DC voltage regulator TPS7A47

for medical applicationsLDOlinear

Description
The TPS7A47 family are positive-voltage, low-dropout linear regulators (LDOs) designed for ultralow-noise (4 µVRMS) operation and capable of supplying up to 1 A. The family includes a PCB-programmable ANY-OUT™ version (TPS7A4700) allowing user-defined output voltages via layout, and an adjustable version (TPS7A4701) configurable with external feedback resistors up to 34 V. Implemented in bipolar technology for high-accuracy instrumentation, the TPS7A47 is optimized to provide clean rails for precision analog and mixed-signal systems.

Key parameters

• Maximum input voltage (Vin max): 36 V
• Minimum input voltage (Vin min): 3 V
• Output current (Iout max): 1 A
• Output options: Adjustable, PCB-programmable (ANY-OUT™), Fixed
• Output voltage range (Vout): 1.4 V min – up to 34 V (depending on version)
• Output noise: 4 µVRMS (10 Hz–100 kHz)
• PSRR: 82 dB at 100 Hz; >55 dB across 10 Hz–10 MHz; 60 dB at 100 kHz (tabulated)
• Quiescent current (Iq typ): 0.58 mA
• Dropout voltage (typ) at 1 A: 307 mV
• Minimum load capacitance: 10 µF
• Accuracy: ±2.5%
• Thermal resistance θJA (typ): 30.5 °C/W
• Operating temperature range: –40 °C to +125 °C

Main features

• Input voltage range: +3 V to +36 V
• Ultralow output-noise: 4 µVRMS (10 Hz–100 kHz)
• High PSRR for sensitive analog and RF systems
• Two configuration modes: PCB-programmable ANY-OUT™ or fixed/adjustable with external feedback
• Adjustable version (TPS7A4701): output adjustable up to 34 V with external resistors
• Enable pin compatible with CMOS logic levels
• Internal current limit and thermal shutdown protection
• Available in compact thermal package (20-pin VQFN, 5 × 5 mm)

Applications

• Powering high-precision operational amplifiers, ADCs and DACs
• Post-regulation after dc-dc converters to filter switching ripple
• Test and measurement, instrumentation, and audio/RF front ends
• Medical and other systems requiring ultralow-noise supply rails

Package and documentation

• Package: 20-pin VQFN (5 × 5 mm)
• Thermal performance: θJA ≈ 30.5 °C/W (typ)
• Documentation: datasheet, evaluation module (EVM) materials, application notes and design guides