Datasheet

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

SENSE/FB

GND

OUT

TPS79801-Q1, TPS79850-Q1

www.ti.com

SLVS822D –MARCH 2009– REVISED AUGUST 2011

50 mA, 3 V TO 50 V, MICROPOWER, LOW-DROPOUT LINEAR REGULATOR

Check for Samples: TPS79801-Q1, TPS79850-Q1

FEATURES

APPLICATIONS

• Qualified for Automotive Applications

• Low-Current, High-Voltage Regulators

• Wide Input Voltage Range: 3 V to 50 V • Regulators for Battery-Powered Systems

• Low Quiescent Current: 40 μA (Typ) • Telecom

• Low Dropout Voltage: 300 mV (Typ) • Automotive

• Output Current: 50 mA

DGN PACKAGE

• No Input Protection Diodes Needed

MSOP-8 PowerPAD™

• Adjustable Output From 1.275 V to 28 V

(TOP VIEW)

• 1-μA Quiescent Current in Shutdown

• Stable With 1-μF Output Capacitor

• Stable With Aluminum, Tantalum, or Ceramic

Capacitors

Note: The exposed thermal pad is connected to

• Reverse Input-Battery Protection

ground via pin 4 (GND).

• Reverse Output Current Flow Protection

• Thermal Limiting

• Available in MSOP-8 Package

DESCRIPTION

The TPS798xx is the first device in a line of 50-V high-voltage micropower low-dropout (LDO) linear regulators.

This device is capable of supplying 50-mA output current with a dropout voltage of only 300 mV. Designed for

low quiescent current high voltage (50 V) applications, 40 μA operating and 1 μA in shutdown makes the

TPS798xx an ideal choice for battery-powered or high-voltage systems. Quiescent current is also well-controlled

in dropout.

Other features of the TPS798xx include the ability to operate with low equivalent series resistance (ESR) ceramic

output capacitors. This device is stable with only 1 μF on the output; most older devices require between 10-μF

and 100-μF tantalum capacitors for stability. Small ceramic capacitors can be used without the necessary

addition of ESR, as is common with other regulators. Internal protection circuitry includes reverse input-battery

protection, reverse output current protection, current limiting, and thermal limiting to protect the device in various

fault conditions.

This device is available in a fixed output voltage of 5 V (TPS79850) and with an adjustable output voltage with a

1.275-V reference voltage (TPS79801). The TPS798xx regulator is available in a 8-lead MSOP (DGN) package

with an exposed pad for enhanced thermal management capability.

ORDERING INFORMATION

(1)

ORDERABLE PART

OUT

(NOM) PACKAGE

(2)

TOP-SIDE MARKING

NUMBER

Adjustable

(3)

TPS79801QDGNRQ1 PMRQ

–40°C to 125°C MSOP – DGN Reel of 2500

5 V TPS79850QDGNRQ1 OOLQ

(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

web site at www.ti.com.

(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.

(3) For fixed 1.275 V, tie FB to out.

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 (21 pages)

