Datasheet AEM00940 (E-peas)

DATASHEET AEM00940 Highly efficient, regulated dual-output, ambient energy manager for Source Voltage Level Configuration with optional primary battery Features Description
Ultra-low power start-up: The AEM00940 is an integrated energy management circuit - Cold start from 380 mV input voltage and 3 µW input that extracts DC power to simultaneously store energy in a power (typical) rechargeable element and supply the system with two Constant input voltage regulation: independent regulated voltages. The AEM00940 al ows to extend battery lifetime and ultimately eliminates the primary - Optimized for intermittent and pulse power energy storage element in a large range of source such as - Selectable operating input voltage from 50 mV to pulse source, intermittent source, capacitive source and 4.5V constant MPP source. - Up to 110 mA current extracted from the harvester Integrated 1.2 V/1.8 V LDO regulator: The AEM00940 harvests the available input current up to 110 mA while regulating the source at a voltage that is - Up to 20 mA load current configured by the user. It integrates an ultra-low power boost - Power gated dynamical y by external control converter to charge a storage element, such as a Li-ion - Selectable output voltage battery, a thin film battery, a supercapacitor or a Integrated 1.8 V - 4.1 V LDO regulator conventional capacitor. - Up to 80 mA load current with 300 mV drop-out - Power gated dynamical y by external control Thanks to its selectable operating input voltage, it is possible - Selectable or adjustable output voltage to set a voltage at which the AEM00940 operates. This voltage is between 50 mV et 4.5 V. With its unique cold-start Flexible energy storage management: circuit, it can start operating with empty storage elements at - Selectable or ajustable overcharge and overdis- an input voltage as low as 380 mV and an input power of just charge protection for any type of rechargeable 3 µW. battery or (super)capacitor - Fast supercapacitor charging The low-voltage supply typical y drives a microcontrol er at - Indication when battery is running low 1.2 V or 1.8 V. The high-voltage supply typical y drives a radio - Indication when output voltage regulators are transceiver at a configurable voltage between 1.8 V and 4.1 V. available Both are driven by highly-efficient LDO (Low DropOut) regulators for low noise and high stability. Optional primary battery: - Automatic switching to the primary battery when the Configuration pins determine various operating modes by secondary battery is exhausted setting predefined conditions for the energy storage element (overcharge or overdischarge voltages), and by selecting the Integrated balun for dual-cel supercapacitor voltage of the high-voltage supply and the low-voltage supply.
Applications
The chip integrates al the active elements for powering a typical wireless sensor. Five capacitors, two inductors and • Door access systems • Smart wearable sensors two resistors are required, available in the smal 0402 and • Smart switches home/building • Point-of-Sales (POS) 0603 size, respectively. With only seven external components, integration is maximum, footprint and BOM are minimum, optimizing the time to-market and the costs of designs. CSRC LBOOST CBOOST CBUCK LBUCK 10μF 10μH 22μF 10μF 10μH C T K K R ST C S O C F O U B B BOOS BU BU Li-ion SRC PV cell BATT SW SW battery Primary Radio battery PRIM AEM00940 HVOUT ] CHV transceiver (optional) :0 10μF E[1 G R9 N Micro- BUCK SRC_LVL_U A R ] LVOUT 0 controler L_ CLV R10 LV 10μF _ D [2: SRC_LVL_D G C GN CF SR VBUCK DS D _A _ E A M0 M 094 9 0_Rev e 1.0. 0 0 Copyr y ight h © 2022 2 e-pe p as a SA S Confidential 1 Document Outline 1. Introduction 2. Absolute Maximum Ratings 3. Thermal Resistance 4. Typical Electrical Characteristics at 25 °C 5. Recommended Operation Conditions 6. Functional Block Diagram 7. Theory of Operation 7.1. Deep sleep & Wake up modes 7.1.1. Supercapacitor as a storage element. 7.1.2. Battery as a storage element. 7.2. Normal mode 7.2.1. Boost 7.2.2. Buck 7.2.3. LDO outputs 7.3. Overcharge mode 7.4. Primary mode 7.5. Shutdown mode 7.6. Balun for dual-cell supercapacitor 8. System configuration 8.1. Battery and LDOs configuration 8.1.1. Custom mode 8.2. Source voltage configuration 8.3. Primary battery configuration 8.4. No-battery configuration 8.5. Storage element information 8.6. External inductors information 8.7. External capacitors information 9. Typical Application Circuits 9.1. Example circuit 1 9.2. Example circuit 2 10. Performance Data 10.1. BOOST conversion efficiency for LBOOST = 10 µH 10.2. BOOST conversion efficiency for LBOOST = 22 µH 10.3. Quiescent current 10.4. High-voltage LDO regulation 10.5. Low-voltage LDO regulation 10.6. High-voltage LDO efficiency 10.7. Low-voltage LDO efficiency 11. Schematic 12. Layout Package Information 13.1. Plastic Quad Flatpack No-lead (QFN 28-pin 5x5mm) 13.2. Board Layout 14. Revision History