TPS7A85A Texas instruments

TPS7A85A

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TPS7A85A

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Описание

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 µV_RMSat 0.8-V Output
- 7.7 µV_RMS 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
θ_JC = 3.4°C/W
3.5-mm × 3.5-mm, 20-Pin VQFN

Output options	Adjustable Output, Programmable Output
Iout (max) (A)	4
Vin (max) (V)	6.5
Vin (min) (V)	1.1
Vout (max) (V)	5.1
Vout (min) (V)	0.8
Noise (µVrms)	4.4
Iq (typ) (mA)	2.8
Thermal resistance θJA (°C/W)	43
Rating	Catalog
Load capacitance (min) (µF)	47
Regulated outputs (#)	1
Features	Enable, Foldback overcurrent protection, Output discharge, Power good, Soft start
Accuracy (%)	0.75
PSRR at 100 KHz (dB)	25
Dropout voltage (Vdo) (typ) (mV)	150
Operating temperature range (°C)	-40 to 125