TEXAS INSTRUMENTS TPS79401, TPS79418, TPS79425, TPS79428, TPS79430 Technical data

...

www.ti.com

OUT

NC − No internal connection

2 3 4 5

DCQ PACKAGE

OUT

GND

3 4

6 5

IN NC

GND

SOT223-6

(TOP VIEW)

DGN PACKAGE

MSOP PowerPAD

(TOP VIEW)

OUT

= 10 mA

OUT

= 250 mA

VIN = 4.3 V, V

OUT

= 3.3 V, CIN = 1 µF, C

OUT

= 10 µF, CNR = 0.01 µF

20 10

10 100 1 k 10 k

Ripple Rejection (dB)

Frequency (Hz)

TPS79433

RIPPLE REJECTION

FREQUENCY

100 k 1 M 10 M

0.05

0.10

0.15

0.20

0.25

0.30

0.35

OUT

= 250 mA

OUT

= 1 mA

OUT

= 2.2 µF, CNR = 0.1 µF, VIN = 3.8 V

TPS79428

OUTPUT SPECTRAL NOISE DENSITY

FREQUENCY

Frequency (Hz)

100 1000 10000 100000

6 GND

Output Spectral Noise Density (µV/√Hz)

查询TPS79401供应商

ULTRALOW-NOISE, HIGH PSRR, FAST RF 250-mA LOW-DROPOUT LINEAR

FEATURES DESCRIPTION

• 250-mA Low-Dropout Regulator With Enable

• Available in 1.8 V, 2.5 V, 2.8 V, 3 V, 3.3 V, and

Adjustable (1.2 V to 5.5 V)

• High PSRR (60 dB at 10 kHz)

• Ultralow Noise (32 µVrms, TPS79428)

• Fast Start-Up Time (50 µs)

• Stable With a 2.2-µF Ceramic Capacitor

• Excellent Load/Line Transient Response

• Very Low Dropout Voltage (155 mV at Full

Load)

• Available in MSOP-8 and SOT223-6 Packages

APPLICATIONS

• RF: VCOs, Receivers, ADCs

• Audio

• Bluetooth™, Wireless LAN

• Cellular and Cordless Telephones

• Handheld Organizers, PDAs

TPS79401, TPS79418 TPS79425, TPS79428 TPS79430, TPS79433

SLVS349D – NOVEMBER 2001 – REVISED OCTOBER 2004

REGULATORS

The TPS794xx family of low-dropout (LDO) linear voltage regulators features high power-supply rejection ratio (PSRR), ultralow-noise, fast start-up, and excellent line and load transient responses in small outline, MSOP-8 PowerPAD™ and SOT223-6 packages. Each device in the family is stable with a small

2.2-µF ceramic capacitor on the output. The family uses an advanced, proprietary BiCMOS fabrication process to yield extremely low dropout voltages (e.g., 155 mV at 250 mA). Each device achieves fast start-up times (approximately 50 µs with a 0.001-µF bypass capacitor) while consuming low quiescent current (170 µA typical). Moreover, when the device is placed in standby mode, the supply current is reduced to less than 1 µA. The TPS79428 exhibits approximately 32 µV

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

of output voltage noise at

RMS

Bluetooth is a trademark of Bluetooth SIG, Inc. PowerPAD is a trademark of Texas Instruments. All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

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.

www.ti.com

TPS79401, TPS79418 TPS79425, TPS79428 TPS79430, TPS79433

SLVS349D – NOVEMBER 2001 – REVISED OCTOBER 2004

This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.

ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.

