LP38511 800 mA Fast-Transient Response Low-Dropout Linear Voltage Regulator with Error Flag | TI.com

LP38511 (ACTIVE) 800 mA Fast-Transient Response Low-Dropout Linear Voltage Regulator with Error Flag



The LP38511-1.8 Fast-Transient Response Low-Dropout Voltage Regulator offers the highest-performance in meeting AC and DC accuracy requirements for powering Digital Cores. The LP38511-1.8 uses a proprietary control loop that enables extremely fast response to change in line conditions and load demands. Output Voltage DC accuracy is specified at ±2.5% over line, load and full temperature range from -40°C to +125°C. The LP38511-1.8 is designed for inputs from the 2.5V, 3.3V, and 5.0V rail, is stable with 10uF ceramic capacitors, and has a fixed 1.8V output. An Error Flag feature monitors the output voltage and notifies the system processor when the output voltage falls more than 15% below the nominal value. The LP38511-1.8 provides excellent transient performance to meet the demand of high performance digital core ASICs, DSPs, and FPGAs found in highly-intensive applications such as servers, routers/switches, and base stations.


  • 2.25V to 5.5V Input Voltage Range
  • 1.8V Fixed Output Voltage
  • 800 mA Output Load Current
  • +/- 2.5% VOUT Accuracy over Line, Load, and Full-Temperature Range from -40°C to +125°C
  • Stable with tiny 10 µF Ceramic Capacitors
  • 0.20% Output Voltage Load Regulation from 10 mA to 800 mA
  • Enable pin
  • Error Flag Indicates Status of Output Voltage
  • 1 µA of Quiescent Current in Shutdown
  • 40dB of PSRR at 100 kHz
  • Over-Temperature and Over-Current Protection
  • DDPAK/TO-263 and PFM Surface Mount Packages

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  Min   Max Range
Vin  V 2.25 to 5.5V
Vout  V 1.8 to 1.8V
Iout  A ≤ 0.8A
Ambient Temp  °C -40 to 125°C


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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 PSRR @ 100 KHz (dB) Accuracy (%) Dropout voltage (Vdo) (Typ) (mV) Iq (Typ) (mA) Package size: mm2:W x L (PKG)
LP38511 Order now Fixed Output     0.8     5.5     2.25     1.8     1.8     1.8     DDPAK/TO-263 | 5
TO-263 | 5    
Power Good    
1     -40 to 125     60     75     0.68 | 1ku     Catalog     42     2     260     7.5     5DDPAK/TO-263: 155 mm2: 15.24 x 10.16 (DDPAK/TO-263 | 5)
5TO-263: 142 mm2: 14.01 x 10.16 (TO-263 | 5)