TPS562200_16 Datasheet, PDF (13/32 Pages) Texas Instruments – 4.5-V To 17-V Input, 2-A, 3-A Synchronous Step-Down Voltage Regulator In 6 Pin SOT-23

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TPS562200, TPS563200
SLVSCB0D – JANUARY 2014 – REVISED JUNE 2016
Feature Description (continued)
When the overcurrent condition is removed, the output voltage returns to the regulated value.
7.3.5 Over Voltage Protection
TPS562200 and TPS563200 detect overvoltage condition by monitoring the feedback voltage (VFB). When the
feedback voltage becomes higher than 125% of the target voltage, the OVP comparator output goes high and
both the high-side MOSFET driver and the low-side MOSFET driver turn off. This function is non-latch operation.
7.3.6 UVLO Protection
Undervoltage lock out protection (UVLO) monitors the internal regulator voltage. When the voltage is lower than
UVLO threshold voltage, the device is shut off. This protection is non-latching.
7.3.7 Thermal Shutdown
The device monitors the temperature of itself. If the temperature exceeds the threshold value (typically 155°C),
the device is shut off. This is a non-latch protection
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
TPS562200 and TPS563200 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 TPS562200 and TPS563200 operate
at a quasi-fixed frequency of 650 kHz.
7.4.2 Eco-Mode Operation
When the TPS562200 and TPS563200 are in the normal CCM operating mode and the switch current falls to 0
A, the TPS562200 and TPS563200 begin 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 TPS562200 and TPS563200 are operating in either normal CCM or eco-mode, they may be placed in
standby by asserting the EN pin low.
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