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HomeProductsIntegrated Circuits (ICs)PMIC - Voltage Regulators - DC DC Switching RegulatorsRP500K134A-TR
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RP500K134A-TR - Nisshinbo Micro Devices Inc.

Manufacturer Part Number
RP500K134A-TR
Manufacturer
JRC (Nisshinbo Micro Devices)
Allelco Part Number
98D-RP500K134A-TR
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
39,833 pcs available, New & Original
Parts Description
600MA PWM/VFM STEP-DOWN DCDC CON
Package
DFN(PL)1820-6
Data sheet
RP500K134A-TR.pdf

Datasheets

RP500x Series.pdf
RoHs Status
RoHS Compliant
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Our certification
In stock: 39833
  • Unit Price: $0.902
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $0.902 $0.90
200+ $0.35 $70.00
500+ $0.338 $169.00
1000+ $0.331 $331.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

RP500K134A-TR Tech Specifications
Nisshinbo Micro Devices Inc. - RP500K134A-TR technical specifications, attributes, parameters and parts with similar specifications to Nisshinbo Micro Devices Inc. - RP500K134A-TR

Product Attribute Attribute Value
Manufacturer JRC (Nisshinbo Micro Devices)
Voltage - Output (Min/Fixed) 1.3V
Voltage - Output (Max) -
Voltage - Input (Min) 2.55V
Voltage - Input (Max) 5.5V
Topology Buck
Synchronous Rectifier Yes
Supplier Device Package DFN(PL)1820-6
Series RP500x
Package / Case 6-UFDFN Exposed Pad
Product Attribute Attribute Value
Package Tape & Reel (TR)
Output Type Fixed
Output Configuration Positive
Operating Temperature -40°C ~ 85°C (TA)
Number of Outputs 1
Mounting Type Surface Mount
Function Step-Down
Frequency - Switching 1.2MHz
Current - Output 900mA
Base Product Number RP500

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status RoHS Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
ECCN EAR99
HTSUS 8542.39.0001

Frequently Asked Questions(FAQ)

