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DA9063L Datasheet(PDF) 74 Page - Dialog Semiconductor |
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DA9063L Datasheet(HTML) 74 Page - Dialog Semiconductor |
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74 / 173 page  DA9063L System PMIC for Mobile and Automotive Applications Datasheet DA9063L_2v1 05-Apr-2017 CFR0011-120-00 74 of 173 © 2017 Dialog Semiconductor 6.9 Voltage Regulators Three types of low drop-out regulators (LDOs) are integrated on the DA9063L: for sensitive analog rails (for example, RF transceiver supply), the low noise regulators offer high PSRR across a wide frequency range; the LDOs provide an optimized PSRR and noise performance with lowest quiescent current. Quiescent current has been optimized for the always-on type regulators. The regulators employ Dialog Semiconductor’s Smart Mirror™ dynamic biasing that guarantees PSRR to be maintained across the full current range. Quiescent current consumption is dynamically adjusted to the load, which improves efficiency at light load conditions. Furthermore, Dialog Semiconductor’s Smart Mirror™ technology allows the capacitor to be placed close to the load. Note When placing an LDO capacitor remotely from the DA9063L, the voltage drop (= load current * parasitic PCB impedance) needs to be considered when configuring the LDO output voltage. Table 33: Regulator Control Regulator Type VOUT Steps (mV) Mode Output Voltage (V) Supplied Max. Current (mA) Current Limit LDO/ Bypass (mA) VOUT Control Notes LDO3 Standard 20 Bypass 0.9 to 3.44 200 400/200 DVC variable slew rate LDO7 Standard 50 Bypass 0.9 to 3.6 200 400/300 VOUT programmable LDO8 Standard 50 Bypass 0.9 to 3.6 200 400/300 VOUT programmable Switching vibration motor driver, common supply with LDO7 LDO9 Low noise 50 0.95 to 3.6 200 400 VOUT programmable LDO11 Standard 50 Bypass 0.9 to 3.6 300 400/300 VOUT programmable LDOCORE Always-on 2.5 ±2% accuracy 4 VOUT non- programmable Internal LDO 6.9.1 Regulators Controlled by Software The regulators can be programmed via the power manager interface. All regulators can be enabled or disabled by a write command to the enable bit LDOxx_EN. Each LDO has two voltage registers for output voltage A and B. The appropriate values are stored in the registers VLDOxx_A and VLDOxx_B. The specific output voltage is selected with the bit VLDOxx_SEL. Changes to this control result in immediate output voltage changes on non-DVC regulators and ramped voltage transitions on DVC-enabled regulators. The output voltage can also be changed by directly re-programming the voltage control register. The sequencer also uses these registers and may write to them: their contents can therefore be found to differ from previous write commands. For security reasons, the re-programming of registers that may cause damage when being incorrectly programmed (for example, voltage settings) can be disabled with control V_LOCK. This disables write access to registers with an address higher than 0x7F. |
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