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1 Features

? AEC-Q100 qualified for automotive applications:

– Temperature grade 1: –40°C to +125°C

– Junction temperature: –40°C to +150°C

? Very low IQ: 6.5μA

? Input voltage range: 2.0V to 6.0V

? Output voltage range: 0.8V to 5.5V (50mV steps)

? High PSRR: 91dB at 1kHz

? Low output voltage noise: 7.7μVRMS

? Low dropout:

– 265mV (maximum) at 500mA (2.5V VOUT)

? Smart EN pulldown

? Output voltage tolerance: ±1% over temperature

? Supports a wide range of ceramic capacitors:

– 1μF to 200μF

? Package:

– 3mm × 3mm wettable flank VSON

– 2mm × 2mm wettable flank WSON

– 2mm × 2mm WSON (Advance Information)

2 Applications

? DAS cameras and radar

? Automotive infotainment

? Telematics systems

? Navigation systems

3 Description

The TPS7A21-Q1 is a small, low-dropout (LDO)

linear voltage regulator that sources 500mA of output

current. The device provides low noise, high PSRR,

and excellent load and line transient performance

to meet the requirements of RF and other sensitive

analog circuits in automotive applications. Innovative

design techniques result in low-noise performance

without the addition of an external noise bypass

capacitor. The TPS7A21-Q1 low quiescent current

is a good choice for low-power systems. The 2.0V

to 6.0V input voltage range and 0.8V to 5.5V

output voltage range support a variety of system

requirements.

An internal soft-start circuit helps control inrush

current, thus minimizing the input voltage drop during

start-up. The LDO is stable with small ceramic

capacitors, allowing for a small overall solution size.

A smart enable input circuit with an internally

controlled pulldown resistor keeps the LDO disabled

even when the EN pin is unconnected. This circuit

also helps eliminate external components that are

otherwise required to pull down the EN input.