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RP400 Series
Current Mode PWM/VFM Step-up DCDC Converter

Product Specifications

The RP400 Series are CMOS-based automatic switch PWM- or VFM-controlled step-up DC/DC converters. RP400 includes a soft start circuit. By simply using an inductor, a capacitor, a diode, and (resistors) as external components, a high-efficiency step-up DC/DC converter can be easily configured. Due to current mode PWM control, the RP400 provides a fast response and high efficiency. Ceramic output capacitors can be used.

The output voltage can be selected from the internally fixed or the externally adjustment. The RP400 has an anti-ringing switch that prevents inductor current from ringing in PWM discontinuous mode. RP400 switches automatically to VFM control in low output current, keeping high efficiency. In addition to SOT-23-5 package, a 1.8mm × 2.0mm square DFN(PLP)1820-6 package is also available.

FEATURES

Input Voltage Range (Maximum Rating) Max. 5.5 V (6.0 V)
Supply Current 1 Typ. 300 μA (VSET=3.0V, Switching)
Supply Current 2 Typ. 160 μA (No switching)
Standby Current Typ. 0.15 μA (CE="L", only A or C Version)
Start-up Voltage 0.8 V (Ver.A), 0.7 V (Ver.B), 1.2 V (Ver.C)
Output Voltage Range 1.8 V to 5.0 V (Internally fixed) (xx1)
Externally adjustable (Feedback voltage : 0.6 V) (001)
Output Voltage Accuracy ±2%
Oscillator Frequency 700 kHz
Oscillator Maximum Duty Cycle Typ. 88%
Coil-current Limit Circuit Current Limit Typ. 600 mA
Soft Start Time Typ. 0.7 ms
Anti-ringing Switch Internal EMI Suppression
Packages DFN(PLP)1820-6, SOT-23-5

APPLICATION INFORMATION

RP400xxx1A
(Internally fixed output Voltage type)

RP400x001A
(Externally adjustable output voltage type)

TYPICAL CHARACTERISTICS

RP400x001A Efficiency vs. Output Current

PIN DESCRIPTION

DFN(PLP)1820-6

DFN(PLP)1820-61.8 mm × 2.0 mm
  Ver.A/C Ver.B
1 VIN VIN
2 CE NC
3 GND GND
4 Lx Lx
5 NC (xx1A/C) NC (xx1B)
VFB (001A/C) VFB (001B)
6 VOUT VOUT

*) The tab is substrate level (GND).

SOT-23-5

SOT-23-52.9 mm × 2.8 mm
  Ver.A/C Ver.B
1 CE NC
2 GND GND
3 VIN VIN
4 VOUT VOUT
5 Lx Lx

RP400 Series for Consumer

APPLICATIONS

  • MP3 Players, PDA
  • Digital Still Cameras
  • LCD Bias Supplies
  • Portable Blood Pressure Meter
  • Wireless Handset
  • GPS

SELECTION GUIDE

In the RP400 Series, Output Voltage, Type of Output Voltage, and package for the ICs can be selected at the user’s request.

Product Name   Package Quantity per Reel
RP400Kxx1# -TR Consumter DFN(PLP)1820-6 5,000
RP400Nyy1#-TR-FE Consumter SOT-23-5 3,000
  • xx … Specify the output voltage within the range of 1.8V (18) to 5.0V (50) in 0.1V steps.
    For the externally adjustable output voltage type (00).
  • yy … Specify the output voltage within the range of 1.8V (18) to 5.0V (50) in 0.1V steps.
    (The externally adjustable output voltage type is not available.)
  • # … Select the CE pin
    A,C: with CE pin
    B: without CE pin

DOCUMENT/CONTACT

Package *1 Marking Reliability *2
DFN(PLP)1820-6 RP400Kxx1A RP400K
RP400Kxx1B
RP400Kxx1C
SOT-23-5 RP400Nxx1A RP400N (-FE)
RP400Nxx1B
RP400Nxx1C

*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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