1 Features

1• Input Voltage: 2.7 V to 6.5 V

• 500-mA Low-Dropout Regulator With EN

• Low IQ: 45 μA

• Multiple Output Voltage Versions Available:

– Fixed Outputs of 1.2 V to 4.3 V

– Adjustable Outputs from 1.25 V to 6 V

• High PSRR: 68 dB at 1 kHz

• Low Noise: 13.2 μVRMS

• Fast Start-Up Time: 45 μs

• Stable With a Ceramic, 2.2-μF, Low-ESR Output

Capacitor

• Excellent Load and Line Transient Response

• 2% Overall Accuracy (Load, Line, and

Temperature, VOUT > 2.2 V)

• Very Low Dropout: 280 mV at 500 mA

• 2-mm × 2-mm WSON-6 and

3-mm × 3-mm SON-8 Packages

2 Applications

• Post DC-DC Converter Ripple Filtering

• IP Network Cameras

• Macro Base Stations

• Thermostats

3 Description

The TPS735 low-dropout (LDO), low-power linear

regulator offers excellent AC performance with very

low ground current. High power-supply rejection ratio

(PSRR), low noise, fast start-up, and excellent line

and load transient responses are provided while

consuming a very low 45-μA (typical) ground current.

The TPS735 device is stable with ceramic capacitors

and uses an advanced BiCMOS fabrication process

to yield a typical dropout voltage of 280 mV at 500-

mA output. The TPS735 device uses a precision

voltage reference and feedback loop to achieve

overall accuracy of 2% (VOUT > 2.2 V) over all load,

line, process, and temperature variations. This device

is fully specified from TJ = –40°C to +125°C and is

offered in a low-profile, 3 mm × 3 mm SON-8

package and a 2 mm × 2 mm WSON-6 package.