TL1963A-Q1 [TI]

具有反向电流保护功能的汽车类 1.5A、20V、可调节低压降稳压器;


型号：	TL1963A-Q1
厂家：	TEXAS INSTRUMENTS
描述：	具有反向电流保护功能的汽车类 1.5A、20V、可调节低压降稳压器稳压器
文件：	总29页 (文件大小：1631K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Sample &

Buy

Support &

Community

Product

Folder

Tools &

Software

Technical

Documents

TL1963A-Q1

SLVSA79A –APRIL 2010–REVISED SEPTEMBER 2016

TL1963A-Q1 1.5-A Low-Noise Fast-Transient-Response Low-Dropout Regulator

1 Features

3 Description

The TL1963A-Q1 device is a low-dropout (LDO)

regulator optimized for fast transient response. The

device can supply 1.5 A of output current with a

dropout voltage of 340 mV. Operating quiescent

current is 1 mA, dropping to less than 1 µA in

shutdown. Quiescent current is well controlled; it does

not rise in dropout as it does with many other

regulators. In addition to fast transient response, the

TL1963A-Q1 regulators have very low output noise,

which makes them ideal for sensitive RF supply

applications.

•

Qualified for Automotive Applications

•

AEC-Q100 Test Guidance With the Following:

–

Device Temperature Grade 1: –40°C to 125°C

Ambient Operating Temperature

–

Device HBM ESD Classification Level 2

Device CDM ESD Classification Level C6

•

Optimized for Fast Transient Response

Output Current: 1.5 A

Dropout Voltage: 340 mV

Output voltage range is from 1.21 V to 20 V. The

TL1963A-Q1 regulators are stable with output

capacitors as low as 10 µF. Small ceramic capacitors

can be used without the necessary addition of ESR,

as is common with other regulators. Internal

Low Noise: 40 µV_RMS(10 Hz to 100 kHz)

1-mA Quiescent Current

No Protection Diodes Required

Controlled Quiescent Current in Dropout

protection

circuitry

includes

reverse-battery

Fixed Output Voltages: 1.5 V, 1.8 V, 2.5 V,

and 3.3 V

protection, current limiting, thermal limiting, and

reverse-current protection. The devices are available

in fixed output voltages of 1.5 V, 1.8 V, 2.5 V, and

3.3 V, and as an adjustable device with a 1.21-V

reference voltage. The TL1963A-Q1 regulators are

available in the 5-pin TO-263 (KTT) package.

•

Adjustable Output Voltage: 1.21 V to 20 V

Less Than 1-µA Quiescent Current in Shutdown

Stable With 10-µF Output Capacitor

Stable With Ceramic Capacitors

Reverse-Battery Protection

Device Information⁽¹⁾

PART NUMBER

PACKAGE

BODY SIZE (NOM)

No Reverse Current

TL1963A-Q1

TO-263 (5)

10.16 mm × 8.42 mm

Thermal Limiting

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

2 Applications

•

3.3-V to 2.5-V Logic Power Supplies

Post Regulator for Switching Supplies

Simplified Schematic

OUT

2.5 V at 1 A

10 µF

V_IN= 5 V

4.22 kΩ

TL1963A-Q1

SHDN

GND

ADJ

4.0 kΩ

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

TL1963A-Q1

SLVSA79A –APRIL 2010–REVISED SEPTEMBER 2016

www.ti.com

Table of Contents

7.4 Device Functional Modes........................................ 14

Application and Implementation ........................ 15

8.1 Application Information............................................ 15

8.2 Typical Application .................................................. 15

Power Supply Recommendations...................... 20

Features.................................................................. 1

Applications ........................................................... 1

Description ............................................................. 1

Revision History..................................................... 2

Pin Configuration and Functions......................... 3

Specifications......................................................... 4

6.1 Absolute Maximum Ratings ...................................... 4

6.2 ESD Ratings.............................................................. 4

6.3 Recommended Operating Conditions....................... 4

6.4 Thermal Information.................................................. 4

6.5 Electrical Characteristics........................................... 5

6.6 Typical Characteristics.............................................. 7

Detailed Description ............................................ 12

7.1 Overview ................................................................. 12

7.2 Functional Block Diagram ....................................... 12

7.3 Feature Description................................................. 12

10 Layout................................................................... 20

10.1 Layout Guidelines ................................................. 20

10.2 Layout Example .................................................... 21

10.3 Calculating Junction Temperature ........................ 21

11 Device and Documentation Support ................. 22

11.1 Receiving Notification of Documentation Updates 22

11.2 Community Resources.......................................... 22

11.3 Trademarks........................................................... 22

11.4 Electrostatic Discharge Caution............................ 22

11.5 Glossary................................................................ 22

12 Mechanical, Packaging, and Orderable

Information ........................................................... 22

4 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from Original (April 2010) to Revision A

Page

•

Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation

section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and

Mechanical, Packaging, and Orderable Information section .................................................................................................. 1

Deleted Ordering Information table, see POA at the end of the data sheet........................................................................... 1

Added AEC-Q100 Test Guidance bullets to Features............................................................................................................ 1

Changed R_θJAfrom 26.5°C/W : to 22.8°C/W ......................................................................................................................... 4

Changed R_θJC(top)from 24.1°C/W : to 36.5°C/W .................................................................................................................... 4

Changed R_θJC(bot)from 0.38°C/W : to 1.1°C/W ...................................................................................................................... 4

Changed x-axis on Line Transient Response graph from TBD µs/div to 500 µs/div ........................................................... 11

•

Submit Documentation Feedback

Product Folder Links: TL1963A-Q1

TL1963A-Q1

www.ti.com

SLVSA79A –APRIL 2010–REVISED SEPTEMBER 2016

5 Pin Configuration and Functions

KTT Package

5-Pin TO-263

Top View

Not to scale

Thermal

Pad

Pin Functions

NAME

I/O

DESCRIPTION

NO.

Shutdown – The SHDN pin is used to put the TL1963A-Q1 regulators into a low-power shutdown state.

The output is off when the SHDN pin is pulled low. The SHDN pin can be driven either by 5-V logic or

open-collector logic with a pullup resistor. The pullup resistor is required to supply the pullup current of

the open-collector gate, normally several microamperes, and the SHDN pin current, typically 3 µA. If

unused, the SHDN pin must be connected to V_IN. The device is in the low-power shutdown state if the

SHDN pin is not connected.

SHDN

Input – Power is supplied to the device through the IN pin. A bypass capacitor is required on this pin if

the device is more than six inches away from the main input filter capacitor. In general, the output

impedance of a battery rises with frequency, so it is advisable to include a bypass capacitor in battery-

powered circuits. A bypass capacitor (ceramic) in the range of 1 µF to 10 µF is sufficient. The TL1963A-

Q1 regulators are designed to withstand reverse voltages on the IN pin with respect to ground and the

OUT pin. In the case of a reverse input, which can happen if a battery is plugged in backwards, the

device acts as if there is a diode in series with its input. There is no reverse current flow into the

regulator, and no reverse voltage appears at the load. The device protects both itself and the load.

