TPS7A85A High-Current (4A), High-Accuracy (0.75%), Low-Noise (4.4µVRMS), LDO Voltage Regulator | TI.com

TPS7A85A (ACTIVE)

High-Current (4A), High-Accuracy (0.75%), Low-Noise (4.4µVRMS), LDO Voltage Regulator

 

Recommended alternative parts

  • TPS7A85  -  The TPS7A85 is a 4-A LDO regulator with good accuracy (1%) and improved thermal resistance (35.4°C/W).
  • TPS7A89  -  The TPS7A89 is a dual 2-A LDO regulator with improved noise (3.8µVrms) in a very small package (4 mm x 4 mm).
  • TPS7A54-Q1  -  TPS7A54-Q1 is a low noise 4A LDO with an extended temperature range

Description

The TPS7A85A is a low-noise (4.4 µVRMS), low dropout linear regulator (LDO) capable of sourcing 4 A with only 240 mV of maximum dropout. The device output voltage is pin-programmable from 0.8 V to 3.95 V and adjustable from 0.8 V to 5.1 V using an external resistor divider.

The combination of low-noise (4.4 µVRMS), high- PSRR, and high output current capability makes the TPS7A85A ideal to power noise-sensitive components such as those found in high-speed communications, video, medical, or test and measurement applications. The high performance of the TPS7A85A limits power-supply-generated phase noise and clock jitter, making this device ideal for powering high-performance serializer and deserializer (SerDes), analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and RF components. Specifically, RF amplifiers benefit from the high-performance and 5.1-V output capability of the device.

For digital loads (such as application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), and digital signal processors (DSPs)) requiring low-input voltage, low-output (LILO) voltage operation, the exceptional accuracy (0.75% over load and temperature), remote sensing, excellent transient performance, and soft-start capabilities of the TPS7A85A ensure optimal system performance.

The versatility of the TPS7A8500A makes the device a component of choice for many demanding applications.

Features

  • Low Dropout: 150 mV (Typical) at 4 A
  • 0.75% (Maximum) Accuracy Over Line, Load, and Temperature With BIAS
  • Output Voltage Noise:
    • 4.4 µVRMS at 0.8-V Output
    • 7.7 µVRMS at 5.1-V Output
  • Input Voltage Range:
    • Without BIAS: 1.4 V to 6.5 V
    • With BIAS: 1.1 V to 6.5 V
  • ANY-OUT™ Operation:
    • Output Voltage Range: 0.8 V to 3.95 V
  • Adjustable Operation:
    • Output Voltage Range: 0.8 V to 5.1 V
  • Power-Supply Ripple Rejection:
    • 40 dB at 500 kHz
  • Excellent Load Transient Response
  • Adjustable Soft-Start In-Rush Control
  • Open-Drain Power-Good (PG) Output
  • Stable with a 47-µF or Larger Ceramic Output Capacitor
  • θJC = 3.4°C/W
  • 3.5-mm × 3.5-mm, 20-Pin VQFN

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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)
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)
TPS7A85A TPS7A83A TPS7A84A
Adjustable Output
Programmable Output    
Adjustable Output
Programmable Output    
Adjustable Output
Programmable Output    
4     2     3    
6.5     6.5     6.5    
1.1     1.1     1.1    
5.1     5.2     5.15    
0.8     0.8     0.8    
VQFN | 20     VQFN | 20
VQFN | 20    
VQFN | 20    
Enable
Foldback Overcurrent Protection
Output Discharge
Power Good
Soft Start    
Enable
Foldback Overcurrent Protection
Output Discharge
Power Good
Soft Start    
Enable
Foldback Overcurrent Protection
Output Discharge
Power Good
Soft Start    
1     1     1    
-40 to 125     -40 to 125     -40 to 125    
43     43     43    
4.4     4.4     4.4    
3.50 | 1ku     2.45 | 1ku     2.90 | 1ku    
Catalog     Catalog     Catalog    
Ceramic     Ceramic     Ceramic    
25     40     25    
0.75     0.75     0.75    
150     75     110    
2.8     2.8     2.8    
20VQFN: 12 mm2: 3.5 x 3.5 (VQFN | 20)     20VQFN: 12 mm2: 3.5 x 3.5 (VQFN | 20)
20VQFN: 25 mm2: 5 x 5 (VQFN | 20)    
20VQFN: 12 mm2: 3.5 x 3.5 (VQFN | 20)