Datasheet

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

GND

OUT

GND

DGNPACKAGE

3mm 5mmMSOP-8PowerPAD

(TOPVIEW)

TPS7A49

+18V

OUT

EN GND

-18V

TPS7A34

IN OUT

EN GND

EVM

+15V

-15V

TPS7A3401

www.ti.com

SBVS163 –JUNE 2011

–

20-V, –200-mA, Low-Noise NEGATIVE VOLTAGE REGULATOR

Check for Samples: TPS7A3401

FEATURES

DESCRIPTION

The TPS7A3401 is a negative, high-voltage (–20 V),

• Input Voltage Range: –3 V to –20 V

low-noise linear regulator capable of sourcing a

• Noise:

maximum load of 200 mA.

– 80 μV

RMS

(10 Hz to 100 kHz)

These linear regulators include a CMOS

• Power-Supply Ripple Rejection:

logic-level-compatible enable pin. Other features

– 50 dB (1 kHz)

available include built-in current limit and thermal

– ≥ 27 dB (10 Hz to 1 MHz)

shutdown protection to safeguard the device and

• Adjustable Output: ~ –1.18 V to –18 V

system during fault conditions.

• Maximum Output Current: 200 mA

The TPS7A3401 is designed using bipolar

• Dropout Voltage: 500 mV at 100 mA

technology, and is ideal for instrumentation

applications where clean voltage rails are critical to

• Stable with Ceramic Capacitors ≥ 2.2 μF

improve system performance. This design makes it a

• CMOS Logic-Level-Compatible Enable Pin

cost-effective choice to power operational amplifiers,

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

analog-to-digital converters (ADCs), digital-to-analog

Shutdown Protection

converters (DACs), and other analog circuitry.

• Available in High Thermal Performance

In addition, the TPS7A3401 linear regulator is

MSOP-8 PowerPAD™ Package

suitable for cost-effective, post dc/dc converter

• Operating Tempature Range: –40°C to +125°C

regulation. By filtering out the output voltage ripple

inherent to dc/dc switching conversion, increased

APPLICATIONS

system performance is provided in instrumentation

• Cost-Effective Supply Rails for Op Amps,

applications.

DACs, ADCs, and Other High-Precision Analog

Circuitry

Typical Application

• Cost-Effective Post DC/DC Converter

Regulation and Ripple Filtering

Post DC/DC Converter Regulation

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 (18 pages)

