**<br> 3<br>**----- End of picture text -----**<br> PulseElectronics.com V2 (2025.10.22) B78CXX-2R0 Series Non-isolated DC-DC Converters ## **Design and feature configurations** ## EMI Filter Input filter components are used to meet emissions requirement for the module. These components should be mounted as close as possible to the module; and all leads should be minimized to decrease EMI noise. |EN55032 Class A|EN55032 Class A|EN55032 Class A|EN55032 Class A| |---|---|---|---| |Models|C1|C9|L1| |B78C03-2R0<br>B78C05-2R0|10µF/50V<br>MLCC|10µF/50V<br>MLCC|PCM090704S-701<br>SMD CMC| |B78C12-2R0|10µF/50V<br>MLCC|10µF/50V<br>MLCC|PCM090704S-102<br>SMD CMC| ## EN55032 Class B |EN55032 Class B|EN55032 Class B|EN55032 Class B|EN55032 Class B|EN55032 Class B|EN55032 Class B|EN55032 Class B| |---|---|---|---|---|---|---| |Models|C1|C2, C3|C4, C5|C6|C7, C8, C9|L1| |B78C03-2R0<br>B78C05-2R0|100µF/50V<br>Aluminum<br>electrolytic solid<br>capacitors|10µF/50V<br>MLCC|-|100µF/50V<br>Aluminum<br>electrolytic solid<br>capacitors|10µF/50V<br>MLCC|PCM090704S-701<br>SMD CMC| |B78C12-2R0|100µF/50V<br>Aluminum<br>electrolytic solid<br>capacitors|100µF/50V<br>Aluminum<br>electrolytic solid<br>capacitors|10uF/50V<br>MLCC|100µF/50V<br>Aluminum<br>electrolytic solid<br>capacitors|10µF/50V<br>MLCC|PCM090704S-102<br>SMD CMC| PulseElectronics.com 4 V2 (2025.10.22) B78CXX-2R0 Series Non-isolated DC-DC Converters ## Typical Application C1=100µF/50V, C2 =47µF/16V MLCC ## **Mechanical** |**Pinout**|**Pinout**| |---|---| |PIN|Function| |1|+Vin| |2|GND| |3|+Vout| Dimensions in mm Tolerances: xx.x ±0.5 Tolerances: x.xx ±0.25 Pins: ±0.10 PulseElectronics.com 5 V2 (2025.10.22) B78CXX-2R0 Series Non-isolated DC-DC Converters ## **Wave Soldering Temperature Curve** ## **Carton Package** ## TUBE = 42PCS INNER CARTON = 40 TUBE = 40*42 = 1680PCS EXPORT CARTON = 2 INNER CARTON = 2*1680 = 3360PCS ## For More Information: Americas-prodinfonetworkamericas@pulseelectronics.com | Europe-comms-Apps-Europe@pulseelectronics.com | Asia-prodinfonetworkapac@pulseelectronics.com Performance warranty of products offered on this datasheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product names mentioned herein may be trademarks or registered trademarks of their respective owners. © Copyright, 2023. Pulse Electronics, Inc. All rights reserved. PulseElectronics.com 6 V2 (2025.10.22)
Updated at April 23, 2026
Pulse Electronics, a YAGEO company, is a global leader in the design and manufacturing of passive electronic components. With a legacy of innovation dating back to 1956, the company provides essential technology for the communications, computing, industrial, transportation, and IoT sectors. Pulse is recognized worldwide for delivering high-performance solutions that power advanced applications, ranging from 5G networks and electric vehicles to data centers and smart grids. The company's extensive product portfolio is heavily anchored in power and networking magnetics. This includes a comprehensive range of power inductors engineered for exceptional efficiency and reliability in demanding environments. To address complex electromagnetic compatibility challenges, Pulse also manufactures highly effective EMC and RFI suppression solutions, such as common mode chokes and filters, alongside specialized toroidal and RF inductors designed to ensure clean power delivery and optimal signal integrity. Beyond traditional magnetics, Pulse excels in the development of advanced wireless and power conversion components. Their connectivity solutions feature a wide array of high-performance RF antennas and single-band chip antennas tailored for modern connected devices. Furthermore, to support sophisticated power architectures, Pulse provides a broad spectrum of transformers—encompassing PCB-mounted designs, current sensing transformers, and precise pulse transformers—equipping engineers with robust, industry-proven components for power isolation and measurement.
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