Global

Step-down DC/DC Converter

Lineup in order of Input Voltage and Function
Step-up
Step-down
Multi Power Supply
For LCD/OLED/CCD

Middle voltage Step-down DC/DC Controllers Lineup

These products are middle voltage step-down DC/DC controllers with an external output transistor. These products include a soft-start circuit and an undervoltage lockout circuit (UVLO). (R1223N doesn't include a UVLO.)
The products highlighted in green 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	Voltage Accuracy ^*1	Frequency	Output Tr.	Output Current	Protection Circuit	Package
R1223N	xx2A/B	PWM/VFM Auto switching	2.3V to 13.2V	1.5V to 5.0V	±2%	300kHz (A/C/E/G) 500kHz (B/D/F/H)	External	Depends on external MOSFET.	Latch type	SOT-23-5
	xx2C/D	PWM							Latch type
	xx2E/F	PWM/VFM Auto switching							Reset type
	xx2G/H	PWM							Reset type
R1224N	xx2E/F/L	PWM/VFM Auto switching	2.3V to 18.5V	1.2V to 6.0V	±2%	180kHz(L/M) 300kHz(E/G) 500kHz(F/H)	External	Depends on external MOSFET.	Reset type	SOT-23-5
	xx2G/H/M	PWM		1.2V to 6.0V
	102G/H/M	PWM		Ext. adjustable between 1.0V to VIN
R1225N	xx2C/D/K	PWM	2.3V to 18.5V	1.2V to 6.0V	±2%	180kHz(J/K) 300kHz(A/C) 500kHz(B/D)	External	Depends on external MOSFET.	Latch type	SOT-23-6W
R1225N	xx2A/B/J	PWM/VFM Auto switching	2.3V to 18.5V	1.2V to 6.0V	±2%	180kHz(J/K) 300kHz(A/C) 500kHz(B/D)	External	Depends on external MOSFET.	Latch type	SOT-23-6W