TPS79301, TPS79318 TPS79325, TPS79328, TPS793285 TPS79330, TPS79333, T
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TPS79301, TPS79318 TPS79325, TPS79328, TPS793285 TPS79330, TPS79333, TPS793475
SLVS348G JULY 2001 REVISED JUNE 2004
ULTRALOW-NOISE, HIGH PSRR, FAST 200-mA LOW-DROPOUT LINEAR REGULATORS NANOSTARWAFER CHIP SCALE SOT23
FEATURES
200-mA Low-Dropout Regulator With Enable Available 1.8-V, 2.5-V, 2.8-V, 2.85-V, 3-V, 3.3-V, 4.75-V, (1.22 High PSRR kHz) Ultralow Noise Fast Start-Up Time Stable With 2.2-µF Ceramic Capacitor Excellent Load/Line Transient Response Very Dropout Voltage (112 Full Load, TPS79330) 5-Pin SOT23 (DBV) NanoStar Wafer Chip Scale (YEQ) Packages
DESCRIPTION
TPS793xx family low-dropout (LDO) low-power linear voltage regulators features high power supply rejection ratio (PSRR), ultralow noise, fast start-up, excellent line load transient responses NanoStar wafer chip scale SOT23 packages. NanoStar packaging gives ultrasmall footprint well ultralow profile package weight, making ideal portable applications such handsets PDAs. Each device family stable, with small 2.2-µF ceramic capacitor output. TPS793xx family uses advanced, proprietary BiCMOS fabrication process yield extremely dropout voltages (e.g., TPS79330). Each device achieves fast start-up times (approximately with 0.001-µF bypass capacitor) while consuming very quiescent current (170 typical). Moreover, when device placed standby mode, supply current reduced less than TPS79328 exhibits approximately µVRMS output voltage noise with 0.1-µF bypass capacitor. Applications with analog components that noise sensitive, such portable electronics, benefit from high PSRR low-noise features well fast response time.
TPS79328
APPLICATIONS
VCOs, Receivers, ADCs Audio Cellular Cordless Telephones BluetoothTM, Wireless Handheld Organizers, PDAs
PACKAGE (TOP VIEW) BYPASS
TPS79328
OUTPUT SPECTRAL NOISE DENSITY FREQUENCY
C(byp)
RIPPLE REJECTION FREQUENCY
Ripple Rejection C(byp) 0.01
Fixed Option PACKAGE (TOP VIEW) BYPASS
0.25
Output Spectral Noise Density
0.15 0.05
Adjustable Option PACKAGE (TOP VIEW)
Frequency
Frequency
Please aware that important notice concerning availability, standard warranty, critical applications Texas Instruments semiconductor products disclaimers thereto appears this data sheet. Bluetooth trademark Bluetooth Sig, Inc. NANOSTAR trademark Texas Instruments.
UNLESS OTHERWISE NOTED this document contains PRODUCTION DATA information current publication date. Products conform specifications terms Texas Instruments standard warranty. Production processing does necessarily include testing parameters.
Copyright 2001-2004, Texas Instruments Incorporated
TPS79301, TPS79318 TPS79325, TPS79328, TPS793285 TPS79330, TPS79333, TPS793475
SLVS348G JULY 2001 REVISED JUNE 2004
AVAILABLE OPTIONS
VOLTAGE 1.22 -40°C 125°C 2.85 2.85 4.75 PACKAGE SOT23 (DBV) (YEQ) SOT23 (DBV) (YEQ) SOT23 (DBV) (YEQ) SOT23 (DBV) (YEQ) SOT23 (DBV) (YEQ) SOT23 (DBV) PART NUMBER TPS79301DBVR TPS79318DBVR TPS79318YEQ TPS79325DBVR TPS79325YEQ TPS79328DBVR TPS79328YEQ TPS793285DBVR TPS793285YEQ TPS79330DBVR TPS79330YEQ TPS79333DBVR TPS793475DBVR SYMBOL PGVI PHHI PGWI PGXI PHII PGYI PHUI PHJI
DBVR indicates tape reel 3000 parts. YEQR indicates tape reel 3000 parts. YEQT indicates tape reel parts.
ABSOLUTE MAXIMUM RATINGS
over operating temperature range (unless otherwise noted)
UNIT range range VOUT range Peak output current rating, rating, Continuous total power dissipation Operating junction temperature range, package Operating junction temperature range, package Storage temperature range, Tstg -0.3 -0.3 -0.3 Internally limited Dissipation Ratings Table -40°C 150°C -40°C 125°C -65°C 150°C
Stresses beyond those listed under absolute maximum ratings cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated under recommended operating conditions implied. Exposure absolute-maximum-rated conditions extended periods affect device reliability.
