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Step-up DC/DC Converter

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

For White LEDs

Internal Diode

Product Name Version Control Input Voltage Range Output Voltage Range VFB Voltage Switching
Frequency
Lx Current
Limit*1
OVP Voltage
(Typ.)
Other Features Package Data Sheet
(PDF)
Design
Guide
(PDF)
R1201N 021/023 PWM 1.8V to 5.5V Up to 20V,
Ext.Adjustable
0.2V 1MHz
: 0x1/2
1.2MHz
: 0x3/4
700mA 9.5V UVLO
Soft-Start
LED Adjust
SOT-23-6 DL DL
031/033 14.0V
041/043 18.5V
051/053 20.6V
052/054 1.8V to 4.5V Up to 21V,
Ext.Adjustable
21.6V
R1202x 3xxD PWM 1.8V to 5.5V Up to 22.2V,
Ext.Adjustable
0.2V 1.2MHz 350mA
700mA
14.0V UVLO
Soft-Start
Thermal
Shutdown
LED Adjust
DFN1616-6B
TSOT-23-6
DL
1.08MB
DL
7xxD 23.0V
R1205L 8x1B PWM 1.8V to 5.5V Up to 24.2V,
Ext.Adjustable
0.2V 1.2MHz 350mA
700mA
25.0V UVLO
Soft-Start
Thermal
LED Adjust
DFN1616-6B DL DL
8x1C 0.4V
R1205N
R1207N
8x3B PWM 1.8V to 5.5V Up to 24.2V,
Ext.Adjustable
0.2V 1.2MHz 350mA
700mA
25.0V UVLO
Soft-Start
Thermal
LED Adjust
TSOT-23-6*2 DL DL
R1207N 8x3B PWM 1.8V to 5.5V Up to 24.2V,
Ext.Adjustable
0.2V 1.2MHz 350mA
700mA
25.0V UVLO
Soft-Start
Thermal
LED Adjust
TSOT-23-6*2 DL DL
8x3C 0.4V
R1218N 021A PWM 1.8V to 5.5V Up to 17V,
Ext.Adjustable
0.2V 1.2MHz 700mA 9.5V UVLO
Soft-Start
SOT-23-6 DL DL
031A 14.0V
041A 18.5V
Product Name Version Control Input Voltage Range Output Voltage Range VFB Voltage Switching
Frequency
Lx Current
Limit*1
OVP Voltage
(Typ.)
Other Features Package Data Sheet
(PDF)
Design
Guide
(PDF)
  • *1Lx current limit is different from output current.
  • *2The pin-layout of R1205N and that of R1207N are different by 180 degrees. Also, the pin-layout of R1203N and that of R1206N are different by 180 degrees.

Tap to see the table

External Diode

Product Name Version Control Input Voltage Range Output Voltage Range VFB Voltage Switching
Frequency
Lx Current
Limit*1
OVP Voltage
(Typ.)
Other Features Package Data Sheet
(PDF)
Design
Guide
(PDF)
R1203L 071B PWM 1.8V to 5.5V Up to 28.7V,
Ext.Adjustable
0.2V 1.2MHz 700mA 29.5V UVLO
Soft-Start
LED Adjust
DFN1616-6B DL DL
R1203N
R1206N
071B PWM 1.8V to 5.5V Up to 28.7V,
Ext.Adjustable
0.2V 1.2MHz 700mA 29.5V UVLO
Soft-Start
LED Adjust
SOT-23-6*2 DL DL
R1206N 071B PWM 1.8V to 5.5V Up to 28.7V,
Ext.Adjustable
0.2V 1.2MHz 700mA 29.5V UVLO
Soft-Start
LED Adjust
SOT-23-6*2 DL DL
R1204x 11xA/D PWM 2.3V to 5.5V Up to 40.2V,
Ext.Adjustable
0.2V 1MHz : xxxA
750kHz : xxxD
900mA 23.0V UVLO
Soft-Start
Thermal
LED Adjust
DFN(PLP)
1820-6

TSOT-23-6
DL DL
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
R1218N 052A PWM 1.8V to 5.5V Up to 30V,
Ext.Adjustable
0.2V 1.2MHz 700mA 23.0V UVLO
Soft-Start
SOT-23-6 DL DL
062A 27.5V
072A 31.5V
Product Name Version Control Input Voltage Range Output Voltage Range VFB Voltage Switching
Frequency
Lx Current
Limit*1
OVP Voltage
(Typ.)
Other Features Package Data Sheet
(PDF)
Design
Guide
(PDF)
  • *1Lx current limit is different from output current.
  • *2The pin-layout of R1205N and that of R1207N are different by 180 degrees. Also, the pin-layout of R1203N and that of R1206N are different by 180 degrees.

