STMicroelectronics LDL40

LDL40 is a high accuracy voltage regulator designed to be directly connected to a car battery in automotive applications or a generic battery used in industrial applications. Extended input voltage up to 40 V makes the device able to support a load dump transient, which is typical in automotive systems. Ultra-low quiescent current at light load increases the battery operation lifetime in always-on-standby systems. The device is stabilized with a small ceramic capacitor on the input and output. An enable logic control function puts the LDL40 in shutdown mode allowing a total current consumption lower than 0.3 µA. Thermal protection is also included. The device is available in automotive grade in a very small footprint DFN package with wettable flanks, allowing the maximum space saving in the PCB (printed circuit board) design and AOI (automated optical inspection).

Key features

• AEC-Q100 grade 1 qualified
• Operating temperature range: -40 °C < TJ < 150 °C
• Input voltage from 3.3 V to 40 V
• Dropout voltage (700 mV typ. at 200 mA load)
• Low ground current (2 μA typ. at no load)
• Output voltage: 3.3 V, 5.0 V, or ADJ from 1.2 V to 12 V
• Output voltage tolerance: ±2.5% overtemperature, 0.5% at 25 °C
• 200 mA guaranteed output current
• Power Good for fixed versions
• Logic-controlled electronic shutdown
• Internal current limit
• Thermal shutdown
• Output active discharge function
• DFN6 (2 x 2) WF package

Applications

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