LDO voltage regulator from STMicroelectronics packs big performance in tiny footprint

STMicroelectronics has released its STLQ020 low-dropout (LDO) voltage regulator which it says relieves the familiar trade-offs between quiescent current, output power, dynamic response, and package size, to give designers extra freedom.

STMicro says it has combined small size with high performance and energy efficiency, making its LDO voltage regulator suitable for use in battery-powered consumer products like smartphones and wearables.

The device is designed to help extend battery life in IoT endpoints, healthcare devices and industrial applications.

Drawing 300nA quiescent current (Iq) and is capable of supplying up to 200mA to the load with what STMicro describes as ‘excellent regulation, power-supply rejection (PSRR), and transient response’.

The STLQ020 is available in a choice of compact packages reaching as small as a 0.8mm x 0.8mm flip-chip4.

The STLQ020’s dedicated low-power design and adaptive bias circuitry is said to ensure a fast response and stable output with high PSRR. Dropout voltage as low as 160mV (typical) at maximum load also allows longer equipment runtimes as the battery discharges, STMicro adds.

With 5nA logic-controlled shutdown mode, the STLQ020 can also extend the interval between coin-cell replacements in low-duty-cycle applications like remote sensors.

The device has an input voltage range of 2.0V-5.5V, so it can be powered directly from a suitable battery voltage (VBAT) or logic rail. The output voltage can be set between 0.8V and 4.5V, with either fixed-output or adjustable-output versions available. The fixed output voltages are selectable in 50mV increments.

Bethan Grylls