Low-Dropout Regulator for Portable Devices
Created: Friday, 24 February 2012
The TLV710 and TLV711 series of dual, low-dropout (LDO) linear regulators from Texas Instruments (Dallas, TX) are low quiescent current devices with excellent line and load transient performance. These LDOs are designed for power-sensitive applications. These devices provide a typical accuracy of 2% over temperature.
The TLV711 series provides an active pulldown circuit to quickly discharge the outputs. The devices have pull-down resistors at the EN pins. This design helps in disabling the device when the signal-driving EN pins are in a weak, indeterminate state (for example, the GPIO of a processor that might be three-stated during startup). The pull-down resistor pulls the voltage to the EN pins down to 0-V, thus disabling the device.