Step-down DC/DC Converter

Low voltage Step-down DC/DC Converters Lineup

These products are low voltage step-down DC/DC converters with a synchronous rectifier. These products include an under-voltage lockout circuit (UVLO), a soft-start circuit and a latch type protection circuit. (RP507K doesn't include a latch type protection circuit.)
The products highlighted in pink 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 MODE
pin
Input
Voltage
Range
Output
Voltage
Range
Voltage
Accuracy *1
Frequency Output
Current *2
Thermal
Shutdown
Auto-
Discharge
Package Data
Sheet
(PDF)
Design
Guide
(PDF)
RP500x xx1A PWM/VFM Auto Switching 2.55V to 5.5V 1.1V to 3.3V ±1.5% 1.2MHz 600mA - - WLCSP-6-P2
DFN1616-6
DFN(PLP)1820-6
SOT-23-6W
Download Download
xx2A PWM
xx3A PWM/VFM Auto Switching *
xx4A PWM
RP503x xx1A PWM/VFM Auto Switching  2.5V to 5.5V 0.8V to 2.5V ±1.5% 2MHz 600mA - DFN1616-6
SOT-23-5
Download Download
xx2A *
RP507K 001B PWM/VFM Auto Switching 2.3V to 5.5V Ext. adjustable between
0.7V to 5.5V
±9mV 2MHz 600mA * * DFN(PLP)1616-6D Download Download
RP504x xx1A Forced PWM,
PWM/VFM Auto Switching
* 2.3V to 5.5V
(VOUT ≥1.0V)
0.8V to 3.3V ±1.5% 2.25MHz 600mA - - DFN(PLP)1216-6F
DFN1616-6B
Download Download
xx1B PWM/VFM Auto Switching SOT-23-5
xx1C Forced PWM
xx1D Forced PWM,
PWM/VFM Auto Switching
* * DFN(PLP)1216-6F
DFN1616-6B
new
RP508x
xx1A Forced PWM,
PWM/VFM Auto Switching
* 2.3V to 5.5V 0.8V to 3.3V ±1.5% 6MHz 600mA * - DFN(PLP)1212-6F Download
1.15MB
Download
xx1B *
Product
Name
Version Control MODE
pin
Input
Voltage
Range
Output
Voltage
Range
Voltage
Accuracy *1
Frequency Output
Current *2
Thermal
Shutdown
Auto-
Discharge
Package Data
Sheet
(PDF)
Design
Guide
(PDF)
RP502x xx1B PWM/VFM Auto Switching  2.5V to 5.5V 0.8V to 3.3V ±1.5% 3.3MHz 600mA - WLCSP-6-P2
DFN1616-6
Download
1.19MB
Download
xx2B PWM
xx3B PWM/VFM Auto Switching *
xx4B PWM
R1232D xx1A/B PWM   2.6V to 5.5V 0.9V to 3.3V ±2% 1MHz
(A/C)
2.25MHz
(B/D)  
1A - SON-8 Download
1.30MB
-
001C/D Ext. adjustable between
0.8V to VIN
±16mV
RP501K xx1A PWM,
PWM/VFM Auto Switching
* 2.5V to 5.5V 1.0V to 3.3V ±1.5% 2.25MHz 1A - DFN(PLP)2527-10 Download
1.17MB
Download
xx1B *
RP505K xx1A Forced PWM,
PWM/VFM Auto Switching
* 2.3V to 5.5V
(VOUT ≥0.8V)
0.6V to 3.3V ±1.5% 2.25MHz 1A * - DFN(PLP)2020-8 Download Download
xx1B *
001C 2.3V to 5.5V Ext. adjustable between
0.8V to 3.3V
±9mV -
RP506x xx1A/D Forced PWM,
PWM/VFM Auto Switching
* 2.5V to 5.5V
or
2.5V to 4.5V
0.8V to 3.3V (A/B)
0.6V to 3.3V (D/E)
±1.5% 1.2MHz
(D/E/F)
2.25MHz
(A/B/C)
2A * - DFN(PLP)2527-10 Download
1.85MB
Download
xx1B/E *
001C Ext. adjustable between
0.8V to 4.0V
±9mV -
001F Ext. adjustable between
0.6V to 4.0V

Dual Output

Product
Name
Version Control MODE
pin
Input
Voltage
Range
Output
Voltage
Range
Voltage
Accuracy *1
Frequency Output
Current *2
Thermal
Shutdown
Auto-
Discharge
Package Data
Sheet
(PDF)
Design
Guide
(PDF)
RP550K
Dual
001A Forced PWM,
PWM/VFM Auto Switching
* 2.3V to 5.5V
(VOUT ≥0.8V)
Ext. adjustable between
0.6V to 3.3V
±9mV 2.25MHz 1A x2 * - DFN(PLP)2730-12 Download
1.19MB
Download
  • *1When the output voltage is adjusted by external resistors, the value means the feedback voltage accuracy.
  • *2This is an approximate value, because output current depends on conditions and external parts.

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Technical Info.

  • Application Note

    Technical Information on Ricoh Power Management ICs.

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