DISSIPATION RATINGS TABLE
BOARD Low-K High-K Low-K High-K PACKAGE 65°C/W 65°C/W 27°C/W 27°C/W 255°C/W 180°C/W 255°C/W 190°C/W DERATING FACTOR ABOVE 25°C mW/°C mW/°C mW/°C mW/°C 25°C POWER RATING 70°C POWER RATING 85°C POWER RATING
JEDEC low-K (1s) board design used derive this data 3-inch 3-inch, layer board with ounce copper traces board. JEDEC high-K (2s2p) board design used derive this data 3-inch 3-inch, multilayer board with ounce internal power ground planes ounce copper traces bottom board.
TPS79301, TPS79318 TPS79325, TPS79328, TPS793285 TPS79330, TPS79333, TPS793475
SLVS348G JULY 2001 REVISED JUNE 2004
ELECTRICAL CHARACTERISTICS
over recommended operating temperature range VIN, VOUT(nom) (1), IOUT= COUT CBYPASS 0.01 (unless otherwise noted). Typical values 25°C.
PARAMETER Input voltage
TEST CONDITIONS
1.201
UNIT
IOUT Continuous output current Internal reference (TPS79301) Output voltage range (TPS79301) Operating junction temperature TPS79318 TPS79325 TPS79328 Output voltage TPS793285 TPS79330 TPS79333 TPS793475 Quiescent current (GND current) Load regulation (VOUT%/IOUT) Line regulation (VOUT%/VIN)
1.225
1.250
IOUT IOUT IOUT IOUT IOUT IOUT IOUT IOUT IOUT VOUT
3.85 5.25 25°C CBYPASS 0.001
1.764 2.45 2.744 2.793 2.94 3.234 4.655
2.85 4.75 0.05
1.836 2.55 2.856 2.907 3.06 3.366 4.845 0.12
Output noise voltage (TPS79328)
kHz, IOUT
CBYPASS 0.0047 CBYPASS 0.01 CBYPASS CBYPASS 0.001
µVRMS
Time, start-up (TPS79328) Output current limit Standby current High level enable input voltage level enable input voltage Input current (EN) Input current (FB) (TPS79301)
COUT VOUT
CBYPASS 0.0047 CBYPASS 0.01
25°C, IOUT IOUT IOUT IOUT
0.07
2.65
Power supply ripple rejection
TPS79328
25°C, kHz, 25°C, kHz, 25°C, IOUT IOUT IOUT IOUT IOUT rising
TPS79328 Dropout voltage (VIN VOUT(typ) 0.1V) TPS793285 TPS79330 TPS79333 TPS793475 UVLO threshold UVLO hysteresis
2.25
Minimum VOUT VDO, whichever greater. Dropout measured TPS79318 TPS79325 since minimum
TPS79301, TPS79318 TPS79325, TPS79328, TPS793285 TPS79330, TPS79333, TPS793475
SLVS348G JULY 2001 REVISED JUNE 2004
FUNCTIONAL BLOCK DIAGRAMS ADJUSTABLE VERSION
UVLO 2.45V Current Sense ILIM
UVLO Thermal Shutdown Bandgap Reference 1.22V
SHUTDOWN
QuickStart Vref
External Device Bypass
FIXED VERSION
UVLO 2.45V UVLO Thermal Shutdown QuickStart Bandgap Reference 1.22V Vref Current Sense ILIM SHUTDOWN
Bypass
Terminal Functions
TERMINAL NAME BYPASS SOT23 SOT23 FIXED FIXED DESCRIPTION external bypass capacitor, connected this terminal conjunction with internal resistor, creates low-pass filter further reduce regulator noise. terminal input which enables shuts down device. When goes logic high, device will enabled. When device goes logic low, device shutdown mode. This terminal feedback input voltage adjustable device. Regulator ground Unregulated input device. Output regulator.
