原标题：ADI ADP5090超低功耗升压稳压器解决方案

　　ADI公司的ADP5090是超低功耗升压稳压器,可以转换光伏电池板或TEG的DC电源,对锂电池,薄膜电池,超级电容和传统电容以及所有小型电器和无电池系统进行到底充电.能对16uW到200mW收获电源进行有效的转换,而工作损耗小于1uW.输入电压80 mV 到3.3 V,主要用于光伏电池能量收集,TEG能量收集, 电池稳压器,.自供电的无线传感器设备,带能量收集的手持和穿戴设备.本文介绍了ADP5090主要特性,框图,多种应用电路以及ADP5059超低功耗升压稳压器评估板主要特性,电路图,材料清单和PCB设计图.

　　The ADP5090 is an integrated boost regulator that converts dc power from PV cells or TEGs. The device charges storage elements such as rechargeable Li-Ion batteries, thin film batteries, super capacitors, and conventional capacitors, and powers up small electronic devices and battery-free systems. The ADP5090 provides efficient conversion of the harvested limited power from a 16 μW to 200 mW range with sub-μW operation losses. With the internal cold-start circuit, the regulator can start operating at an input voltage as low as 380 mV. After cold startup, the regulator is functional at an input voltage range of 80 mV to 3.3 V. By sensing the input voltage at the VIN pin, the control loop keeps the input voltage ripple in a fixed range to maintain stable dc-to-dc boost conversion.

　　The VIN OCV sensing and programmable regulation points of the input voltage allow extraction of the highest possible energy from the PV cell or TEG harvester. A programmable minimum operation threshold (MINOP) enables boost shutdown during a low light condition. In addition, the DIS_SW pin can temporarily shut down the boost regulator and is RF transmission friendly. The charging control function of ADP5090 protects rechargeable energy storage, which is achieved by monitoring the battery voltage with programmable charging termination voltage and shutdown discharging voltage. In addition, a programmable PGOOD flag monitors the SYS voltage. An optional primary cell battery can be connected and managed by an integrated power path management control block that automatically switches the power source from the energy harvester, rechargeable battery, and primary cell battery. The ADP5090 is available in a 16-lead, 3 mm × 3 mm LFCSP package and is rated for a −40℃ to +125℃ junction temperature range.

　　ADP5090主要特性:

　　Boost regulator with maximum power point tracking (MPPT)

　　Hysteretic controller for best ultralight load efficiency

　　320 nA ultralow quiescent current (CBP ≥ MINOP)

　　260 nA ultralow quiescent current (CBP < MINOP)

　　Input voltage operation range from 80 mV to 3.3 V

　　Cold start from 380 mV (typical) with charge pump

　　Open circuit voltage (OCV) sensing for MPPT

　　Programmable MPPT ratio for photovoltaic (PV) or thermoelectric generator (TEG) energy sources Programmable shutdown point on MINOP pin

　　Energy storage management

　　Programmable voltage monitor (2.2 V to 5.2 V) to support charging and prevent overcharging or overdischarging

　　Power path management for an optional backup primary cell battery connected to the BACK_UP pin

　　RF transmission friendly

　　Temporary shutdown boost regulator via microcontroller (MCU) communication

　　ADP5090应用:

　　PV cell energy harvesting

　　TEG energy harvesting

　　Battery regulator powered by solar panel Industrial monitoring

　　Self powered wireless sensor devices

　　Portable and wearable devices with energy harvesting

　　图1. ADP5090框图

　　图2. ADP5090典型应用框图

　　图3. ADP5090应用电路(1)

　　图4. ADP5090应用电路(2)

　　图5. ADP5090应用电路(3)

　　图6. ADP5090应用电路(4)

　　ADP5059超低功耗升压稳压器评估板

　　The ADP5090 is an ultralow, power synchronous, dc-to-dc boost regulator in a compact 3 mm × 3 mm LFCSP_WQ package. The ADP5090 runs from input voltages of 0.38 V to 3.3 V and requires minimal external components to provide a high efficiency solution with an integrated power switch, a synchronous rectifier, and battery management. The EVAL-ADP5090 evaluation board provides an easy way to evaluate the device. This user guide describes how to quickly set up the board and deliver up to 3.5 V maximum voltage to the SYS output using an external resistor divide. The internal switches turn on if the storage element voltage at the BAT pin is above the externally programmed SETSD voltage of 2.4 V. The PGOOD indicator toggles high when the SYS pin ramps up to 3 V. Complete information about the ADP5090 is available in the corresponding data sheet. Consult the data sheet in conjunction with this user guide when using the evaluation board.

　　图7. ADP5059超低功耗升压稳压器评估板外形图

　　图8. ADP5059超低功耗升压稳压器评估板电路图

　　ADP5059超低功耗升压稳压器评估板材料清单: