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Step-down DC/DC Converter (High voltage)

Product
Name
Version Control Input
Voltage
Range
Output Voltage
Range
VFB
Voltage
Accuracy
Switching
Frequency
Output
Current
*1
Protection
Circuit Type
Other Features? Package Data
Sheet
(PDF)
Design
Guide
(PDF)
R1240x 00xA  PWM   4.5V to 30.0V 0.8V to 15.0V,
Ext. Adjustable
±12mV 1.25MHz 1.2A Latch Diode
UVLO
Soft-Start
Thermal
SOT-23-6W*2
DFN(PLP)
2527-10
Download Download
00xB Fold-back
R1244N 001B  PWM   4.5V to 30.0V 0.8V to 15.0V,
Ext. Adjustable
±12mV 1.25MHz 1.2A Fold-back Diode
UVLO
Soft-Start
Thermal
SOT-23-6W*2 - -
R1245x 00xA/C/E/G PWM   4.5V to 30.0V 0.8V to 27.6V,
Ext. Adjustable
±8mV 330kHz: xxxA/B,
500kHz: xxxC/D,
1MHz: xxxE/F,
2.4MHz: xxxG/H
1.2A Latch Diode
UVLO
Soft-Start
Thermal
DFN(PLP)
2020-8

SOT-23-6W*2
HSOP-8E
Download -
00xB/D/F/H Fold-back
R1243x 001A/C PWM   4.5V to 30.0V 0.8V to 18.0V,
Ext. Adjustable
 ±7mV 330kHz: xxxC/D,
1MHz: xxxA/B/E 
2A Latch Diode
UVLO
Soft-Start
Thermal
DFN(PLP)
2020-8

DFN(PLP)
2527-10
Download -
001B/D Fold-back
001E Latch HSOP-8E
R1242S 001A/C/E/G PWM   5.0V to 30.0V 0.8V to 15.0V,
Ext. Adjustable
±12mV 330kHz: xxxC/D,
500kHz: xxxE/F,
1MHz: xxxG/H,
330kHz to 1MHz: xxxA/B,
Ext. Adjustable
3A Latch Synchro: with external low side transistor
UVLO
Soft-Start
Thermal
HSOP-8E Download Download
001B/D/F/H Fold-back
R1270S 001A PWM,
PWM/VFM
Auto-Switching
3.6V to 34.0V 0.8V to 31.6V,
Ext. Adjustable
±8mV 300kHz to 2.4MHz:
Ext. Adjustable,
Ext. Synchronizable
with PLL Circuit
3A Fold-back
Latch
Diode
UVLO
Soft-Start
Thermal
HSOP-18 Download
2.92MB
Download
001B Fold-back

* : Products partially available for applications under a high temperature environment. For details, please refer to each product page or High Temperature Products.

  • *1Output Current (IOUT) can be affected by environmental conditions or external components. This is an approximate value.
  • *2The pin-layout of R1240N and that of R1244N is upside down.

*

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Technical Info.

  • Application Note

    Technical Information on Ricoh Power Management ICs.

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  • Product Catalog

    Selection guide is available for download in PDF format.

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