GND

OUT

—

Ground

Output – The output supplies power to the load. A minimum output capacitor (ceramic) of 10 µF is

required to prevent oscillations. Larger output capacitors are required for applications with large

transient loads to limit peak voltage transients.

Adjust – For the adjustable TL1963A-Q1, this is the input to the error amplifier. This pin is clamped

internally to ±7 V. It has a bias current of 3 µA that flows into the pin. The ADJ pin voltage is 1.21 V

referenced to ground, and the output voltage range is 1.21 V to 20 V.

Sense – For fixed voltage versions of the TL1963A-Q1 (TL1963A-Q1-1.5, TL1963A-Q1-1.8, TL1963A-

Q1-2.5, and TL1963A-Q1-3.3), the SENSE pin is the input to the error amplifier. Optimum regulation is

obtained at the point where the SENSE pin is connected to the OUT pin of the regulator. In critical

applications, small voltage drops are caused by the resistance (R_P) of printed-circuit traces between the

regulator and the load. These may be eliminated by connecting the SENSE pin to the output at the load.

Note that the voltage drop across the external printed-circuit traces adds to the dropout voltage of the

regulator. The SENSE pin bias current is 600 µA at the rated output voltage. The SENSE pin can be

pulled below ground (as in a dual supply system in which the regulator load is returned to a negative

supply) and still allow the device to start and operate.

–

ADJ/SENSE

Thermal Pad

For the KTT package, the exposed thermal pad is connected to ground and must be soldered to the

PCB for rated thermal performance.

—

Submit Documentation Feedback

Product Folder Links: TL1963A-Q1

TL1963A-Q1

SLVSA79A –APRIL 2010–REVISED SEPTEMBER 2016

www.ti.com

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)⁽¹⁾

MIN

–20

–7

MAX

UNIT

OUT

Input-to-output differential⁽²⁾

Input voltage, V_IN

SENSE

ADJ

SHDN

–20

Output short-circuit duration, t_short

Operating junction temperature, T_J

Storage temperature, T_stg

Indefinite

–40

–65

125

150

°C

(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings

only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended

Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

(2) Absolute maximum input-to-output differential voltage cannot be achieved with all combinations of rated IN pin and OUT pin voltages.

With the IN pin at 20 V, the OUT pin may not be pulled below 0 V. The total measured voltage from IN to OUT cannot exceed ±20 V.

6.2 ESD Ratings

VALUE

±2000

±1000

UNIT

Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001⁽¹⁾

Charged-device model (CDM), per JEDEC specification JESD22-C101⁽²⁾

V_(ESD)

Electrostatic discharge

(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.

(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

MIN

V_OUT+ V_DO

MAX

UNIT

V_IN

V_IH

V_IL

T_J

Input voltage

SHDN high-level input voltage

SHDN low-level input voltage

Operating junction temperature

0.25

125

–40

°C

6.4 Thermal Information

TL1963A-Q1

THERMAL METRIC⁽¹⁾

KTT (TO-263)

UNIT

5 PINS

22.8

36.5

6.8

R_θJA

Junction-to-ambient thermal resistance

°C/W

R_θJC(top)

R_θJB

Junction-to-case (top) thermal resistance

Junction-to-board thermal resistance

ψ_JT

Junction-to-top characterization parameter

Junction-to-board characterization parameter

Junction-to-case (bottom) thermal resistance

3.2

ψ_JB

6.8

R_θJC(bot)

1.1

(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application

report.

Submit Documentation Feedback

Product Folder Links: TL1963A-Q1

TL1963A-Q1

www.ti.com

SLVSA79A –APRIL 2010–REVISED SEPTEMBER 2016

6.5 Electrical Characteristics

Over operating temperature range T_J= –40°C to 125°C (unless otherwise noted)⁽¹⁾

PARAMETER

TEST CONDITIONS

I_LOAD= 0.5 A, T_J= 25°C

I_LOAD= 1.5 A, T_J= –40°C to 125°C

V_IN= 2.21 V, I_LOAD= 1 mA, T_J= 25°C

MIN TYP⁽²⁾

MAX UNIT

1.9

2.1

V_IN

Minimum input voltage⁽³⁾⁽⁴⁾

2.5

1.477

1.5 1.523

V_IN= 2.5 V to 20 V,

I_LOAD= 1 mA to 1.5 A,

T_J= –40°C to 125°C

TL1963A-Q1-1.5

TL1963A-Q1-1.8

TL1963A-Q1-2.5

TL1963A-Q1-3.3

TL1963A-Q1

1.447

1.773

1.737

2.462

2.412

3.25

1.5 1.545

1.8 1.827

1.8 1.854

2.5 2.538

2.5 2.575

V_IN= 2.3 V, I_LOAD= 1 mA, T_J= 25°C

V_IN= 2.8 V to 20 V,

I_LOAD= 1 mA to 1.5 A,

T_J= –40°C to 125°C

V_OUT

Regulated output voltage⁽⁵⁾

V_IN= 3 V, I_LOAD= 1 mA, T_J= 25°C

V_IN= 3.5 V to 20 V,

I_LOAD= 1 mA to 1.5 A,

T_J= –40°C to 125°C

V_IN= 3.8 V, I_LOAD= 1 mA, T_J= 25°C

3.3

3.35

3.4

V_IN= 4.3 V to 20 V,

I_LOAD= 1 mA to 1.5 A,

T_J= –40°C to 125°C

3.2

V_IN= 2.21 V, I_LOAD= 1 mA, T_J= 25°C

1.192

1.174

1.21 1.228

1.21 1.246

V_ADJ

ADJ pin voltage⁽³⁾⁽⁵⁾

V_IN= 2.5 V to 20 V,

I_LOAD= 1 mA to 1.5 A,

T_J= –40°C to 125°C

TL1963A-Q1-1.5, ΔV_IN= 2.21 V to 20 V,

I_LOAD= 1 mA, T_J= –40°C to 125°C

2.5

TL1963A-Q1-1.8, ΔV_IN= 2.3 V to 20 V,

I_LOAD= 1 mA, T_J= –40°C to 125°C

TL1963A-Q1-2.5, ΔV_IN= 3 V to 20 V,

I_LOAD= 1 mA, T_J= –40°C to 125°C

Line regulation

TL1963A-Q1-3.3, ΔV_IN= 3.8 V to 20 V,

I_LOAD= 1 mA, T_J= –40°C to 125°C

TL1963A-Q1⁽³⁾, ΔV_IN= 2.21 V to 20 V,

I_LOAD= 1 mA, T_J= –40°C to 125°C

3.5

1.5

T_J= 25°C

TL1963A-Q1-1.5, V_IN= 2.5 V,

ΔI_LOAD= 1 mA to 1.5 A

T_J= –40°C to 125°C

T_J= 25°C

2.5

TL1963A-Q1-1.8, V_IN= 2.8 V,

ΔI_LOAD= 1 mA to 1.5 A

T_J= –40°C to 125°C

T_J= 25°C

TL1963A-Q1-2.5, V_IN= 3.5 V,

Load regulation

ΔI_LOAD= 1 mA to 1.5 A

T_J= –40°C to 125°C

T_J= 25°C

TL1963A-Q1-3.3, V_IN= 4.3 V,

ΔI_LOAD= 1 mA to 1.5 A

T_J= –40°C to 125°C

T_J= 25°C

TL1963A-Q1⁽³⁾, V_IN= 2.5 V,

ΔI_LOAD= 1 mA to 1.5 A

T_J= –40°C to 125°C

(1) The TL1963A-Q1 regulators are tested and specified under pulse load conditions such that T_J≈ T_A. The TL1963A-Q1 is fully tested at

T_A= 25°C. Performance at –40°C and 125°C is specified by design, characterization, and correlation with statistical process controls.

