Datasheet ADP5091, ADP5092 (Analog Devices)

Ultralow Power Energy Harvester PMUs with MPPT and Charge Management Data Sheet ADP5091/ ADP5092 FEATURES TYPICAL APPLICATION CIRCUIT Boost regulator with maximum power point tracking (MPPT) ADP5091 REG_D0 LLD TO MCU with dynamic sensing or no sensing mode FROM MCU REG_D1 REG_OUT Hysteresis mode for best ultralight load efficiency VID HYSTERESIS Operating quiescent current of SYS pin (V REG_FB REGULATOR IN > VCBP ≥ VMINOP): 510 nA AND LDO Sleeping quiescent current of SYS pin (V PIN PGOOD TO MCU CBP < VMINOP): 390 nA SW Input voltage operating range: 0.08 V to 3.3 V COLD START SYS SYSTEM VIN CHARGE PUMP LOAD Fast cold start from 380 mV (typical) with charge pump Programmable shutdown point on MINOP pin based on the MPPT BAT + RECHARGEABLE input open circuit voltage (OCV) MPPT BOOST BATTERY OR – CONTROL REGULATOR SUPERCAP CBP 150 mA regulated output from 1.5 V to 3.6 V REF Battery terminal charging threshold (2.2 V to 5.2 V) to support charging storage elements MINOP CHARGE CONTROL SETSD AND POWER PATH Optional BACK_UP power path management SETPG MANAGEMENT Radio frequency (RF) transmission conducive to shutting SETHYST FROM MCU DIS_SW down the switcher temporarily via microcontroller unit SETBK BACK_UP (MCU) communication TERM OPTIONAL + PRIMARY – AGND PGND BATTERY APPLICATIONS
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Photovoltaic (PV) cell energy harvesting
Figure 1.
Thermoelectric generators (TEGs) energy harvesting Industrial monitoring Self powered wireless sensor devices Portable and wearable devices with energy harvesting GENERAL DESCRIPTION
The ADP5091/ADP5092 are intelligent, integrated energy As a low light indicator for a microprocessor, the LLD pin of the harvesting, ultralow power management unit (PMU) solutions ADP5091 is the MINOP comparator output. However, the that convert dc power from PV cel s or TEGs. These devices charge REG_GOOD flag of the ADP5092 monitors the REG_OUT storage elements such as rechargeable Li-Ion batteries, thin film voltage. In addition, the DIS_SW pin can temporarily shut down batteries, super capacitors, or conventional capacitors, and the boost regulator and is RF transmission friendly. power up small electronic devices and battery free systems. The charging control function of the ADP5091/ADP5092 protects The ADP5091/ADP5092 provide efficient conversion of the the rechargeable energy storage, which is achieved by monitoring harvested limited power from a 6 µW to 600 mW range with the battery voltage with the programmable charging termination submicrowatt operation losses. With the internal cold start circuit, voltage and the shutdown discharging voltage. In addition, a the regulator can start operating at an input voltage as low as programmable PGOOD flag monitors the SYS voltage. 380 mV. After cold startup, the regulator is functional at an An optional primary cel battery can be connected and managed input voltage range of 0.08 V to 3.3 V. An additional 150 mA by an integrated power path management control block that is regulated output can be programmed by an external resistor programmable to switch the power source from the energy divider or the VID pin. harvester, rechargeable battery, and primary cell battery. The MPPT control keeps the input voltage ripple in a fixed range to The ADP5091/ADP5092 are available in a 24-lead LFCSP and maintain stable dc-to-dc boost conversion. The dynamic sensing are rated for a −40°C to +125°C temperature range. mode and no sensing mode, both programming regulation points of the input voltage, al ow extraction of the highest possible energy from the harvester. A programmable minimum operation threshold enables boost shutdown during a low input condition.
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Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION REVISION HISTORY DETAILED FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS REGULATED OUTPUT SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION FAST COLD START-UP CIRCUIT (VSYS < VSYS_TH, VIN > VIN_COLD) MAIN BOOST REGULATOR (VBAT_TERM > VSYS > VSYS_TH) VIN OPEN CIRCUIT AND MPPT MINIMUM OPERATION THRESHOLD FUNCTION DISABLING BOOST REGULATED OUTPUT WORKING MODE REG_D0 AND REG_D1 REGULATED OUTPUT CONFIGURATION REG_GOOD (ADP5092 ONLY) ENERGY STORAGE CHARGE MANAGEMENT BACKUP STORAGE PATH BACKUP AND BAT SELECTION THRESHOLD BATTERY OVERCHARGING PROTECTION BATTERY DISCHARGING PROTECTION POWER GOOD (PGOOD) POWER PATH WORKING FLOW CURRENT-LIMIT AND SHORT-CIRCUIT PROTECTION THERMAL SHUTDOWN APPLICATIONS INFORMATION ENERGY HARVESTER SELECTION ENERGY STORAGE ELEMENT SELECTION INDUCTOR SELECTION CAPACITOR SELECTION Input Capacitor SYS Capacitor REG_OUT Capacitor CBP Capacitor LAYOUT AND ASSEMBLY CONSIDERATIONS TYPICAL APPLICATION CIRCUITS FACTORY PROGRAMMABLE OPTIONS OUTLINE DIMENSIONS ORDERING GUIDE