LP5907 datasheet(12/50 Pages) TI2

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6.3.4 Remote Output Capacitor Placement

The LP5907 requires at least a 1µF capacitor at the OUT pin, but there are no strict requirements about the

location of the capacitor in regards the OUT pin. In practical designs, the output capacitor can be located up to

10cm away from the LDO.

6.3.5 Thermal Overload Protection (TSD)

Thermal shutdown disables the output when the junction temperature rises to approximately 160°C, which

allows the device to cool. When the junction temperature cools to approximately 145°C, the output circuitry

enables. Based on power dissipation, thermal resistance, and ambient temperature, the thermal protection circuit

can cycle on and off. This thermal cycling limits the dissipation of the regulator, and protects the regulator from

damage as a result of overheating.

The thermal shutdown circuitry of the LP5907 is designed to protect against temporary thermal overload

conditions. The TSD circuitry is not intended to replace proper heat-sinking. Continuously running the LP5907

into thermal shutdown can degrade device reliability.

6.4 Device Functional Modes

6.4.1 Enable (EN)

The LP5907 enable (EN) pin is internally held low by a 1MΩ resistor to GND. The EN pin voltage must be higher

than the VIH threshold to make sure that the device is fully enabled under all operating conditions.

When the EN pin is pulled low, and the output is disabled, the output automatic discharge circuitry is activated.

Any charge on the OUT pin is discharged to GND through the internal 230Ω (typical) pulldown resistance.

6.4.2 Minimum Operating Input Voltage (VIN)

The LP5907 does not include any dedicated UVLO circuitry. The LP5907 internal circuitry is not fully functional

until VIN is at least 2.2V. The output voltage is not regulated until VIN has reached at least the greater of 2.2V or

(VOUT + VDO).

LP5907

SNVS798Q – APRIL 2012 – REVISED JULY 2025

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