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Step-down DC/DC Converter Lineup



Part Number Type Control Operating
Voltage
Output
Voltage
Accuracy Frequency Output
Tr.
IOUT *1 Features Packages
[PDF]
Data
Sheet
[PDF]
R1221N PWM PWM/VFM
Auto change
2.3V to 13.2V 1.5V to 5.0V ±2% 300kHz
500kHz
Ext. -   *SOT-23- 6W PDF
(229KB)
R1223N PWM PWM/VFM
Auto change
2.3V to 13.2V 1.5V to 5.0V ±2% 300kHz
500kHz
Ext. -   *SOT-23- 5 PDF
(188KB)
R1224N PWM PWM/VFM
Auto change
2.3V to 18.5V 1.2V to 6.0V ±2% 180kHz
300kHz
500kHz
Ext. - Ext. phase comp.
Reset type protection circuit
*SOT-23- 5 PDF
(400KB)
Ext. adjustable
R1225N PWM PWM/VFM
Auto change
2.3V to 18.5V 1.2V to 6.0V ±2% 180kHz
300kHz
500kHz
Ext. -   *SOT-23- 6W PDF
(264KB)
R1232D PWM   2.6V to 5.5V 0.9V to 3.3V ±2% 1MHz
2.25MHz
Int. 1A Sync. Rectifier
Ext. phase comp.
*SON-8 PDF
(848KB)
Ext. adjustable ±16mV
R1234D   PWM/VFM
Manual change
2.4V to 5.5V 1.2V to 3.3V ±2% 500kHz
800kHz
Int. 500mA Sync. Rectifier
Ext. phase comp.
*SON-8 PDF
(917KB)
Ext. adjustable ±24mV
new
R1240x
PWM   4.5V to 30V Ext. adjustable between 0.8V to 15.0V ±1.5% 1.25MHz Int. 1.2A Built-in Peak current limit,
Built-in Thermal shutdown
Fold-Back type protection circuit *2
*SOT-23- 6W
*DFN(PLP) 2527-10
PDF
(351KB)
RP500x PWM PWM/VFM
Auto change
2.55V to 5.5V 1.1V to 3.3V ±1.5% 1.2MHz Int. 600mA Sync. Rectifier *DFN(PLP) 1820-6
*SOT-23- 6W
*WLCSP- 6-P2
PDF
(473KB)
Part Number Type Control Operating
Voltage
Output
Voltage
Voltage
Accuracy
Frequency Output
Tr.
IOUT *1 Features Packages
[PDF]
Data
Sheet
[PDF]

*1  For internal output transistor: This is an approximate value, because output current depends on conditions and external parts.
*2  The Fold-Back Protection circuit will execute current limitation while lowering operational frequency and continue operation for output short circuits, etc. When abnormal conditions are resolved, operating frequency becomes normal again and normal conditions are resumed.

* For technical terms on the list, please refer to " Application Note ".


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