LP38841 0.8A Ultra Low Dropout Linear Regulators | TI.com

LP38841
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0.8A Ultra Low Dropout Linear Regulators

 

Description

The LP38841 is a high current, fast response regulator which can maintain output voltage regulation with minimum input to output voltage drop. Fabricated on a CMOS process, the device operates from two input voltages: Vbias provides voltage to drive the gate of the N-MOS power transistor, while Vin is the input voltage which supplies power to the load. The use of an external bias rail allows the part to operate from ultra low Vin voltages. Unlike bipolar regulators, the CMOS architecture consumes extremely low quiescent current at any output load current. The use of an N-MOS power transistor results in wide bandwidth, yet minimum external capacitance is required to maintain loop stability.

The fast transient response of these devices makes them suitable for use in powering DSP, Microcontroller Core voltages and Switch Mode Power Supply post regulators. The parts are available in TO-220 and DDPAK/TO-263 packages.

Dropout Voltage: 75 mV (typ) at 0.8A load current.

Quiescent Current: 30 mA (typ) at full load.

Shutdown Current: 30 nA (typ) when S/D pin is low.

Precision Output Voltage: 1.5% room temperature accuracy.

Features

  • Ideal for Conversion from 1.8V or 1.5V Inputs
  • Designed for Use with low ESR Ceramic Capacitors
  • 0.8V, 1.2V and 1.5V Standard Voltages Available
  • Ultra Low Dropout Voltage (75mV at 0.8A typ)
  • 1.5% Initial Output Accuracy
  • Load Regulation of 0.1%/A (typical)
  • 30nA Quiescent Current in Shutdown (typical)
  • Low Ground Pin Current at all Loads
  • Over Temperature/over Current Protection
  • Available in 5 Lead TO-220 and DDPAK/TO-263 Packages
  • −40°C to +125°C Junction Temperature Range

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WEBENCH® Designer LP38841

  Min   Max Range
Vin  V 0.875 to 5.5V
Product Option
Vout  V
Iout  A ≤ 0.8A
Ambient Temp  °C -40.0 to 125.0°C

Parametrics

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 PSRR @ 100 KHz (dB) Accuracy (%) Dropout voltage (Vdo) (Typ) (mV) Iq (Typ) (mA) Package size: mm2:W x L (PKG)
LP38841 Order now Fixed Output     0.8     5.5     0.875     1.5     0.8     0.8
1.2
1.5    
DDPAK/TO-263 | 5
TO-220 | 5
TO-220 | 5    
Enable     1     -40 to 125     35     90     0.81 | 1ku     Catalog     28     3     75     32     5DDPAK/TO-263: 155 mm2: 15.24 x 10.16 (DDPAK/TO-263 | 5)
5TO-220: 86 mm2: 8.47 x 10.16 (TO-220 | 5)
5TO-220: 86 mm2: 8.51 x 10.16 (TO-220 | 5)    
LP38842 Order now Fixed Output     1.5     5.5     0.915     1.5     0.8     0.8
1.2
1.5    
DDPAK/TO-263 | 5
TO-220 | 5    
Enable     1     -40 to 125     35     90     1.08 | 1ku     Catalog     29     2     115     32     5DDPAK/TO-263: 155 mm2: 15.24 x 10.16 (DDPAK/TO-263 | 5)
5TO-220: 86 mm2: 8.51 x 10.16 (TO-220 | 5)    
LP38843 Samples not available Fixed Output     3     5.5     1.01     1.5     0.8     0.8
1.2
1.5    
DDPAK/TO-263 | 5
TO-220 | 5    
Enable     1     -40 to 125     35     90     1.71 | 1ku     Catalog     29     2     210     32     5DDPAK/TO-263: 155 mm2: 15.24 x 10.16 (DDPAK/TO-263 | 5)
5TO-220: 86 mm2: 8.51 x 10.16 (TO-220 | 5)