Datasheet AEM00940 (E-peas) - 3

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DATASHEET AEM00940 List of Figures
Figure 1: Simplified schematic view . 5 Figure 2: Pinout diagram QFN 28-pin. 6 Figure 3: Functional block diagram . .10 Figure 4: Simplified schematic view of the AEM00940 . .11 Figure 5: Diagram of the AEM00940 modes . .11 Figure 6: Custom configuration resistors . 14 Figure 7: Typical application circuit 1 . 17 Figure 8: Typical application circuit 2 . 18 Figure 9: Cold start with a capacitor connected to BATT . 19 Figure 10: Cold start with a battery connected to BATT . .19 Figure 11: Overvoltage mode. 20 Figure 12: Boost efficiency for Isrc at 100µA, 1mA, 10mA and 100mA (LBOOST = 10 µH) . .21 Figure 13: Boost efficiency for Isrc at 100µA, 1mA and 10mA (LBOOST = 22 µH) . 22 Figure 14: Quiescent current with LDOs on and off. 22 Figure 15: HVOUT at 3.3 V and 2.5 V. .23 Figure 16: LVOUT at 1.2 V and 1.8 V. 23 Figure 17: HVOUT efficiency at 1.8V, 2.5V and 3.3 V (values at 350 mA are from simulations). .24 Figure 18: Efficiency of buck cascaded with LVOUT at 1.2 V and 1.8 V. .25 Figure 19: Schematic example. .26 13. Layout example for the AEM00940 and its passive components. 28 Figure 20: QFN 28-pin5x5mm drawing (al dimension in mm). 28 Figure 21: Recommended board layout (al dimension in mm). 28 DS_AEM00940_Rev1.0 Copyright © 2022 e-peas SA 3 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