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TPS561201, TPS561208

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SLVSC95 – APRIL 2017

Product Folder Links: TPS561201 TPS561208

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7.4 Device Functional Modes

7.4.1 Normal Operation

When the input voltage is above the UVLO threshold and the EN voltage is above the enable threshold, the

TPS561208 can operate in their normal switching modes. Normal continuous conduction mode (CCM) occurs

when the minimum switch current is above 0 A. In CCM, the TPS561208 operates at a quasi-fixed frequency of

580 kHz.

7.4.2 Eco-mode Operation

When the TPS561201 and TPS561208 are in the normal CCM operating mode and the switch current falls to 0

A, the TPS561201 begins operating in pulse skipping Eco-mode. Each switching cycle is followed by a period of

energy saving sleep time. The sleep time ends when the VFB voltage falls below the Eco-mode threshold

voltage. As the output current decreases, the perceived time between switching pulses increases.

7.4.3 Standby Operation

When the TPS561201 and TPS561208 are operating in either normal CCM or Eco-mode, they may be placed in

standby by asserting the EN pin low.