Multi Power Supply DC/DC Converter

Step-up and Inverting

These products are suitable for the power management of LCD, OLED and CCD. Many variations are available such as step-up DC/DC controller, step-up and step-down dual output converter and step-up and positive / negative charge pump triple output converter.
These products include an under-voltage lockout circuit (UVLO), and a latch type protection circuit. The products with a built-in the sequence control circuit option are able to control a start-up sequence and a shutdown sequence.
The products highlighted in blue rows are major products that are shown in the "DC/DC Converters Lineup in order of Input Voltage and Function".
For technical terms on the list, please refer to "Application Note".
Product Name Control Input
Voltage
Range
Output Voltage Range Voltage
Accuracy *1
Frequency Output
Tr.
Lx
Current
Limit*2
Soft
Start
Timer
Latch
Delay
Time
Features, Remarks Package Data Sheet
(PDF)
Design
Guide
(PDF)
R1283K PWM (Step-up) 2.5V to 5.5V Ext. adjustable
up to 20.0V
±1.5% 300kHz
700kHz
1.4MHz
Internal 1.5A * 50ms Discharge (Inverting output only)
Sequence
DFN(PLP)
2730-12
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PWM (Inverting) Ext. adjustable
up to VDD-20.0V
±25mV 1.5A
R1286K 0xxx PWM (Step-up) 2.3V to 5.5V 4.6V to 5.8V ±0.9% 1.75MHz Internal 1A * 16ms Synchronous Rectifier.
Inverting output can be dynamically
changed by single wire control.
Sequence Discharge Thermal
DFN(PLP)
2730-12
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PWM (Inverting) -2.0V to -6.0V ±70mV 1.5A
1xxx PWM (Step-up) 4.6V to 5.8V ±0.9% 1.1A 40ms
PWM (Inverting) -2.0V to -6.0V ±70mV 1.8A
001B PWM (Step-up) Ext. adjustable between
4.6V and 5.8V
±15mV 1A 16ms Synchronous Rectifier.
Sequence Discharge Thermal
PWM (Inverting) Ext. adjustable between
-2.0V and -6.0V
±25mV 1.5A
R1287x xxxB
xxxC
xxxD
(B) PWM/VFM
Auto Switching
(Step-up)
(C/D) PWM (Step-up)
2.5V to 5.5V (xxx)4.5V to 5.8V ±0.9% 900kHz(B)
300kHz(C)
1MHz(D)
Internal 1.1A * 30ms Synchronous Rectifier.
Sequence Discharge Thermal
WLCSP-12-P1
DFN3030-12
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1.43MB
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(001)Ext. adjustable
between
4.5V and 5.8V
±15mV
(B) PWM/VFM
Auto Switching
(Inverting)
(C/D) PWM (Inverting)
(xxx)-4.5V to -5.8V ±1.0% 1.1MHz(B)
300kHz(C)
1MHz(D)
1.5A
(001)Ext. adjustable
between
-4.5V and -6.0V
±30mV
  • *1When the output voltage is adjusted by external resistors, the value means the feedback voltage accuracy.
  • *2Lx current limit is different from output current.

*

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Distributors

Ricoh semiconductor products are available at those dealers.

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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