TPS7A85A 高电流 (4A) 高精度 (0.75%) 低噪声 (4.4µVRMS) LDO 稳压器 | 德州仪器

TPS7A85A (正在供货)

高电流 (4A) 高精度 (0.75%) 低噪声 (4.4µVRMS) LDO 稳压器

高电流 (4A) 高精度 (0.75%) 低噪声 (4.4µVRMS) LDO 稳压器 - TPS7A85A


  • 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


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.


  • 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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参数 与其它产品相比 单通道 LDO

Iout (Max) (A)
Output Options
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iq (Typ) (mA)
Vdo (Typ) (mV)
Accuracy (%)
Noise (uVrms)
PSRR @ 100KHz (dB)
Output Capacitor Type
Operating Temperature Range (C)
4     2     3    
Adjustable Output
Programmable Output    
Adjustable Output
Programmable Output    
Adjustable Output
Programmable Output    
1.1     1.1     1.1    
6.5     6.5     6.5    
0.8     0.8     0.8    
5.1     5.2     5.15    
2.8     2.8     2.8    
150     75     110    
0.75     0.75     0.75    
4.4     4.4     4.4    
25     40     25    
Ceramic     Ceramic     Ceramic    
Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 125    
20VQFN     20VQFN