Step-down DC/DC Converter with VD/VR Lineup

* For technical terms on the list, please refer to "Application Note".
Thermal :Thermal shutdown circuit　Dischage :Auto-Discharge function　Shutdown :Shutdown function　Sequence :Power on sequence controllable

Part Number Control Input Voltage Range Output
Voltage
Range		 Accuracy *1 Frequency Output
Tr.		 IOUT*2 UVLO Soft Start Protaction Curcuit  Features Packages Data
Sheet
R5220x PWM 2.8V to 5.5V 1.0V to 3.3V ±2% 1.2MHz Int. 400mA
(at DC/DC)		 * * Latch type Sync. Rectifier.
DC/DC and VR
alternative circuit.		 DFN(PLP)2514-6
SON-6 		Download
50mA
(at VR)
RP901K PWM,
PWM/VFM
Auto change		 4.5V to 5.5V 1.2V to 1.8V
(DC/DC)		 ±2% 1.2MHz Int. 800mA
900mA
(only D）		 * * Reset type Sync. Rectifier.
With VD, VR.
For DVD drive.
Thermal		 DFN(PLP)2527-10 Download
2.5V to 3.3
(VR)		 ±1% 600mA
3.0V to 5.0
(VD)
2.0V to 3.0V
(Only A）
 ±2% -
RP904Z PWM/VFM
Manual change		 2.5V to 5.5V 1.2V to 3.3V
(DC/DC1)		 ±2% 2MHz Int. 1A * * Latch type Sync. Rectifier.
Bypass switch.
Output voltage is
selectablefrom
DC/DC1 or DC/DC		 WLCSP-11-P2 Download
1.0V to 1.5V
(DC/DC2)		 ±30mV
*1 When the output voltage is adjusted by output resistors, the value means the feedback voltage accuracy.
*2 For internal output transistor: This is an approximate value, because output current depends on conditions and external parts.
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