PAGE 1
TPS79801-Q1, TPS79850-Q1 SLVS822D – MARCH 2009 – REVISED AUGUST 2011 www.ti.com 50 mA, 3 V TO 50 V, MICROPOWER, LOW-DROPOUT LINEAR REGULATOR Check for Samples: TPS79801-Q1, TPS79850-Q1 FEATURES APPLICATIONS • • • • • • • • • • • • • • 1 23 • • • • Qualified for Automotive Applications Wide Input Voltage Range: 3 V to 50 V Low Quiescent Current: 40 μA (Typ) Low Dropout Voltage: 300 mV (Typ) Output Current: 50 mA No Input Protection Diodes Needed Adjustable Output From 1.
PAGE 2
TPS79801-Q1, TPS79850-Q1 SLVS822D – MARCH 2009 – REVISED AUGUST 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.
PAGE 3
TPS79801-Q1, TPS79850-Q1 SLVS822D – MARCH 2009 – REVISED AUGUST 2011 www.ti.com ELECTRICAL CHARACTERISTICS VIN = VOUT(NOM) + 1.0 V or 4.0 V (whichever is greater for either fixed or adjustable versions), ILOAD = 1.0 mA, VEN = 3.0 V, COUT = CIN = 2.2 μF (unless otherwise noted). For TPS79801, FB pin tied to VOUT. Typical values are at TJ = 25°C. PARAMETER VIN Fixed VOUT Adjustable VOUT ΔVOUT/ΔVIN TEST CONDITIONS Minimum input voltage ILOAD = 50 mA Initial output voltage accuracy VIN = VOUT nom + 0.
PAGE 4
TPS79801-Q1, TPS79850-Q1 SLVS822D – MARCH 2009 – REVISED AUGUST 2011 www.ti.com ELECTRICAL CHARACTERISTICS (continued) VIN = VOUT(NOM) + 1.0 V or 4.0 V (whichever is greater for either fixed or adjustable versions), ILOAD = 1.0 mA, VEN = 3.0 V, COUT = CIN = 2.2 μF (unless otherwise noted). For TPS79801, FB pin tied to VOUT. Typical values are at TJ = 25°C.
PAGE 5
TPS79801-Q1, TPS79850-Q1 SLVS822D – MARCH 2009 – REVISED AUGUST 2011 www.ti.com 120 DC O pe ra t io n IOUT = 5 m A 100 TA – Temperature – °C T ra ns ie nt ( <5 0 0 m s ) 80 60 IOUT = 30 m A 40 V OUT = 5 V TJ(max) = 125°C 0JA = 50°C/W 20 IOUT = 50 m A 0 10 20 30 40 V IN – Input Voltage – V 50 60 Figure 1. Safe Operating Area FUNCTIONAL BLOCK DIAGRAMS OUT IN Current Limit Thermal Shutdown SENSE Internal Supply EN Bandgap GND Figure 2.
PAGE 6
TPS79801-Q1, TPS79850-Q1 SLVS822D – MARCH 2009 – REVISED AUGUST 2011 www.ti.com OUT IN Current Limit Thermal Shutdown Internal Supply EN FB Bandgap GND Figure 3.
PAGE 7
TPS79801-Q1, TPS79850-Q1 SLVS822D – MARCH 2009 – REVISED AUGUST 2011 www.ti.com PIN CONFIGURATIONS DGN PACKAGE MSOP-8 PowerPAD (TOP VIEW) OUT SENSE/FB NC GND Note: 1 2 3 4 8 7 6 5 IN NC NC EN The exposed thermal pad is connected to ground via pin 4 (GND). PIN DESCRIPTIONS PIN NAME DGN DESCRIPTION EN 5 Enable pin. Driving the EN pin high turns on the regulator over full operating range. Driving this pin low puts the regulator into shutdown mode over full operating range. IN 8 Input pin. A 0.
PAGE 8
TPS79801-Q1, TPS79850-Q1 SLVS822D – MARCH 2009 – REVISED AUGUST 2011 www.ti.com TYPICAL CHARACTERISTICS LINE REGULATION vs INPUT VOLTAGE LINE REGULATION vs INPUT VOLTAGE 2 2.5 TA = -40°C Line Regulation – mV Line Regulation – mV 1.5 TA = 85°C 2 TA = 25°C 1.5 TA = -40°C 1 TPS79801 V EN = 2 V V OUT(nom) = 1.275 V IOUT = 1 m A 0.5 0 TA = 25°C TPS79850 V EN = V IN IOUT = 1 m A -1 10 20 30 V IN – Input Voltage – V 0 50 10 20 30 V IN – Input Voltage – V Figure 4. Figure 5.
PAGE 9