Tap to see the table

For 2 or 4 Strings of White LEDs

External Diode

Product Name Version Control Input Voltage Range Output Voltage Range LED
Current
(Max.)
LED
Current
Accuracy
Switching
Frequency
Lx Current
Limit*1
OVP Voltage
(Typ.)
Other Features Package Data Sheet
(PDF)
Design
Guide
(PDF)
R1214Z 211A/C PWM/VFM
Auto
Switching
2.7V to 5.5V Up to 29V,
Ext.Adjustable
40mA x2 ±2% :
xxxA/B
±1.5% :
xxxC/D
450kHz 1.9A 35.0V UVLO
Soft-Start
Thermal
LED Adjust
2 strings
WLCSP-9-P1 DL
1.33MB
DL
221A/C 750kHz
211B PWM 450kHz
211D
R1208K 112A/B PWM 2.7V to 22.0V Up to 42V,
Ext.Adjustable
80mA x4 ±3% 750kHz(A)
450kHz(B)
2A 23.0V UVLO
Soft-Start
Thermal
LED Adjust
4 strings
DFN(PLP)
2730-12
DL DL
212A/B 33.0V
312A/B 43.5V
  • *1Lx current limit is different from output current.

Tap to see the table

For PMOLED and General Use

Internal Diode

Product Name Version Control Input Voltage Range Output Voltage Range VFB
Voltage
Switching
Frequency
Lx Current
Limit*1
OVP Voltage
(Typ.)
Other Features Package Data Sheet
(PDF)
Design
Guide
(PDF)
R1200x 001x PWM 2.3V to 5.5V Up to 20V,
Ext.Adjustable
1.0V 1.2MHz 700mA 17.0V UVLO
Soft-Start
Shutdown
Discharge : xx1A
DFN1616-6
DFN(PLP)
1820-6

SOT-23-6
DL DL
002x 19.0V
003x 21.0V
R1202x 3xxA/B PWM 2.3V to 5.5V Up to 22.2V,
Ext.Adjustable
1.0V 1.2MHz 350mA
700mA
14.0V UVLO
Soft-Start
Thermal
Shutdown
Discharge : xx1A
DFN1616-6B
TSOT-23-6
DL
1.08MB
DL
4xxA/B 17.0V
5xxA/B 19.0V
6xxA/B 21.0V
7xxA/B 23.0V
R1205L 8x1A PWM 2.3V to 5.5V Up to 24.2V,
Ext.Adjustable
1.0V 1.2MHz 350mA
700mA
25.0V UVLO
Soft-Start
Thermal
DFN1616-6B DL DL
R1205N
R1207N
8x3A PWM 2.3V to 5.5V Up to 24.2V,
Ext.Adjustable
1.0V 1.2MHz 350mA
700mA
25.0V UVLO
Soft-Start
Thermal
TSOT-23-6*2 DL DL
R1207N 8x3A PWM 2.3V to 5.5V Up to 24.2V,
Ext.Adjustable
1.0V 1.2MHz 350mA
700mA
25.0V UVLO
Soft-Start
Thermal
TSOT-23-6*2 DL DL
  • *1Lx current limit is different from output current.
  • *2The pin-layout of R1205N and that of R1207N are different by 180 degrees. Also, the pin-layout of R1203N and that of R1206N are different by 180 degrees.

Tap to see the table

External Diode

Product Name Version Control Input Voltage Range Output Voltage Range VFB
Voltage
Switching
Frequency
Lx Current
Limit*1
OVP Voltage
(Typ.)
Other Features Package Data Sheet
(PDF)
Design
Guide
(PDF)
R1204x 11xB/C/E/F PWM: xxxB/E
PWM,
PWM/VFM
Auto Switching:
xxxC/F
2.3V to 5.5V Up to 40.2V,
Ext.Adjustable
1.0V 1MHz:
xxxB/C
750kHz:
xxxE/F
900mA 23.0V UVLO
Soft-Start
Thermal
DFN(PLP)
1820-6

TSOT-23-6
DL DL
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 are different by 180 degrees. Also, the pin-layout of R1203N and that of R1206N are different by 180 degrees.

Tap to see the table

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