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TPS74701

GND

IN PG

BIAS

OUT

BIAS

OUT

0.5V/div

OUT

1V/div

Time(2ms/div)

=5600pF

=560pF

=0nF

3.8V

1.8V

TPS74701

www.ti.com

SBVS099F –NOVEMBER 2007–REVISED NOVEMBER 2010

500mA Low-Dropout Linear Regulator with Programmable Soft-Start

Check for Samples: TPS74701

FEATURES

• V

OUT

Range: 0.8V to 3.6V

DESCRIPTION

• Ultralow V

Range: 0.8V to 5.5V

The TPS74701 low-dropout (LDO) linear regulator

• V

BIAS

Range 2.7V to 5.5V

provides an easy-to-use, robust power management

• Low Dropout: 50mV typ at 500mA, V

BIAS

= 5V

solution for a wide variety of applications.

User-programmable soft-start minimizes stress on the

• Power Good (PG) Output Allows Supply

input power source by reducing capacitive inrush

Monitoring or Provides a Sequencing Signal

current on start-up. The soft-start is monotonic and

for Other Supplies

well-suited for powering many different types of

• 2% Accuracy Over Line/Load/Temperature

processors and ASICs. The enable input and power

• Programmable Soft-Start Provides Linear

good output allow easy sequencing with external

Voltage Startup

regulators. This complete flexibility permits the user to

configure a solution that meets the sequencing

• V

BIAS

Permits Low V

Operation with Good

requirements of FPGAs, DSPs, and other

Transient Response

applications with special start-up requirements.

• Stable with Any Output Capacitor ≥ 2.2mF

A precision reference and error amplifier deliver 2%

• Available in a Small 3mm × 3mm × 1mm

accuracy over load, line, temperature, and process.

SON-10 Package

The device is stable with any type of capacitor

greater than or equal to 2.2mF, and is fully specified

APPLICATIONS

from –40°C to +125°C. The TPS74701 is offered in a

• FPGA Applications

small 3mm × 3mm SON-10 package for compatibility

with the TPS74801.

• DSP Core and I/O Voltages

• Post-Regulation Applications

• Applications with Special Start-Up Time or

Sequencing Requirements

• Hot-Swap and Inrush Controls

Figure 1. Typical Application Circuit (Adjustable)

Figure 2. Turn-On Response

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.

2All 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 (24 pages)

