LDO40L Voltage Regulator
STMicro's LDO40L AEC-Q100 qualified, ultra-low-dropout and low noise voltage regulator with wide input voltage range up to 38 V and quiescent current of 45 µA
STMicro's LDO40L is a 400 mA low dropout voltage regulator designed for use in severe automotive environments. Low quiescent current makes it suitable for applications permanently connected to a battery. This feature is especially critical when electronic modules remain in active mode when the ignition is off. The LDO40L embeds protection functions such as current limit and thermal shutdown. The extended input voltage range, low drop voltage, and low quiescent current features also make it suitable for low power industrial and consumer applications.
Features
- Low quiescent current: typ. 45 µA at no load
- Wide input voltage operating range up to 38 V
- Low startup voltage: 3.5 V
- Output current up to 400 mA
- Output voltage options: adj from 2.5 V; and fixed, 3 V, 3.3 V, 5 V, and 8.5 V
- High PSRR: 70 dB @ 1 kHz
- Very low noise: 20 µVRMS/VOUT
- Protection features: current limitation, thermal shutdown
- -40°C to +125°C operating temperature range
- Package: DFN6 (3x3) (wettable flanks)
- AEC-Q100 qualified (grade 1)
- Output voltage accuracy:
- ±1% typ. @ 25°C
- ±3% (including line, load, and temperature variation)
- Ultra-low dropout:
- 36 mV @ 100 mA load current
- 140 mV @ 400 mA load current
Applications
- Automotive applications
- Body control modules
- Instruments and clusters
- Automotive LED lighting