TPS7A1409PDRVR中文资料德州仪器数据手册PDF规格书

1 Features

• Ultra-low input voltage range: 0.7 V to 2.2 V

• High efficiency:

– Dropout voltage at 1 A: 70 mV (max, YBK)

– Specified for VIN = VOUT +100 mV

• Excellent load transient response:

– 20 mV for ILOAD = 3 mA to 600 mA in 20 μs

• Accuracy over load, line, and temperature: 1

• High PSRR:

– 80 dB at 1 kHz (VOUT = 0.8 V, IOUT = 500 mA)

• Available in fixed-output voltages:

– 0.5 V to 2.0 V (in 25-mV steps)

• VBIAS range: 2.2 V to 5.5 V

• Packages:

– 6-pin DSBGA: 0.71 mm × 1.16 mm

– 6-pin WSON: 2 mm × 2 mm

• Active output discharge

2 Applications

• Camera modules

• Wireless headphones and earbuds

• Smart watch and fitness trackers

• Smart phones and tablets

• Portable medical devices

• Solid state drives (SSDs)

3 Description

The TPS7A14 is a small, ultra low-dropout regulator

(LDO) with excellent transient response. This device

can source 1 A with outstanding ac performance (load

and line transient responses). The input voltage range

is 0.7 V to 2.2 V, and the output range is 0.5 V to

2.0 V with a very high accuracy of 1 over load, line,

and temperature.

The primary power path is through the IN pin and can

be connected to a power supply as low as 50 mV

above the output voltage. All electrical characteristics

(including excellent output voltage tolerance, transient

response, and PSRR) are specified for input voltages

100 mV greater than the output voltage, thereby

yielding high practical efficiency. This regulator

supports very low input voltages with the use of a

higher, externally supplied VBIAS rail that is used to

power the internal circuitry of the LDO. For example,

the supply voltage to the IN pin can be the output

of a high-efficiency, DC/DC step-down regulator and

the BIAS pin supply voltage can be a rechargeable

battery.

The TPS7A14 is equipped with an active pulldown

circuit to quickly discharge the output when disabled,

and provides a known start-up state.

The TPS7A14 is available in a 2-mm × 2-mm, 6-pin

WSON package and an ultra-small 0.71-mm × 1.16-

mm, 6-bump WCSP package.