Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - LDO voltage regulator Negative, adjustable MSOP 8 PowerPad

GND

OUT

NR/SS

DNC

DGNPACKAGE

3mm 5mmMSOP-8PowerPAD

(TOPVIEW)

TPS7A3001-EP

www.ti.com

SBVS174 –OCTOBER 2011

–

36V, –200mA, ULTRALOW-NOISE, NEGATIVE LINEAR REGULATOR

FEATURES

APPLICATIONS

• Input Voltage Range: –3V to –36V

• Supply Rails for Op Amps, DACs, ADCs, and

Other High-Precision Analog Circuitry

• Noise:

• Audio

– 14μV

RMS

(20Hz to 20kHz)

• Post DC/DC Converter Regulation and Ripple

– 15.1μV

RMS

(10Hz to 100kHz)

Filtering

• Power-Supply Ripple Rejection:

• Test and Measurement

– 72dB (120Hz)

• RX, TX, and PA Circuitry

– ≥ 55dB (10Hz to 700kHz)

• Industrial Instrumention

• Adjustable Output: –1.18V to –35V

• Base Stations and Telecom Infrastrucure

• Maximum Output Current: 200mA

• –12V and –24V Industrial Buses

• Dropout Voltage: 216mV at 100mA

• Stable with Ceramic Capacitors ≥ 2.2μF

• CMOS Logic-Level-Compatible Enable Pin

SUPPORTS DEFENSE, AEROSPACE,

• Built-In, Fixed, Current-Limit and Thermal

AND MEDICAL APPLICATIONS

Shutdown Protection

• Controlled Baseline

• Available in High Thermal Performance

• One Assembly/Test Site

MSOP-8 PowerPAD™ Package

• One Fabrication Site

• Available in Military (–55°C/125°C)

Temperature Range

• Extended Product Life Cycle

• Extended Product-Change Notification

• Product Traceability

DESCRIPTION

The TPS7A3001 is a negative, high-voltage (–36V), ultralow-noise (15.1μV

RMS

, 72dB PSRR) linear regulator

capable of sourcing a maximum load of 200mA.

These linear regulators include a CMOS logic-level-compatible enable pin and capacitor-programmable soft-start

function that allows for customized power-management schemes. Other features available include built-in current

limit and thermal shutdown protection to safeguard the device and system during fault conditions.

The TPS7A3001 is designed using bipolar technology, and is ideal for high-accuracy, high-precision

instrumentation applications where clean voltage rails are critical to maximize system performance. This design

makes it an excellent choice to power operational amplifiers, analog-to-digital converters (ADCs),

digital-to-analog converters (DACs), and other high-performance analog circuitry.

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.

2PowerPAD is a trademark of Texas Instruments.

3All 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.

Summary of content (25 pages)

