LDH40MR [STMicroelectronics]

LDH40 is a high accuracy voltage regulator designed to be directly connected to a car battery in automotive applications, or a generic battery connected in industrial applications. Extended input voltage up to 40 V makes the device capable to support a load dump transient, 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 LDH40 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 flank, allowing the maximum space saving in the PCB (printed circuit board) design and AOI (automated optical inspection).

• 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 (700 mV typ. at 200 mA load)
• Low ground current (2 μA typ. at no load)
• ADJ from 1.2 V to 22 V
• Output voltage tolerance: 0.5% at 25 °C
• 200 mA guaranteed output current
• Power Good
• Logic-controlled electronic shutdown
• Internal current limit
• Thermal shutdown
• Output active discharge function
• Package options:
  • DFN 2x2 6L WF for automotive grade
  • SOT23 5L and DFN 6L for industrial