JAJSFE6I July 2009 – May 2018 TPS65070 , TPS65072 , TPS65073 , TPS650731 , TPS650732
UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.
CON_CTRL1 | B7 | B6 | B5 | B4 | B3 | B2 | B1 | BO |
---|---|---|---|---|---|---|---|---|
Bit name and function | DCDC_SQ2 | DCDC_SQ1 | DCDC_SQ0 | DCDC1 ENABLE | DCDC2 ENABLE | DCDC3 ENABLE | LDO1 ENABLE | LDO2 ENABLE |
Default for
–70, –72, -73, -732 |
See Table 10 | See Table 10 | See Table 10 | 1 | 1 | 1 | 1 | 1 |
Default for
TPS650731 |
See Table 10 | See Table 10 | See Table 10 | 1 | 1 | 1 | 1 | 0 |
Set by signal | DCDC1_ENZ | DCDC2_ENZ | DCDC3_ENZ | LDO_ENZ | LDO_ENZ | |||
Default value loaded by: | UVLO | UVLO | UVLO | UVLO | UVLO | UVLO | UVLO | UVLO |
Read/write | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W |
The CON_CTRL1 register can be used to disable and enable all power supplies through the serial interface. Default is to allow all supplies to be on, providing the relevant enable pin is high. The following tables indicate how the enable pins and the CON_CTRL1 register are combined. The CON_CTRL1 Bits are automatically reset to default when the corresponding enable pin is low.
Bit 7..5 | DCDC_SQ2 to DCDC_SQ0: power-up sequencing (power down sequencing is the reverse) |
000 = power-up sequencing is: DCDC2 only; DCDC1 and DCDC3 are not part of the automatic sequencing and are enabled by their enable pins EN_DCDC1 and EN_DCDC3 | |
001 = power-up sequencing is DCDC2 and DCDC3 at the same time, DCDC1 is not part of the automatic sequencing and is enabled by its enable pin EN_DCDC1 | |
010 = power-up sequencing is: DCDC1 when power good then DCDC2 and DCDC3 at the same time | |
011 = power-up sequencing is: DCDC3 when power good then DCDC2; DCDC1 is not part of the automatic sequencing and is controlled by its EN_DCDC1 pin. | |
100 = power-up sequencing is: DCDC3 is started at the same time with LDO2 if Bit MASK_EN_DCDC3 in register 0Eh is set (default is set). DCDC1 and DCDC2 are started at the same time when LDO2 is PGOOD (defined in LDO sequencing 111); DCDC3 is enabled or disabled with its EN_DCDC3 pin if MASK_EN_DCDC3 in register 0Eh is cleared (set =0). (Sirf PRIMA, start-up from OFF or start-up after SLEEP) | |
101 = DCDC converters are enabled individually with the external enable pins | |
110 = DCDC1first, when power good then DCDC2, when power good then DCDC3 | |
111 = power-up sequencing is: DCDC1 and DCDC2 at the same time >1ms after LDO2 has been started (defined in LDO sequencing 010); DCDC3 is not part of the automatic sequencing but is enabled with its EN_DCDC3 pin (Atlas4) |
In case of automatic sequencing other than 101, the start is initiated by going into ON-state. DCDC converters that are not part of the automatic sequencing can be enabled by pulling their enable pin to a logic HIGH level at any time in ON-state. The enable pins for the converters that are automatically enabled, should be tied to GND. For sequencing option DCDC_SEQ=111, the start is initiated by going into ON-state, however, the external LDO connected to pin EN_EXTLDO is powered first, followed by LDO2.
(The sequencing of LDO1 and LDO2 is defined in register LDO_CTRL1.)
EN_DCDC1 PIN | CON_CTRL1<4> | DCDC1 CONVERTER |
---|---|---|
0 | x | disabled |
1 | 0 | disabled |
1 | 1 | enabled |
EN_DCDC2 PIN | CON_CTRL1<3> | DCDC2 CONVERTER |
---|---|---|
0 | x | disabled |
1 | 0 | disabled |
1 | 1 | enabled |
EN_DCDC3 PIN | CON_CTRL1<2> | DCDC3 CONVERTER |
---|---|---|
0 | x | disabled |
1 | 0 | disabled |
1 | 1 | enabled |