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RICOH ELECTRONIC DEVICES CO., LTD.

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DCDC Converters for LCD/OLED/CCD

Step-up and Charge Pump Type DCDC Converters

These products are suitable for the power management of LCDs, OLEDs and CCDs.

Product
Name
Control Input Voltage Range Output
Voltage
Range
Switching Frequency Output
Tr.
Lx
Current
Limit*1
Other Features Package Datasheet
R1293 PWM, Step-up 2.2V to 5.5V Up to 16.0V,
Ext. Adjustable
300 kHz to 1000 kHz, Ext. Adjustable Internal 2 A DC/DC output with noise reduction function.
VCOM amplifier 1 channel,
GAMMA amplifier 6 channel.
Thermal
Soft-Start : Ext. Adjustable
Phase : Ext.
Maxduty : Ext. Adjustable
QFN(PLP)0404-32 Consumer
LDO 1.8V to 2.5V Internal IOUT=
350mA
Amplifier 5.0V to 16.0V - - -
R1290 PWM, Step-up 2.0V to 5.5V : 101A
2.5V to 5.5V : 102A
3.3V to 5.5V : 103A
Up to 20.0V,
Ext. Adjustable
180 kHz to 1400 kHz, Ext. Adjustable Internal 2 A The charge pump operates at
1/4th operating frequency.
Soft-Start : Ext. Adjustable
Sequencing UVLO
Phase : Ext.
Maxduty : Ext. Adjustable
QFN0404-24 Consumer
Charge pump,
Positive
Ext. Adjustable -
Charge pump,
Negative
Ext. Adjustable -
NEW
R1294
PWM, Step-up 2.0V to 5.5V : 101A
2.5V to 5.5V : 102A
3.3V to 5.5V : 103A
Up to 20.0V,
Ext. Adjustable
210 kHz to 1400 kHz, Ext. Adjustable
(800 kHz ±8%)
Internal 2 A The charge pump operates at
1/4th operating frequency.
Soft-Start : Ext. Adjustable
Sequencing UVLO
Phase : Ext.
Maxduty : Ext. Adjustable
QFN0404-24B Consumer
Charge pump,
Positive
Ext. Adjustable -
Charge pump,
Negative
Ext. Adjustable -
  • *1Lx current limit is different from output current.

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