(2) Typical values represent the likely parametric nominal values determined at the time of characterization. Typical values depend on the

application and configuration and may vary over time. Typical values are not ensured on production material.

(3) The TL1963A-Q1 (adjustable version) is tested and specified for these conditions with the ADJ pin connected to the OUT pin.

(4) For the TL1963A-Q1, TL1963A-Q1-1.5 and TL1963A-Q1-1.8, dropout voltages are limited by the minimum input voltage specification

under some output voltage and load conditions.

(5) Operating conditions are limited by maximum junction temperature. The regulated output voltage specification does not apply for all

possible combinations of input voltage and output current. When operating at maximum input voltage, the output current range must be

limited. When operating at maximum output current, the input voltage range must be limited.

Submit Documentation Feedback

Product Folder Links: TL1963A-Q1

TL1963A-Q1

SLVSA79A –APRIL 2010–REVISED SEPTEMBER 2016

www.ti.com

Electrical Characteristics (continued)

Over operating temperature range T_J= –40°C to 125°C (unless otherwise noted)⁽¹⁾

PARAMETER

TEST CONDITIONS

MIN TYP⁽²⁾

MAX UNIT

T_J= 25°C

0.02

0.06

0.1

I_LOAD= 1 mA

I_LOAD= 100 mA

I_LOAD= 500 mA

I_LOAD= 1.5 A

T_J= –40°C to 125°C

T_J= 25°C

0.1

0.19

0.34

0.17

Dropout voltage^(4)(6)(7)

V_IN= V_OUT(NOMINAL)

T_J= –40°C to 125°C

T_J= 25°C

0.22

V_DROPOUT

0.27

T_J= –40°C to 125°C

T_J= 25°C

0.35

0.45

0.55

1.5

T_J= –40°C to 125°C

I_LOAD= 0 mA, T_J= –40°C to 125°C

I_LOAD= 1 mA, T_J= –40°C to 125°C

I_LOAD= 100 mA, T_J= –40°C to 125°C

I_LOAD= 500 mA, T_J= –40°C to 125°C

I_LOAD= 1.5 A, T_J= –40°C to 125°C

1.1

3.8

1.6

GND pin current⁽⁷⁾⁽⁸⁾

V_IN= V_OUT(NOMINAL)+ 1

I_GND

5.5

120

C_OUT= 10 µF, I_LOAD= 1.5 A, B_W= 10 Hz to 100 kHz,

T_J= 25°C

e_N

Output voltage noise

µV_RMS

µA

I_ADJ

ADJ pin bias current⁽³⁾⁽⁹⁾

T_J= 25°C

V_OUT= OFF to ON, T_J= –40°C to 125°C

V_OUT= ON to OFF, T_J= –40°C to 125°C

V _SHDN= 0 V, T_J= 25°C

0.9

Shutdown threshold

SHDN pin current

0.25

0.75

0.01

I_SHDN

µA

V _SHDN= 20 V, T_J= 25°C

Quiescent current in

shutdown

V_IN= 6 V, V _SHDN= 0 V, T_J= 25°C

0.01

µA

V_IN– V_OUT= 1.5 V (avg), V_RIPPLE= 0.5 V_P-P

f_RIPPLE= 120 Hz, I_LOAD= 0.75 A, T_J= 25°C

Ripple rejection

Current limit

V_IN= 7 V, V_OUT= 0 V, T_J= 25°C

I_LIMIT

I_IL

V_IN= V_OUT(NOMINAL)+ 1, T_J= –40°C to 125°C

1.6

Input reverse leakage

current

V_IN= –20 V, V_OUT= 0 V, T_J= –40°C to 125°C

TL1963A-Q1-1.5, V_OUT= 1.5 V, V_IN< 1.5 V, T_J= 25°C

TL1963A-Q1-1.8, V_OUT= 1.8 V, V_IN< 1.8 V, T_J= 25°C

TL1963A-Q1-2.5, V_OUT= 2.5 V, V_IN< 2.5 V, T_J= 25°C

TL1963A-Q1-3.3, V_OUT= 3.3 V, V_IN< 3.3 V, T_J= 25°C

TL1963A-Q1, V_OUT= 1.21 V, V_IN< 1.21 V, T_J= 25°C

600

300

1200

600

I_RO

Reverse output current⁽¹⁰⁾

µA

(6) Dropout voltage is the minimum input to output voltage differential required to maintain regulation at a specified output current. In

dropout, the output voltage is equal to: V_IN– V_DROPOUT

(7) To satisfy requirements for minimum input voltage, the TL1963A-Q1 (adjustable version) is tested and specified for these conditions with

an external resistor divider (two 4.12-kΩ resistors) for an output voltage of 2.4 V. The external resistor divider adds a 300-mA DC load

on the output.

(8) GND pin current is tested with V_IN= (V_OUT(NOMINAL)+ 1 V) and a current source load. The GND pin current decreases at higher input

voltages.

(9) ADJ pin bias current flows into the ADJ pin.

(10) Reverse output current is tested with the IN pin grounded and the OUT pin forced to the rated output voltage. This current flows into the

OUT pin and out the GND pin.

