LP5952TLX-1.5/NOPB

The LP5952 is a dual-supply-rail linear regulator optimized for powering ultralow-voltage circuits from a single Li-Ion cell or 3-cell NiMH/NiCd battery. In the typical post-regulation application V_BATT is directly connected to the battery (range 2.5 V to 5.5 V), and V_IN is supplied by the output voltage of the DC-DC converter (range 0.7 V to 4.5 V). The device offers superior dropout and transient features combined with very low quiescent currents. In shutdown mode (Enable (EN) pin pulled low) the device turns off and reduces battery consumption to 0.1 μA (typical). The LP5952 also features internal protection against overtemperature, overcurrent, and undervoltage conditions. Depending upon application, only one or two tiny surface-mount external components are required; performance is specified for a -40°C to +125°C junction temperature range. The device is available in fixed output voltages from 0.5 V to 2 V.

Applications

• Mobile Phones
• Hand-Held Radios
• Personal Digital Assistants
• Palm-Top PCs
• Portable Instruments
• Battery-Powered Devices

Key features

• Input Voltage Range: 0.7 V to 4.5 V, 2.5 V ≤ V_BATT ≤ 5.5 V, 0.5 V ≤ V_OUT ≤ 2 V
• Ensured 350-mA Output Current: For I_LOAD = 350 mA; V_BATT ≥ V_OUT(NOM) + 1.5 V or 2.5 V (Whichever is Higher); For I_LOAD = 150 mA; V_BATT ≥ V_OUT(NOM) + 1.3 V or 2.5 V (Whichever is Higher)
• Excellent Load Transient Response: ±15 mV Typical
• Excellent Line Transient Response: ±1 mV Typical
• 50 μA Typical Quiescent Current from V_BATT
• 10 μA Typical Quiescent Current from V_IN
• 0.1 μA Typical Quiescent Current in Shutdown
• Noise voltage = 100 μV RMS Typical
• Operates from a Single Li-Ion Cell or 3-Cell NiMH/NiCd Battery
• Thermal-Overload and Short-Circuit Protection