1 Features

? Fast settling when used with low output

capacitance and inductance

? Low output voltage noise: 7μVRMS

– No noise-bypass capacitor required

? High PSRR: 58dB at 100kHz, 20mA

? Very low IQ: 11μA

? 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:

– 140mV (max) at 300mA (VOUT = 3.3V)

? Low inrush current

? Smart enable pulldown

? Stable with 0.47μF minimum output capacitance

? Package:

– 0.616mm × 0.616mm DSBGA

2 Applications

? Image sensors

? Smartphones and tablets

? IP network cameras

? Portable medical equipment

? Smart meters and field transmitters

? Motor drives

? Wearables

3 Description

The TPS7A20C is an ultra-small, low-dropout (LDO)

linear regulator that sources 300mA of output

current. This LDO is designed to power sensitive

loads such as image sensors. When used with

low output capacitance and inductance, the device

provides low noise, high PSRR, and excellent load

and line transient performance. Using innovative

design techniques, the TPS7A20C offers ultra-low

noise performance without the addition of a noisebypass

capacitor. The TPS7A20C also provides the

advantage of low quiescent current, which is useful

in battery-powered applications. The 1.6V to 6.0V

input voltage range and 0.8V to 5.5V output range

are appropriate 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 TPS7A20C features an internal soft-start circuit

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 TPS7A20C has a smart enable input circuit with

an internally controlled pulldown resistor. This resistor

keeps the LDO disabled and helps eliminate the

external components used to pulldown the EN pin.

The LDO remains disabled even when the EN pin is

left floating.