Submit Documentation Feedback

Product Folder Links: TL1963A-Q1

TL1963A-Q1

www.ti.com

SLVSA79A –APRIL 2010–REVISED SEPTEMBER 2016

6.6 Typical Characteristics

500

450

400

480

360

240

120

I_OUT= 1.5 A

350

T_A= 125°C

300

250

200

I_OUT= 0.5 A

T_A= 25°C

150

100

I_OUT= 100 mA

I_OUT= 1 mA

0.2

0.4

0.6

0.8

1.2

1.4

1.6

-50

-25

100

125

T_A– Free-Air Temperature – °C

Output Current – A

Figure 2. Dropout Voltage vs Temperature

Figure 1. Dropout Voltage vs Output Current

1.5

1.84

V_IN= 6 V

1.4

1.3

1.2

1.1

V_OUTFixed 1.8 V

I_OUT= 1 mA

1.83

1.82

1.81

1.8

I_OUT= 0 A

V_SHDN= V_IN

TL1963A-3.3

V_OUTFixed 3.3 V

0.9

0.8

0.7

0.6

0.5

1.79

1.78

1.77

1.76

TL1963A (Adjustable)

V_OUTAdjustable

-50

-25

100

125

-50

-25

100

125

T_A– Free-Air Temperature – °C

Figure 3. Quiescent Current vs Temperature

Figure 4. Output Voltage vs Temperature

2.58

3.38

3.36

3.34

3.32

3.3

V_OUTFixed 2.5 V

I_OUT= 1 mA

V_OUTFixed 3.3 V

I_OUT= 1 mA

2.56

2.54

2.52

2.5

3.28

3.26

3.24

3.22

2.48

2.46

2.44

2.42

-50

-25

100

125

-50

-25

100

125

T_A– Free-Air Temperature – °C

Figure 5. Output Voltage vs Temperature

Figure 6. Output Voltage vs Temperature

Submit Documentation Feedback

Product Folder Links: TL1963A-Q1

TL1963A-Q1

SLVSA79A –APRIL 2010–REVISED SEPTEMBER 2016

www.ti.com

Typical Characteristics (continued)

1.23

1.2

T_J= 25°C

V_OUTAdjustable

1.225

R_OUT= 4.3 k

V_SHDN= V_IN

I_OUT= 1 mA

V_IN= 6 V

1.22

V_OUTAdjustable

0.8

0.6

0.4

0.2

1.215

1.21

1.205

1.2

1.195

1.19

-50

-25

100

125

10 12 14 16

18 20

T_A– Free-Air Temperature – °C

Input Voltage – V

Figure 7. Output Voltage vs Temperature

Figure 8. Quiescent Current vs Input Voltage

100

T_J= 25°C

V_SHDN= V_IN

V_OUTAdjustable

V_OUT= 1.21 V

V_OUTAdjustable

V_OUT= 1.21 V

I_OUT= 1.5 A

I_OUT= 300 mA

I_OUT= 1 A

I_OUT= 100 mA

I_OUT= 0.5 A

I_OUT= 10 mA

Input Voltage – V

Figure 9. Ground Current vs Input Voltage

Figure 10. Ground Current vs Input Voltage

120

100

T_J= 25°C

V_SHDN= V_IN

V_OUTFixed 3.3 V

I_OUT= 300 mA

I_OUT= 100 mA

I_OUT= 1.5 A

I_OUT= 10 mA

I_OUT= 1 A

I_OUT= 0.5 A

Input Voltage – V

Figure 11. Ground Current vs Input Voltage

Figure 12. Ground Current vs Input Voltage

Submit Documentation Feedback

Product Folder Links: TL1963A-Q1

TL1963A-Q1

www.ti.com

SLVSA79A –APRIL 2010–REVISED SEPTEMBER 2016

Typical Characteristics (continued)

0.75

0.5

V_IN= V_OUT(nom) + 1

0.25

-50

-25

100

125

Free-Air Temperature (èC)

D011

0.2

0.4

0.6

0.8

1.2

1.4

1.6

Output Current – A

Figure 13. Ground Current vs Output Current

Figure 14. SHDN Input Current vs Temperature

2.5

2.25

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

1.75

1.5

1.25

0.75

0.5

0.25

-50

-25

100

125

SHDN Input Voltage (V)

Free-Air Temperature (èC)

D012

D013

Figure 15. SHDN Input Current

vs SHDN Input Voltage

Figure 16. SHDN Threshold (OFF to ON)

vs Temperature

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

4.5

3.5

2.5

1.5

0.5

-50

-25

100

125

-50

-25

100

125

Free-Air Temperature (èC)

D014

D015

Figure 17. SHDN Threshold (ON to OFF)

vs Temperature

Figure 18. ADJ Bias Current vs Temperature

Submit Documentation Feedback

Product Folder Links: TL1963A-Q1

TL1963A-Q1

SLVSA79A –APRIL 2010–REVISED SEPTEMBER 2016

www.ti.com

Typical Characteristics (continued)

3.5

T_A= -40èC

T_A= 25èC

T_A= 125èC

2.5

1.5

0.5

-50

-25

100

125

Input/Output Differential Voltage (V)

Free-Air Temperature (èC)

D016

D017

Figure 19. Current Limit

Figure 20. Current Limit vs Temperature

vs Input/Output Differential Voltage

1000

800

600

400

200

T_J= 25°C

V_IN= 0 V

Current flows into OUT pin

Adjustable

TL1963^OA^UT(Adjustable)

V_OUT= V_ADJ

V_{OTULT 1}F₉ix₆e₃d_A-3₃._.3₃V

V_OUT= 3.3 V

V_OUTAdjustable

TL1963A (Adjustable)

V_OUT= 1.21 V

V_OT_UL_T1F9ix6e3dA-33..33V

V_OUT= V_FB

-2

-50

-25

100

125

Output Voltage – V

T_A– Free-Air Temperature – °C

Figure 21. Reverse Output Current

vs Output Voltage

Figure 22. Reverse Output Current vs Temperature

I_OUT= 1.5 A

TL1963A (Adjustable)

V_OUTAdjustable

-5

-10

TL1963A-1.8

V_OUTFixed 1.8 V

-15

-20

-25

-30

-35

TL1963A-2.5

V_OUTFixed 2.5 V

TL1963A-3.3

V_OUTFixed 3.3 V

100

10k

100k

Frequency (Hz)

D010

-50

-25

100

125

T_A– Free-Air Temperature – °C

Figure 24. Load Regulation vs Temperature

Figure 23. Ripple Rejection vs Frequency

Submit Documentation Feedback

Product Folder Links: TL1963A-Q1

TL1963A-Q1

www.ti.com

SLVSA79A –APRIL 2010–REVISED SEPTEMBER 2016

Typical Characteristics (continued)

C_OUTC= 10=µF10(cµeFramic)

OUT

I_OUT= 1.5 A

20 mV

0 mV

V_OUT

TL1963A-3.3

V_OUTFixed 3.3 V

-20 mV

1.5 A

0.1

I_OUT

TL1963A (Adjustable)

V_OUTAdjustable

10 mA

500 μs/div

0.01

100k

100

Frequency - Hz

10k

Figure 25. Output Noise Voltage vs Frequency

Figure 26. Load Transient Response

V_IN

5.3 V

20 mV

0 mV

V_OUT

4.3 V

-20 mV

1.5 A

5 mV

V_OUT

I_OUT

10 mA

-5 mV

500 μs/div

Figure 27. Load Transient Response

Figure 28. Line Transient Response

Submit Documentation Feedback

Product Folder Links: TL1963A-Q1

TL1963A-Q1

SLVSA79A –APRIL 2010–REVISED SEPTEMBER 2016

www.ti.com

7 Detailed Description

7.1 Overview

The TL1963A-Q1 series are 1.5-A LDO regulators optimized for fast transient response. The devices are capable

of supplying 1.5 A at a dropout voltage of 340 mV. The low operating quiescent current (1 mA) drops to less than

1 µA in shutdown. In addition to the low quiescent current, the TL1963A-Q1 regulators incorporate several

protection features which make them ideal for use in battery-powered systems. The devices are protected

against both reverse input and reverse output voltages. In battery-backup applications where the output can be

held up by a backup battery when the input is pulled to ground, the TL1963A-Q1 acts as if it has a diode in

series with its output and prevents reverse current flow. Additionally, in dual-supply applications where the

regulator load is returned to a negative supply, the output can be pulled below ground by as much as 20 V and

still allow the device to start and operate.

