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

TPS7A85A
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
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

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Part number Order 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 PSRR @ 100 KHz (dB) Accuracy (%) Dropout voltage (Vdo) (Typ) (mV) Iq (Typ) (mA) Package size: mm2:W x L (PKG)
TPS7A85A Order now Adjustable Output
Programmable Output    
4     6.5     1.1     5.1     0.8     VQFN | 20     Enable
Foldback Overcurrent Protection
Output Discharge
Power Good
Soft Start    
1     -40 to 125     43     4.4     3.50 | 1ku     Catalog     25     0.75     150     2.8     20VQFN: 12 mm2: 3.5 x 3.5 (VQFN | 20)    
TPS7A83A Order now Adjustable Output
Programmable Output    
2     6.5     1.1     5.2     0.8     VQFN | 20
VQFN | 20    
Enable
Foldback Overcurrent Protection
Output Discharge
Power Good
Soft Start    
1     -40 to 125     43     4.4     2.45 | 1ku     Catalog     40     0.75     75     2.8     20VQFN: 12 mm2: 3.5 x 3.5 (VQFN | 20)
20VQFN: 25 mm2: 5 x 5 (VQFN | 20)    
TPS7A84A Order now Adjustable Output
Programmable Output    
3     6.5     1.1     5.15     0.8     VQFN | 20     Enable
Foldback Overcurrent Protection
Output Discharge
Power Good
Soft Start    
1     -40 to 125     43     4.4     2.90 | 1ku     Catalog     25     0.75     110     2.8     20VQFN: 12 mm2: 3.5 x 3.5 (VQFN | 20)