Datasheet

www.ti.com

Low Dropout Voltage Regulators

TPS65050, TPS65051, TPS65052

TPS65054, TPS65056

SLVS710A – JANUARY 2007 – REVISED AUGUST 2007

The low dropout voltage regulators are designed to operate well with small ceramic input and output capacitors.

They operate with input voltages down to 1.5 V. The LDOs offer a maximum dropout voltage of 280 mV at rated

output current. Each LDO supports a current limit feature. The LDOs are enabled by the EN_LDO1, ENLDO2,

EN_LDO3 and EN_LDO4 pin. In TPS65050 and TPS65052, the output voltage of the LDOs is set using 4 pins.

The DEFLDO1 to DEFLDO4 pins can either be connected to GND or Vbat (V

) to define a set of output

voltages for LDO1 to LDO4 according to table 1. Connecting the DEFLDOx pins to a voltage different from GND

or V

causes increased leakage current into V

. In TPS65051 and TPS65054, the output voltage of the LDOs

is set using external resistor dividers.

TPS65050 and TPS65052 default voltage options adjustable with DEFLDO4 … DEFLDO1 according to Table 1 .

Table 1. Default Options

DEFLDO1 DEFLDO2 DEFLDO3 DEFLDO4 VLDO1 VLDO2 VLDO3 VLDO4

400 mA LDO 400 mA LDO 200 mA LDO 200 mA LDO

1.8 V - 5.5 V 1.8 V - 5.5 V 1.5 V - 5.5 V 1.5 V - 5.5 V

Input Input Input Input

0 0 0 0 3.3 V 3.3 V 1.85 V 1.85 V

0 0 0 1 3.3 V 3.3 V 1.5 V 1.5 V

0 0 1 0 3.3 V 2.85 V 2.85 V 2.7 V

0 0 1 1 3.3 V 2.85 V 2.85 V 2.5 V

0 1 0 0 3.3 V 2.85 V 2.85 V 1.85 V

0 1 0 1 3.3 V 2.85 V 1.85 V 1.85 V

0 1 1 0 3.3 V 2.85 V 1.5 V 1.5 V

0 1 1 1 3.3 V 2.85 V 1.5 V 1.3 V

1 0 0 0 3.3 V 2.85 V 1.1 V 1.3 V

1 0 0 1 2.85 V 2.85 V 1.85 V 1.85 V

1 0 1 0 2.7 V 3.3 V 1.2 V 1.2 V

1 0 1 1 2.5 V 3.3 V 1.5 V 1.5 V

1 1 0 0 2.5 V 3.3 V 1.5 V 1.3 V

1 1 0 1 1.85 V 1.85 V 1.35 V 1.35 V

1 1 1 0 1.8 V 2.5 V 3.3 V 2.85 V

1 1 1 1 1.2 V 1.8 V 1.1 V 1.3 V

Product Folder Link(s): TPS65050, TPS65051, TPS65052 TPS65054, TPS65056