PRODUCT VOLTAGE PACKAGE T

MSOP-8 AXL

TPS79401 Adjustable

SOT223-6 PS79401

MSOP-8 AXM

TPS79418 1.8 V

SOT223-6 PS79418

MSOP-8 AYB

TPS79423 2.5 V

SOT223-6 PS79425

MSOP-8 AYC

TPS79428 2.8 V

SOT223-6 PS79428

MSOP-8 AYD

TPS79430 3 V

SOT223-6 PS79430

MSOP-8 AYE

TPS79433 3.3 V

SOT223-6 PS79433

ORDERING INFORMATION

-40 ° C to 125 ° C

SYMBOL PART NUMBER

TRANSPORT MEDIA,

QUANTITY

TPS79401DGNR Tape and Reel, 2500 TPS79401DGNT Tape and Reel, 250 TPS79401DCQR Tape and Reel, 2500

TPS79401DCQ Tube, 78 TPS79418DGNR Tape and Reel, 2500 TPS79418DGNT Tape and Reel, 250 TPS79418DCQR Tape and Reel, 2500

TPS79418DCQ Tube, 78 TPS79425DGNR Tape and Reel, 2500 TPS79425DGNT Tape and Reel, 250 TPS79425DCQR Tape and Reel, 2500

TPS79425DCQ Tube, 78 TPS79428DGNR Tape and Reel, 2500 TPS79428DGNT Tape and Reel, 250 TPS79428DCQR Tape and Reel, 2500

TPS79428DCQ Tube, 78 TPS79430DGNR Tape and Reel, 2500 TPS79430DGNT Tape and Reel, 250 TPS79430DCQR Tape and Reel, 2500

TPS79430DCQ Tube, 78 TPS79433DGNR Tape and Reel, 2500 TPS79433DGNT Tape and Reel, 250 TPS79433DCQR Tape and Reel, 2500

TPS79433DCQ Tube, 78

www.ti.com

θJA

SOT223 SOT223

4in2 Top Side Only

0.5in2 Top Side Only

53°C/W

110°C/W

1 2

CONDITIONS PACKAGE PCB AREA

Condition 1

Condition 2

0 25 50 75

100 125 150

(°C)

(W)

TPS79401, TPS79418 TPS79425, TPS79428 TPS79430, TPS79433

SLVS349D – NOVEMBER 2001 – REVISED OCTOBER 2004

ABSOLUTE MAXIMUM RATINGS

over operating temperature range unless otherwise noted

VINrange -0.3 V to 6 V V

range -0.3 V to VIN+ 0.3 V

range -0.3 V to 6 V

OUT

Peak output current Internally limited ESD rating, HBM 2 kV ESD rating, CDM 500 V Continuous total power dissipation See Dissipation Ratings Table Junction temperature range, T Storage temperature range, T

stg

(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings

only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

PACKAGE DISSIPATION RATINGS

PACKAGE R

DGN 150 8.21 49.97 2.50 W 1.60 W 1.30 W

AIR FLOW TA≤ 25 ° C TA= 70 ° C TA= 85 ° C

(CFM) POWER RATING POWER RATING POWER RATING

θ JC

0 8.47 55.09 2.27 W 1.45 W 1.18 W

250 8.20 48.10 2.60 W 1.66 W 1.35 W

(1)

( ° C/W) R

VALUE

-40 ° C to 150 ° C

-65 ° C to 150 ° C

( ° C/W)

θ JA

Figure 1. SOT223 Power Dissipation

www.ti.com

TPS79401, TPS79418 TPS79425, TPS79428 TPS79430, TPS79433

SLVS349D – NOVEMBER 2001 – REVISED OCTOBER 2004

ELECTRICAL CHARACTERISTICS

Over recommended operating temperature range (T C

= 10µF, C

OUT

Input voltage

Continuous output current 0 250 mA

OUT

Internal reference TPS79401 TJ= 25 ° C 1.220 1.225 1.230 V

Output voltage range TPS79401 V

OUT

Accuracy Output voltage line regulation

( ∆ V

OUT

Load regulation ( ∆ V

Dropout voltage VIN= V

Output current limit V Ground pin current 0 µA < I Shutdown current FB pin current V

Power-supply ripple rejection

Output noise voltage (TPS79428) µV

Time, start-up (TPS79428) RL- 14 Ω , C

High-level enable input voltage 2.7 V < VIN< 5.5 V 1.7 V Low-level enable input voltage 2.7 V < VIN< 5.5 V 0 0.7 V EN pin current V UVLO threshold V UVLO hysteresis 100 mV

= 0.01 µF, unless otherwise noted. Typical values are at 25 ° C.

