PMIC for NXP i.MX 7Solo / Dual Ideal for Portable Electronics BD71815GW Features Target Applications • E-readers, POS, wearables • Integrates 5 low-lq buck regulators and • Portable and hand-held 7 LDOs with programmable outputs battery-operated devices • 500mA li-ion/li-polymer JEITA-compliant Home automation, consumer and industrial IoT • battery charger (up to 2A with external FET) • Fuel Gauge with Coulomb Counter based on low-power 15-bit ΣΔ ADC and ROHM’s TrueSoC algorithm • Real Time Clock with 32.768kHz crystal oscillator Power Rails • 25mA single string dimmable LED Output Load Output Power i.MX 7Solo/Dual Voltage Max. Channel Supply Usage example driver for up to 6 white LEDs (Default) (mA) VDD_ARM 800 BUCK1 PVIN1 1.100V • l2C interface (100kHz, 400kHz) VDD_SOC 1000 BUCK2 PVIN2 1.000V • Power consumption during sleep mode: 20μA with RTC, SNVS LDO, and fuel gauge active • Extensive protection and monitoring functions, including 30V OVP • Package: WL-CSP, 4.0×4.0×0.62mm Pin pitch: 0.4mm NVCC_1P8, VDDA_1P8 BUCK3 NVCC_DRAM BUCK4 Peripheral BUCK5 NVCC_GPIO2 LDO1 NVCC_3P3 LDO2 VDDA_USB1,2_3P3 LDO3 SD Card/eMMC LDO4 SD Card/eMMC Interface LDO5 DDR_VREF LDO6 LPSR-LPSR,NVCC_GPO1 LDO7 SNVS LDO8 ‒ LED Driver LDO_2 3.3V : 100mA Buck_4 1.2V : 1200mA Power ON/OFF sequencer LDO_4 3.3V : 400mA Buck_5 3.3V : 1000mA LDO_SNVS 3.0V : 25mA GPO x1ch LDO_LPSR 1.8V : 100mA Colomb Counter DDR_VREF 0.5×DVREFIN/ 10mA LIB Charger ・Ichg=500mA max ・Up to 2A with external FET ・30V-OVP I2C Interface RTC/32kHz crystal OSC Variable Current LED Boost Driver Timer / Alarm 10µA to 25mA ROHM BD71805MWV 12 Unit µA BUCK2 Efficiency vs. Load Current 100 90 80 LDO_5 3.3V/1.8V:250mA ROHM BD71815GW 10 PWM Frequency Efficiency [ % ] Control Logic Current Consumption Mode Auto 70 60 PWM 50 40 30 20 10 0 0.1 1.0 10.0 Load Current [ mA ] 100.0 1000.0 95 Efficiency [%] LDO_3 3.3V : 50mA Buck_3 1.8V : 500mA 0.8 to 2.0V(25mV step) 0.8 to 2.0V(25mV step) 1.2 to 2.7V(50mV step) 1.1 to1.85V(25mV step) 1.8 to 3.3V(50mV step) 0.8 to 3.3V(50mV step) 0.8 to 3.3V(50mV step) 0.8 to 3.3V(50mV step) 0.8 to 3.3V(50mV step) 0.8 to 3.3V(50mV step) 0.5 to 1.35V The best solution for low-powered applications LDO_1 3.3V : 100mA Buck_2 - DVS 1.0V : 1000mA Adjustable range Advantages of BD71815GW Block Diagram Buck_1 - DVS 1.0V/1.1V : 800mA 500 PVIN3 1.800V 1000 PVIN4 1.200V 1000 PVIN5 3.300V 100 VINL1 3.300V 100 VINL1 3.300V 50 VINL1 3.300V 400 VINL2 3.300V 250 VINL2 3.300V VIN 0.5xDVREFIN 10 100 VIN 1.800V 100 VIN 1.800V 25 PVIN5 – UCSP55M4C 90 85 New technology Smoothly switches between PFM and PWM modes, providing greater efficiency with stable output. O: Provides maximum efficiency O: No mode switching ensures stable output Auto PWM/PFM Mode 80 Conventional 75 Abruptly transitions to PWM mode, 10.0 decreasing efficiency. X: Efficiency drop during mode transition from PFM to PWM X: Output change at mode switching PWM Mode 100.0 Load Current [mA] 1000.0 Advantages of BD71815GW Highly integrated design reduces solution size • Incorporates a li-ion battery charger, Coulomb Counter, and LED driver for backlighting • Ultra-compact WLCSP (4mm × 4mm, 0.4mm pitch) Reduces footprint by 75% • High switching frequency allows very small inductors to be used (0.47µH) External coil (from 0.47µH to 2.2µH) contributes to increased miniaturization and a lower profile <Conventional> Mode PWM Frequency PWM Frequency Charger ROHM BD71815GW ROHM BD71805MWV Unit 6.0 2.5 MHz <BD71815GW> PMIC (8×8mm) Total Area Reduced approx. 50% LED Driver Coil 2.2µH 2520 (2×3mm) Input Cap 10µF 1608 Charger PMIC (4×4mm) Coil 0.47µH 2016 ×4 Output Cap 10µF 1005 LED Driver Input Cap 4.7µF 1608 ×5 Output Cap 4.7µF 1005 JEITA-compliant charger and battery monitoring circuit ensure safe, stable charging On-chip 30V OVP reduces system BOM cost Block Diagram 30V OVP Charger System Surge input DCIN 30V VSYS 20V 0V VSYS DCIN No Surge output VSYS Colomb Counter 10mΩ Block Diagram Charge Current Capability : 0.5A ⇒ Up to 2A with external FET ROHM’s proprietary Fuel Gauge algorithm monitors battery temperature, voltage, and charge/discharge current in order to accurately estimate the remaining battery level. Sample code is available. Evaluation tools and design support ROHM’s PMIC evaluation board allows prospective customers to quickly and easily evaluate the features, performance, and power consumption of the BD71815GW. The board can also be connected to a PC, enabling users to configure and control the PMIC via GUI. • Linux and Android driver source codes are available • For software and/or system development, Embedded Artists’ System on Module (SOM) can be used with one of its application-specific carrier boards as a standard EVK or hardware development platform. EA’s iMX7 SOM integrates an i.MX 7D processor, BD71815GW PMIC, 8GB Flash memory, and 1GB LP-DDR3 in a compact 27mm x 37mm PCB. See the link below for further details http://www.rohm.com/web/global/products/-/product/BD71815GW May, 2016. 1st 58X6990E 5.2016 PDF