LP38853 3A Fast-Response High-Accuracy Adjustable LDO Linear Regulator with Enable and Soft-Start | TI.com

LP38853 (ACTIVE)

3A Fast-Response High-Accuracy Adjustable LDO Linear Regulator with Enable and Soft-Start

3A Fast-Response High-Accuracy Adjustable LDO Linear Regulator with Enable and Soft-Start - LP38853
 

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Description

The LP38853 is a high-current, fast-response regulator that can maintain output voltage regulation with extremely low 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 NMOS power transistor; VIN is the input voltage which supplies power to the load. The use of an external bias rail allows the device 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 NMOS power transistor results in wide bandwidth, yet minimum external capacitance is required to maintain loop stability.

The fast transient response of this device makes it suitable for use in powering DSP and microcontroller core voltages, and switch-mode power-supply post regulators. Dropout Voltage: 240 mV (typical) at 3-A load current Low Ground Pin Current: 10 mA (typical) at 3-A load currentSoft Start: Programmable soft-start time

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

Features

  • Wide VBIAS Supply Operating Range: 3 V to 5.5 V
  • Adjustable VOUT Range: 0.8 V to 1.8 V
  • Dropout Voltage of 240 mV (Typical) at 3-A Load Current
  • Precision VADJ Across All Line and Load Conditions:
    • ±1.5% VADJ for TJ = 25°C
    • ±2% VADJ for 0°C ≤ TJ ≤ +125°C
    • ±3% VADJ for –40°C ≤ TJ ≤ +125°C
  • Overtemperature and Overcurrent Protection
  • Stable with 10-µF Ceramic Capacitors
  • −40°C to +125°C Operating Junction Temperature Range

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Parametrics Compare all products in Linear regulators (LDO)

 
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 @ 100KHz (dB)
Accuracy (%)
Vdo (Typ) (mV)
Iq (Typ) (mA)
Package Size: mm2:W x L (PKG)
LP38853 LP38851 LP38852 LP38855 LP38856 LP38858 LP38859
Adjustable Output     Adjustable Output     Adjustable Output     Fixed Output     Fixed Output     Fixed Output     Fixed Output    
3     0.8     1.5     1.5     3     1.5     3    
5.5     5.5     5.5     5.5     5.5     5.5     5.5    
1.04     0.915     0.93     0.98     1.15     0.98     1.15    
1.8     1.8     1.8     1.2     1.2     1.2     1.2    
0.8     0.8     0.8     0.8     0.8     1.2     0.8    
      0.8
1.2    
0.8
1.2    
1.2     0.8
1.2    
DDPAK/TO-263 | 7
SO PowerPAD | 8
TO-220 | 7    
DDPAK/TO-263 | 7
SO PowerPAD | 8
TO-220 | 7    
DDPAK/TO-263 | 7
SO PowerPAD | 8
TO-220 | 7    
DDPAK/TO-263 | 5
TO-220 | 5    
DDPAK/TO-263 | 5
TO-220 | 5    
DDPAK/TO-263 | 5
TO-220 | 5    
DDPAK/TO-263 | 5
TO-220 | 5    
Enable
Soft Start    
Enable
Soft Start    
Enable
Soft Start    
Enable     Enable     Soft Start     Soft Start    
1     1     1     1     1     1     1    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
34     60     34     60     32     60     43    
150     90     90     150     150     150     150    
1.88 | 1ku     0.81 | 1ku     1.19 | 1ku     0.97 | 1ku     1.82 | 1ku     0.97 | 1ku     1.82 | 1ku    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
Ceramic     Ceramic     Ceramic     Ceramic     Ceramic     Ceramic     Ceramic    
35     50     35     37     37     37     37    
2     2     3     2     1     1     1