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R5220 Series
400mA PWM Step-down DCDC Converter with Switch Function

Product Specifications

The R5220 Series are CMOS-based PWM step-down DC/DC converters with synchronous rectifier. R5220 also has the function of switching to the LDO regulator. By switching with the MODE pin, the device can be used as an LDO regulator (Output Current 50mA) in the smaller output current range, while it can be used as a DC/DC converter (Output Current 400mA*) under high load conditions. (The polarity of the MODE pin is selectable.) The DC/DC converter contains an under-voltage lockout circuit (UVLO), a soft start circuit, and a latch type protection circuit. By simply using an inductor and a capacitor, a high-efficiency DC/DC converter can be easily configured.

*) This is an approximate value, because output current depending on conditions and external parts.

FEATURES

Input Voltage Range (Maximum Rating) 2.8 V to 5.5 V (6.5 V)
Supply Current Typ. 350 µA (DC/DC), Typ. 5.0 µA (VR)
Standby Current Typ. 0.1 µA
Built-in Driver ON Resistance P-channel 0.5 Ω, N-channel 0.5 Ω (at VIN=3.6 V)
Output Current Min. 400 mA (DC/DC), Min. 50 mA (VR)
Output Voltage 1.0 V to 3.3 V (0.1V steps)
Output Voltage Accuracy ±2.0% (VOUT≥1.5V), ±30 mV (VOUT<1.5V)
Oscillator Frequency (DC/DC) Typ. 1.2 MHz
UVLO Detect Voltage Typ. 2.35 V
Built-in Soft-start Function Typ. 0.2 ms
Latch-type Protection Function (Delay Time) Typ. 3.0 ms
Coil-current Limit Circuit (DC/DC) Typ. 800 mA
Built-in fold-back protection circuit (VR) Typ. 60 mA
Ceramic Capacitor is recommended. CIN=COUT= 10 µF or more
Package DFN(PLP)2514-6

APPLICATION INFORMATION

TYPICAL CHARACTERISTICS

R5220K181A DC/DC
Efficiency vs. Output Current

PIN DESCRIPTION

DFN(PLP)2514-62.5 mm × 1.4 mm

DFN(PLP)2514-6

1 Lx
2 GND
3 MODE
4 CE
5 VOUT
6 VIN

*) The tab and tab suspension leads on back side are substrate level (GND).


R5220 Series for Consumer

APPLICATIONS

  • Power source for portable equipment such as DSC, DVC, and communication equipment

SELECTION GUIDE

In the R5220 Series, the output voltage, the version and the pin polalities for the ICs can be selected at the user's request.

Product Name   Package Quantity per Reel
R5220Kxx#$-TR Consumter DFN(PLP)2514-6 5,000
  • xx … Output Voltage (VOUT) or serial number.
    The output voltage can be designed in the range from 1.0V(10) to 3.3V(33) in 0.1V steps.
    ( If selected the custum-made product)The output voltage can be designed by Serial numbers.
  • # … 1: Standard (DC/DC output voltage = LDO output voltage)
    2: Custom-made (DC/DC output voltage ≠ LDO output voltage)
  • $ … Designation of chip enable and Mode pin polarities
    A: Mode pin; "H"=DC/DC converter mode, "L"=LDO Mode
    B: Mode pin; "L"=DC/DC converter mode, "H"=LDO Mode

DOCUMENT/CONTACT

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Technical Support

Package *1 Marking Reliability *2
DFN(PLP)2514-6 R5220K R5220K

*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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