| Output options | Fixed Output |
| Iout (Max) (A) | 0.35 |
| Vin (Max) (V) | 4.5 |
| Vin (Min) (V) | 0.9 |
| Vout (Max) (V) | 2 |
| Vout (Min) (V) | 0.7 |
| Fixed output options (V) | 1, 1.2, 1.3, 1.5, 1.6, 1.8 |
| Noise (uVrms) | 100 |
| Iq (Typ) (mA) | 0.061 |
| Thermal resistance θJA (°C/W) | 181 |
| Rating | Catalog |
| Load capacitance (Min) (μF) | 2.2 |
| Regulated outputs (#) | 1 |
| Features | Enable |
| Accuracy (%) | 3 |
| PSRR @ 100 KHz (dB) | 38 |
| Dropout voltage (Vdo) (Typ) (mV) | 88, 128 |
| Operating temperature range (C) | -40 to 125 |
- Input Voltage Range: 0.7 V to 4.5 V
- 2.5 V ≤ VBATT ≤ 5.5 V
- 0.5V ≤ VOUT ≤ 2 V
- Ensured 350-mA Output Current
- For ILOAD = 350 mA:
- VBATT ≥ VOUT(NOM) + 1.5 V or 2.5 V
(Whichever is Higher)
- VBATT ≥ VOUT(NOM) + 1.5 V or 2.5 V
- For ILOAD = 150 mA:
- VBATT ≥ VOUT(NOM) + 1.3 V or 2.5 V
(Whichever is Higher)
- VBATT ≥ VOUT(NOM) + 1.3 V or 2.5 V
- Excellent Load Transient Response: ±15 mV Typical
- Excellent Line Transient Response: ±1 mV Typical
- 50-μA Typical Quiescent Current from VBATT
- 10-μA Typical Quiescent Current from VIN
- 0.1-μA Typical Quiescent Current in Shutdown
- Noise voltage = 100 μVRMS Typical
- Operates from a Single Li-Ion Cell or 3-Cell NiMH/NiCd Battery
- Thermal-Overload and Short-Circuit Protection
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 VBATT is directly connected to the battery (range 2.5 V to
5.5 V), and VIN 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. For availability, please contact your local Texas Instruments sales office.
For all available packages, see the orderable addendum at the end of the data sheet.