What are the key design constraints when integrating the RP500K134A-TR buck regulator into a 3.3V-powered system requiring a stable 1.3V supply for an FPGA core?
The RP500K134A-TR is suitable for this application only if the input voltage remains within its specified range of 2.55V to 5.5V, which includes 3.3V. However, the minimum dropout voltage must be considered—this device achieves efficient conversion at 1.2MHz switching frequency, but efficiency drops near the lower end of the input range. With a fixed 1.3V output and 900mA peak current capability, the design must ensure that transient loads from the FPGA do not exceed this limit. Additionally, thermal performance in 6-UFDFN package requires adequate PCB copper area for heat dissipation under continuous load, especially if ambient temperatures approach 85°C.
How does the RP500K134A-TR compare to alternative regulators like the TPS62740 or MP1584 for space-constrained battery-powered devices targeting 1.3V rails?
While the TPS62740 also offers 1.3V fixed output, it operates at higher switching frequencies (up to 2.5MHz), enabling smaller inductors and capacitors—beneficial in compact designs. However, the RP500K134A-TR trades off some size for lower quiescent current and synchronous rectification, improving efficiency at light loads. The MP1584 is adjustable and supports wider input ranges but lacks the integrated compensation of the RP500K134A-TR, requiring external components. For fixed 1.3V applications with strict power budgets, the RP500K134A-TR provides optimized integration in its DFN(PL)1820-6 footprint, balancing cost, footprint, and moderate efficiency across 2.55–5.5V inputs.
Can the RP500K134A-TR reliably support inrush current demands during system startup without additional protection circuitry?
No, the RP500K134A-TR does not include built-in soft-start or current-limiting during startup. Its internal control logic allows direct turn-on, which can result in high inrush currents when bulk capacitance is charged rapidly. In systems with large output capacitors (e.g., >100µF), this may stress upstream supplies or violate input current ratings. Engineers should implement external soft-start using RC timing or select capacitors based on allowable dV/dt to limit inrush, ensuring compliance with input source capabilities.
What impact does operating temperature have on the maximum continuous output current of the RP500K134A-TR?
The datasheet specifies a maximum output current of 900mA at 25°C, but derating applies above this temperature. As junction temperature increases due to power dissipation (P = I²R + switching losses), the available current capacity decreases. At 85°C ambient, assuming poor thermal management and no heatsinking, the practical continuous current may drop below 700mA due to internal thermal shutdown mechanisms activating near 150–160°C. Therefore, designers must calculate worst-case power dissipation and verify thermal performance through simulation or empirical testing before committing to full-load operation in harsh environments.
Is the RP500K134A-TR compatible with ceramic input and output capacitors given its 1.2MHz switching frequency?
Yes, the RP500K134A-TR is designed for modern low-ESR ceramic capacitors. Its feedback loop and compensation network are optimized for typical ceramic values in the range of 10µF input and 22–47µF output. However, care must be taken with input capacitor selection: low-ESL types with sufficient RMS current rating are essential to handle peak ripple currents (~0.5A p-p). Output capacitor selection affects transient response—larger values improve regulation under step loads but increase startup time. Ceramics provide excellent stability, but ensure all units are rated for the full operating temperature range (-40°C to 85°C).
How does the synchronous rectification feature in the RP500K134A-TR affect efficiency compared to a non-synchronous solution?
Synchronous rectification replaces the body-diode of a standard MOSFET with a dedicated low-RDS(on) transistor, significantly reducing conduction losses, especially at higher output currents. In the RP500K134A-TR, this results in typical efficiencies of 85–90% when converting from 3.3V to 1.3V at 500mA. A comparable asynchronous design might achieve only 75–80% under similar conditions due to diode forward voltage drop. This improvement becomes more pronounced at higher load levels and reduces thermal stress on the IC, allowing more aggressive layout and reduced need for external heatsinks.
What considerations apply when cascading multiple RP500K134A-TR regulators in a multi-rail system?
Cascading is generally not recommended due to cumulative tolerance stacking and potential instability from interaction between feedback loops. Each RP500K134A-TR has fixed 1.3V output; if one rail powers another, phase margin degradation could occur unless proper isolation and decoupling are implemented. Instead, use a single PMIC with multiple outputs (e.g., RP500K133A for 1.2V) or select regulators with independent control. If necessary, stagger enable signals and ensure each stage has sufficient input filtering to prevent cross-talk, but validate stability through full-system transient testing.
Why might the RP500K134A-TR exhibit audible noise in certain mechanical configurations, despite being a DC-DC converter?
Although switching at 1.2MHz—far above human hearing—audible noise can arise from magnetostriction in the inductor or piezoelectric effects in output capacitors under vibration. Poor PCB layout causing mechanical resonance or inadequate damping may amplify these vibrations. Using shielded inductors and high-stability ceramic capacitors with robust dielectric materials minimizes risk. Also, avoid placing the regulator near plastic enclosures that may resonate sympathetically. In sensitive audio paths or portable devices, consider adding snubber networks or selecting converters with spread-spectrum modulation if available.
How does the Moisture Sensitivity Level (MSL) classification of 1 for the RP500K134A-TR influence manufacturing handling procedures?
MSL 1 indicates unlimited floor life under storage conditions (typically <30°C, <60% RH), meaning the RP500K134A-TR can sit on an assembly line indefinitely without baking prior to reflow. This simplifies inventory management and reduces process steps compared to higher MSL parts. However, operators must still follow standard ESD precautions during handling due to the exposed pad and sensitive CMOS internals. No special pre-conditioning is required before soldering, but final packaging in dry ambient environments is advised to maintain long-term reliability.
What trade-offs exist between using the RP500K134A-TR versus an LDO for generating 1.3V from a 3.3V source?
An LDO would waste (3.3V - 1.3V) × I_load as heat, requiring large packages or heatsinking at high currents. For example, delivering 900mA would dissipate 1.8W—impractical in small form factors. The RP500K134A-TR avoids this by switching, achieving higher efficiency (~90%) and lower thermal burden. However, LDOs offer superior transient response and lack of switching noise, beneficial in analog-sensitive circuits. Choose the RP500K134A-TR when efficiency and thermal budget are priorities; opt for an LDO only where ultra-low noise and simplicity outweigh power loss concerns.
Can the RP500K134A-TR be used in automotive applications requiring AEC-Q100 qualification?
No, the RP500K134A-TR is not listed as AEC-Q100 qualified. It is designed for industrial temperature range (-40°C to 85°C TA), whereas automotive systems often require extended temperature operation (-40°C to +125°C) and rigorous reliability screening. While the part may perform adequately in non-critical automotive infotainment modules, mission-critical systems (e.g., engine control, ADAS) mandate qualified components. Engineers should consult Nisshinbo documentation for any pending qualifications or consider alternative automotive-grade PMICs from TI, ON Semi, or Infineon.
How does the choice of PCB layout affect electromagnetic interference (EMI) performance with the RP500K134A-TR?
Proximity of input/output capacitors, inductor placement, and routing of high-current traces directly influence conducted and radiated EMI. Minimizing loop area between input capacitor, IC, inductor, and output capacitor reduces magnetic field emission. Ground plane continuity under the 6-UFDFN package enhances shielding and stabilizes reference potentials. Avoid running sensitive analog traces parallel to switch nodes. Even with 1.2MHz operation, improper layout can cause harmonics to fall into critical bands (e.g., USB, RF receivers). Use simulation tools or pre-compliance testing to validate emissions, particularly in FCC Class B or EN 55032 environments.
Is it acceptable to operate the RP500K134A-TR near its maximum output current for extended periods without derating?
Continuous operation at 900mA may be feasible under ideal thermal conditions (e.g., FR4 board with 2oz copper, minimal airflow, <50°C ambient), but margins should be included. Power dissipation reaches approximately 0.8–1.0W depending on input voltage and efficiency. Without proper heatsinking, internal temperatures can exceed safe limits, triggering thermal shutdown. For reliability, limit sustained load to 70–80% of max (630–720mA), reserving headroom for transients. Always simulate or prototype under worst-case conditions including cold start-up and variable input voltage.
How does the fixed 1.3V output of the RP500K134A-TR compare to adjustable regulators when prototyping different voltage rails?
Adjustable regulators offer flexibility during development but require external resistors that add cost, footprint, and sensitivity to tolerance variations. The RP500K134A-TR eliminates this complexity for fixed 1.3V applications, providing immediate out-of-the-box functionality. However, if future revisions demand 1.2V or 1.5V operation, replacing the entire regulator may be necessary. For prototyping, engineers might initially use adjustable solutions then migrate to fixed-output parts like the RP500K134A-TR once the final voltage is confirmed, balancing development agility against production optimization.
What role does the exposed pad play in the DFN(PL)1820-6 package of the RP500K134A-TR?
The exposed thermal pad serves dual purposes: electrical connection to ground and primary path for heat dissipation. Soldering it to a solid ground plane via multiple vias transfers heat away from the die, reducing junction-to-ambient thermal resistance. Neglecting this connection forces all heat through wire bonds, increasing temperature rise and risking premature failure. Proper implementation improves reliability and allows higher sustained current delivery. Designers should follow manufacturer-recommended land pattern and stencil apertures to ensure reliable solder joints and thermal interface integrity.
Can the RP500K134A-TR support dynamic voltage scaling by modulating its feedback reference?
No, the RP500K134A-TR has a fixed internal reference set to 1.3V. Dynamic voltage scaling must be achieved externally by controlling the input to a separate digital potentiometer-based circuit or using a microcontroller to adjust another regulator’s feedback. Alternatively, some advanced PMICs integrate digital interfaces for real-time voltage adjustment, but those features are absent here. For adaptive power management, pair the RP500K134A-TR with a host processor that monitors workload and switches between multiple pre-regulated rails rather than attempting to modify this unit’s output dynamically.
How does the switching frequency of 1.2MHz influence component selection for the RP500K134A-TR?
The 1.2MHz frequency enables use of smaller magnetics and capacitors compared to lower-frequency alternatives. Inductor values typically range from 1–4.7µH, allowing compact footprints. Output capacitance needs are reduced because lower ESR requirements allow smaller ceramic values while maintaining ripple specifications. However, higher frequency increases switching losses slightly, affecting efficiency at light loads. Engineers must balance size savings against potential increase in electromagnetic emissions and acoustic noise, selecting components rated for the full operating temperature and current conditions.

