RP514x Series Ultra-low Power Consumption 100 mA Buck DC/DC Converter with Battery Monitor No.EA-504-190328 OVERVIEW The RP514x is a buck DC/DC converter with a Battery Monitor (BM) featuring ultra-low current and low- voltage resistance. The battery monitor divides the input voltage (V ) into 1/3 or 1/4, and directly provides IN the MCUs built-in low voltage AD converter with buffered voltage without external circuits. KEY BENEFITS Ultra-low consumption current (I :0.3 A ) with the VFM control for DC/DC (switching frequency: 1 MHz max.) Q High efficiency under light load conditions: 90% with 1.8 V and 100 mA Reducing components and space by combining DC/DC and BM into a single chip Suitable for coin batteries and USB ports due to its wide input voltage range from 1.8 V to 5.5 V PACKAGES KEY SPECIFICATIONS DC/DC Section Supply Current: Typ. 0.3 A Output Current: 100 mA Input Voltage Range: 1.8 V to 5.5 V Output Voltage Range : 1.0 V to 4.0 V Output Voltage Accuracy: 1.5% Battery Monitor Section WLCSP-9-P2 DFN(PLP)2527-10 Output Voltage: VIN /3 (RP514xxx3x) 1.45 x 1.48 x 0.36 (mm) 2.7 x 2.5 x 0.6 (mm) VIN /4 (RP514xxx4x) Supply Current: Typ. 0.1 A TYPICAL APPLICATIONS RP514x MCU L V OUT CE1 LX Signal VCC 2.2 H VOUT PVIN Buck (Step-down) V IN DC/DC Converter PGND C OUT1 22 F AVIN AGND Battery Monitor CE2 BM VBM Signal ADC C C IN OUT2 10 F 0.1F to 0.22 F C = Ceramic Capacitor APPLICATIONS Coin cell-used equipment and Li-ion battery-used equipment Wearable devices such as SmartWatch, SmartBand and Health monitoring Low Power RF Modules such as Bluetooth LE, Zigbee, WiSun and ANT Low Power CPU, Memory, Sensor device and Energy Harvester 1 RP514x No.EA-504-190328 SELECTION GUIDE (1) The set output voltage for DC/DC, the division ratio of BM output voltage, the auto-discharge function for DC/DC and the packages are user-selectable options. Selection Guide Product Name Package Quantity per Reel Pb Free Halogen Free RP514Zxx -TR-F WLCSP-9-P2 5,000 pcs Yes Yes RP514Kxx -TR DFN(PLP)2527-10 5,000 pcs Yes Yes xx: Specify the set output voltage for DC/DC (VSET).within the range from 1.0 V (10) to 4.0 V (40) The voltage in 0.05 V step is shown as follows: Ex. 1.25 V: RP514x12xx5 Refer to the Product-specific Electrical Characteristics for detail information. * Contact our sales representatives for other voltages. : Select the division ratio of BM output voltage. 3: VIN /3 4: V /4 IN : Select the auto-discharge option for DC/DC. A: DC/DC auto-discharge is not included B: DC/DC auto-discharge is included (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