REG1117 1A Low Dropout Positive Regulator | TI.com

REG1117 (ACTIVE)

1A Low Dropout Positive Regulator

 

Description

The REG1117 is a family of easy-to-use three-terminal voltage regulators. The family includes a variety of fixed-and adjustable-voltage versions, two currents (800mA and 1A) and two package types (SOT-223 and DDPAK). See the chart below for available options.

Output voltage of the adjustable versions is set with two external resistors. The REG1117 low dropout voltage allows its use with as little as 1V input-output voltage differential.

Laser trimming assures excellent output voltage accuracy without adjustment. An NPN output stage allows output stage drive to contribute to the load current for maximum efficiency.

Features

  • FIXED AND ADJUSTABLE VERSIONS
  • 2.85V MODEL FOR SCSI-2 ACTIVE TERMINATION
  • OUTPUT CURRENT:
         REG1117: 800mA max
         REG1117A: 1A max
  • OUTPUT TOLERANCE: ±1% max
  • DROPOUT VOLTAGE:
         REG1117: 1.2V max at IO = 800mA
         REG1117A: 1.3V max at IO = 1A
  • INTERNAL CURRENT LIMIT
  • THERMAL OVERLOAD PROTECTION
  • SOT-223 AND DDPAK SURFACE-MOUNT PACKAGES
  • APPLICATIONS
    • SCSI-2 ACTIVE TERMINATION
    • HAND-HELD DATA COLLECTION DEVICES
    • HIGH EFFICIENCY LINEAR REGULATORS
    • BATTERY POWERED INSTRUMENTATION
    • BATTERY MANAGEMENT CIRCUITS FOR NOTEBOOK AND PALMTOP PCs
    • CORE VOLTAGE SUPPLY: FPGA, PLD, DSP, CPU

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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 @ 100 KHz (dB)
Accuracy (%)
Vdo (Typ) (mV)
Iq (Typ) (mA)
Package size: mm2:W x L (PKG)
REG1117 REG1117A
Adjustable Output
Fixed Output    
Adjustable Output
Fixed Output    
0.8     1    
15     15    
3.7     3.7    
13.8     13.8    
1.25     1.25    
2.5
2.8
2.85
3
3.3
5    
1.8
2.5
5    
DDPAK/TO-263 | 3
SOT-223 | 4    
DDPAK/TO-263 | 3
SOT-223 | 4    
   
   
1     1    
0 to 125     0 to 125    
65     65    
38     38    
0.77 | 1ku     0.85 | 1ku    
Catalog     Catalog    
Non-Ceramic     Non-Ceramic    
29     29    
2     2    
1100     1200    
4     4    
3DDPAK/TO-263: 155 mm2: 15.24 x 10.16 (DDPAK/TO-263 | 3)
4SOT-223: 46 mm2: 7 x 6.5 (SOT-223 | 4)    
3DDPAK/TO-263: 155 mm2: 15.24 x 10.16 (DDPAK/TO-263 | 3)
4SOT-223: 46 mm2: 7 x 6.5 (SOT-223 | 4)