7.2 Functional Block Diagram

Reverse

Current

Protection

Pass

Element

Current

Limit

OUT

SHDN

Error Amplifier

Thermal

Overload

SENSE/ADJ

Voltage Reference

Reverse

Voltage

Protection

GND

7.3 Feature Description

7.3.1 Adjustable Operation

The adjustable version of the TL1963A-Q1 has an output voltage range of 1.21 V to 20 V. The output voltage is

set by the ratio of two external resistors as shown in Figure 29. The device maintains the voltage at the ADJ pin

at 1.21 V referenced to ground. The current in R1 is then equal to 1.21 V / R1, and the current in R2 is the

current in R1 plus the ADJ pin bias current. The ADJ pin bias current, 3 µA at 25°C, flows through R2 into the

ADJ pin. The output voltage can be calculated using the formula shown in Figure 29. The value of R1 must be

less than 4.17 kΩ to minimize errors in the output voltage caused by the ADJ pin bias current. Note that in

shutdown the output is turned off, and the divider current is zero.

OUT

TL1963A-Q1

ADJ

OUT

GND

≈

’

VOUT = 1.21 V 1+

+ (IADJ)(R2)

∆

◊

VADJ = 1.21 V

IADJ = 3 mA at 25è

Output range = 1.21 V to 20 V

Figure 29. Adjustable Operation

Submit Documentation Feedback

Product Folder Links: TL1963A-Q1

TL1963A-Q1

www.ti.com

SLVSA79A –APRIL 2010–REVISED SEPTEMBER 2016

Feature Description (continued)

The adjustable device is tested and specified with the ADJ pin tied to the OUT pin for an output voltage of

1.21 V. Specifications for output voltages greater than 1.21 V are proportional to the ratio of the desired output

voltage to 1.21 V: V_OUT/1.21 V. For example, load regulation for an output current change of 1 mA to 1.5 A is

–3 mV (typical) at V_OUT= 1.21 V. At V_OUT= 5 V, load regulation is calculated with Equation 1.

(5 V/1.21 V)(–3 mV) = –12.4 mV

(1)

7.3.2 Output Capacitance and Transient Response

The TL1963A-Q1 regulators are designed to be stable with a wide range of output capacitors. The ESR of the

output capacitor affects stability, most notably with small capacitors. A minimum output capacitor of 10 µF with

an ESR of 3 Ω or less is recommended to prevent oscillations. Larger values of output capacitance can decrease

the peak deviations and provide improved transient response for larger load current changes. Bypass capacitors,

used to decouple individual components powered by the TL1963A-Q1, increase the effective output capacitor

value.

Carefully consider the use of ceramic capacitors. Ceramic capacitors are manufactured with a variety of

dielectrics, each with different behavior over temperature and applied voltage. The most common dielectrics used

are Z5U, Y5V, X5R, and X7R. The Z5U and Y5V dielectrics are good for providing high capacitances in a small

package, but exhibit strong voltage and temperature coefficients. When used with a 5-V regulator, a 10-µF Y5V

capacitor can exhibit an effective value as low as 1 µF to 2 µF over the operating temperature range. The X5R

and X7R dielectrics result in more stable characteristics and are more suitable for use as the output capacitor.

The X7R type has better stability across temperature, while the X5R is less expensive and is available in higher

values.

Voltage and temperature coefficients are not the only sources of problems. Some ceramic capacitors have a

piezoelectric response. A piezoelectric device generates voltage across its terminals due to mechanical stress,

similar to the way a piezoelectric accelerometer or microphone works. For a ceramic capacitor the stress can be

induced by vibrations in the system or thermal transients.

7.3.3 Overload Recovery

Like many IC power regulators, the TL1963A-Q1 has safe operating area protection. The safe area protection

decreases the current limit as input-to-output voltage increases and keeps the power transistor inside a safe

operating region for all values of input-to-output voltage. The protection is designed to provide some output

current at all values of input-to-output voltage up to the device breakdown.

When power is first turned on, as the input voltage rises, the output follows the input, allowing the regulator to

start up into very heavy loads. During start-up, as the input voltage is rising, the input-to-output voltage

differential is small, allowing the regulator to supply large output currents. With a high input voltage, a problem

can occur wherein removal of an output short does not allow the output voltage to recover. Other regulators also

exhibit this phenomenon, so it is not unique to the TL1963A-Q1.

The problem occurs with a heavy output load when the input voltage is high and the output voltage is low.

Common situations are immediately after the removal of a short circuit or when the shutdown pin is pulled high

after the input voltage has already been turned on. The load line for such a load may intersect the output current

curve at two points. If this happens, there are two stable output operating points for the regulator. With this

double intersection, the input power supply may require cycling down to zero and being brought up again to

make the output recover.

7.3.4 Output Voltage Noise

The TL1963A-Q1 regulators have been designed to provide low output voltage noise over the 10-Hz to 100-kHz

bandwidth while operating at full load. Output voltage noise is typically 40 nV/√Hz over this frequency bandwidth

for the TL1963A-Q1 (adjustable version). For higher output voltages (generated by using a resistor divider), the

output voltage noise is gained up accordingly. This results in RMS noise over the 10-Hz to 100-kHz bandwidth of

14 µV_RMSfor the TL1963A-Q1, increasing to 38 µV_RMSfor the TL1963A-Q1-3.3.

Exercise care with regards to circuit layout and testing to avoid measuring higher values of output voltage.

Crosstalk from nearby traces can induce unwanted noise onto the output of the TL1963A-Q1. Power-supply

ripple rejection must also be considered; the TL1963A-Q1 regulators do not have unlimited power-supply

rejection and pass a small portion of the input noise through to the output.

Submit Documentation Feedback

Product Folder Links: TL1963A-Q1

TL1963A-Q1

SLVSA79A –APRIL 2010–REVISED SEPTEMBER 2016

www.ti.com

Feature Description (continued)

7.3.5 Protection Features

The TL1963A-Q1 regulators incorporate several protection features that make them ideal for use in battery-

powered circuits. In addition to the normal protection features associated with monolithic regulators, such as

current limiting and thermal limiting, the devices are protected against reverse input voltages, reverse output

voltages, and reverse voltages from output to input.

Current limit protection and thermal overload protection are intended to protect the device against current

overload conditions at the output of the device. For normal operation, the junction temperature must not exceed

125°C.