TPS79301, TPS79318 TPS79325, TPS79328, TPS793285 TPS79330, TPS79333, TPS793475
SLVS348G JULY 2001 REVISED JUNE 2004
TYPICAL CHARACTERISTICS (SOT23 PACKAGE)
TPS79328 OUTPUT VOLTAGE OUTPUT CURRENT
2.805 2.804 2.803 Output Voltage 2.802 2.801 2.799 2.798 2.797 2.796 2.795 Output Current 2.775 2.805 Output Voltage 2.795
TPS79328 OUTPUT VOLTAGE JUNCTION TEMPERATURE
TPS79328 GROUND CURRENT JUNCTION TEMPERATURE
Ground Current
2.79 2.785
2.78
Junction Temperature Junction Temperature
Figure TPS79328 OUTPUT SPECTRAL NOISE DENSITY FREQUENCY
C(byp)
Figure TPS79328 OUTPUT SPECTRAL NOISE DENSITY FREQUENCY
C(byp)
Figure TPS79328 OUTPUT SPECTRAL NOISE DENSITY FREQUENCY
C(byp) 0.001 C(byp) 0.0047 C(byp) 0.01 C(byp)
0.25
0.25 0.15
Output Spectral Noise Density
Output Spectral Noise Density
0.15
0.05
0.05
Frequency
Output Spectral Noise Density
Frequency
Frequency
Figure ROOT MEAN SQUARE OUTPUT NOISE BYPASS CAPACITANCE
Root Mean Squared Output Noise V(RMS) 0.001 0.01 C(byp) Bypass Capacitance
Figure
Figure TPS79328 DROPOUT VOLTAGE JUNCTION TEMPERATURE
Dropout Voltage
OUTPUT IMPEDANCE FREQUENCY
Output Impedance
Frequency
Junction Temperature
Figure
Figure
Figure
TPS79301, TPS79318 TPS79325, TPS79328, TPS793285 TPS79330, TPS79333, TPS793475
SLVS348G JULY 2001 REVISED JUNE 2004
TYPICAL CHARACTERISTICS (SOT23 PACKAGE) (continued)
TPS79328 RIPPLE REJECTION FREQUENCY
Ripple Rejection C(byp) 0.01 Ripple Rejection Frequency C(byp) 0.01
TPS79328 RIPPLE REJECTION FREQUENCY
Ripple Rejection
TPS79328 RIPPLE REJECTION FREQUENCY
C(byp)
Frequency
Frequency
Figure TPS79328 OUTPUT VOLTAGE, ENABLE VOLTAGE TIME (START-UP)
Output Voltage Enable Voltage C(byp) 0.001 Time C(byp) 0.0047 C(byp) 0.01 25°C
Figure
Figure
TPS79328 LINE TRANSIENT RESPONSE
Change Output Voltage
TPS79328 LOAD TRANSIENT RESPONSE
C(byp) 0.01
Output Voltage
Input Voltage
Output Current
0.02A
Time
Time
Figure
Figure
Figure
TPS79301, TPS79318 TPS79325, TPS79328, TPS793285 TPS79330, TPS79333, TPS793475
SLVS348G JULY 2001 REVISED JUNE 2004
TYPICAL CHARACTERISTICS (SOT23 PACKAGE) (continued)
DROPOUT VOLTAGE OUTPUT CURRENT
Dropuoy Voltage
POWER POWER DOWN
TPS79301 DROPOUT VOLTAGE INPUT VOLTAGE
Dropout Voltage
125°C 25°C -55°C
125°C
mV/div
25°C
-40°C
1s/div Output Current
Input Voltage
Figure
Figure TYPICAL REGIONS STABILITY EQUIVALENT SERIES RESISTANCE (ESR) OUTPUT CURRENT
-40°C 125°C Region Instability
Figure TYPICAL REGIONS STABILITY EQUIVALENT SERIES RESISTANCE (ESR) OUTPUT CURRENT
-40°C 125°C Region Instability
MINIMUM REQUIRED INPUT VOLTAGE OUTPUT VOLTAGE
Minimum Required Input Voltage 125°C 25°C -40°C
Equivalent Series Resistance
Equivalent Series Resistance
Region Stability 0.01 0.02 0.04 0.06 0.08 Output Current
Region Stability
0.01 0.02 0.04 0.06 0.08 Output Current
1.75
2.25
2.75
3.25
Output Voltage
Figure
Figure
Figure
TPS79301, TPS79318 TPS79325, TPS79328, TPS793285 TPS79330, TPS79333, TPS793475
SLVS348G JULY 2001 REVISED JUNE 2004
APPLICATION INFORMATION
TPS793xx family low-dropout (LDO) regulators been optimized noise-sensitive battery-operated equipment. device features extremely dropout voltages, high PSRR, ultralow output noise, quiescent current (170 typically), enable-input reduce supply currents less than when regulator turned off. typical application circuit shown Figure
TPS793xx
BYPASS
VOUT 0.01
Figure Typical Application Circuit
External Capacitor Requirements
0.1-µF larger ceramic input bypass capacitor, connected between located close TPS793xx, required stability improves transient response, noise rejection, ripple rejection. higher-value input capacitor necessary large, fast-rise-time load transients anticipated device located several inches from power source. Like most dropout regulators, TPS793xx requires output capacitor connected between stabilize internal control loop. minimum recommended capacitance 2.2-µF larger ceramic capacitor suitable, provided capacitance does vary significantly over temperature. load current expected exceed 1.0-µF ceramic capacitor used. internal voltage reference source noise regulator. TPS793xx BYPASS which connected voltage reference through 250-k internal resistor. 250-k internal resistor, conjunction with external bypass capacitor connected BYPASS pin, creates pass filter reduce voltage reference noise and, therefore, noise regulator output. order regulator operate properly, current flow BYPASS must minimum, because leakage current creates drop across internal resistor thus creating output error. Therefore, bypass capacitor must have minimal leakage current. bypass capacitor should more than 0.1-µF ensure that fully charged during quickstart time provided internal switch shown Functional Block Diagrams example, TPS79328 exhibits only µVRMS output voltage noise using 0.1-µF ceramic bypass capacitor 2.2-µF ceramic output capacitor. Note that output starts slower bypass capacitance increases time constant BYPASS that created internal 250-k resistor external capacitor.
