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AS3715 Datasheet(PDF) 32 Page - ams-OSRAM AG |
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AS3715 Datasheet(HTML) 32 Page - ams-OSRAM AG |
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32 / 159 page ![]() ams Datasheet Page 31 [v1-03] 2015-Aug-10 Document Feedback AS3715 − Detailed Description – Power Management Functions Figure 32: LDO External Components LDO External Components: Shows the external component parameter of the linear regulators. Low Power LDO V2_5 Regulator Description The low power LDO V2_5 is needed to supply the chip core (analog and digital) of the device. It is designed to get the lowest possible power consumption, and still offering reasonable regulation characteristics. The regulator has three supply inputs selecting automatically the higher one. This gives the possibility to supply the chip core either with the VIBAT, VEBAT, VSUP or VUSBx depending on the conditions. Bulk switch comparators are used to avoid any parasitic current flow. To ensure high PSRR and stability, a low-ESR ceramic capacitor of min. 0.7μF must be connected to the output. Parameter Figure 33: Low Power LDO Parameter Low Power LDO Parameter: Shows the key electrical parameter of the low power V2_5 linear regulator. Symbol Parameter Conditions Min Typ Max Unit COUT_LDO3-8 Output capacitor Ceramic X5R or X7R 0.7 μF CVIN_LDO3-8 Input capacitor Ceramic X5R or X7R 1 μF Symbol Parameter Conditions Min Typ Max Unit Supply voltage rage see VIBAT, VEBAT, VSUP, VUSB1 or VUSB2 RON ON resistance Guaranteed per design 50 Ω IOFF Shut down current 100 nA IVDD Supply current Guaranteed per design, consider chip internal load for measurements. 3μA tSTART Startup time 200 μs VOUT Output voltage 2.4 2.5 2.6 V IOUT Output current VSUP>3.0V in power_off mode 3 mA |
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