PAGE 1
TPS74701 www.ti.com SBVS099F – NOVEMBER 2007 – REVISED NOVEMBER 2010 500mA Low-Dropout Linear Regulator with Programmable Soft-Start Check for Samples: TPS74701 FEATURES 1 • • • • • 2 • • • • • VOUT Range: 0.8V to 3.6V Ultralow VIN Range: 0.8V to 5.5V VBIAS Range 2.7V to 5.
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TPS74701 SBVS099F – NOVEMBER 2007 – REVISED NOVEMBER 2010 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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TPS74701 www.ti.com SBVS099F – NOVEMBER 2007 – REVISED NOVEMBER 2010 THERMAL INFORMATION TPS74701 THERMAL METRIC (1) (2) DRC (3) UNITS (10 PINS) Junction-to-ambient thermal resistance (4) qJA (5) 41.5 qJCtop Junction-to-case (top) thermal resistance qJB Junction-to-board thermal resistance (6) N/A yJT Junction-to-top characterization parameter (7) 0.7 yJB Junction-to-board characterization parameter (8) 11.3 qJCbot Junction-to-case (bottom) thermal resistance (9) 6.
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TPS74701 SBVS099F – NOVEMBER 2007 – REVISED NOVEMBER 2010 www.ti.com ELECTRICAL CHARACTERISTICS At VEN = 1.1V, VIN = VOUT + 0.3V, CBIAS = 0.1mF, CIN = COUT = 10mF, CNR = 1nF, IOUT = 50mA, VBIAS = 5.0V, and TJ = –40°C to +125°C, unless otherwise noted. Typical values are at TJ = +25°C. TPS74701 PARAMETER TEST CONDITIONS VIN Input voltage range VBIAS Bias pin voltage range VREF Internal reference (Adj.) Accuracy (1) VOUT/VIN Line regulation VOUT/IOUT Load regulation VBIAS dropout voltage 2.
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TPS74701 www.ti.com SBVS099F – NOVEMBER 2007 – REVISED NOVEMBER 2010 FUNCTIONAL BLOCK DIAGRAM IN Current Limit BIAS UVLO OUT Thermal Limit 0.44mA VOUT R1 SS CSS Soft-Start Discharge 0.8V Reference FB PG EN Hysteresis and Deglitch R2 0.9 ´ VREF GND Table 1. Standard 1% Resistor Values for Programming the Output Voltage (1) (1) R1 (kΩ) R2 (kΩ) VOUT (V) Short Open 0.8 0.619 4.99 0.9 1.13 4.53 1.0 1.37 4.42 1.05 1.87 4.99 1.1 2.49 4.99 1.2 4.12 4.75 1.5 3.57 2.
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TPS74701 SBVS099F – NOVEMBER 2007 – REVISED NOVEMBER 2010 www.ti.com DEVICE INFORMATION DRC PACKAGE 3mm × 3mm SON (TOP VIEW) IN 1 10 OUT 9 OUT IN 2 PG 3 BIAS 4 EN 5 Thermal Pad 8 FB 7 SS 6 GND PIN DESCRIPTIONS TPS74701 6 NAME PIN # IN 1, 2 DESCRIPTION EN 5 SS 7 Soft-Start pin. A capacitor connected on this pin to ground sets the start-up time. If this pin is left unconnected, the regulator output soft-start ramp time is typically 200ms.
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TPS74701 www.ti.com SBVS099F – NOVEMBER 2007 – REVISED NOVEMBER 2010 TYPICAL CHARACTERISTICS At TJ = +25°C, VIN = VOUT(TYP) + 0.3V, VBIAS = 5V, IOUT = 50mA, VEN = VIN, CIN = 1mF, CBIAS = 4.7mF, and COUT = 10mF, unless otherwise noted. VIN LINE REGULATION VBIAS LINE REGULATION 0.20 0.5 0.15 0.4 Change in VOUT (%) Change in VOUT (%) 0.3 0.10 -40°C 0.05 0 +25°C +125°C -0.05 0.2 -40°C 0.1 0 -0.1 +125°C +25°C -0.2 -0.01 -0.3 -0.15 -0.4 -0.20 -0.5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.
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TPS74701 SBVS099F – NOVEMBER 2007 – REVISED NOVEMBER 2010 www.ti.com TYPICAL CHARACTERISTICS (continued) At TJ = +25°C, VIN = VOUT(TYP) + 0.3V, VBIAS = 5V, IOUT = 50mA, VEN = VIN, CIN = 1mF, CBIAS = 4.7mF, and COUT = 10mF, unless otherwise noted. VBIAS DROPOUT VOLTAGE vs IOUT AND TEMPERATURE (TJ) VBIAS PSRR vs FREQUENCY 2200 Power-Supply Rejection Ratio (dB) 90 VDO (VBIAS - VOUT) (mV) 2000 1800 1600 1400 +125°C 1200 1000 +25°C -40°C 800 600 80 IOUT = 0.1A 70 60 50 40 IOUT = 0.5A 30 VIN = 1.
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TPS74701 www.ti.com SBVS099F – NOVEMBER 2007 – REVISED NOVEMBER 2010 TYPICAL CHARACTERISTICS (continued) At TJ = +25°C, VIN = VOUT(TYP) + 0.3V, VBIAS = 5V, IOUT = 50mA, VEN = VIN, CIN = 1mF, CBIAS = 4.7mF, and COUT = 10mF, unless otherwise noted. BIAS PIN CURRENT vs VBIAS AND TEMPERATURE (TJ) SOFT-START CHARGING CURRENT (ISS) vs TEMPERATURE (TJ) 2.0 500 1.8 475 +125°C 1.6 450 425 1.2 ISS (nA) IBIAS (mA) 1.4 +25°C 1.0 0.8 400 375 0.6 -40°C 350 0.4 325 0.2 300 0 2.0 2.5 3.0 3.5 4.
