Pinout
Specifications| Output Current | 3000 mA |
| Output Min | 0.6 Volt |
| Input Min Voltage | 2.7 Volt |
| Input Max Voltage | 5.5 Volt |
| Dropout Voltage | 0.42 Volt |
| Adjustable Output | Yes |
| Quiescent Current | 2 mA |
| PSRR | 58 dB |
| Voltage Noise (rms) | 100 uV |
| Ceramic Capacitors Stable | Yes |
| Feedback Tolerance | 3.5 % |
| On/Off Pin | No |
| Error Flag | No |
| RegType | LDO |
| Temperature Min | -40 deg C |
| Temperature Max | 125 deg C |
| Special Features | FlexCap LDO |
| Output Max | 5 Volt |
| Feedback Voltage | 0.6 Volt |
| View Using Catalog |
DescriptionNational's FlexCap LDO's feature unique compensation that allows the use of any type of output capacitor with no limits on minimum or maximum ESR. The LP38503-ADJ series of low-dropout linear regulators operates from a +2.7V to +5.5V input supply. These ultra low dropout linear regulators respond very quickly to step changes in load, which makes them suitable for low voltage microprocessor applications. Developed on a CMOS process, (utilizing a PMOS pass transistor), the LP38503-ADJ has low quiescent current that changes little with load current.
Ground Pin Current: Typically 2 mA at 3A load current.
Disable Mode: Typically 25 nA quiescent current when the Enable pin is pulled low.
Simplified Compensation: Stable with any type of output capacitor, regardless of ESR.
Precision Output: "A" grade versions available with 1.5% VADJ tolerance (25°C) and 3% over line, load and temperature.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
| LP38503ATJ-ADJ |
CMOS7 |
0 |
16561 |
0 |
0 |
954000 |
4 |
270700104 |
| LP38503TJ-ADJ |
CMOS7 |
0 |
16561 |
0 |
0 |
954000 |
4 |
270700104 |
| LP38503TS-ADJ |
CMOS7 |
0 |
16561 |
0 |
0 |
954000 |
4 |
270700104 |
| LP38503TSX-ADJ |
CMOS7 |
0 |
16561 |
0 |
0 |
954000 |
4 |
270700104 |
Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.For more information on Reliability Metrics, please click here.
LP38503-ADJ Data Sheet
