STMicroelectronics LDQ40

The LDQ40 is a high accuracy voltage regulator, which provides 250 mA of current. It is available in an SOT23 5L, DFN 2x2 6L package, to maximize space saving.

The device is stabilized with a small ceramic capacitor on the output. The low drop, low quiescent current, and short-circuit protection make the LDQ40 suitable for low-power battery-operated applications.

An enable logic control function puts the LDQ40 in shutdown mode allowing a total current consumption lower than 0.3 µA. Thermal protection is also included.

Features

• AEC-Q100 grade 1 qualified
  • Operating temperature range: -40 °C < T_J < 150 °C
• Input voltage from 3.3 V to 40 V
• Dropout voltage (500 mV typ. at 250 mA load)
• Low ground current (2 μA typ. at no load)
• Output voltage: 1.8 V, 2.5 V, 3.3 V, and 5.0 V and ADJ from 1.2 V to 12 V
• Output voltage tolerance: ±1.5% overtemperature, ±0.5% at 25 °C
• 250 mA guaranteed output current
• Power Good for fixed versions
• Logic-controlled electronic shutdown
• Internal current limit
• Short-circuit protection
• Thermal shutdown
• Output active discharge function
• Package options:
  • SOT23-5L, DFN 2x2 6L for industrial applications
  • DFN 2x2 6L WF for automotive grade

Applications

• EV powertrain
• Always-on battery connected application
• Infotainment and instrument cluster
• ADAS