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TPS7A3001-EP SBVS174 – OCTOBER 2011 www.ti.com –36V, –200mA, ULTRALOW-NOISE, NEGATIVE LINEAR REGULATOR FEATURES APPLICATIONS • • • 1 23 • • • • • • • • Input Voltage Range: –3V to –36V Noise: – 14μVRMS (20Hz to 20kHz) – 15.1μVRMS (10Hz to 100kHz) Power-Supply Ripple Rejection: – 72dB (120Hz) – ≥ 55dB (10Hz to 700kHz) Adjustable Output: –1.18V to –35V Maximum Output Current: 200mA Dropout Voltage: 216mV at 100mA Stable with Ceramic Capacitors ≥ 2.
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TPS7A3001-EP SBVS174 – OCTOBER 2011 www.ti.com In addition, the TPS7A3001 of linear regulators is suitable for post dc/dc converter regulation. By filtering out the output voltage ripple inherent to dc/dc switching conversion, maximum system performance is provided in sensitive instrumentation, test and measurement, audio, and RF applications.
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TPS7A3001-EP SBVS174 – OCTOBER 2011 www.ti.com 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.
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TPS7A3001-EP SBVS174 – OCTOBER 2011 www.ti.com ELECTRICAL CHARACTERISTICS (1) At TJ = –55°C to +125°C, |VIN| = |VOUT(NOM)| + 1.0V or |VIN| = 3.0V (whichever is greater), VEN = VIN, IOUT = 1mA, CIN = 2.2µF, COUT = 2.2µF, CNR/SS = 0nF, and the FB pin tied to OUT, unless otherwise noted. PARAMETER TEST CONDITIONS MIN TYP MAX –3.0 V –1.184 –1.142 V –36.0 UNIT VIN Input voltage range VREF Internal reference VNR/SS = VREF –1.22 Output voltage range (2) |VIN| ≥ |VOUT(NOM)| + 1.0V –35.
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TPS7A3001-EP SBVS174 – OCTOBER 2011 www.ti.
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TPS7A3001-EP SBVS174 – OCTOBER 2011 www.ti.com PIN CONFIGURATION DGN PACKAGE MSOP-8 (TOP VIEW) OUT FB NC GND 1 2 3 4 8 7 6 5 IN DNC NR/SS EN PIN DESCRIPTIONS NAME NO. OUT 1 Regulator output. A capacitor ≥ 2.2µF must be tied from this pin to ground to assure stability. FB 2 This pin is the input to the control-loop error amplifier. It is used to set the output voltage of the device. NC 3 Not internally connected. This pin must either be left open or tied to GND.
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TPS7A3001-EP SBVS174 – OCTOBER 2011 www.ti.com TYPICAL CHARACTERISTICS At TJ = –55°C to +125°C, |VIN| = |VOUT(NOM)| + 1.0V or |VIN| = 3.0V (whichever is greater), VEN = VIN, IOUT = 1mA, CIN = 2.2μF, COUT = 2.2μF, CNR/SS = 0nF, and the FB pin tied to OUT, unless otherwise noted. FEEDBACK VOLTAGE vs INPUT VOLTAGE FEEDBACK CURRENT vs TEMPERATURE -1.165 100 90 80 70 IFB (nA) VFB (V) -1.17 -1.175 +125°C +105°C +85°C +25°C -40°C -1.18 60 50 40 30 20 10 -1.
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TPS7A3001-EP SBVS174 – OCTOBER 2011 www.ti.com TYPICAL CHARACTERISTICS (continued) At TJ = –55°C to +125°C, |VIN| = |VOUT(NOM)| + 1.0V or |VIN| = 3.0V (whichever is greater), VEN = VIN, IOUT = 1mA, CIN = 2.2μF, COUT = 2.2μF, CNR/SS = 0nF, and the FB pin tied to OUT, unless otherwise noted. QUIESCENT CURRENT vs INPUT VOLTAGE SHUTDOWN CURRENT vs INPUT VOLTAGE 100 3.5 90 +125°C +105°C +85°C +25°C -40°C 3 80 2.5 ISHDN (mA) IQ (mA) 70 60 50 40 +125°C +105°C +85°C +25°C -40°C 30 20 IOUT = 0mA 10 1.
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TPS7A3001-EP SBVS174 – OCTOBER 2011 www.ti.com TYPICAL CHARACTERISTICS (continued) At TJ = –55°C to +125°C, |VIN| = |VOUT(NOM)| + 1.0V or |VIN| = 3.0V (whichever is greater), VEN = VIN, IOUT = 1mA, CIN = 2.2μF, COUT = 2.2μF, CNR/SS = 0nF, and the FB pin tied to OUT, unless otherwise noted. ENABLE THRESHOLD VOLTAGE vs TEMPERATURE POWER-SUPPLY REJECTION RATIO vs COUT 90 2 ON 80 1 70 0.5 60 0 PSRR (dB) VEN (V) 1.5 OFF -0.5 50 40 30 -1 -1.
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TPS7A3001-EP SBVS174 – OCTOBER 2011 www.ti.com TYPICAL CHARACTERISTICS (continued) At TJ = –55°C to +125°C, |VIN| = |VOUT(NOM)| + 1.0V or |VIN| = 3.0V (whichever is greater), VEN = VIN, IOUT = 1mA, CIN = 2.2μF, COUT = 2.2μF, CNR/SS = 0nF, and the FB pin tied to OUT, unless otherwise noted. Output Spectral Noise Density (mV/ÖHz) OUTPUT SPECTRAL NOISE DENSITY vs OUTPUT CURRENT 10 VOUT = -1.2V VIN = -3V CNR/SS = 10nF COUT = 10mF 1 RMS NOISE IOUT 10Hz to 100kHz 100Hz to 100kHz 1mA 15.13 14.
