JAJSLW7B December 2020 – September 2023 TPS6593-Q1
PRODUCTION DATA
The LDO1, LDO2 and LDO3 regulators can deliver up to 500 mA of current, with a configurable output range of 0.6 V to 3.3 V in 50-mV steps. These 3 LDO regulators also support bypass mode, which allows an input voltage at the PVIN_LDOn to show up at the VOUT_LDOn pin. This feature allows the LDOs to be configured as load switches with power sequencing control. Similar to the buck regulators mentioned in Section 8.3.2.1.4, the UV/OV Voltage Monitor of an un-used LDO regulator can also be used to monitor an external voltage rail by connecting the external rail to the VOUT_LDOn pin.
The bypass capability to connect the input voltage to the output in bypass mode is supported when the input voltage is within the 1.7 V to 3.5 V range. This bypass capability also allows the LDO to switch from 3.3 V in bypass mode to 1.8 V in LDO mode or from 1.8 V in LDO mode to 3.3 V in bypass mode for an SD card I/O supply.
The LDO1, LDO2 and LDO3 regulator include a Current-Limit to protect the internal Power-FET against overcurrent. This Current-Limit has a fixed value between 700 mA and 1800 mA.
It is important to wait until the LDO has settled on the target voltage from the previous change when changing the LDO output voltage setting. The worst-case voltage scaling time for LDO1, LDO2, and LDO3 is 63 µs x (7 + the number of 50-mV steps to the new target voltage).
Table 8-4 shows the coding used to select the output voltage for LDO1, LDO2, and LDO3.
LDOx_VSET | Output Voltage [V] | LDOx_VSET | Output Voltage [V] | LDOx_VSET | Output Voltage [V] | LDOx_VSET | Output Voltage [V] |
---|---|---|---|---|---|---|---|
0x00 | Reserved | 0x10 | 1.20 | 0x20 | 2.00 | 0x30 | 2.80 |
0x01 | Reserved | 0x11 | 1.25 | 0x21 | 2.05 | 0x31 | 2.85 |
0x02 | Reserved | 0x12 | 1.30 | 0x22 | 2.10 | 0x32 | 2.90 |
0x03 | Reserved | 0x13 | 1.35 | 0x23 | 2.15 | 0x33 | 2.95 |
0x04 | 0.60 | 0x14 | 1.40 | 0x24 | 2.20 | 0x34 | 3.00 |
0x05 | 0.65 | 0x15 | 1.45 | 0x25 | 2.25 | 0x35 | 3.05 |
0x06 | 0.70 | 0x16 | 1.50 | 0x26 | 2.30 | 0x36 | 3.10 |
0x07 | 0.75 | 0x17 | 1.55 | 0x27 | 2.35 | 0x37 | 3.15 |
0x08 | 0.80 | 0x18 | 1.60 | 0x28 | 2.40 | 0x38 | 3.20 |
0x09 | 0.85 | 0x19 | 1.65 | 0x29 | 2.45 | 0x39 | 3.25 |
0x0A | 0.90 | 0x1A | 1.70 | 0x2A | 2.50 | 0x3A | 3.30 |
0x0B | 0.95 | 0x1B | 1.75 | 0x2B | 2.55 | 0x3B | Reserved |
0x0C | 1.00 | 0x1C | 1.80 | 0x2C | 2.60 | 0x3C | Reserved |
0x0D | 1.05 | 0x1D | 1.85 | 0x2D | 2.65 | 0x3D | Reserved |
0x0E | 1.10 | 0x1E | 1.90 | 0x2E | 2.70 | 0x3E | Reserved |
0x0F | 1.15 | 0x1F | 1.95 | 0x2F | 2.75 | 0x3F | Reserved |