TPS79801-Q1, TPS79850-Q1 SLVS822D – MARCH 2009 – REVISED AUGUST 2011 www.ti.com TYPICAL CHARACTERISTICS (continued) QUIESCENT CURRENT vs TEMPERATURE QUIESCENT CURRENT vs TEMPERATURE 50 50 45 45 V EN = V IN 40 40 IQ – Quiescent Current – µA IQ – Quiescent Current – µA V EN = V IN 35 35 30 30 TPS79801 V IN = 6 V V OUT(nom) = 1.
PAGE 10
TPS79801-Q1, TPS79850-Q1 SLVS822D – MARCH 2009 – REVISED AUGUST 2011 www.ti.com TYPICAL CHARACTERISTICS (continued) QUIESCENT CURRENT vs OUTPUT CURRENT QUIESCENT CURRENT vs OUTPUT CURRENT 1800 1800 TPS79801 V IN = 7 V V EN = V IN V OUT(nom) = 5 V TA = 25°C IQ – Quiescent Current – µA 1400 TPS79850 V IN = 6 V V EN = V IN TA = 25°C 1600 IQ – Quiescent Current – µA 1600 1200 1000 800 600 1400 1200 1000 800 600 400 400 200 200 0 0 0 0 0.01 0.02 0.03 0.04 0.01 0.05 0.02 0.03 0.04 0.
PAGE 11
TPS79801-Q1, TPS79850-Q1 SLVS822D – MARCH 2009 – REVISED AUGUST 2011 www.ti.com APPLICATION INFORMATION The TPS798xx is a 50-mA high-voltage LDO regulator with micropower quiescent current and shutdown. The device is capable of supplying 50 mA at a dropout voltage of 300 mV (typ). The low operating quiescent current (40 μA) drops to 1 μA in shutdown. In addition to the low quiescent current, the TPS798xx incorporates several protection features that make it ideal for battery-powered applications.
PAGE 12
TPS79801-Q1, TPS79850-Q1 SLVS822D – MARCH 2009 – REVISED AUGUST 2011 www.ti.com A 100-pF capacitor (C1) placed in parallel with the top resistor (R2) of the output divider is necessary for stability and transient performance of the adjustable TPS798xx. The impedance of C1 at 10 kHz should be less than the value of R2. The adjustable device is tested and specified with the FB pin tied to the OUT pin and a 1 mA dc load (unless otherwise specified) for an output voltage of 1.275 V.
PAGE 13
TPS79801-Q1, TPS79850-Q1 www.ti.com SLVS822D – MARCH 2009 – REVISED AUGUST 2011 Calculating Junction Temperature Given an output voltage of 5 V, an input voltage range of 15 V to 24 V, an output current range of 0 mA to 50 mA, and a maximum ambient temperature of 50°C, the maximum junction temperature is calculated as follows.
PAGE 14
TPS79801-Q1, TPS79850-Q1 SLVS822D – MARCH 2009 – REVISED AUGUST 2011 www.ti.com Thermal Information The amount of heat that an LDO linear regulator generates is directly proportional to the amount of power it dissipates during operation. All integrated circuits have a maximum allowable junction temperature (TJ max) above which normal operation is not assured.
PAGE 15
PACKAGE OPTION ADDENDUM www.ti.
PAGE 16
PACKAGE MATERIALS INFORMATION www.ti.com 16-Jul-2011 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 TPS79801QDGNRQ1 MSOPPower PAD DGN 8 2500 330.0 12.4 5.3 3.3 1.3 8.0 12.0 Q1 TPS79850QDGNRQ1 MSOPPower PAD DGN 8 2500 330.0 12.4 5.3 3.3 1.3 8.0 12.
PAGE 17
PACKAGE MATERIALS INFORMATION www.ti.com 16-Jul-2011 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS79801QDGNRQ1 MSOP-PowerPAD DGN 8 2500 370.0 355.0 55.0 TPS79850QDGNRQ1 MSOP-PowerPAD DGN 8 2500 370.0 355.0 55.
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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.