LP38693 500mA Low Dropout CMOS Linear Regulators Stable with Ceramic Output Capacitors | TI.com

LP38693 (ACTIVE)

500mA Low Dropout CMOS Linear Regulators Stable with Ceramic Output Capacitors


Recommended alternative parts

  • TPS7A90  -  TPS7A90 is 500mA, low noise (4.7uVrms) LDO in a small package (2.5 mm x 2.5mm)


The LP3869x low-dropout CMOS linear regulators provide tight output tolerance (2% typical), extremely low dropout voltage (250 mV at 500-mA load current, VOUT = 5 V), and excellent AC performance using ultralow equivalent series resistance (ESR) ceramic output capacitors.

The low thermal resistance of the WSON, SOT-223, and TO-252 packages allow use of the full operating current even in high ambient temperature environments.

The use of a PMOS power transistor means that no DC base-drive current is required to bias it, thus allowing ground pin current to remain below 100 µA regardless of load current, input voltage, or operating temperature.

For all available packages, see the orderable addendum at the end of the data sheet.


  • Wide Input Voltage Range (2.7 V to 10 V)
  • All WSON Options are Available as AEC-Q100 Grade 1
  • 2% Output Accuracy (25°C)
  • Low Dropout Voltage: 250 mV at 500 mA (Typical,
    5 V Out)
  • Precision (Trimmed) Bandgap Reference
  • Ensured Specifications for –40°C to 125°C
  • 1-µA Off-State Quiescent Current
  • Thermal Overload Protection
  • Foldback Current Limiting
  • Ground Pin Current: 55 µA (typical) at full load
  • Enable Pin (LP38693)

WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer LP38693

  Min   Max Range
Vin  V 2.75 to 10.0V
Vout  V 1.8 to 5V
Iout  A ≤ 0.5A
Ambient Temp  °C -40 to 125°C


Compare all products in Linear regulators (LDO) Email Download to Excel
Part number Order Output options Iout (Max) (A) Vin (Max) (V) Vin (Min) (V) Vout (Max) (V) Vout (Min) (V) Fixed output options (V) Package Group Features Regulated outputs (#) Operating temperature range (C) Thermal resistance θJA (°C/W) Noise (uVrms) Approx. price (US$) Rating Output capacitor type PSRR @ 100 KHz (dB) Accuracy (%) Vdo (Typ) (mV) Iq (Typ) (mA) Package size: mm2:W x L (PKG)
LP38693 Order now Fixed Output     0.5     10     2.7     5     1.8     1.8
SOT-223 | 5
WSON | 6    
Foldback Overcurrent Protection    
1     -40 to 125     51     80     0.50 | 1ku     Catalog     Ceramic     50     4     250     0.055     5SOT-223: 45 mm2: 6.96 x 6.5 (SOT-223 | 5)
See datasheet (WSON)