RP122K251B-TR Nisshinbo

RP122x Series 400 mA Low Noise and Low Supply Current LDO Regulator No.EA-403-210426 OVERVIEW The RP122x is an LDO regulator that provides low output noise, high ripple rejection and fast response characteristics, achieved by low supply current. This device is suitable not only for noise-sensitive applications such as high-performance analog circuits, but also for various applications. KEY BENEFITS Achieves Low Noise, High PSRR and Fast Response. Provides Saving Space by Adopting of 4-pin Small Package without Noise Bypass Capacitor. Provides Long-Duration of Operation for Battery-powered Equipment by Low Supply Current of 9.5 A (Typ.), despite the low-noise LDO. KEY SPECIFICATIONS Input Voltage Range (Max.Rating):1.9 V to 5.5 V (6.0 V) Output Voltage Range: 1.2 V to 4.8 V (0.1 V step) Output Voltage Accuracy: 0.8% (VSET 1.8 V, Ta = 25C) Supply Current: Typ. 9.5 A Output Noise: Typ. 8 Vrms (IOUT = 250 mA) Ripple Rejection: Typ. 90 dB (f = 1kHz) Typ. 85 dB (f = 10kHz) Typ. 65 dB (f = 100kHz) Dropout Voltage: Typ. 0.145 V (IOUT = 400 mA, VSET = 2.8 V, RP122Z) Typ. 0.170 V (IOUT = 400 mA, VSET = 2.8 V, RP122K) Protection Features: Thermal Shutdown Protection (Detection Temp. Typ.165C) Inrush Current Limit at Typ.250mA for appr.700s period after startup Ceramic Capacitor (CIN, COUT): 1.0 F or more (No Need of Noise Bypass Capacitor) APPLICATIONS TYPICAL APPLICATIONS Mobile Phones and Tablets, Digital Cameras, VDD VOUT VOUT Audio Devices, and Battery-powered RP122x VIN C C IN OUT Equipment RF Modules CE GND Clock Generator: VCO, PLL, etc. CE Control Noise-sensitive Devices: ADC, DAC Without a bypass capacitor for noise PACKAGE WLCSP-4-P8 WLCSP-4-P12 DFN(PLP)1010-4 0.64 x 0.64 x 0.36 (mm) 1.00 x 1.00 x 0.6 (mm) 0.64 x 0.64 x 0.26 (mm) 1 RP122x No.EA-403-210426 SELECTION GUIDE (1) The set output voltage and the auto-discharge function are user-selectable. Product Name Package Quantity per Reel Pb Free Halogen Free RP122Zxx1-TR-F WLCSP-4-P8 5,000 pcs Yes Yes RP122Zxx3-TR-F WLCSP-4-P12 10,000 pcs Yes Yes RP122Kxx1-TR DFN(PLP)1010-4 10,000 pcs Yes Yes xx: Specify the set output voltage (V ) within the range of 1.2 V to 4.8 V in 0.1 V steps. SET The voltage in 0.05 V step is shown as follows. Ex. 1.85 V: RP122x18x5 : Specify whether with the auto-discharge or not. B: without the auto-discharge function D: with the auto-discharge function BLOCK DIAGRAMS VDD VOUT VDD VOUT Thermal Thermal Shutdown Shutdown Vref Vref Noise Noise Reduction Reduction Current Current Limit Limit Enable Enable Control Control CE GND CE GND RP122xxxxB Block Diagram RP122xxxxD 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