1 Features
1• Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results
– Device Temperature Grade 1: –40°C to
+125°C Ambient Operating Temperature
Range
• Input Voltage Range: 2 V to 6 V
• 1% Voltage Accuracy at Room Temperature
• Output Voltage Range: 0.8 V to 3.3 V
• Output Current: 150 mA
• Logic Controlled Enable
• Thermal-Overload and Short-Circuit Protection
• Virtually Zero I Q (Disabled), < 10 nA
• Very Low IQ (Enabled): 43 μA
• Low Output Noise: 150 μVRMS
• PSRR: 55 dB at 1 kHz
• Fast Start-Up: 105 μs
• Stable with Ceramic Capacitor
• Output Stable - Capacitors, 1 μF
• No Noise Bypass Capacitor Required

2 Applications
• Infotainment
• Instrumentation
• Body Electronics

3 Description
The LP3990-Q1 regulator is designed to meet the
requirements of portable, battery-powered systems providing an accurate output voltage, low-noise, and
low-quiescent current. The LP3990-Q1 will provide a
0.8-V output from the low input voltage of 2 V at up to
a 150-mA load current. When switched into shutdown
mode via a logic signal at the enable pin (EN), the
power consumption is reduced to virtually zero.
The LP3990-Q1 is designed to be stable with spacesaving
ceramic capacitors with values as low as 1 μF.
Performance is specified for a –40°C to +125°C junction temperature range.
For output voltage options please refer to package
option addendum (POA) or contact the Texas
Instruments Sales Office.