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

 

Recommended alternative parts

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

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

WEBENCH® Designer LP38853

  Min   Max Range
Vin  V 1.25 to 5.5V
Vout  V 0.8 to 1.8V
Iout  A ≤ 3A
Ambient Temp  °C -40 to 125°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)
LP38853 Order now Adjustable Output     3     5.5     1.04     1.8     0.8       DDPAK/TO-263 | 7
SO PowerPAD | 8
TO-220 | 7    
Enable
Soft Start    
1     -40 to 125     34     150     1.88 | 1ku     Catalog     35     2     240     10     7DDPAK/TO-263: 154 mm2: 15.24 x 10.1 (DDPAK/TO-263 | 7)
8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)
See datasheet (TO-220)    
LP38851 Order now Adjustable Output     0.8     5.5     0.915     1.8     0.8       DDPAK/TO-263 | 7
SO PowerPAD | 8
TO-220 | 7    
Enable
Soft Start    
1     -40 to 125     60     90     0.81 | 1ku     Catalog     50     2     115     10     7DDPAK/TO-263: 154 mm2: 15.24 x 10.1 (DDPAK/TO-263 | 7)
8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)
See datasheet (TO-220)    
LP38852 Order now Adjustable Output     1.5     5.5     0.93     1.8     0.8       DDPAK/TO-263 | 7
SO PowerPAD | 8
TO-220 | 7    
Enable
Soft Start    
1     -40 to 125     34     90     1.19 | 1ku     Catalog     35     3     130     10     7DDPAK/TO-263: 154 mm2: 15.24 x 10.1 (DDPAK/TO-263 | 7)
8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)
See datasheet (TO-220)    
LP38855 Order now Fixed Output     1.5     5.5     0.98     1.2     0.8     0.8
1.2    
DDPAK/TO-263 | 5
TO-220 | 5    
Enable     1     -40 to 125     60     150     0.97 | 1ku     Catalog     37     2     130     10     5DDPAK/TO-263: 155 mm2: 15.24 x 10.16 (DDPAK/TO-263 | 5)
See datasheet (TO-220)    
LP38856 Order now Fixed Output     3