STMicroelectronics LDK120

The LDK120 low drop voltage regulator provides 200 mA of maximum current from an input supply voltage in the range of 1.9 V to 5.5 V, with a typical dropout voltage of 100 mV. It is stabilized with a ceramic capacitor on the output. The very low drop voltage, low quiescent current and low noise features make it suitable for low power battery-powered applications. An enable logic control function puts the LDK120 in shutdown mode allowing a total current consumption lower than 1 μA. The device also includes a short-circuit constant current limiting and thermal protection.

Key features

• Input voltage from 1.9 to 5.5 V
• Very low dropout voltage (100 mV typ. at 100 mA load)
• Low quiescent current (max. 100 µA, 1 µA in OFF mode)
• Very low noise
• Output voltage tolerance: ± 2.0% @ 25 °C
• 200 mA guaranteed output current
• Wide range of fixed output voltages available on request: from 0.8 V to 3.5 V with 100 mV step
• Adjustable version: from 0.8 V to V_IN-V_drop
• Logic-controlled electronic shutdown
• Compatible with ceramic capacitor C_OUT = 1 µF
• Internal current and thermal limit
• Available in SOT23-5L, SOT323-5L and DFN6 (1.2 x 1.3 mm) packages
• Temperature range: -40 °C to 125 °C

Applications

• Mobile phones
• Personal digital assistants (PDAs)
• Cordless phones and similar battery-powered systems
• Digital still cameras

Available tools

STDES-USBPWRMT1:

USB Type-C power meter reference design based on TSZ122, LDK120,ST715, and STM32

The STDES-USBPWRMT1 is a measurement device that can be inserted between a USB Type-C™ power source and a USB Type-C™ power sink device. The STDES-USBPWRMT1 power meter includes a USB Type-C™ receptacle connector on one side and a USB Type-C™ plug on the other side.

Data brief