TPS61253, TPS61254, TPS61256, TPS61258, TPS61259

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SLVSAG8E – SEPTEMBER 2011 – REVISED MARCH 2015

Device Functional Modes (continued)

Figure 27. Power Save

9.4.2 Standby Mode

The TPS6125x device is able to maintain its output biased at the input voltage level. In so called standby mode

(EN = 0, BP = 1), the synchronous rectifier is current limited to ca. 150mA allowing an external load (e.g. audio

amplifier) to be powered with a restricted supply. The output voltage is slightly reduced due to voltage drop

across the rectifier MOSFET and the inductor DC resistance. The device consumes only a standby current of 21

µA (typ).

Table 2. Operating Mode Control

OPERATING MODE

EN

BP

Shutdown, True Load Disconnect (SD)

0

0

Standby Mode, Output Pre-Biased (SM)

0

1

1

0

Boost Operating Mode (BST)

1

1

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