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

(1)

%/ ∆ VIN)

OUT(nom)

(1)

(2)

- 0.1 V

%/ ∆ I

OUT

) 0 µA < I

OUT

TPS79428 I TPS79430 I TPS79433 I

(3)

OUT

OUT OUT OUT

OUT

EN FB

f = 100 Hz I

TPS79428 f = 10 kHz I

f = 100 kHz I

BW = 100 Hz to 100 kHz, I

EN CC

= -40 ° C to 125 ° C), V

= VIN, V

= V

OUT(nom)

+ 1 V

2.7 5.5 V

+ 1 V ≤ VIN≤ 5.5 V 0 mA ≤ I

≤ 250 mA -3.0 +3.0 %

OUT

+ 1 V < VIN≤ 5.5 V 0.05 0.12 %/V

< 250 mA 10 mV

OUT

= 250 mA 155 210 = 250 mA 155 210 mV = 250 mA 145 200

= 0 V 925 mA

< 250 mA 170 220 µA

OUT

= 0 V 2.7 V < VIN< 5.5 V 0.07 1 µA

= 1.8 V 1 µA

= 250 mA 65

OUT

= 250 mA 60 dB

OUT

= 250 mA 40

OUT

= 0.001 µF 55

= 0.0047 µF 36

= 250 mA

OUT

= 1 µF C

OUT

= 0.01 µF 33

= 0.1 µF 32

= 0.001 µF 50

= 0.0047 µF 70 µs

= 0.01 µF 100

= 0 1 1 µA rising 2.25 2.65 V

(1)

, I

= 1mA,

OUT

5.5 - V

RMS

(1) Minimum VINis 2.7 V or V (2) Dropout is not measured for the TPS79418 and TPS79425 since minimum VIN= 2.7 V. (3) For adjustable versions, this applies only after VINis applied; then V

+ VDO, whichever is greater.

OUT

transitions high to low.

www.ti.com

Thermal

Shutdown

Bandgap

Reference

1.225 V

Current

Sense

GND

OUT

SHUTDOWN

ref

UVLO

ILIM

External to the Device

UVLO

250 kΩ

(1)

(1) Not Available on DCQ (SOT223) options.

Quickstart

Thermal

Shutdown

Current

Sense

GND

OUT

SHUTDOWN

ref

UVLO

ILIM

Bandgap

Reference

1.225 V

UVLO

250 kΩ

Quickstart

R2 = 40k

FUNCTIONAL BLOCK DIAGRAM—ADJUSTABLE VERSION

FUNCTIONAL BLOCK DIAGRAM—FIXED VERSION

TPS79401, TPS79418 TPS79425, TPS79428 TPS79430, TPS79433

SLVS349D – NOVEMBER 2001 – REVISED OCTOBER 2004

TERMINAL

NAME

NR 4 5 Connecting an external capacitor to this pin bypasses noise generated by the internal bandgap. This

EN 6 1 The EN terminal is an input which enables or shuts down the device. When EN goes to a logic high, the

FB 3 5 This terminal is the feedback input voltage for the adjustable device.

GND 5, PAD 3 Regulator ground.

IN 8 2 Unregulated input to the device.

NC 2, 7 No internal connection.

OUT 1 4 Output of the regulator.

DGN DCQ

(MSOP) (SOT223)

Terminal Functions

DESCRIPTION

improves power-supply rejection and reduces output noise.

device will be enabled. When the device goes to a logic low, the device is in shutdown mode.

+ 10 hidden pages