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 LLD TO MCU REG D0 with dynamic sensing or no sensing mode REG D1 REG OUT FROM MCU Hysteresis mode for best ultralight load efficiency VID HYSTERESIS REG FB REGULATOR Operating quiescent current of SYS pin (V > V V ): 510 nA IN CBP MINOP AND LDO P IN PGOOD TO MCU Sleeping quiescent current of SYS pin (V < V ): 390 nA CBP MINOP SW COLD START SYS SYSTEM Input voltage operating range: 0.08 V to 3.3 V VIN CHARGE PUMP LOAD Fast cold start from 380 mV (typical) with charge pump MPPT BAT Programmable shutdown point on MINOP pin based on the RECHARGEABLE + BATTERY OR MPPT BOOST input open circuit voltage (OCV) 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 MINOP CHARGE CONTROL SETSD support charging storage elements AND POWER PATH SETPG MANAGEMENT Optional BACK UP power path management Radio frequency (RF) transmission conducive to shutting SETHYST DIS SW FROM MCU SETBK down the switcher temporarily via microcontroller unit BACK UP TERM OPTIONAL + (MCU) communication PRIMARY AGND PGND BATTERY APPLICATIONS 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 cells 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 W 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 cell 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 40C to +125C temperature range. mode and no sensing mode, both programming regulation points of the input voltage, allow extraction of the highest possible energy from the harvester. A programmable minimum operation threshold enables boost shutdown during a low input condition. Rev. A Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20162017 Analog Devices, Inc. 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Technical Support www.analog.com 14145-001ADP5091/ADP5092 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Regulated Output Configuration ............................................. 17 Applications ....................................................................................... 1 REG GOOD (ADP5092 Only) ................................................ 18 Typical Application Circuit ............................................................. 1 Energy Storage Charge Management ...................................... 18 General Description ......................................................................... 1 Backup Storage Path................................................................... 18 Revision History ............................................................................... 2 Backup and BAT Selection Threshold ..................................... 19 Detailed Functional Block Diagram .............................................. 3 Battery Overcharging Protection ............................................. 19 Specifications ..................................................................................... 4 Battery Discharging Protection ................................................ 19 Regulated Output Specifications ................................................ 6 Power Good (PGOOD) ............................................................. 20 Absolute Maximum Ratings ............................................................ 7 Power Path Working Flow......................................................... 20 Thermal Resistance ...................................................................... 7 Current-Limit and Short-Circuit Protection .............................. 20 ESD Caution .................................................................................. 7 Thermal Shutdown .................................................................... 21 Pin Configurations and Function Descriptions ........................... 8 Applications Information .............................................................. 23 Typical Performance Characteristics ........................................... 10 Energy Harvester Selection ....................................................... 23 Theory of Operation ...................................................................... 16 Energy Storage Element Selection ........................................... 23 Fast Cold Start-Up Circuit (V < V , V > V ) ... 16 Inductor Selection ...................................................................... 23 SYS SYS TH IN IN COLD Main Boost Regulator (VBAT TERM > VSYS > VSYS TH) ..................... 16 Capacitor Selection .................................................................... 24 VIN Open Circuit and MPPT .................................................. 16 Layout and Assembly Considerations ..................................... 24 Minimum Operation Threshold Function ............................. 17 Typical Application Circuits ..................................................... 25 Disabling Boost ........................................................................... 17 Factory Programmable Options ................................................... 27 Regulated Output Working Mode ............................................ 17 Outline Dimensions ....................................................................... 28 REG D0 and REG D1 .............................................................. 17 Ordering Guide .......................................................................... 28 REVISION HISTORY 5/2017Rev. 0 to Rev. A Changes to Figure 2 .......................................................................... 3 Changes to Figure 7, Figure 10, Figure 7 Caption, and Figure 10 Caption ............................................................................................. 10 Changes to Figure 11 and Figure 11 Caption ............................. 11 Changed CP-24-10 to CP-24-14 .................................. Throughout Updated Outline Dimensions ....................................................... 28 Changes to Ordering Guide .......................................................... 28 7/2016Revision 0: Initial Version Rev. A Page 2 of 28