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V5IN Undervoltage Lockout (UVLO) Protection

V5IN Input Capacitor

Thermal Shutdown

TPS51116

SLUS609A – MAY 2004 – REVISED JUNE 2004

DETAILED DESCRIPTION (continued)

TPS51116 has V5IN undervoltage lock out protection (UVLO). When the V5IN voltage is lower than UVLO

threshold voltage, SMPS, VTTLDO and VTTREF are shut off. This is a non-latch protection.

Add a ceramic capacitor with a value between 1.0 µF and 4.7 µF placed close to the V5IN pin to stabilize 5 V

from any parasitic impedance from the supply.

TPS51116 monitors the temperature of itself. If the temperature exceeds the threshold value, 160

°C (typ),

SMPS, VTTLDO and VTTREF are shut off. This is a non-latch protection and the operation is resumed when the

device is cooled down by about 10

°C.

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