The input of the device withstands reverse voltages of 20 V. Current flow into the device is limited to less than

1 mA (typically less than 100 µA), and no negative voltage appears at the output. The device protects both itself

and the load. This provides protection against batteries that can be plugged in backward.

The output of the TL1963A-Q1 can be pulled below ground without damaging the device. If the input is left open

circuit or grounded, the output can be pulled below ground by 20 V. For fixed voltage versions, the output acts

like a large resistor, typically 5 kΩ or higher, limiting current flow to typically less than 600 µA. For adjustable

versions, the output acts like an open circuit; no current flows out of the pin. If the input is powered by a voltage

source, the output sources the short-circuit current of the device and protects itself by thermal limiting. In this

case, grounding the SHDN pin turns off the device and stops the output from sourcing the short-circuit current.

The ADJ pin of the adjustable device can be pulled above or below ground by as much as 7 V without damaging

the device. If the input is left open circuit or grounded, the ADJ pin acts like an open circuit when pulled below

ground and like a large resistor (typically 5 kΩ) in series with a diode when pulled above ground.

In situations where the ADJ pin is connected to a resistor divider that would pull the ADJ pin above its 7-V clamp

voltage if the output is pulled high, the ADJ pin input current must be limited to less than 5 mA. For example, a

resistor divider is used to provide a regulated 1.5-V output from the 1.21-V reference when the output is forced to

20 V. The top resistor of the resistor divider must be chosen to limit the current into the ADJ pin to less than

5 mA when the ADJ pin is at 7 V. The 13-V difference between OUT and ADJ pins divided by the 5-mA

maximum current into the ADJ pin yields a minimum top resistor value of 2.6 kΩ.

In circuits where a backup battery is required, several different input/output conditions can occur. The output

voltage may be held up while the input is either pulled to ground, pulled to some intermediate voltage, or is left

open circuit.

When the IN pin of the TL1963A-Q1 is forced below the OUT pin or the OUT pin is pulled above the IN pin, input

current typically drops to less than 2 µA. This can happen if the input of the device is connected to a discharged

(low voltage) battery and the output is held up by either a backup battery or a second regulator circuit. The state

of the SHDN pin has no effect on the reverse output current when the output is pulled above the input.

7.4 Device Functional Modes

Table 1 lists the devise states of TL1963A-Q1.

Table 1. Device States

SHDN

DEVICE STATE

Regulated voltage

Shutdown

Submit Documentation Feedback

Product Folder Links: TL1963A-Q1

TL1963A-Q1

www.ti.com

SLVSA79A –APRIL 2010–REVISED SEPTEMBER 2016

8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

This section highlights some of the design considerations when implementing this device in various applications.

8.1.1 Output Capacitance and Transient Response

The TL1963A-Q1 regulators are designed to be stable with a wide range of output capacitors. The ESR of the

output capacitor affects stability, most notably with small capacitors. A minimum output capacitor of 10 µF with

an ESR of 3 Ω or less is recommended to prevent oscillations. Larger values of output capacitance can decrease

the peak deviations and provide improved transient response for larger load current changes. Bypass capacitors,

used to decouple individual components powered by the TL1963A-Q1, increase the effective output capacitor

value.

Carefully consider the use of ceramic capacitors. Ceramic capacitors are manufactured with a variety of

dielectrics, each with different behavior over temperature and applied voltage. The most common dielectrics used

are Z5U, Y5V, X5R, and X7R. The Z5U and Y5V dielectrics are good for providing high capacitances in a small

package, but exhibit strong voltage and temperature coefficients. When used with a 5-V regulator, a 10-µF Y5V

capacitor can exhibit an effective value as low as 1 µF to 2 µF over the operating temperature range. The X5R

and X7R dielectrics result in more stable characteristics and are more suitable for use as the output capacitor.

The X7R type has better stability across temperature, while the X5R is less expensive and is available in higher

values.

Voltage and temperature coefficients are not the only sources of problems. Some ceramic capacitors have a

piezoelectric response. A piezoelectric device generates voltage across its terminals due to mechanical stress,

similar to the way a piezoelectric accelerometer or microphone works. For a ceramic capacitor, the stress can be

induced by vibrations in the system or thermal transients.

8.2 Typical Application

8.2.1 Adjustable Output Operation

OUT

2.5 V at 1 A

10 µF

4.0 µF

V_IN= 5 V

4.22 kΩ

TL1963A-Q1

SHDN

GND

ADJ

4.0 kΩ

All capacitors are ceramic

Figure 30. Adjustable Output Voltage Schematic

Submit Documentation Feedback

Product Folder Links: TL1963A-Q1

TL1963A-Q1

SLVSA79A –APRIL 2010–REVISED SEPTEMBER 2016

www.ti.com

Typical Application (continued)

8.2.1.1 Design Requirements

Table 2 lists the design requirements for this application example.

Table 2. Example Parameters

PARAMETER

VALUE

Input voltage (V_IN

)

5 V

2.5 V

Output voltage (V_OUT

)

Output current (I_OUT

)

0 A to 1 A

Load regulation

8.2.1.2 Detailed Design Procedure

The TL1963A-Q1 has an adjustable output voltage range of 1.21 V to 20 V. The output voltage is set by the ratio

of two external resistors R1 and R2 as shown in Figure 30. The device maintains the voltage at the ADJ pin at

1.21 V referenced to ground. The current in R1 is then equal to (1.21 V/R1), and the current in R2 is the current

in R1 plus the ADJ pin bias current. The ADJ pin bias current, 3 µA at 25°C, flows through R2 into the ADJ pin.

The output voltage can be calculated using Equation 2.

V_OUT= 1.21V 1+

+ I_ADJ´R2

(2)

The value of R1 must be less than 4.17 kΩ to minimize errors in the output voltage caused by the ADJ pin bias

current. Note that in shutdown the output is turned off, and the divider current is zero. For an output voltage of

2.5 V, R1 is set to 4 kΩ. R2 is then found to be 4.22 kΩ using the equation above in Equation 3.

4.22 kW

4.0 kW

V_OUT= 1.21V 1+

+ 3 mA ´ 4.22 kW

where

•

V_OUT= 2.5 V

(3)

The adjustable device is tested and specified with the ADJ pin tied to the OUT pin for an output voltage of 1.21

V. Specifications for output voltages greater than 1.21 V are proportional to the ratio of the desired output voltage

to 1.21 V = V_OUT/1.21 V. For example, load regulation for an output current change of 1 mA to 1.5 A is –2 mV

(typical) at V_OUT= 1.21 V. At V_OUT= 2.5 V, the typical load regulation is calculated with Equation 4.

2.50 V / 1.21V -2 mV = - 4.13 mV

)

(

)(

(4)

Figure 33 shows the actual change in output is approximately 3 mV for a 1-A load step. The maximum load

regulation at 25°C is –8 mV. At V_OUT= 2.5 V, the maximum load regulation is calculated with Equation 5.

2.50 V / 1.21V -8 mV = -16.53 mV

)

(

)(

(5)

Because 16.53 mV is only 0.7% of the 2.5-V output voltage, the load regulation meets the design requirements.

