Step-up DC/DC Converter

Step-up DC/DC Converters Lineup (For white LED/ For PMOLED and General use)

These products are PWM step-up DC/DC converters, which are optimized to drive a white LEDs for background illumination or passive matrix OLED display with constant current. These products include an under-voltage lockout circuit (UVLO), and a soft-start circuit. These are also able to be used in a general step-up power supply.
The products highlighted in yellow rows are major products that are shown in the "DC/DC Converters Lineup in order of Input Voltage and Function".
Succeeding products are available for products highlighted in grey rows. We recommend the products shown in "Product Name".⇒Rxxxx
For technical terms on the list, please refer to "Application Note".

For White LED

Diode Product Name Version Control Input Voltage Range Output Voltage Range VFB Voltage VFB Voltage
Accuracy
Frequency Lx Current
Limit*1
OVP Voltage
(Typ.)
Thermal
Shutdown
Shutdown High- speed Dimming Package Data Sheet
(PDF)
Design
Guide
(PDF)
Internal R1201N 021/023 PWM 1.8V to 5.5V Ext. adjustable
(up to 20V)
0.2V ±10mV 1MHz
(0x1/2)
1.2MHz
(0x3/4)
700mA  9.5V - - * SOT-23-6 Download Download
031/033 14.0V
041/043 18.5V
051/053 20.6V
052/054 1.8V to 4.5V Ext. adjustable
(up to 21V)
21.6V
R1202x 3xxD PWM 1.8V to 5.5V Ext. adjustable
(up to 22.2V)
0.2V ±10mV 1.2MHz 350mA
700mA
14.0V * * * DFN1616-6B
TSOT-23-6
Download Download
7xxD 23.0V
R1205L 8x1B PWM 1.8V to 5.5V Ext. adjustable
(up to 24.2V)
0.2V ±10mV 1.2MHz 350mA
700mA
25.0V * - * DFN1616-6B Download Download
8x1C 0.4V
R1205N
R1207N
8x3B PWM 1.8V to 5.5V Ext. adjustable
(up to 24.2V)
0.2V ±10mV 1.2MHz 350mA
700mA
25.0V * - * TSOT-23-6*2 Download Download
R1207N 8x3B PWM 1.8V to 5.5V Ext. adjustable
(up to 24.2V)
0.2V ±10mV 1.2MHz 350mA
700mA
25.0V * - * TSOT-23-6*2 Download Download
8x3C 0.4V
R1218x 021A PWM 1.8V to 5.5V Ext. adjustable
(up to 17V)
0.2V ±10mV 1.2MHz 700mA 9.5V - - - DFN(PLP)
1820-6

SOT-23-6
Download Download
031A 14.0V
041A 18.5V
External R1203L 071B PWM 1.8V to 5.5V Ext. adjustable
(up to 28.7V)
0.2V ±10mV 1.2MHz 700mA 29.5V - - * DFN1616-6B Download Download
R1203N
R1206N
071B PWM 1.8V to 5.5V Ext. adjustable
(up to 28.7V)
0.2V ±10mV 1.2MHz 700mA 29.5V - - * SOT-23-6*2 Download Download
R1206N 071B PWM 1.8V to 5.5V Ext. adjustable
(up to 28.7V)
0.2V ±10mV 1.2MHz 700mA 29.5V - - * SOT-23-6*2 Download Download
R1204x 11xA/D PWM 2.3V to 5.5V Ext. adjustable
(up to 40.2V)
0.2V ±10mV 1MHz(A)
750kHz(D)
900mA 23.0V * - * DFN(PLP)
1820-6

TSOT-23-6
Download Download
21xA/D 33.0V
31xA/D 42.0V
11xG/H 0.4V 1MHz(G)
750kHz(H)
23.0V
21xG/H 33.0V
31xG/H 42.0V
R1218x 052A PWM 1.8V to 5.5V Ext. adjustable
(up to 30V)
0.2V ±10mV 1.2MHz  700mA 23.0V - - - DFN(PLP)
1820-6

