LDH40
LDH40 is 200mA low dropout LDO manufactured by STMicroelectronics.
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 m V typ. at 200 m A 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 m A 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
Applications
- EV powertrain
- Body control modules
- Always-on battery connected application
- Infotainment and instrument cluster
- ADAS
Description
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).
DS14147
- Rev 3
- March 2025 For further information, contact your local STMicroelectronics sales office.
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Diagram
Figure 1. Block diagram adjustable version
Current limit
Thermal protection
Enable
Driver
Power Good
Bandgap...