8.2.1.2.1 Fixed Operation

The TL1963A-Q1 can be used in a fixed voltage configuration. The SENSE/ADJ pin must be connected to OUT

for proper operation. An example of this is shown in Figure 31. The TL1963A-Q1 can also be used in this

configuration for a fixed output voltage of 2.5 V.

Submit Documentation Feedback

Product Folder Links: TL1963A-Q1

TL1963A-Q1

www.ti.com

SLVSA79A –APRIL 2010–REVISED SEPTEMBER 2016

OUT

2.5 V at 1.5 A

10 µF

(ceramic)

10 µF

(ceramic)

V_IN> 3 V

TL1963A-Q1-2.5

SHDN SENSE

GND

Figure 31. 3.3-V to 2.5-V Regulator

During fixed voltage operation, the SENSE/ADJ pin can be used for a Kelvin connection if routed separately to

the load (see Figure 32). This allows the regulator to compensate for voltage drop across parasitic resistances

(RP) between the output and the load. This becomes more crucial with higher load currents.

R_P

OUT

TL1963A-Q1

Load

V_IN

SHDN

SENSE

GND

R_P

Figure 32. Kelvin Sense Connection

8.2.1.3 Application Curve

Figure 33. 1-A Load Transient Response (C_OUT= 10 µF)

Submit Documentation Feedback

Product Folder Links: TL1963A-Q1

TL1963A-Q1

SLVSA79A –APRIL 2010–REVISED SEPTEMBER 2016

www.ti.com

8.2.2 Paralleling Regulators for Higher Output Current

0.01W

3.3 V at 3 A

OUT

= 6 V

TL1963A-3.3-Q1

22 µF

10 µF

SENSE

SHDN

GND

0.01W

OUT

5.45 kW

TL1963-Q1

SENSE

SHDN

GND

3.3 kW

2.2 kW

100 kW

TLV3691

0.01 µF

All capacitors are ceramic

Figure 34. Paralleling Regulator Schematic

8.2.2.1 Design Requirements

Table 3 lists the design requirements for this application example.

Table 3. Example Parameters

PARAMETER

VALUE

Input voltage (V_IN

)

6 V

3.3 V

3 A

Output voltage (V_OUT

)

Output current (I_OUT

)

8.2.2.2 Detailed Design Procedure

In an application requiring higher output current, an adjustable output regular can be placed in parallel with a

fixed output regulator to increase the current capacity. Two sense resistors and a comparator can be used to

control the feedback loop of the adjustable regulator to balance the current between the two regulators.

In Figure 34, resistors R1 and R2 are used to sense the current flowing into each regulator and must have a very

low resistance to avoid unnecessary power loss. R1 and R2 must have the same value and a tolerance of 1% or

better so the current is shared equally between the regulators. For this example, a value of 0.01 Ω is used.

Submit Documentation Feedback

Product Folder Links: TL1963A-Q1

TL1963A-Q1

www.ti.com

SLVSA79A –APRIL 2010–REVISED SEPTEMBER 2016

The TLV3691 rail-to-rail nanopower comparator output alternates between VIN and GND depending on the

currents flowing into each of the two regulators. To design this control circuit, begin by looking at the case where

the two output currents are approximately equal and the comparator output is low. In this case, the output of the

TL1963A-Q1 must be set the same as the fixed voltage regulator. The TL1963A-Q1-3.3 has a 3.3-V fixed output,

so this is the set point for the adjustable regulator. Begin by selecting a R7 value less than 4.17 kΩ. In this

example, 3.3 kΩ is used. R5 requires a high resistance to satisfy Equation 9, for this example 100-kΩ is chosen.

Then find the parallel resistance of R5 and R7 because they are both connected from the ADJ pin to GND using

Equation 6.

R5 ´ R7

R5 R7 =

( )

= 3.19 kW

(6)

Once the R5 and R7 parallel resistance in calculated, the value for R6 are found using Equation 7.

V_OUT

R6 =

R5 R7 - R5 R7

(

) (

)

1.22 V

3.3 V

(7)

R6 =

3.19 kW - 3.19 kW

( ) (

)

1.22 V

where

•

R6 = 5.45 kΩ

(8)

In the case where the TL1963A-Q1-3.3 is sourcing more current than TL1963A-Q1, the comparator output goes

high.

This lowers the voltage at the ADJ pin causing the TL1963A-Q1 to try and raise the output voltage by sourcing

more current. The TL1963A-Q1-3.3 then reacts by sourcing less current to try and keep the output from rising.

When the current through the TL1963A-Q1-3.3 becomes less than the TL1963A-Q1, the comparator output

returns to GND. In order for this to happen, Equation 9 must be satisfied.

+ V - V_OUT

< V

(

)

_INç

ref

R5 + R7

R5 + R6

(9)

3.3 kW

5.45 kW

+ 2.7 V

(

< 1.21V

)

100 kW + 3.3 kW

100 kW + 5.45 kW

where

•

0.33 V < 1.21 V

(10)

8.2.2.3 Application Curve

Figure 35. Parallel Regulators Sharing Load Current

Submit Documentation Feedback

Product Folder Links: TL1963A-Q1

TL1963A-Q1

SLVSA79A –APRIL 2010–REVISED SEPTEMBER 2016

www.ti.com

9 Power Supply Recommendations

The power handling capability of the device is limited by the maximum rated junction temperature (125°C). The

power dissipated by the device is made up of two components:

1. Output current multiplied by the input and output voltage differential: I_OUT(V_IN– V_OUT).

2. GND pin current multiplied by the input voltage: I_GNDV_IN.

The GND pin current can be found using the GND Pin Current graphs in Typical Characteristics. Power

dissipation is equal to the sum of the two components listed above.

The TL1963A-Q1 series regulators have internal thermal limiting designed to protect the device during overload

conditions. For continuous normal conditions, the maximum junction temperature rating of 125°C must not be

exceeded. It is important to carefully consider all sources of thermal resistance from junction to ambient.

Additional heat sources mounted nearby must also be considered.

For surface-mount devices, heat sinking is accomplished by using the heat-spreading capabilities of the PCB and

its copper traces. Copper board stiffeners and plated through-holes also can be used to spread the heat

generated by power devices.

Table 4 lists thermal resistance for several different board sizes and copper areas. All measurements were taken

in still air on 1/16-inch FR-4 board with one-ounce copper.

Table 4. KTT Package (5-Pin TO-263)

COPPER AREA

TOPSIDE⁽¹⁾

2500 mm²

1000 mm²

125 mm²

THERMAL RESISTANCE

(JUNCTION TO AMBIENT)

BOARD AREA

BACKSIDE

2500 mm²

23°C/W

25°C/W

33°C/W

(1) Device is mounted on topside.

10 Layout

10.1 Layout Guidelines

For best performance, follow the guidelines below:

•

All traces must be as short as possible.

Use wide traces for IN, OUT, and GND to minimize the parasitic electrical effects.

