Solution of ultra-low power boost voltage regulator

ADI's ADP5090 is an ultra low power boost regulator that converts photovoltaic or Teg DC POWER TO LITHIUM ION batteries, thin film batteries, ultracapacitors and conventional capacitors, as well as all small appliances and battery free systems.

It can effectively convert 16 uw to 200 MW harvest power, and the working loss is less than 1uw. Input Voltage 80 MV TO 3.3 v.

ADI ADP5090 is mainly used for photovoltaic energy collection, TEG energy collection, battery voltage regulator, . Self-powered wireless sensor devices, energy-harvesting hand-held and wearable devices.

This paper introduces the main characteristics of ADP 5090, block diagram, ADP 5059 Evaluation Board for ultra-low power boost voltage regulator.

The description of ADI ADP5090

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.

The key features of ADP5090

1.Boost regulator with maximum power point tracking (MPPT)

2.Hysteretic controller for best ultralight load efficiency.

3.320 nA ultralow quiescent current (CBP ≥ MINOP)

4.Input voltage operation range from 80 mV to 3.3 V.

5.Open circuit voltage (OCV) sensing for MPPT

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

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

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

The application of ADP5090

1.PV cell energy harvesting

2.TEG energy harvesting

3.Battery regulator powered by solar panel Industrial monitoring

4.Self powered wireless sensor devices

5.Portable and wearable devices with energy harvestin

ADP5059 EVALUATION BOARD FOR ULTRA-LOW POWER BOOST REGULATORS

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.