LP38855 具有启用的 1.5A 快速响应高分辨率 LDO 线性稳压器 | 德州仪器 TI.com.cn

LP38855 (正在供货)

具有启用的 1.5A 快速响应高分辨率 LDO 线性稳压器

具有启用的 1.5A 快速响应高分辨率 LDO 线性稳压器 - LP38855
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描述

The LP38855 is a high-current, fast-response regulator which can maintain output voltage regulation with an extremely low input to output voltage drop. Fabricated on a CMOS process, the device operates from two input voltages: VBIAS provides power for the internal bias and control circuits, as well as drive for the gate of the N-MOS power transistor, while VIN 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 this device makes it suitable for use in powering DSP, Microcontroller Core voltages and Switch Mode Power Supply post regulators. The LP38855 is available in TO-220 and DDPAK/TO-263 5-Lead packages.

Dropout Voltage: 130 mV (typical) at 1.5A load current.

Low Ground Pin Current: 10 mA (typical) at 1.5A load current.

Shutdown Current: 1 µA (typical) IIN(GND) when EN pin is low.

Precision Output Voltage: ±1.0% for TJ = 25°C and ±2.0% for 0°C ≤ TJ ≤ +125°C, across all line and load conditions

特性

  • Standard VOUT Values of 0.8V and 1.2V
  • Wide VBIAS Supply Operating Range of 3.0V to 5.5V
  • Stable with 10 µF Ceramic Capacitors
  • Dropout Voltage of 130 mV (Typical) at 1.5A Load Current
  • Precision Output Voltage Across All Line and Load Conditions:
    • ±1.0% for TJ = 25°C
    • ±2.0% for 0°C ≤ TJ ≤ +125°C
    • ±3.0% for -40°C ≤ TJ ≤ +125°C
  • Over-Temperature and Over-Current Protection
  • Available in 5 Lead TO-220 and DDPAK/TO-263 Packages
  • Custom VOUT Values between 0.8V and 1.2V are Available
  • -40°C to +125°C Operating Temperature Range

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参数 与其它产品相比 线性稳压器(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)
LP38855 LP38851 LP38852 LP38853 LP38856 LP38858 LP38859
Fixed Output     Adjustable Output     Adjustable Output     Adjustable Output     Fixed Output     Fixed Output     Fixed Output    
1.5     0.8     1.5     3     3     1.5     3    
5.5     5.5     5.5     5.5     5.5     5.5     5.5    
0.98     0.915     0.93     1.04     1.15     0.98     1.15    
1.2     1.8     1.8     1.8     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 | 5
TO-220 | 5    
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    
Enable     Enable
Soft Start    
Enable
Soft Start    
Enable
Soft Start    
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    
60     60     34     34     32     60     43    
150     90     90     150     150     150     150    
0.97 | 1ku     0.81 | 1ku     1.19 | 1ku     1.88 | 1ku     1.82 | 1ku     0.97 | 1ku     1.82 | 1ku    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
Ceramic     Ceramic     Ceramic     Ceramic     Ceramic     Ceramic     Ceramic    
37     50     35     35     37     37     37    
2     2     3     2     1     1     1