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Multi Power Supply DC/DC Converter

Step-up and Inverting DC/DC Converters

These products are suitable for the power management of LCDs, OLEDs and CCDs. 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.
Product
Name
Control Input Voltage Range Output Voltage Range Voltage
Accuracy*1
Switching
Frequency
(kHz)
Output
Tr. 
Lx Current Limit*2 Protection
Circuit
Type
Timer Latch Delay Time Other Features? Package Data Sheet
(PDF)
Design
Guide
(PDF)
R1280D CH1: PWM, Step-up 2.5V to 5.5V Ext. Adjustable  ±1.5% 200kHz: xxxC,
700kHz: xxxA/B
Internal - Latch 100ms Soft-Start: Ext. Adjustable
UVLO
Phase: Ext., xxxA/C
Phase: Int., xxxB, With stand-by.
SON-10 Download -
CH2: PWM, Inverting
R1283K CH1: PWM, Step-up 2.5V to 5.5V Up to 20.0V,
Ext. Adjustable
 ±1.5% 300kHz: xxxA,
700kHz: xxxB,
1.4MHz: xxxC
Internal 1.5A Latch 50ms Soft-Start UVLO
Discharge: Inverting output only
Sequencing
DFN(PLP)
2730-12
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CH2: PWM, Inverting  Up to VDD-20.0V,
Ext. Adjustable
 ±25mV   1.5A
R1286K CH1: PWM, Step-up 2.5V to 5.5V 4.5V to 5.8V: xxxA/C to G ±0.9% 1.75MHz Internal 1.0A: 0xxx,
1.1A: 1xxx
Latch 16ms: 0xxx/001B,
40ms: 1xxx
Synchro
Soft-Start UVLO
Sequencing Thermal
Discharge
S-Wire: xxxA/C to G, Inverting output can be dynamically changed by S-wire control.
DFN(PLP)
2730-12
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1.53MB
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 4.5V to 5.8V,
Ext. Adjustable: 001B
±15mV
CH2: PWM, Inverting -2.0V to -6.0V: xxxA/C to G ±70mV 1.5A: 0xxx,
1.8A: 1xxx
-2.0V to -6.0V,
Ext. Adjustable: 001B
±25mV
R1287x CH1: Step-up PWM/VFM Auto Switching: xxxB/F,
PWM: xxxC/D/G/H
2.5V to 5.5V 4.5V to 5.8V: xxx ±0.9% 900kHz: xxxB/F,
300kHz: xxxC/G,
1MHz: xxxD/H
Internal 1.1A Latch 30ms Synchro
Soft-Start UVLO
Sequencing Thermal
Discharge

Only WLCSP-12-P1: xxxF/G/H
WLCSP-12-P1
DFN3030-12
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1.48MB
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4.5V to 5.8V, Ext. Adjustable: 001 ±15mV
CH2: Inverting -4.5V to -5.8V: xxx ±1.0% 1.1MHz: xxxB/H,
300kHz: xxxC/G,
1MHz: xxxD/H
1.5A
-4.5V to -6.0V, Ext. Adjustable: 001 ±30mV
  • *1For the externally adjustable output voltage type, this is a feedback voltage accuracy.
  • *2Lx current limit is different from output current.

*

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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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