RP154x Series 300 mA Ultra-small Dual LDO Regulator No. EA-202-210715 OUTLINE The RP154x is a CMOS-based voltage regulator that provides high ripple rejection, low dropout voltage, high output voltage accuracy, and low supply current. Internally, the RP154x consists of a voltage reference unit, an error amplifier, resistors for setting output voltage, a short current limit circuit and a chip enable circuit. The RP154x is available in fixed output voltage options. Besides the low supply current by CMOS, the RP154x offers a low dropout voltage by built-in low ON resistance Tr. as well as an extended battery life by a chip enable function. Compared with the existing CMOS-based regulators, the RP154x is further improved in ripple rejection, line transient response, and load transient response. All these features allow the RP154x to become ideal power sources for hand-held communication equipment. The RP154x is offered in a 6-pin SOT-23-6 package for a single input type and an 8-pin DFN1216-8 package for a dual input type. Both packages are equipped with two LDOs which can achieve high-density mounting. FEATURES Supply Current ..................................................................... Typ. 50 A x 2 (VR1 & VR2) Standby Current ................................................................... Typ. 0.1A x 2 (VR1 & VR2) Input Voltage Range ............................................................. 1.4 V to 5.25 V Output Voltage Range .......................................................... 0.8 V to 3.7 V (0.1 V steps) Output Voltage Accuracy ...................................................... 1.0% (V > 2.0 V, Ta = 25C) SET Temperature-Drift Coefficient of Output Voltage .................. Typ. 80 ppm/C Dropout Voltage ................................................................... Typ. 0.25 V (I = 300 mA, V = 2.5 V) OUT SET Ripple Rejection ................................................................... Typ. 75 dB (f = 1 kHz) Line Regulation .................................................................... Typ. 0.02%/V Packages ............................................................................ DFN1216-8, SOT-23-6 Short-current Limit Circuit .................................................... Typ. 60 mA Overcurrent Protection Circuit Ceramic Capacitor Compatible ............................................ 1.0 A or more APPLICATIONS Power source for portable communication equipment. Power source for electrical appliances such as cameras, VCRs and camcorders. Power source for battery-powered equipment. 1 RP154x No. EA-202-210715 SELECTION GUIDE (1) The set output voltage, the package type and the auto discharge function are user-selectable options. Selection Guide Product Name Package Quantity per Reel Pb Free Halogen Free DFN1216-8 5,000 pcs Yes Yes RP154L0xx-E2 RP154N0xx-TR-FE SOT-23-6 3,000 pcs Yes Yes xx: Specify the combination of set output voltage (VSET) within the range of 0.8 V to 3.7 V in 0.1 V step. : The auto discharge function at off state are options as follows. (A) Auto-discharge function not included, Active-high (B) Auto-discharge function included, Active-high BLOCK DIAGRAMS CE1 VOUT1 Error Amp. R1 1 Vref R2 1 Current Limit VDD GND R1 2 Error Amp. Vref R2 2 Current Limit CE2 VOUT2 RP154NxxxA Block Diagram (1) Auto-discharge function quickly lowers the output voltage to 0 V by releasing the electrical charge accumulated in the external capacitor when the chip enable signal is switched from the active mode to the standby mode. 2