LP38859 具有软启动的 3A 快速响应高分辨率 LDO 线性稳压器 | 德州仪器 TI.com.cn

LP38859 (正在供货)

具有软启动的 3A 快速响应高分辨率 LDO 线性稳压器

具有软启动的 3A 快速响应高分辨率 LDO 线性稳压器 - LP38859
 

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描述

The LP38859 is a high-current, fast-response regulator which 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 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 this device makes it suitable for use in powering DSP microcontroller core voltages and switch-mode power-supply post-regulators. The LP38859 is available in 5-pin TO-220 and DDPAK/TO-263 packages.

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

特性

  • Input Voltage: 1.1 V to 5.5 V
  • Wide VBIAS Supply Operating Range: 3 V to 5.5 V
  • Standard VOUT Values: 0.8 V and 1.2 V
  • Stable With 10-µF Ceramic Capacitors
  • Dropout Voltage of 240 mV (typical) at 3-A Load Current
  • Programmable Soft-Start Time
  • Precision Output Voltage Across All Line and Load Conditions:
    • ±1% VOUT for TJ = 25°C
    • ±2% VOUT for 0°C ≤ TJ ≤ +125°C
    • ±3% VOUT for –40°C ≤ TJ ≤ +125°C
  • Overtemperature and Overcurrent Protection
  • Operating Temperature Range: −40°C to +125°C

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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)
LP38859 LP38851 LP38852 LP38853 LP38855 LP38856 LP38858
Fixed Output     Adjustable Output     Adjustable Output     Adjustable Output     Fixed Output     Fixed Output     Fixed Output    
3     0.8     1.5     3     1.5     3     1.5    
5.5     5.5     5.5     5.5     5.5     5.5     5.5    
1.15     0.915     0.93     1.04     0.98     1.15     0.98    
1.2     1.8     1.8     1.8     1.2     1.2     1.2    
0.8     0.8     0.8     0.8     0.8     0.8     1.2    
0.8
1.2    
      0.8
1.2    
0.8
1.2    
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    
Soft Start     Enable
Soft Start    
Enable
Soft Start    
Enable
Soft Start    
Enable     Enable     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    
43     60     34     34     60     32     60    
150     90     90     150     150     150     150    
1.82 | 1ku     0.81 | 1ku     1.19 | 1ku     1.88 | 1ku     0.97 | 1ku     1.82 | 1ku     0.97 | 1ku    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
Ceramic     Ceramic     Ceramic     Ceramic     Ceramic     Ceramic     Ceramic    
37     50     35     35     37     37     37    
1     2     3     2     2     1     1