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Step-down DCDC Converter (High voltage)

Product Name Control Input Voltage Range Output Voltage Range VFB Voltage Accuracy Switching Frequency Output Current *1 Protection Circuit Other Features Package Datasheet
R1240 PWM 4.5V to 30.0V 0.8V to 15.0V,
Ext. Adjustable
±12mV 1.25MHz 1.2A Latch,
Fold-back
DiodeUVLO
Soft-StartThermal
SOT-23-6W*2
DFN(PLP)2527-10
Consumer
Design guide
R1244 PWM 4.5V to 30.0V 0.8V to 15.0V,
Ext. Adjustable
±12mV 1.25MHz 1.2A Fold-back DiodeUVLO
Soft-StartThermal
SOT-23-6W*2 -
R1245
*
PWM 4.5V to 30.0V 0.8V to 27.6V,
Ext. Adjustable
±8mV 330kHz,
500kHz,
1MHz,
2.4MHz
1.2A Latch,
Fold-back
DiodeUVLO
Soft-StartThermal
DFN(PLP)2020-8
SOT-23-6W*2
HSOP-8E
Consumer
R1243 PWM 4.5V to 30.0V 0.8V to 18.0V,
Ext. Adjustable
±7mV 330kHz,
1MHz
2A Latch,
Fold-back
DiodeUVLO
Soft-StartThermal
DFN(PLP)2020-8
DFN(PLP)2527-10
HSOP-8E
Consumer
R1242 PWM 5.0V to 30.0V 0.8V to 15.0V,
Ext. Adjustable
±12mV 330kHz,
500kHz,
1MHz,
330kHz to 1MHz:
Ext. Adjustable
3A Latch,
Fold-back
Synchro: with external low side transistor
UVLOSoft-Start
Thermal
HSOP-8E Consumer
Design guide
R1270
*
PWM,
PWM/VFM
Auto-Switching
3.6V to 34.0V 0.8V to 31.6V,
Ext. Adjustable
±8mV 300kHz to 2.4MHz:
Ext. Adjustable,
Ext. Synchronizable with PLL Circuit
3A Latch,
Fold-back
DiodeUVLO
Soft-StartThermal
HSOP-18 Consumer
Design guide
R1272
*
Forced PWM,
PWM/VFM
Auto-Switching
4.0V to 34.0V 0.7V to 5.3V,
Ext. Adjustable
±1% 250kHz to 1MHz:
Ext. Adjustable,
Ext. Synchronizable with PLL Circuit
Ext. Latch, Hiccup SynchroSSCG
PG UVLO
Soft-Start: Ext. Adjustable
Thermal OVP
HSOP-18 Consumer
  • *: Products partially available for applications under a high temperature environment. For details, please refer to each product page or High Temperature Products.
  • *1Output Current (IOUT) can be affected by environmental conditions or external components. This is an approximate value.
  • *2The pin-layout of R1240N and that of R1244N is upside down.

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