Features: *Simple to use, few external components
*Ultra-small mini SO-8 package
*1.5% (A grade) precision output voltage
*Low-power shutdown input
*< 1 µA in shutdown
*Low operating current (180 µA typical @ VIN = 5V)
*Wide supply voltage range (1.8V to 24V)
*Built-in current limit amplifier
*Overtemperature protection
*12V, 5V, and 3.3V standard output voltages
*Can be programmed using external divider
*−40°C to +125°C junction temperature rangeApplication*High-current 5V to 3.3V regulator
*Post regulator for switching converter
*Current-limited switch
Specifications
| Output Current |
Undefined mA |
| Output Min |
1.24 Volt |
| Input Min Voltage |
1.8 Volt |
| Input Max Voltage |
24 Volt |
| Dropout Voltage |
Undefined Volt |
| Adjustable Output |
Yes |
| Quiescent Current |
0.18 mA |
| On/Off Pin |
Yes |
| Error Flag |
No |
| RegType |
LDO |
| Temperature Min |
-40 deg C |
| Temperature Max |
125 deg C |
| Special Features |
LDO Controller |
| Output Voltage |
3.3, 12, 5 Volt |
| Output Max |
24 Volt |
| View Using Catalog |
DescriptionA high-current LDO regulator is simple to design with the LP2975 LDO Controller. Using an external P-FET, the LP2975 will deliver an ultra low dropout regulator with extremely low quiescent current.
High open loop gain assures excellent regulation and ripple rejection performance.
The trimmed internal bandgap reference provides precise output voltage over the entire operating temperature range.
Dropout voltage is "user selectable" by sizing the external FET: the minimum input-output voltage required for operation is the maximum load current multiplied by the RDS(ON) of the FET.
Overcurrent protection of the external FET is easily implemented by placing a sense resistor in series with VIN. The 57 mV detection threshold of the current sense circuitry minimizes dropout voltage and power dissipation in the resistor.
The standard product versions available provide output voltages of 12V, 5V, or 3.3V with guaranteed 25°C accuracy of 1.5% ("A" grade) and 2.5% (standard grade).
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
| LP2975AI5.0 MDA |
LB250 |
0 |
18835 |
0 |
0 |
1705000 |
3 |
483798405 |
| LP2975AI5.0 MWA |
LB250 |
0 |
18835 |
0 |
0 |
1705000 |
3 |
483798405 |
| LP2975AIMM-3.3 |
LB250 |
0 |
18835 |
0 |
0 |
1705000 |
3 |
483798405 |
| LP2975AIMM-5.0 |
LB250 |
0 |
18835 |
0 |
0 |
1705000 |
3 |
483798405 |
| LP2975AIMMX-3.3 |
LB250 |
0 |
18835 |
0 |
0 |
1705000 |
3 |
483798405 |
| LP2975AIMMX-5.0 |
LB250 |
0 |
18835 |
0 |
0 |
1705000 |
3 |
483798405 |
| LP2975IMM-3.3 |
LB250 |
0 |
18835 |
0 |
0 |
1705000 |
3 |
483798405 |
| LP2975IMM-5.0 |
LB250 |
0 |
18835 |
0 |
0 |
1705000 |
3 |
483798405 |
| LP2975IMMX-3.3 |
LB250 |
0 |
18835 |
0 |
0 |
1705000 |
3 |
483798405 |
| LP2975IMMX-5.0 |
LB250 |
0 |
18835 |
0 |
0 |
1705000 |
3 |
483798405 |
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.
LP2975 Data Sheet
