Step-down DC/DC Converter

High voltage Step-down DC/DC Converters Lineup

These products are high voltage step-down DC/DC converters. These products include an under-voltage lockout circuit (UVLO), a soft-start circuit and a thermal shutdown circuit.
The products highlighted in purple 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 Version Control Input Voltage Range Output Voltage
Range
VFB Voltage
Accuracy
Frequency Output
Current *1
Protection Circuit Rectifier Package Data
Sheet
(PDF)
Design
Guide
(PDF)
R1240x 00xA PWM 4.5V to 30.0V Ext. adjustable
between
0.8V and 15.0V
±12mV 1.25MHz 1.2A Latch type Diode Rectifier SOT-23-6W*2
DFN(PLP)2527-10
Download Download
00xB Fold-back type
R1244N 001B PWM 4.5V to 30.0V Ext. adjustable
between
0.8V and 15.0V
±12mV 1.25MHz 1.2A Fold-back type Diode Rectifier SOT-23-6W*2 - -
R1245x 00xA/C/E/G PWM 4.5V to 30.0V Ext. adjustable between
0.8V and 27.6V
(A to D)
±8mV 330kHz(A/B)
500kHz(C/D)
1MHz(E/F)
2.4MHz(G/H)
1.2A Latch type Diode Rectifier DFN(PLP)2020-8
SOT-23-6W
HSOP-8E
Download -
00xB/D/F/H Fold-back type
R1243x 001A/C PWM   4.5V to 30.0V Ext. adjustable between
0.8V and 18.0V
±7mV 330kHz(C/D)
1MHz(A/B)
2A Latch type Diode Rectifier DFN(PLP)2527-10
HSOP-8E
Download -
001B/D Fold-back type
R1242S 001A/C/E/G PWM 5.0V to 30.0V Ext. adjustable between
0.8V and 15.0V
±12mV 330kHz(C/D)
500kHz(E/F)
1MHz(G/H)
Ext. adjustable between
330kHz to 1MHz(A/B)
3A Latch type Synchronous Rectifier
(with external low side transistor)
HSOP-8E Download Download
001B/D/F/H Fold-back type
new
R1270S
001A PWM,
PWM/VFM
Auto Switching
3.6V to 34.0V Ext. adjustable between
0.8V and 31.6V
±8mV Ext. adjustable between
300kHz to 2.4MHz
Also can be synchronized externally by PLL.
3A Latch type Diode Rectifier HSOP-18 Download
2.90MB
Download
001B Fold-back type

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

  • *1This is an approximate value, because output current depends on conditions and external parts.
  • *2The pin-layout of R1240N and that of R1244N is upside down.

  • *All PDF files are less than 1MB unless otherwise stated.
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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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