SOT-23-6
Download Download
062A 27.5V
072A 31.5V
Diode Product Name Version Control Input Voltage Range Output Voltage Range VFB Voltage VFB Voltage
Accuracy
Frequency Lx Current
Limit*1
OVP Voltage
(Typ.)
Thermal
Shutdown
Shutdown High- speed Dimming Package Data Sheet
(PDF)
Design
Guide
(PDF)
  • *1Lx current limit is different from output current.
  • *2The pin-layout of R1205N and that of R1207N is upside down. The pin-layout of R1203N and that of R1206N is upside down.

For White LED (4 strings)

Diode Product Name Version Control Input Voltage Range Output Voltage Range LED
Current
(Max.)
LED
Current
Accuracy
Frequency Lx Current
Limit*1
OVP Voltage
(Typ.)
Thermal
Shutdown
Shutdown High- speed Dimming Package Data Sheet
(PDF)
Design
Guide
(PDF)
External new
R1208K
112A/B PWM 2.7V to 22.0V Ext. adjustable
(up to 42V)
80mA x4
(4 strings)
±3% 750kHz(A)
450kHz(B)
2A 23.0V * - * DFN(PLP)
2730-12
Download -
212A/B 33.0V
312A/B 43.5V
  • *1Lx current limit is different from output current.

For PMOLED and General Use

Diode Product Name Version Control Input Voltage Range Output Voltage Range VFB
Voltage
VFB Voltage
Accuracy
Frequency Lx Current
Limit*1
 OVP Voltage
(Typ.)
Thermal
Shutdown
Shutdown Auto-
Discharge
Package Data Sheet
(PDF)
Design
Guide
(PDF)
Internal R1200x 001x PWM 2.3V to 5.5V Ext. adjustable
(up to 20V)
1.0V ±15mV 1.2MHz 700mA 17.0V - * (A)*
(B)-
DFN1616-6
DFN(PLP)
1820-6

SOT-23-6
Download Download
002x 19.0V
003x 21.0V
R1202x 3xxA/B PWM 2.3V to 5.5V Ext. adjustable
(up to 22.2V)
1.0V ±15mV 1.2MHz 350mA
700mA
14.0V * * (A)*
(B)-
DFN1616-6B
TSOT-23-6
Download Download
4xxA/B 17.0V
5xxA/B 19.0V
6xxA/B 21.0V
7xxA/B 23.0V
R1205x 8xxA PWM 2.3V to 5.5V Ext. adjustable
(up to 24.2V)
1.0V ±15mV 1.2MHz 350mA
700mA
25.0V * - - DFN1616-6B Download Download
R1205N
R1207N
8xxA PWM 2.3V to 5.5V Ext. adjustable
(up to 24.2V)
1.0V ±15mV 1.2MHz 350mA
700mA
25.0V * - - TSOT-23-6*2 Download Download
R1207N 8x3A PWM 2.3V to 5.5V Ext. adjustable
(up to 24.2V)
1.0V ±15mV 1.2MHz 350mA
700mA
25.0V * - - TSOT-23-6*2 Download Download
External R1204x 11xB/C/E/F PWM(B/E)
PWM,
PWM/VFM
Auto Switching
(C/F)
2.3V to 5.5V Ext. adjustable
(up to 40.2V)
1.0V ±15mV 1MHz
(B/C)
750kHz
(E/F)
900mA 23.0V * - - DFN(PLP)
1820-6

TSOT-23-6
Download Download
21xB/C/E/F 33.0V
31xB/C/E/F 42.0V
  • *1Lx current limit is different from output current.
  • *2The pin-layout of R1205N and that of R1207N is upside down.
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Technical Info.

  • Application Note

    Technical Information on Ricoh Power Management ICs.

Product Catalog

  • Product Catalog

    Selection guide is available for download in PDF format.

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