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TPS74701 SBVS099F – NOVEMBER 2007 – REVISED NOVEMBER 2010 www.ti.com TYPICAL CHARACTERISTICS At TJ = +25°C, VIN = VOUT(TYP) + 0.3V, VBIAS = 5V, IOUT = 1A, VEN = VIN = 1.8V, VOUT = 1.5V, CIN = 1mF, CBIAS = 4.7mF, and COUT = 10mF, unless otherwise noted. VBIAS LINE TRANSIENT VIN LINE TRANSIENT CSS = 1nF COUT = 2.2mF (Ceramic) COUT = 2.2mF (Ceramic) 50mV/div 50mV/div CSS = 1nF 3.8V 5.0V 1V/div 1V/div 1V/ms 3.3V 1V/ms 1.8V Time (50ms/div) Time (50ms/div) Figure 19. Figure 20.
PAGE 11
TPS74701 www.ti.com SBVS099F – NOVEMBER 2007 – REVISED NOVEMBER 2010 APPLICATION INFORMATION The TPS74701 belongs to a family of low-dropout regulators that feature soft-start capability. These regulators use a low current bias input to power all internal control circuitry, allowing the NMOS pass transistor to regulate very low input and output voltages. The use of an NMOS-pass FET offers several critical advantages for many applications.
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TPS74701 SBVS099F – NOVEMBER 2007 – REVISED NOVEMBER 2010 www.ti.com DROPOUT VOLTAGE The TPS74701 offers very low dropout performance, making it well-suited for high-current, low VIN/low VOUT applications. The low dropout of the TPS74701 allows the device to be used in place of a dc/dc converter and still achieve good efficiency. This feature provides designers with the power architecture for their applications to achieve the smallest, simplest, and lowest cost solution.
PAGE 13
TPS74701 www.ti.com SBVS099F – NOVEMBER 2007 – REVISED NOVEMBER 2010 Soft-start capacitors larger than 0.015mF could be a problem in applications where it is necessary to rapidly pulse the enable pin and still require the device to soft-start from ground. CSS must be low-leakage; X7R, X5R, or C0G dielectric materials are preferred. Refer to Table 2 for suggested soft-start capacitor values. SEQUENCING REQUIREMENTS VIN, VBIAS, and VEN can be sequenced in any order without causing damage to the device.
PAGE 14
TPS74701 SBVS099F – NOVEMBER 2007 – REVISED NOVEMBER 2010 device is disabled. The recommended operating condition of the PG pin sink current is up to 1mA, so the pull-up resistor for PG should be in the range of 10kΩ to 1MΩ. If output voltage monitoring is not needed, the PG pin can be left floating. INTERNAL CURRENT LIMIT The TPS74701 features a factory-trimmed, accurate current limit that is flat over temperature and supply voltage.
PAGE 15
TPS74701 www.ti.com SBVS099F – NOVEMBER 2007 – REVISED NOVEMBER 2010 Where PD is the power dissipation shown by Equation 5, TT is the temperature at the center-top of the IC package, and TB is the PCB temperature measured 1mm away from the IC package on the PCB surface (as Figure 30 shows). 140 120 qJA (°C/W) 100 80 NOTE: Both TT and TB can be measured on actual application boards using a thermo-gun (an infrared thermometer).
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TPS74701 SBVS099F – NOVEMBER 2007 – REVISED NOVEMBER 2010 www.ti.com REVISION HISTORY NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision E (August, 2010) to Revision F • Page Corrected equation for Table 2 .............................................................................................................................................
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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 3-Jun-2013 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 TPS74701DRCR SON DRC 10 3000 330.0 12.4 3.3 3.3 1.1 8.0 12.0 Q2 TPS74701DRCT SON DRC 10 250 180.0 12.4 3.3 3.3 1.1 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 3-Jun-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS74701DRCR SON DRC 10 3000 367.0 367.0 35.0 TPS74701DRCT SON DRC 10 250 210.0 185.0 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.