Parts with Similar Specifications

The three parts on the right have similar specifications to Nisshinbo Micro Devices Inc. RP500K134A-TR

Product Attribute RP500K184A-TR RP500K114A-TR RP500K154A-TR RP500K194A-TR
Part Number RP500K184A-TR RP500K114A-TR RP500K154A-TR RP500K194A-TR
Manufacturer Nisshinbo Micro Devices Inc. Nisshinbo Micro Devices Inc. Nisshinbo Micro Devices Inc. Nisshinbo Micro Devices Inc.
Voltage - Output (Min/Fixed) - - - -
Output Type - Current - Unbuffered Voltage - Buffered -
Mounting Type - Surface Mount Through Hole Surface Mount
Voltage - Input (Min) - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Series - - - -
Topology - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Frequency - Switching - - - -
Number of Outputs - - - -
Output Configuration - - - -
Voltage - Output (Max) - - - -
Function - - - -
Voltage - Input (Max) - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Base Product Number - DAC34H84 MAX500 ADS62P42
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Synchronous Rectifier - - - -
Current - Output - - - -

RP500K134A-TR Datasheet PDF

Download RP500K134A-TR pdf datasheets and Nisshinbo Micro Devices Inc. documentation for RP500K134A-TR - Nisshinbo Micro Devices Inc..

Datasheets
RP500x Series.pdf
PCN Packaging
Package Name Change 27/Jan/2023.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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RP500K134A-TR Image

RP500K134A-TR

Nisshinbo Micro Devices Inc.
98D-RP500K134A-TR

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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