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RN5RK Series
8V Input VFM Step-up DCDC Converter

Product Specifications

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.

FEATURES

Input Voltage Range (Maximum Rating) Max. 8.0 V (9.0 V)
Supply Current 1 Typ. 35 µA (RN5RK301x, Switching)
Supply Current 2 Typ. 2 µA (No switching)
Standby Current Typ. 0 µA (CE="L")
Start-up Voltage Max. 0.9 V (xx1 Version)
Max. 0.8 V (xx2 Version)
Output Voltage Range 2.0 V to 5.5 V (Internally fixed) (0.1V steps)
Output Voltage Accuracy ± 2.5%
Oscillator Frequency 100 kHz
Oscillator Maximum Duty Cycle Min. 70%, Typ. 77% (A Version)
Min. 47%, Typ. 55% (B Version)
Efficiency Typ. 85% (RN5RK301B, VIN=2.0V, IOUT=10mA)
Package SOT-23-5

APPLICATION INFORMATION

RN5RKxx1x

L=100µH, CL=47µF

RN5RKxx2A

L=27µH, CL=47µF×2, Rb=300Ω, Cb=0.01µF

TYPICAL CHARACTERISTICS

RN5RK301A
Efficiency vs. Output Current

RN5RK302A
Efficiency vs. Output Current

PIN DESCRIPTION

SOT-23-5

SOT-23-52.9 mm × 2.8 mm
1 CE
2 VOUT
3 NC
4 GND
5 Lx or EXT

RN5RK Series for Consumer

APPLICATIONS

  • Power source for battery-powered equipment
  • Power source for cameras, camcorders, VCRs, and hand-held communication equipment
  • Power source for those appliances which require higher cell voltage than that of batteries

SELECTION GUIDE

The output voltage, the driver type and the duty cycle for the ICs can be selected at the user's request.

Product Name   Package Quantity per Reel
RN5RKxx#$-TR-FE Consumter SOT-23-5 3,000
  • xx … The output voltage can be designed in the range from 2.0V(20) to 5.5V(55) in 0.1V steps.
  • # … Designation of Driver
    1: Internal Lx Tr. Driver
    2: External Tr. Driver
  • $ … Designation of Duty Cycle
    A: 77%
    B: 55%

DOCUMENT/CONTACT

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Package *1 Marking Reliability *2
SOT-23-5 RN5RK RN5RK (-FE)

*1: The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and land pattern (foot pattern).
*2: Reliability file includes a reliability test report and a reflow profile.

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