Board Layout Recommendation Improve PSRR Noise Performance
improve measurements like PSRR, output noise, transient response, recommended that board designed with separate ground planes VOUT, with each ground plane connected only device. addition, ground connection bypass capacitor should connect directly device.
TPS79301, TPS79318 TPS79325, TPS79328, TPS793285 TPS79330, TPS79333, TPS793475
SLVS348G JULY 2001 REVISED JUNE 2004
APPLICATION INFORMATION (continued) Power Dissipation Junction Temperature
Specified regulator operation assured junction temperature 125°C; maximum junction temperature should restricted 125°C under normal operating conditions. This restriction limits power dissipation regulator handle given application. ensure junction temperature within acceptable limits, calculate maximum allowable dissipation, PD(max), actual dissipation, which must less than equal PD(max). maximum power dissipation limit determined using Equation D(max) Where:
TJmax maximum allowable junction temperature. thermal resistance junction-to-ambient package (see Dissipation Ratings Table). ambient temperature.
regulator dissipation calculated using Equation VIN*V
Power dissipation resulting from quiescent current negligible. Excessive power dissipation triggers thermal protection circuit.
Programming TPS79301 Adjustable Regulator
output voltage TPS79301 adjustable regulator programmed using external resistor divider shown Figure output voltage calculated using Equation
VREF
Where:
VREF 1.2246 (the internal reference voltage)
Resistors should chosen approximately 50-µA divider current. Lower value resistors used improved noise performance, solution consumes more power. Higher resistor values should avoided leakage current into/out across R1/R2 creates offset voltage that artificially increases/decreases feedback voltage thus erroneously decreases/increases VOUT. recommended design procedure choose 30.1 divider current stability, then calculate using Equation Vref
order improve stability adjustable version, suggested that small compensation capacitor placed between voltages <1.8 value this capacitor should voltages >1.8 approximate value this capacitor calculated shown Equation 10*7) suggested value this capacitor several resistor ratios shown table below. this capacitor used (such unity-gain configuration) output voltage <1.8 chosen, then minimum recommended output capacitor instead
TPS79301, TPS79318 TPS79325, TPS79328, TPS793285 TPS79330, TPS79333, TPS793475
SLVS348G JULY 2001 REVISED JUNE 2004
APPLICATION INFORMATION (continued)
TPS79301 0.01 BYPASS Optional improved noise VOUT OUTPUT VOLTAGE 1.22 short open OUTPUT VOLTAGE PROGRAMMING GUIDE
31.6 30.1 30.1 30.1
Figure TPS79301 Adjustable Regulator Programming
Regulator Protection
TPS793xx PMOS-pass transistor built-in back diode that conducts reverse current when input voltage drops below output voltage (e.g., during power down). Current conducted from output input internally limited. extended reverse voltage operation anticipated, external limiting might appropriate. TPS793xx features internal current limiting thermal protection. During normal operation, TPS793xx limits output current approximately When current limiting engages, output voltage scales back linearly until overcurrent condition ends. While current limiting designed prevent gross device failure, care should taken exceed power dissipation ratings package absolute maximum voltage ratings device. temperature device exceeds approximately 165°C, thermal-protection circuitry shuts down. Once device cooled down below approximately 140°C, regulator operation resumes.
TPS79301, TPS79318 TPS79325, TPS79328, TPS793285 TPS79330, TPS79333, TPS793475
SLVS348G JULY 2001 REVISED JUNE 2004
APPLICATION INFORMATION (continued) TPS793xxYEQ NanoStarWafer Chip Scale Information
0,79 0,84
1,30 1,34
0.625
NOTES: linear dimensions millimeters. This drawing subject change without notice. NanoStarpackage configuration. This package tin-lead (SnPb), consult factory availability lead-free material. NanoStar trademark Texas Instruments.
Figure NanoStarWafer Chip Scale Package
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