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RN5RK Series
8V Input VFM Step-up DC/DC Converter

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Description

The RN5RK Series are low supply current, CMOS-based VFM step-up DC/DC converters. By simply using an inductor, a diode, and a capacitor as external components, a high-efficiency step-up DC/DC converter can be easily configured. RN5RK comes in two versions: xx1 version with an internal output transistor and xx2 version with an external transistor.

Spec

Standard
Input Voltage Range 0.7 V to 8.0 V (9.0 V)
Operating Temperature Range -40°C to 85°C (125°C)
Supply Current Typ. 35 µA
Standby Current Typ. 0 µA
Start-up Voltage Max. 0.9 V (Ver. xx1)
Max. 0.8 V (Ver. xx2)
Output Voltage Range 2.0 V to 5.5 V (0.1 V step)
Output Voltage Accuracy ±2.5%
Oscillator Frequency Typ. 100 kHz
Maximum Duty Cycle Min. 70%, Typ. 77% (Ver. A)
Min. 47%, Typ. 55% (Ver. B)
Package SOT-23-5

Download Datasheet

Protections / Functions

TSD OCP OVP UVLO OVLO Reverse Shutdown Soft Start SSCG PGOOD Auto Discharge Anti-ringing Sequencing Max Duty Ext. Phase LED Adjust

Functional Description

TSD Thermal Shutdown Function
OCP Overcurrent Protection

Note: The function previously labeled as "ILX (LX Current Limit Function)" is now shown as "OCP."
OVP Overvoltage Protection
UVLO Undervoltage Lockout Protection
OVLO Overvoltage Lockout Protection
Reverse Reverse Current Protection Circuit
Shutdown Shutdown Function
Soft Start Soft Start Function
SSCG Spread Spectrum Clock Generator Function
PGOOD Power Good Output
Auto Discharge Auto Discharge Function
Anti-ringing Anti-ringing Switch Function
Sequencing Start-up Sequencing Control
Max Duty Maximum Duty Cycle
Ext. Phase Externally Adjustable Phase Compensation
LED Adjust LED High-speed Dimming Control

Functional Description

TSD Thermal Shutdown Function
OCP Overcurrent Protection

Note: The function previously labeled as "ILX (LX Current Limit Function)" is now shown as "OCP."
OVP Overvoltage Protection
UVLO Undervoltage Lockout Protection
OVLO Overvoltage Lockout Protection
Reverse Reverse Current Protection Circuit
Shutdown Shutdown Function
Soft Start Soft Start Function
SSCG Spread Spectrum Clock Generator Function
PGOOD Power Good Output
Auto Discharge Auto Discharge Function
Anti-ringing Anti-ringing Switch Function
Sequencing Start-up Sequencing Control
Max Duty Maximum Duty Cycle
Ext. Phase Externally Adjustable Phase Compensation
LED Adjust LED High-speed Dimming Control

Search for similar products under conditions below.

Category:DC/DC Switching Regulators

Topology Boost
VIN
min (V)		 0.7
VIN
max (V)		 8.0
VOUT
min (V)		 2.0
VOUT
max (V)		 5.5
ISS
(µA)		 35

Technical Documents

  • RN5RKxx1x Typical Application

    RN5RKxx1x Typical Application

    L=100µH, CL=47µF

  • RN5RKxx2A Typical Application

    RN5RKxx2A Typical Application

    L=27µH, CL=47µF×2, Rb=300Ω, Cb=0.01µF

  • RN5RK301A Efficiency vs. Output Current

    RN5RK301A Efficiency vs. Output Current

  • RN5RK302A Efficiency vs. Output Current

    RN5RK302A Efficiency vs. Output Current

  • Related Links

    • Prime Designer

      Online Design Tool

      Registration to myNISD is required to use some of the functions, such as simulations.

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      • [V]

      • [V]

      • [A]

Quality & Packages

Product Name Compatibility Package Marking Reliability
RN5RKxxxx-TR-FE
  • gradeConsumer
  • plp
 SOT-23-5 RN5RK RN5RK-FE
  • Refer to the datasheets for the details on the product.
  • The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.

FAQ

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Buy / Contact

  • Purchase, Request for samples and documents
    Sales are made through distributors. Please contact your local distributors for any sales-related inquiry such as price.
  • Available from 1 piece!
    Our electronic device products are available through our authorized online distributors.
  • Technical Support
RN5RK Series