*RP105Q (SC-88A) is the discontinued product as of April, 2018. RP105x Series Low Voltage 400 mA LDO Regulator No. EA-179-180419 OUTLINE The RP105x is a 400 mA output type CMOS-based voltage regulator with capability of low input voltage (Min. 0.9 V) and low output voltage (Min. 0.6 V). This device is remarkably improved the performance at low input voltage compared with conventional low voltage LDOs, and two power supply voltage type. (Another power source, VBIAS pin voltage must be Min. 2.4 V). The device consists of a voltage reference unit, an error amplifier, resistor-net for voltage setting, a current limit circuit to avoid the destruction, a UVLO circuit with monitoring input voltage, and so on. The RP105x has the ultra-low on resistance output driver, the on resistance is Typ. 0.4 (VOUT = 0.8 V, IOUT = 300 mA). The built-in driver is Nch MOSFET, thus the load transient response is excellent, (under the condition of the current between 1 mA and 400 mA, tr = 0.5 s, the undershoot level is approximately 50 mV). The output voltage of this device is fixed with high accuracy. Since the packages for the device are DFN(PLP)1212-6, DFN1212-5, SOT-23-5 and SC-88A therefore high density mounting of the IC on boards is possible. FEATURES Supply Current ......................................................... Typ. 28 A Standby Current ....................................................... Typ. 0.1 A Ripple Rejection ....................................................... Typ. 80 dB (f = 1 kHz, V Ripple) IN . Typ. 50 dB (f = 1 kHz, V Ripple) BIAS Output Voltage Range .............................................. 0.6 V to 1.5 V (0.1 V step) For other voltages, refer to MARKING SPECIFICATION Input Voltage Range (V ) ..................................... 2.4 V to 5.25 V (VOUT < 0.8 V) BIAS Set V + 1.6 V to 5.25 V (V 0.8 V) OUT OUT Input Voltage Range (V ) ........................................ RP105xxxxB/D: 0.9 V to V (VOUT < 0.8 V) IN BIAS Set V + 0.1 V to V (V 0.8 V) OUT BIAS OUT RP105xxxxE/F: 0.9 V to V BIAS Output Voltage Accuracy .......................................... Typ. 15 mV (Ta = 25C) Temperature-Drift Coefficient of Output Voltage ...... Typ. 50 ppm/C Dropout Voltage ....................................................... DFN1212-5: Typ. 105 mV (I = 400 mA, V = 1.5 V, V = 3.6 V) OUT OUT BIAS Line Regulation ........................................................ Typ. 0.02%/V Packages ................................................................. DFN(PLP)1212-6, SC-88A, SOT-23-5, DFN1212-5 Built-in Fold Back Protection Circuit ........................ Typ. 120 mA (Current at short mode) Ceramic capacitors are recommended .................... C = C = 1.0 F or more, C = 2.2 F or more BIAS IN OUT APPLICATIONS Power source for battery-powered equipment. Power source for electrical appliances such as cameras, VCRs and camcorders. Power source for portable communication equipment. 1 *RP105Q (SC-88A) is the discontinued product as of April, 2018. No. EA-179-180419 SELECTION GUIDE (1) The output voltage, the UVLO circuit, the auto-discharge function , the package, and the taping type for the device are user-selectable options. Selection Guide Package Quantity per Reel Pb Free Halogen Free Product Name DFN(PLP)1212-6 5,000 pcs Yes Yes RP105Kxx1 -TR (2) SC-88A 3,000 pcs Yes Yes RP105Qxx2 -TR-FE SOT-23-5 3,000 pcs Yes Yes RP105Nxx1 -TR-FE DFN1212-5 5,000 pcs Yes Yes RP105Lxx1 -TR xx : The set output voltage (V ) can be designated within the range of SET 0.6 V (06) to 1.5 V (15) in 0.1 V step. If the set output voltage (VSET) is designated in 0.01 V step, indicate the product name as follows. 1.05 V: RP105x10x5-TR : CE pin polarity and auto-discharge function of the product can be defined as follows. (B) active, auto-discharge function is not included, UVLO is included (D) active, auto-discharge function is included, UVLO is included (E) active, auto-discharge function is not included, UVLO is not included (F) active, auto-discharge function is included, UVLO is not included BLOCK DIAGRAMS VBIAS VBIAS VIN VOUT VIN VOUT UVLO UVLO Vref Vref Current Limit Current Limit GND CE GND CE RP105xxxxB/E Block Diagram RP105xxxxD/F Block Diagram (1) Auto-discharge function quickly lowers the output voltage to 0 V, when the chip enable signal is switched from the active mode to the standby mode, by releasing the electrical charge accumulated in the external capacitor. (2) RP105Qxx2 -TR-FE supports only RP105Qxx2B/D. 2