R1200x SERIES STEP-UP DC/DC CONVERTER FOR OLED BACK LIGHT with SHUTDOWN FUNCTION NO.EA-192-170925 OUTLINE R1200x series are CMOS-based control type step-up DC/DC converter with low supply current ICs. Each of these ICs consists of a Nch MOSFET, NPN transistor, an oscillator, PWM comparator, a voltage reference unit, an error amplifier, a current limit circuit, an under voltage lockout circuit (UVLO), an over voltage protection circuit (OVP), and a soft start circuit. As the external components, an inductor, resistances or capacitors are necessary to make a constant output voltage of step-up DC/DC converter with the R1200x. At standby mode, the NPN transistor can separate the output from the input. During the situation of that, there are two versions. R1200xxxxA: the output of VOUT is generated to 0V by the low resistance (with the auto discharge function). R1200xxxxB does not generate the output of VOUT (without the auto discharge function). The soft-start time (Typ. 1.5ms) and the maximum duty cycle (Typ. 91%) are set internally. For the protection functions of R1200x series are the current limit function of the LX peak current, the OVP function for detection the over voltage of output and the UVLO function for protective miss-operation by the low voltage. (The threshold of OVP is selectable from 17V, 19V or 21V.) Since the packages for these ICs are DFN1616-6, DFN(PLP)1820-6, SOT-23-6 and WLCSP-6-P1, therefore high density mounting of the ICs on boards is possible. FEATURES Supply Current ............................................................. Typ. 500A Standby Current ........................................................... Max. 3A Input Voltage Range .................................................... 2.3V to 5.5V Feedback Voltage ........................................................ 1.0V (Externally adjustable) Feedback Voltage Accuracy......................................... 1.5% Temperature-Drift Coefficient of Feedback Voltage ..... 150ppm/C Oscillator Frequency .................................................... Typ. 1.2MHz Maximum Duty Cycle ................................................... Typ. 91% Switch ON Resistance ................................................. Typ. 1.35 UVLO Detector Threshold ............................................ Typ. 2.0V Soft-start Time .............................................................. Typ. 1.5ms Lx Current Limit Protection .......................................... Typ. 700mA OVP Detector Threshold ........................................... 17V, 19V, 21V Switching Control ......................................................... PWM Built-in a rectifier NPN transistor, at standby mode, complete shutdown is possible. Built-in Auto discharge function.................................... A version Packages ..................................................................... DFN1616-6, DFN(PLP)1820-6, SOT-23-6, WLCSP-6-P1 Ceramic capacitors are recommended ........................ 1F APPLICATION OLED power supply for portable equipment White LED Backlight for portable equipment 1 R1200x NO.EA-192-170925 SELECTION GUIDE The OVP threshold voltage, auto discharge function, and the package for the ICs can be selected at the user s request. Product Name Package Quantity per Reel Pb Free Halogen Free WLCSP-6-P1 5,000 pcs Yes Yes R1200Zxxx-E2-F R1200Lxxx-TR DFN1616-6 5,000 pcs Yes Yes R1200Kxxx-TR DFN(PLP)1820-6 5,000 pcs Yes Yes R1200Nxxx-TR-FE SOT-23-6 3,000 pcs Yes Yes xxx : Designation of OVP detector threshold (001) 17V threshold of OVP (002) 19V threshold of OVP (003) 21V threshold of OVP : The auto discharge function at off state are options as follows. (A) with auto discharge function at off state (B) without auto discharge function at off state 2