TPS7A4701

Part: TPS7A4701RGWT — Texas Instruments (TPS7A470x family)

Type: Positive High-Voltage Ultralow-Noise RF LDO Linear Regulator

Description: 3–35 V input, 1 A LDO with 4 μVRMS output noise (10 Hz–100 kHz), 307 mV typical dropout at 1 A, and an output range of 1.4–20.5 V (ANY-OUT) or up to 34 V (adjustable, TPS7A4701 only).

Operating Conditions:

• Supply voltage (VI): 3.0–35.0 V
• Operating temperature: -40 to 125 °C (junction)
• Output voltage: 1.4–34.0 V; output current 0–1.0 A

Absolute Maximum Ratings:

• Max voltage, IN / EN / OUT / NR / SENSE/FB / programming pins to GND: +36 V (min -0.4 V)
• EN pin to IN pin: -36 V to +0.4 V
• Peak output current: internally limited
• Operating virtual junction temperature: -40 to 125 °C
• Storage temperature: -65 to 150 °C

Key Specs:

• Dropout voltage: 216 mV typ at 0.5 A; 307 mV typ, 450 mV max at 1 A (VI = 95% VO(nom))
• Output accuracy: ±1.0% nominal (TJ = 25 °C); ±2.5% overall over line, load and temperature
• Current limit: 1.26 A typ (1 A min), VO = 90% VO(nom)
• Ground pin current: 0.58 mA typ (1.0 mA max) at IO = 0 mA; 6.1 mA typ at IO = 1 A
• Shutdown current: 2.55 μA typ (8 μA max) at VEN = 0.4 V
• PSRR: 78 dB typ at 1 kHz (VI = 16 V, VO = 15 V, IO = 500 mA, COUT = 50 μF, CNR = 1 μF)
• Output noise: 4.17 μVRMS typ (VO = 1.4 V); 4.67 μVRMS typ (VO = 5 V); 10 Hz–100 kHz, CNR = 1 μF, COUT = 50 μF
• UVLO: 2.67 V rising, 2.5 V falling; thermal shutdown 170 °C (reset at 150 °C)
• Reference voltage: 1.4 V (TPS7A4701 adjustable mode); feedback pin current 350 nA typ

Features:

• ANY-OUT user-programmable output via PCB layout, with no external feedback resistors or feed-forward capacitors
• Adjustable output with external resistors (TPS7A4701 only)
• Power-supply ripple rejection: 82 dB at 100 Hz; at least 55 dB from 10 Hz to 10 MHz
• CMOS logic-compatible enable pin
• Built-in fixed current limit and thermal shutdown
• High-performance thermal package: 5 mm × 5 mm QFN

Applications:

• Voltage-controlled oscillators and frequency synthesizers
• Test and measurement, instrumentation, medical, audio
• RX, TX and PA circuitry
• Supply rails for op amps, DACs, ADCs and other precision analog circuitry
• Post DC-DC converter regulation and ripple filtering
• Base stations and telecom infrastructure
• +12 V and +24 V industrial buses

Package:

• VQFN-20 (RGW), 5 mm × 5 mm

• Input Voltage Range: +3V to +36V
• Output Voltage Noise: 4 μVRMS (10Hz, 100kHz)
• Power-Supply Ripple Rejection:
• -82dB (100Hz)
• -≥ 55dB (10Hz, 10MHz)
• Two Output Voltage Modes:
• -ANY-OUT ™ Version (User-Programmable Output via PCB Layout):
• No External Feedback Resistors or FeedForward Capacitors Required
• Output Voltage Range: +1.4V to +20.5V
• -Adjustable Version (TPS7A4701 only):
• Output Voltage Range: +1.4V to +34V
• Output Current: 1A
• Dropout Voltage: 307mV at 1A
• CMOS Logic Level-Compatible Enable Pin
• Built-In Fixed Current Limit and Thermal Shutdown
• Available in High-Performance Thermal Package: 5-mm × 5-mm QFN
• Operating Temperature Range: -40°C to 125°C

• Voltage-Controlled Oscillators (VCO)
• Frequency Synthesizers
• Test and Measurement
• Instrumentation, Medical, and Audio
• RX, TX, and PA Circuitry
• Supply Rails for Operational Amplifiers, DACs, ADCs, and Other High-Precision Analog Circuitry
• Post DC-DC Converter Regulation and Ripple Filtering
• Base Stations and Telecom Infrastructure
• +12-V and +24-V Industrial Buses

Figure 4-1. RGW Package 5-mm × 5-mm VQFN-20 (Top View)

Table 4-1. Pin Functions

At -40°C ≤ TJ ≤ 125°C; VI = VO(nom) + 1.0 V or V I = 3.0 V (whichever is greater); V EN = VI ; IO = 0 mA; CIN =10 μF; COUT = 10 μF; CNR = 10 nF; SENSE/FB tied to OUT; and 0P1V, 0P2V, 0P4V, 0P8V, 1P6V, 3P2V, 6P4V1, 6P4V2 pins OPEN, unless otherwise noted.

Over junction temperature range, unless otherwise noted. (1)

over junction temperature range (unless otherwise noted)

The TPS7A740x is a high-voltage, low-noise, 1-A LDO. Low-noise performance makes this LDO ideal for providing rail voltages to noise-sensitive loads, such as PLLs, oscillators, and high-speed ADCs.