UC285 5-A, Fast Transient Response, Low-Dropout Regulator | TI.com

UC285 (ACTIVE)

5-A, Fast Transient Response, Low-Dropout Regulator

 

Recommended alternative parts

  • TPS7A85  -  TPS7A85 is a newer 4A higher performance LDO.

Description

The UC385 is a low dropout linear regulator providing a quick response to fast load changes. Combined with its precision onboard reference, the UC385 excels at driving GTL and BTL buses. Due to its fast response to load transients, the total capacitance required to decouple the regulator’s output can be significantly decreased when compared to standard LDO linear regulators.

Dropout voltage (VIN to VOUT) is only 490 mV maximum and 350 mV typical at 5-A load (0°C to 100°C).

The onboard bandgap reference is stable with temperature and scaled for a 1.2 V input to the internal power amplifier. The UC385 is available in fixed output voltages of 1.5 V, 2.1 V, or 2.5 V. The output voltage of the adjustable version can be set with two external resistors. If the external resistors are omitted, the output voltage defaults to 1.2 V.

Features

  • Fast Transient Response
  • 10-mA to 5-A Load Current
  • Short Circuit Protection
  • Maximum Dropout of 500-mV at 5-A Load Current
  • Separate Bias (VB) and VIN Pins
  • Available in Adjustable or Fixed Output Voltages
  • 5-Pin Package Allows Kelvin Sensing of Load Voltage
  • Reverse Current Protection

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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)
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)
UC285
Adjustable Output
Fixed Output    
5    
7.5    
1.7    
6    
1.2    
1.5
2.1
2.5    
DDPAK/TO-263 | 5
TO-220 | 5    
Reverse Current Protection    
1    
-40 to 100
-40 to 85    
4.35 | 1ku    
Catalog    
Non-Ceramic    
38    
1.3    
350    
40    
5DDPAK/TO-263: 155 mm2: 15.24 x 10.16 (DDPAK/TO-263 | 5)
See datasheet (TO-220)