1 Features

• Low output voltage noise: 7μVRMS

– No noise-bypass capacitor required

• High PSRR: 89dB at 1kHz

• Very low IQ: 6.5μA

• Input voltage range: 1.6V to 6.0V

• Output voltage range: 0.8V to 5.5V

• Output voltage tolerance: ±1.5% (max)

• Very low dropout:

– 95mV (max) at 75mA (VOUT = 1.5V to 5.5V)

• Low inrush current

• Smart enable pulldown

• Stable with 1μF minimum ceramic output capacitor

• 0.616mm × 0.616mm DSBGA package

2 Applications

• Smartphones and tablets

• IP network cameras

• Portable medical equipment

• Smart meters and field transmitters

• Motor drives

• Wearables

3 Description

The TPS7A20U is an ultra-small, low-dropout (LDO)

linear regulator that sources 75mA of output

current. The TPS7A20U is designed to provide

low noise, high PSRR, and excellent load and

line transient performance. This performance meets

the requirements of RF and other sensitive analog

circuits. Using innovative design techniques, the

TPS7A20U offers ultra-low noise performance without

the addition of a noise bypass capacitor. The

TPS7A20U also provides the advantage of low

quiescent current, which is designed for batterypowered

applications. With a 1.6V to 6.0V input

voltage range and a 0.8V to 5.5V output range,

the TPS7A20U is applicable for a wide variety of

applications. The device uses a precision reference

circuit to provide a maximum accuracy of 1.5% over

load, line, and temperature variations.

The TPS7A20U features an internal soft-start to

lower the inrush current, thus minimizing the input

voltage drop during start-up. The device is stable with

small ceramic capacitors, allowing for a small overall

solution size.

The TPS7A20U has a smart enable input circuit with

an internally controlled pulldown resistor that keeps

the LDO disabled. The LDO remains disabled even

when the EN pin is left floating and helps eliminate the

external components used to pulldown the EN pin.