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TPS7A3001-EP SBVS174 – OCTOBER 2011 www.ti.com TYPICAL CHARACTERISTICS (continued) At TJ = –55°C to +125°C, |VIN| = |VOUT(NOM)| + 1.0V or |VIN| = 3.0V (whichever is greater), VEN = VIN, IOUT = 1mA, CIN = 2.2μF, COUT = 2.2μF, CNR/SS = 0nF, and the FB pin tied to OUT, unless otherwise noted. CAPACITOR-PROGRAMMABLE SOFT START VOUT = -1.2V VIN = -3V IOUT = 1mA CIN = COUT = 2.2mF CNR/SS = 0pF VOUT 1V/div 1V/div CAPACITOR-PROGRAMMABLE SOFT START VEN VOUT = -1.2V VIN = -3V IOUT = 1mA CIN = COUT = 2.
PAGE 12
TPS7A3001-EP SBVS174 – OCTOBER 2011 www.ti.com TYPICAL CHARACTERISTICS (continued) At TJ = –55°C to +125°C, |VIN| = |VOUT(NOM)| + 1.0V or |VIN| = 3.0V (whichever is greater), VEN = VIN, IOUT = 1mA, CIN = 2.2μF, COUT = 2.2μF, CNR/SS = 0nF, and the FB pin tied to OUT, unless otherwise noted. 50mV/div 200mA/div LOAD TRANSIENT RESPONSE IOUT VOUT VIN = -3.0V IOUT = 1mA to 200mA COUT = 2.2mF Time (100ms/div) Figure 29.
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TPS7A3001-EP SBVS174 – OCTOBER 2011 www.ti.com THEORY OF OPERATION GENERAL DESCRIPTION The TPS7A3001 belongs to a family of new generation linear regulators that use an innovative bipolar process to achieve ultralow-noise and very high PSRR levels at a wide input voltage range. These features, combined with a high thermal performance MSOP-8 with PowerPAD package make this device ideal for high-performance analog applications. ADJUSTABLE OPERATION The TPS7A3001 has an output voltage range of –1.
PAGE 14
TPS7A3001-EP SBVS174 – OCTOBER 2011 www.ti.com CAPACITOR RECOMMENDATIONS Low ESR capacitors should be used for the input, output, noise reduction, and bypass capacitors. Ceramic capacitors with X7R and X5R dielectrics are preferred. These dielectrics offer more stable characteristics. Ceramic X7R capacitors offer improved over-temperature performance, while ceramic X5R capacitors are the most cost-effective and are available in higher values. Note that high ESR capacitors may degrade PSRR.
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TPS7A3001-EP SBVS174 – OCTOBER 2011 www.ti.com APPLICATION INFORMATION POWER FOR PRECISION ANALOG One of the primary TPS7A3001 applications is to provide ultralow noise voltage rails to high-performance analog circuitry in order to maximize system accuracy and precision.
PAGE 16
TPS7A3001-EP SBVS174 – OCTOBER 2011 www.ti.com LAYOUT PACKAGE MOUNTING Solder pad footprint recommendations for the TPS7A3001 are available at the end of this product datasheet and at www.ti.com. BOARD LAYOUT RECOMMENDATIONS TO IMPROVE PSRR AND NOISE PERFORMANCE To improve ac performance such as PSRR, output noise, and transient response, it is recommended that the board be designed with separate ground planes for IN and OUT, with each ground plane connected only at the GND pin of the device.
PAGE 17
TPS7A3001-EP SBVS174 – OCTOBER 2011 www.ti.com The GND pin should be tied directly to the PowerPAD under the IC. The PowerPAD should be connected to any internal PCB ground planes using multiple vias directly under the IC. It may be possible to obtain acceptable performance with alternate PCB layouts; however, the layout shown in Figure 33 and the schematic shown in Figure 34 have been shown to produce good results and are meant as a guideline. Figure 33.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 17-Dec-2011 TAPE AND REEL INFORMATION *All dimensions are nominal Device TPS7A3001MDGNTEP Package Package Pins Type Drawing MSOPPower PAD DGN 8 SPQ 250 Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 180.0 12.4 Pack Materials-Page 1 5.3 B0 (mm) K0 (mm) P1 (mm) 3.4 1.4 8.0 W Pin1 (mm) Quadrant 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 17-Dec-2011 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS7A3001MDGNTEP MSOP-PowerPAD DGN 8 250 210.0 185.0 35.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.