REG104 1A, Low-Noise, Low Dropout Regulator | TI.com

REG104 (ACTIVE)

1A, Low-Noise, Low Dropout Regulator

1A, Low-Noise, Low Dropout Regulator - REG104
Datasheet
 

Description

The REG104 is a family of low-noise, low-dropout linear regulators with low ground pin current. Its new DMOS topology provides significant improvement over previous designs, including low dropout voltage (only 230mV typ at full load), and better transient performance. In addition, no output capacitor is required for stability, unlike conventional low dropout regulators that are difficult to compensate and require expensive low ESR capacitors greater than 1µF.

Typical ground pin current is only 1.7mA (at IOUT = 1A) and drops to 0.5µA in not enabled mode. Unlike regulators with PNP pass devices, quiescent current remains relatively constant over load variations and under dropout conditions.

The REG104 has very low output noise (typically 33µVRMS for VOUT = 3.3V with CNR = 0.01µF), making it ideal for use in portable communications equipment. On-chip trimming results in high output voltage accuracy. Accuracy is maintained over temperature, line, and load variations. Key parameters are tested over the specified temperature range (–40°C to +85°C).

The REG104 is well protected—internal circuitry provides a current limit which protects the load from damage. Thermal protection circuitry keeps the chip from being damaged by excessive temperature. The REG104 is available in the DDPAK-5 and the SOT223-5.

Features

  • NEW DMOS TOPOLOGY:
    Ultra Low Dropout Voltage:
    230mV typ at 1A and 3.3V Output
    Output Capacitor NOT Required for Stability
  • FAST TRANSIENT RESPONSE
  • VERY LOW NOISE: 33µVRMS
  • HIGH ACCURACY: ±2% max
  • HIGH EFFICIENCY:
    IGND = 1.7mA at IOUT = 1A
    Not Enabled: IGND = 0.5µA
  • 2.5V, 2.7V, 3.0V, 3.3V, 5.0V AND ADJUSTABLE OUTPUT VERSIONS
  • THERMAL PROTECTION
  • SMALL SURFACE-MOUNT PACKAGES: SOT223-5, DDPAK-5
  • APPLICATIONS
    • PORTABLE COMMUNICATION DEVICES
    • BATTERY-POWERED EQUIPMENT
    • MODEMS
    • BAR-CODE SCANNERS
    • BACKUP POWER SUPPLIES

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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)
REG104 REG101 REG102 REG103
Adjustable Output
Fixed Output    
Adjustable Output
Fixed Output    
Adjustable Output
Fixed Output    
Adjustable Output
Fixed Output    
1     0.1     0.25     0.5    
15     10     10     15    
2.7     1.8     2.2     2.7    
5.5     5.5     5.5     5.5    
1.3     2.5     2.5     1.3    
2.5
3
3.3
5    
2.5
2.8
2.85
3
3.3
5    
2.5
2.8
2.85
3
3.3
5    
2.5
3
3.3
5    
DDPAK/TO-263 | 5
SOT-223 | 6    
SOIC | 8
SOT-23 | 5    
SOIC | 8
SOT-223 | 6
SOT-23 | 5    
DDPAK/TO-263 | 5
SOIC | 8
SOT-223 | 6    
Enable     Enable
Foldback Overcurrent Protection    
Enable     Enable
Power Good    
1     1     1     1    
-40 to 85     -40 to 85     -40 to 85     -40 to 85    
27     150     150     150    
33     23     28     33    
2.33 | 1ku     0.92 | 1ku     1.05 | 1ku     2.24 | 1ku    
Catalog     Catalog     Catalog     Catalog    
Cap Free
Ceramic    
Cap Free
Ceramic    
Cap Free
Ceramic    
Cap Free
Ceramic    
  46     46     20    
2     2     2     2    
230     60     150     115    
1.7     0.4     0.4     1    
5DDPAK/TO-263: 155 mm2: 15.24 x 10.16 (DDPAK/TO-263 | 5)
6SOT-223: 46 mm2: 7.06 x 6.5 (SOT-223 | 6)    
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
5SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 5)    
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
6SOT-223: 46 mm2: 7.06 x 6.5 (SOT-223 | 6)
5SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 5)    
5DDPAK/TO-263: 155 mm2: 15.24 x 10.16 (DDPAK/TO-263 | 5)
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
6SOT-223: 46 mm2: 7.06 x 6.5 (SOT-223 | 6)