3A、可調節超低壓降穩壓器
| Output options | Adjustable Output |
| Iout (Max) (A) | 3 |
| Vin (Max) (V) | 5.5 |
| Vin (Min) (V) | 2.7 |
| Vout (Max) (V) | 5 |
| Vout (Min) (V) | 0.6 |
| Noise (uVrms) | 100 |
| Iq (Typ) (mA) | 2 |
| Thermal resistance θJA (°C/W) | 33 |
| Rating | Catalog |
| Load capacitance (Min) (μF) | 10 |
| Regulated outputs (#) | 1 |
| Accuracy (%) | 2 |
| PSRR @ 100 KHz (dB) | 25 |
| Dropout voltage (Vdo) (Typ) (mV) | 420 |
| Operating temperature range (C) | -40 to 125 |
- Input Voltage: 2.7 V to 5.5 V
- Adjustable Output Voltage: 0.6 V
to 5 V - FlexCap: Stable with Ceramic, Tantalum,
or Aluminum Capacitors - Stable With 10-μF Input and
Output Capacitors - Low Ground-Pin Current
- 25-nA Quiescent Current in Shutdown Mode
- Ensured Output Current of 3 A
- Ensured VADJ Accuracy of
±1.5% at 25°C (A Grade) - Ensured Accuracy of ±3.5% at
25°C (STD) - Overtemperature and Overcurrent Protection
- ENABLE (EN) Pin (LP38501 only)
- –40°C to +125°C Operating
Temperature Range
TI?s FlexCap low-dropout (LDO) linear regulators feature unique compensation that allow use of any type of output capacitor with no limits on minimum or maximum equivalent series resistance (ESR). The LP38501 and LP38503 series of LDOs operate from a 2.7-V to 5.5-V input supply. These ultra-low-dropout linear regulators respond very quickly to step changes in load, making them suitable for low-voltage microprocessor applications. Developed on a CMOS process (utilizing a PMOS pass transistor) the LP38501-ADJ and LP38503-ADJ have low quiescent currents that change little with load current.
- GND Pin Current: Typically 2 mA at 3-A load current.
- Disable Mode: Typically 25-nA quiescent current when the EN pin is pulled low.
- Simplified Compensation: Stable with any type of output capacitor, regardless of ESR.
- Precision Output: grade versions available with 1.5% VADJ tolerance (25°C) and 3% over line, load, and temperature.
