Analog Devices ADP5090

Description

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, andpowers up small electronic devices and battery-free systems. The ADP5090 provides efficient conversion of the harvestedlimited 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 andprogrammable 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 theboost 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 terminationvoltage and shutdown discharging voltage. In addition, aprogrammable 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 LFCSPpackage and is rated for a −40°C to +125°C junctiontemperature range.

Features

• 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) orthermoelectric generator (TEG) energy sources
• Programmable shutdown point on MINOP pin
• Energy storage management
• Programmable voltage monitor (2.2 V to 5.2 V) to supportcharging and prevent overcharging or overdischargingPower 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

Typical applications

• PV cell energy harvesting
• Industrial monitoring
• Battery regulator powered by solar panel
• TEG energy harvesting
• Portable and wearable devices with energy harvesting
• Self powered wireless sensor devices

More information

• Datasheet
• IC product information