Datasheet

Undervoltage Lockout (UVLO)
Thermal Shutdown
Overvoltage Prevention
TPS61086
SLVSA05 – AUGUST 2009 ................................................................................................................................................................................................ www.ti.com
For additional flexibility, it is possible to switch from Power Save Mode to Forced PWM Mode during operation.
This allows efficient power management by adjusting the operation of the converter to the specific system
requirements.
To avoid mis-operation of the device at low input voltages an undervoltage lockout is included that disables the
device, if the input voltage falls below 2.2 V.
A thermal shutdown is implemented to prevent damages due to excessive heat and power dissipation. Typically
the thermal shutdown happens at a junction temperature of 150 ° C. When the thermal shutdown is triggered the
device stops switching until the junction temperature falls below typically 136 ° C. Then the device starts switching
again.
If overvoltage is detected on the FB pin (typically 3 % above the nominal value of 1.238 V) the part stops
switching immediately until the voltage on this pin drops to its nominal value. This prevents overvoltage on the
output and secures the circuits connected to the output from excessive overvoltage.
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