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TPS7A3401 SBVS163 – JUNE 2011 www.ti.com –20-V, –200-mA, Low-Noise NEGATIVE VOLTAGE REGULATOR Check for Samples: TPS7A3401 FEATURES DESCRIPTION • • The TPS7A3401 is a negative, high-voltage (–20 V), low-noise linear regulator capable of sourcing a maximum load of 200 mA. 1 23 • • • • • • • • • Input Voltage Range: –3 V to –20 V Noise: – 80 μVRMS (10 Hz to 100 kHz) Power-Supply Ripple Rejection: – 50 dB (1 kHz) – ≥ 27 dB (10 Hz to 1 MHz) Adjustable Output: ~ –1.
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TPS7A3401 SBVS163 – JUNE 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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TPS7A3401 SBVS163 – JUNE 2011 www.ti.com ELECTRICAL CHARACTERISTICS (1) At TJ = –40°C to +125°C, |VIN| = |VOUT(NOM)| + 1.0 V or |VIN| = 3.0 V (whichever is greater), VEN = VIN, IOUT = 1 mA, CIN = 2.2 µF, COUT = 2.2 µF, and the FB pin tied to OUT, unless otherwise noted. TPS7A3401 PARAMETER VIN Input voltage range VREF Internal reference TEST CONDITIONS MIN TYP –20.0 TJ = +25°C, VFB = VREF (2) –1.184 UNIT –3.0 V –1.166 V –18.0 VREF V Nominal accuracy TJ = +25°C, |VIN| = |VOUT(NOM)| + 0.
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TPS7A3401 SBVS163 – JUNE 2011 www.ti.
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TPS7A3401 SBVS163 – JUNE 2011 www.ti.com PIN CONFIGURATION DGN PACKAGE MSOP-8 (TOP VIEW) OUT FB GND GND 1 2 3 4 8 7 6 5 IN GND GND EN PIN DESCRIPTIONS PIN NO. NAME 1 OUT 2 FB 3, 4, 6, 7 GND 5 EN This pin turns the regulator on or off. If VEN ≥ V+EN_HI or VEN ≤ V–EN_HI, the regulator is enabled. If V+EN_LO ≥ VEN ≥ V–EN_LO, the regulator is disabled. The EN pin can be connected to IN, if not used. |VEN| ≤ |VIN|. 8 IN Input supply PowerPAD DESCRIPTION Regulator output.
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TPS7A3401 SBVS163 – JUNE 2011 www.ti.com TYPICAL CHARACTERISTICS At TJ = –40°C to +125°C, |VIN| = |VOUT(NOM)| + 1.0 V or |VIN| = 3.0 V (whichever is greater), VEN = VIN, IOUT = 1 mA, CIN = 2.2 μF, COUT = 2.2 μF, and the FB pin tied to OUT, unless otherwise noted. FEEDBACK VOLTAGE vs INPUT VOLTAGE FEEDBACK CURRENT vs TEMPERATURE 100 -1.165 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 0 -1.
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TPS7A3401 SBVS163 – JUNE 2011 www.ti.com TYPICAL CHARACTERISTICS (continued) At TJ = –40°C to +125°C, |VIN| = |VOUT(NOM)| + 1.0 V or |VIN| = 3.0 V (whichever is greater), VEN = VIN, IOUT = 1 mA, CIN = 2.2 μF, COUT = 2.2 μF, 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.
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TPS7A3401 SBVS163 – JUNE 2011 www.ti.com TYPICAL CHARACTERISTICS (continued) At TJ = –40°C to +125°C, |VIN| = |VOUT(NOM)| + 1.0 V or |VIN| = 3.0 V (whichever is greater), VEN = VIN, IOUT = 1 mA, CIN = 2.2 μF, COUT = 2.2 μF, and the FB pin tied to OUT, unless otherwise noted. ENABLE THRESHOLD VOLTAGE vs TEMPERATURE LINE REGULATION 1 2 ON 1.5 +125°C +105°C +85°C +25°C -40°C 0.8 0.6 1 VOUT(NOM) (%) 0.4 VEN (V) 0.5 0 OFF -0.5 0.2 0 -0.2 -0.4 -1 -0.6 -1.5 -0.
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TPS7A3401 SBVS163 – JUNE 2011 www.ti.com THEORY OF OPERATION GENERAL DESCRIPTION The TPS7A3401 belongs to a new generation of linear regulators that use an innovative bipolar process to achieve low noise and 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 analog applications.
PAGE 10
TPS7A3401 SBVS163 – JUNE 2011 www.ti.com APPLICATION INFORMATION POWER FOR PRECISION ANALOG One of the primary TPS7A3401 applications is to provide low-noise voltage rails to analog circuitry in order to improve system accuracy and precision. The TPS7A3401 negative high-voltage linear regulator provides a low-noise voltage rail to analog circuitry, such as operational amplifiers, ADCs, and DACs.
PAGE 11
TPS7A3401 SBVS163 – JUNE 2011 www.ti.com LAYOUT PACKAGE MOUNTING Solder pad footprint recommendations for the TPS7A3401 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 12
PACKAGE OPTION ADDENDUM www.ti.
PAGE 13
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant TPS7A3401DGNR MSOPPower PAD DGN 8 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 TPS7A3401DGNT MSOPPower PAD DGN 8 250 180.0 12.4 5.3 3.4 1.4 8.0 12.
PAGE 14
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS7A3401DGNR MSOP-PowerPAD DGN 8 2500 367.0 367.0 35.0 TPS7A3401DGNT 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.