R1213K Series 2.5 A PWM Step-up DC/DC Converter NO.EA-278-180731 OUTLINE The R1213K is a low supply current PWM step-up DC/DC converter capable of providing an output current up to 2.5 A. Internally, the device consists of an Nch MOSFET driver, an oscillator, a PWM comparator, a voltage reference unit, an error amplifier, a soft-start circuit, an under voltage lockout circuit (UVLO), a thermal shutdown protection circuit, an overcurrent protection circuit and an latch-type protection circuit. The R1213K requires minimal external component count. By simply using an inductor, resistors, capacitors and a diode, a high-efficiency step-up DC/DC converter can be easily configured. The R1213K can adjust the output voltage, the soft-start time, the phase compensation using the external resistors and capacitors. The R1213K has a shutdown control function which can be activated by a protection circuit to turn off the external Pch MOSFET for breaking the current path between the input and output. The R1213K provides an overcurrent protection circuit, a latch-type protection circuit, a thermal shutdown protection circuit and an UVLO circuit. The overcurrent protection circuit limits the LX peak current and a latch- type protection circuit latches the Nch MOSFET off to stop the operation of the DC/DC converter if the output voltage drop due to overcurrent continues more than the protection delay time. The R1213K is offered in a 12-pin DFN(PLP)2730-12 package. FEATURES Input Voltage Range (Maximum Rating) 2.3 V to 5.5 V (6.5 V) Supply Current Typ. 550 A (non-switching) Supply Current Typ. 3 mA (switching) Standby Current Max. 1.5 A (CE = L) Output Voltage Range 3.0 V to 15.0 V, Externally Adjustable (VFB = 0.8 V) Feedback Voltage Accuracy 8 mV Feedback Voltage Temperature Coefficient 50 ppm/C Output Current 1.0 A: VIN = 3.3 V, VOUT = 3.8 V 500 mA: VIN = 2.3 V, VOUT = 5.0 V 250 mA: VIN = 2.7 V, VOUT = 9.6 V 150 mA: VIN = 3.0 V, VOUT = 15 V Nch ON Resistance Typ. 0.07 Shutdown Control Function Activated by the external Pch MOSFET Thermal Shutdown Circuit Activated at 150C (Hys.= 40C) Overcurrent Protection Circuit Activated at Typ. 3.0 A 1 R1213K NO.EA-278-180731 Latch-type Protection Circuit Protection Delay Time: Typ. 32 ms FLAG Output Function Activated at H UVLO Detector Threshold Typ. 2.0 V Oscillator Frequency Typ. 1.0 MHz Maximum Duty Cycle Min. 85%, Typ. 90% Soft-start Time Set by the SS Pin Phase Compensation Set by the AMPOUT Pin Package DFN(PLP)2730-12 APPLICATION Flash LEDs Data Cards DSCs LCD Source Bias Supplies SELECTION GUIDE The R1213K offers users to select the output voltage type matched to their set output voltage. Selecting the matched output voltage type can ensure high-speed transient response and stability. Selection Guide Product Name Package Quantity per Reel Pb Free Halogen Free R1213K001-TR DFN(PLP)2730-12 5,000 pcs Yes Yes : Specify the output voltage type. A: Low Output Voltage Type (VOUT: 3.0 V to 6.0 V) B: High Output Voltage Type (VOUT: 6.0 V to 15 V) 2