R1244N001B-TR-FE

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 components, a high-efficiency step-down DC/DC converter can be easily configured. Due to current mode PWM control, the R1240x/R1244N provide a fast response and high efficiency. Ceramic output capacitors can be used. Two different pin layout of SOT-23-6W package as R1240N and R1244N are available. 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 R1244N : Typ. 85% (Feedback voltage : 0.8V) UVLO Detect Voltage (VUVLO) ···········Typ. 3.8V Soft Start Time (tstart) ...