A minimum output capacitor of 10 µF with an ESR of 3 Ω or less is recommended to prevent oscillations. X5R

and X7R dielectrics are preferred.

•

Place the output capacitor as close as possible to the OUT pin of the device.

The exposed thermal pad of the KTT package must be connected to a wide ground plane for effective heat

dissipation.

Submit Documentation Feedback

Product Folder Links: TL1963A-Q1

TL1963A-Q1

www.ti.com

SLVSA79A –APRIL 2010–REVISED SEPTEMBER 2016

10.2 Layout Example

GND Plane for Heat Dissipation

Exposed

Thermal

Pad

SENSE

GND OUT /ADJ

SHDN IN

GPIO

GND

Via

OUT

Plane

Output

Capacitor

Via to GND Plane

Figure 36. TO-263 (KTT) Layout Example

10.3 Calculating Junction Temperature

Given an output voltage of 3.3 V, an input voltage range of 4 V to 6 V, an output current range of 0 mA to 500

mA, and a maximum ambient temperature of 50°C, what is the maximum junction temperature?

The power dissipated by the device is equal to Equation 11.

I_OUT(MAX)(V_IN(MAX)– V_OUT) + I_GND(V_IN(MAX)

)

where

•

I_OUT(MAX)= 500 mA

V_IN(MAX)= 6 V

I_GNDat (I_OUT= 500 mA, V_IN= 6 V) = 10 mA

(11)

So, P = 500 mA (6 V – 3.3 V) + 10 mA (6 V) = 1.41 W.

Using a KTT package, the thermal resistance is in the range of 23°C/W to 33°C/W, depending on the copper

area. So the junction temperature rise above ambient is approximately equal to Equation 12.

1.41 W × 28°C/W = 39.5°C

(12)

The maximum junction temperature is then be equal to the maximum junction-temperature rise above ambient

plus the maximum ambient temperature or Equation 13.

T_JMAX= 50°C + 39.5°C = 89.5°C

(13)

Submit Documentation Feedback

Product Folder Links: TL1963A-Q1

TL1963A-Q1

SLVSA79A –APRIL 2010–REVISED SEPTEMBER 2016

www.ti.com

11 Device and Documentation Support

11.1 Receiving Notification of Documentation Updates

To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper

right corner, click on Alert me to register and receive a weekly digest of any product information that has

changed. For change details, review the revision history included in any revised document.

11.2 Community Resources

The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective

contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of

Use.

TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration

among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help

solve problems with fellow engineers.

Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and

contact information for technical support.

11.3 Trademarks

E2E is a trademark of Texas Instruments.

All other trademarks are the property of their respective owners.

11.4 Electrostatic Discharge Caution

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

11.5 Glossary

SLYZ022 — TI Glossary.

This glossary lists and explains terms, acronyms, and definitions.

12 Mechanical, Packaging, and Orderable Information

The following pages include mechanical, packaging, and orderable information. This information is the most

current data available for the designated devices. This data is subject to change without notice and revision of

this document. For browser-based versions of this data sheet, refer to the left-hand navigation.

Submit Documentation Feedback

Product Folder Links: TL1963A-Q1

PACKAGE OPTION ADDENDUM

www.ti.com

10-Dec-2020

PACKAGING INFORMATION

Orderable Device

Status Package Type Package Pins Package

Eco Plan

Lead finish/

Ball material

MSL Peak Temp

Op Temp (°C)

Device Marking

Samples

Drawing

Qty

(1)

(2)

(3)

(4/5)

(6)

TL1963AQKTTRQ1

ACTIVE

DDPAK/

TO-263

KTT

500

RoHS & Green

Level-3-245C-168 HR

-40 to 125

TL1963AQ

⁽¹⁾The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs.

LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.

NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.

PREVIEW: Device has been announced but is not in production. Samples may or may not be available.

OBSOLETE: TI has discontinued the production of the device.

⁽²⁾RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance

do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may

reference these types of products as "Pb-Free".

RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.

Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based

flame retardants must also meet the <=1000ppm threshold requirement.

⁽³⁾MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.

⁽⁴⁾There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.

⁽⁵⁾Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation

of the previous line and the two combined represent the entire Device Marking for that device.

(6)

Lead finish/Ball material - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two

lines if the finish value exceeds the maximum column width.

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information

provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and

continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.

TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.

Addendum-Page 1

PACKAGE OPTION ADDENDUM

www.ti.com

10-Dec-2020

OTHER QUALIFIED VERSIONS OF TL1963A-Q1 :

Catalog: TL1963A

•

NOTE: Qualified Version Definitions:

Catalog - TI's standard catalog product

•

Addendum-Page 2

PACKAGE MATERIALS INFORMATION

www.ti.com

24-Apr-2020

TAPE AND REEL INFORMATION

*All dimensions are nominal

Device

Package Package Pins

Type Drawing

SPQ

Reel

Pin1

Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant

(mm) W1 (mm)

TL1963AQKTTRQ1

DDPAK/

TO-263

KTT

500

330.0

24.4

10.6

15.8

4.9

16.0

24.0

Pack Materials-Page 1

PACKAGE MATERIALS INFORMATION

www.ti.com

24-Apr-2020

*All dimensions are nominal

Device

Package Type Package Drawing Pins

DDPAK/TO-263 KTT

SPQ

Length (mm) Width (mm) Height (mm)

340.0 340.0 38.0

TL1963AQKTTRQ1

500

Pack Materials-Page 2

IMPORTANT NOTICE AND DISCLAIMER

TI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATASHEETS), DESIGN RESOURCES (INCLUDING REFERENCE

DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS”

AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS AND IMPLIED, INCLUDING WITHOUT LIMITATION ANY

IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD

PARTY INTELLECTUAL PROPERTY RIGHTS.

These resources are intended for skilled developers designing with TI products. You are solely responsible for (1) selecting the appropriate

TI products for your application, (2) designing, validating and testing your application, and (3) ensuring your application meets applicable

standards, and any other safety, security, or other requirements. These resources are subject to change without notice. TI grants you

permission to use these resources only for development of an application that uses the TI products described in the resource. Other

reproduction and display of these resources is prohibited. No license is granted to any other TI intellectual property right or to any third

party intellectual property right. TI disclaims responsibility for, and you will fully indemnify TI and its representatives against, any claims,

damages, costs, losses, and liabilities arising out of your use of these resources.

TI’s products are provided subject to TI’s Terms of Sale (www.ti.com/legal/termsofsale.html) or other applicable terms available either on

ti.com or provided in conjunction with such TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable

warranties or warranty disclaimers for TI products.

Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265

TL1963A-Q1 [TI]

相关型号：

TL1963A-XX

TL1963A-XX_09

TL1963A-XX_10

TL1963ADCQR

TL1963ADCQT

TL1963AKTTR

TL1963AKTTRG3

TL1963AQKTTRQ1

TL19W01-D

TL19W01-D-T32

TL19W01-L

TL19W01-L-T32