Datasheet

PRODUCTPREVIEW

TPS65186

SLVSB04 –JULY 2011

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MODES OF OPERATION

The TPS65186 has three modes of operation, SLEEP, STANDBY, and ACTIVE. SLEEP mode is the

lowest-power mode in which all internal circuitry is turned off. In STANDBY, all power rails are shut down but the

device is ready to accept commands through the I

C interface. In ACTIVE mode one or more power rails are

enabled.

SLEEP

This is the lowest power mode of operation. All internal circuitry is turned off, registers are

reset to default values and the device does not respond to I

C communications. TPS65186

enters SLEEP mode whenever WAKEUP pin is pulled low.

STANDBY

In STANDBY all internal support circuitry is powered up and the device is ready to accept

commands through the I

C interface but none of the power rails are enabled. The device

enters STANDBY mode when the WAKEUP pin is pulled high and either the PWRUP pin is

pulled low or the STANDBY bit is set. The device also enters STANDBY mode if input Under

Voltage Lock Out (UVLO), positive boost Under Voltage (VB_UV), or inverting buck-boost

Under Voltage (VN_UV) is detected, thermal shutdown occurs, or the PROG bit is set (see

VCOM calibration).

ACTIVE

The device is in ACTIVE mode when any of the output rails are enabled and no fault

condition is present. This is the normal mode of operation while the device is powered up.

MODE TRANSISITONS

SLEEP → ACTIVE

WAKEUP pin is pulled high with PWRUP pin high. Rails come up in the order defined by the

UPSEQx registers (OK to tie WAKEUP and PWRUP pin together).

SLEEP → STANDBY

WAKEUP pin is pulled high with PWRUP pin low. Rails will remain powered down.

STANDBY → ACTIVE

WAKEUP pin is high and PWRRUP pin is pulled high (rising edge) or the ACTIVE bit is set.

Output rails will power up in the order defined by the UPSEQx registers.

ACTIVE → STANDBY

WAKEUP pin is high and STANDBY bit is set or PWRUP pin is pulled low (falling edge).

Rails are shut down in the order defined by DWNSEQx registers. Device also enters

STANDBY in the event of Thermal Shut Down (TSD), Under Voltage Lock Out (UVLO),

positive boost or inverting buck-boost Under Voltage (UV), VCOM fault (VCOMF), or when

the PROG bit is set (see VCOM calibration).

STANDBY → SLEEP

WAKEUP pin is pulled low while none of the output rails are enabled.

ACTIVE → SLEEP

WAKEUP pin is pulled low while at least one output rail is enabled. Rails are shut down in

the order defined by DWNSEQx registers.