R1240xR1224N Overview
R1240x/R1244N Series 1.2A∗ 30V Input PWM Step-down DC/DC Converter The R1240x/R1244N Series are 30V input, CMOS-based PWM step-down DC/DC converters featuring 1.2A∗ output current. R1240x/R1244N include a soft start circuit and a latch or a fold-back protection circuit. (R1244N includes a fold-back Protection Circuit only.) By simply using an inductor, resistors, a diode, and capacitors as external ponents, a...
R1240xR1224N Key Features
- Supply Current (IDD) -------------------------------------- Typ. 500μA (No switching)
- Standby Current (Istandby) ------------------------------- Max. 5μA (CE="L")
- Input Voltage Range (VIN) ----------------------------- 4.5V to 30.0V
- Output Voltage Range (VOUT)------------------------ 0.8V to 15.0V (Externally adjustable)
- Feedback Voltage Accuracy ------------------------- ± 12mV
- Output Current (IOUT)------------------------------------- 1.2A∗
- Oscillator Frequency (fosc)----------------------------- 1.25MHz
- Oscillator Maximum Duty Cycle (Maxduty)--- R1240x : Min. 75%, Typ. 85%
- Minimum ON Time (tMIN) ------------------------------- Typ.100ns
- UVLO Detect Voltage (VUVLO) -----------Typ. 3.8V