TPS79333DBVR 厂家直销

DBV 5

DBV 6

YEQ

www.ti.com

TPS79301, TPS79318

TPS79325, TPS79328, TPS793285

TPS79330, TPS79333, TPS793475

SLVS348H – JULY 2001 – REVISED OCTOBER 2004

ULTRALOW-NOISE, HIGH PSRR, FAST RF 200-mA LOW-DROPOUT LINEAR

REGULATORS IN NanoStar™ WAFER CHIP SCALE AND SOT23

FEATURES

•

•

•

•

•

•

•

•

•

200-mA RF Low-Dropout Regulator

With Enable

Available in 1.8-V, 2.5-V, 2.8-V, 2.85-V, 3-V,

3.3-V, 4.75-V, and Adjustable (1.22-V to 5.5-V)

High PSRR (70 dB at 10 kHz)

Ultralow-Noise (32 μV

RMS

, TPS79328)

Fast Start-Up Time (50 μs)

Stable With a 2.2-μF Ceramic Capacitor

Excellent Load/Line Transient Response

Very Low Dropout Voltage (112 mV at Full

Load, TPS79330)

5- and 6-Pin SOT23 (DBV) and NanoStar Wafer

Chip Scale (YEQ) Packages

DESCRIPTION

The TPS793xx family of low-dropout (LDO)

low-power linear voltage regulators features high

power-supply rejection ratio (PSRR), ultralow-noise,

fast start-up, and excellent line and load transient

responses in NanoStar wafer chip scale and SOT23

packages. NanoStar packaging gives an ultrasmall

footprint as well as an ultralow profile and package

weight, making it ideal for portable applications such

as handsets and PDAs. Each device in the family is

stable, with a small 2.2-μF ceramic capacitor on the

output. The TPS793xx family uses an advanced,

proprietary BiCMOS fabrication process to yield ex-

tremely low dropout voltages (e.g., 112 mV at

200 mA, TPS79330). Each device achieves fast

start-up times (approximately 50 μs with a 0.001-μF

bypass capacitor) while consuming very low quiesc-

ent current (170 μA typical). Moreover, when the

device is placed in standby mode, the supply current

is reduced to less than 1 μA. The TPS79328 exhibits

approximately 32 μV

RMS

of output voltage noise at

2.8-V output with a 0.1-μF bypass capacitor. Appli-

cations with

analog components

that

are

noise-sensitive, such as portable RF electronics,

benefit from the high PSRR and low-noise features

as well as the fast response time.

TPS79328

APPLICATIONS

•

•

•

•

•

RF: VCOs, Receivers, ADCs

Audio

Cellular and Cordless Telephones

Bluetooth™, Wireless LAN

Handheld Organizers, PDAs

DBV PACKAGE

(TOP VIEW)

TPS79328

IN

GND

EN

1

2

3

4

NR

5

OUT

0.30

Output Spectral Noise Density (μV/√Hz)

OUTPUT SPECTRAL NOISE DENSITY

vs

FREQUENCY

100

V

IN

= 3.8 V

C

OUT

= 2.2

μF

C

NR

= 0.1

μF

Ripple Rejection (dB)

90

80

70

60

50

40

30

20

10

0

100

1k

10 k

Frequency (Hz)

100 k

0

10

RIPPLE REJECTION

vs

FREQUENCY

I

OUT

= 200 mA

Fixed Option

DBV PACKAGE

(TOP VIEW)

IN

GND

EN

1

2

3

6

5

4

OUT

FB

NR

0.25

0.20

0.15

I

OUT

= 1 mA

0.10

I

OUT

= 200 mA

0.05

I

OUT

= 10 mA

Adjustable Option

YEQ

PACKAGE

(TOP VIEW)

IN

C3

A3

C1

B2

A1

V

IN

= 3.8 V

C

OUT

= 10

μF

C

NR

= 0.01

μF

100

1k

10 k

100 k

1M

10 M

OUT

NR

GND

Frequency (Hz)

EN

Figure 1.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

Bluetooth is a trademark of Bluetooth Sig, Inc.

NanoStar is a trademark of Texas Instruments