UC2577TDTR-ADJ [TI]

6A SWITCHING REGULATOR, 52kHz SWITCHING FREQ-MAX, PSSO5;


型号：	UC2577TDTR-ADJ
厂家：	TEXAS INSTRUMENTS
描述：	6A SWITCHING REGULATOR, 52kHz SWITCHING FREQ-MAX, PSSO5 开关
文件：	总15页 (文件大小：899K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

UC2577-ADJ

Simple Step-Up Voltage Regulator

FEATURES

DESCRIPTION

•

Requires Few External Components

The UC2577-ADJ device provides all the active functions neces-

sary to implement step-up (boost), flyback, and forward converter

switching regulators. Requiring only a few components, these sim-

ple regulators efficiently provide up to 60V as a step-up regulator,

and even higher voltages as a flyback or forward converter regula-

tor.

NPN Output Switches 3.0A, 65V(max)

Extended Input Voltage Range: 3.0V to 40V

Current Mode Operation for Improved

Transient Response, Line Regulation, and

Current Limiting

The UC2577-ADJ features a wide input voltage range of 3.0V to

40V and an adjustable output voltage. An on-chip 3.0A NPN switch

is included with undervoltage lockout, thermal protection circuitry,

and current limiting, as well as soft start mode operation to reduce

current during startup. Other features include a 52kHz fixed fre-

quency on-chip oscillator with no external components and current

mode control for better line and load regulation.

•

Soft Start Function Provides Controlled

Startup

•

52kHz Internal Oscillator

Output Switch Protected by Current Limit,

Undervoltage Lockout and Thermal

Shutdown

A standard series of inductors and capacitors are available from

several manufacturers optimized for use with these regulators and

are listed in this data sheet.

•

Improved Replacement for LM2577-ADJ

Series

TYPICAL APPLICATIONS

CONNECTION DIAGRAM

5-Pin TO-220 (Top View)

•

Simple Boost and Flyback Converters

•

SEPIC Topology Permits Input Voltage to

be Higher or Lower than Output Voltage

•

Transformer Coupled Forward Regulators

Multiple Output Designs

Also available in TO-263 Package.

BLOCK DIAGRAM

UDG-94034

3/97

UC2577-ADJ

ABSOLUTE MAXIMUM RATINGS (Note 1)

RECOMMENDED OPERATING RANGE

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . 3.0V ≤ VIN ≤ 40V

Output Switch Voltage . . . . . . . . . . . . . . . 0V ≤ VSWITCH ≤ 60V

Output Switch Current . . . . . . . . . . . . . . . . . . . . ISWITCH ≤ 3.0A

Junction Temperature Range . . . . . . . . . . −40°C ≤ TJ ≤ +125°C

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45V

Output Switch Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65V

Output Switch Current (Note 2) . . . . . . . . . . . . . . . . . . . . . 6.0A

Power Dissipation. . . . . . . . . . . . . . . . . . . . . . Internally Limited

Storage Temperature Range . . . . . . . . . . . . . −65°C to +150°C

Lead Temperature (Soldering, 10 sec.) . . . . . . . . . . . . . . 260°C

Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . 150°C

Minimum ESD Rating (C = 100pF, R = 15kΩ) . . . . . . . . . . . 2kV

Unless otherwise stated, these specifications apply for TA = −40°C to +125°C, VIN =

5V, VFB = VREF, ISWITCH = 0, and TA =TJ.

ELECTRICAL CHARACTERISTICS

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX UNITS

System Parameters Circuit Figure 1 (Note 3)

Output Voltage

Line Regulation

Load Regulation

VIN = 5V to 10V, ILOAD = 100mA to 800mA

TJ = 25°C

11.40 12.0 12.60

11.60

12.40

100

VIN = 3.0V to 10V, ILOAD = 300mA

TJ = 25°C

VIN = 5V, ILOAD = 100mA to 800mA

TJ = 25°C

100

Efficiency

VIN = 5V, ILOAD = 800mA

Device Parameters

Input Supply Current

VFB = 1.5V (Switch Off)

7.5

TJ = 25°C

ISWITCH = 2.0A, VCOMP = 2.0V (Max Duty Cycle)

TJ = 25°C

Input Supply UVLO

Oscillator Frequency

Reference Voltage

ISWITCH = 100mA

2.70

2.95

2.85

TJ = 25°C

Measured at SWITCH Pin, ISWITCH = 100mA

kHz

TJ = 25°C

Measured at FB Pin, VIN = 3.0V to 40V, VCOMP = 1.0V

1.206 1.230 1.254

TJ = 25°C

1.214

1.246

Reference Voltage Line Regulation

Error Amp Input Bias Current

VIN = 3.0V to 40V

VCOMP = 1.0V

0.5

µmho

V/V

100

800

300

TJ = 25°C

Error Amp Transconductance

Error Amp Voltage Gain

ICOMP = −30µA to +30µA, VCOMP = 1.0V

TJ = 25°C

1600 3700 5800

2400

250

500

2.0

4800

VCOMP = 0.8V to 1.6V, RCOMP = 1.0MW (Note 4)

TJ = 25°C

800

2.4

0.3

Error Amplifier Output Swing

Upper Limit VFB = 1.0V

TJ = 25°C

2.2

Lower Limit VFB = 1.5V

TJ = 25°C

0.55

0.40

Error Amp Output Current

Soft Start Current

VFB = 1.0V to 1.5V, VCOMP = 1.0V

TJ = 25°C

200

5.0

400

µA

130

300

VFB = 1.0V, VCOMP = 0.5V

TJ = 25°C

1.5

2.5

9.5

7.5

Maximum Duty Cycle

VCOMP = 1.5V, ISWITCH = 100mA

TJ = 25°C

UC2577-ADJ

Unless otherwise stated, these specifications apply for TA = −40°C to +125°C, VIN =

5V, VFB = VREF, ISWITCH = 0, and TA =TJ.

ELECTRICAL CHARACTERISTICS

PARAMETER

Device Parameters (cont.)

Switch Transconductance

TEST CONDITIONS

MIN

TYP

MAX UNITS

12.5

A/V

Switch Leakage Current

VSWITCH = 65V, VFB = 1.5V (Switch Off)

600

300

0.9

0.7

6.0

µA

TJ = 25°C

Switch Saturation Voltage

ISWITCH = 2.0A, VCOMP = 2.0V (Max Duty Cycle)

0.5

TJ = 25°C

NPN Switch Current Limit

Thermal Resistance

VCOMP = 2.0V

Junction to Ambient

Junction to Case

VCOMP = 0

3.0

4.3

°C/W

µA

COMP Pin Current

TJ = 25°C

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating ratings

indicate conditions during which the device is intended to be functional, but device parameter specifications may not be

guaranteed under these conditions. For guaranteed specifications and test conditions, see the Electrical Characteristics.

Note 2: Output current cannot be internally limited when the UC2577 is used as a step-up regulator. To prevent damage to

the switch, its current must be externally limited to 6.0A. However, output current is internally limited when the UC2577 is

used as a flyback or forward converter regulator.

Note 3. External components such as the diode, inductor, input and output capacitors can affect switching regulator

performance. When the UC2577 is used as shown in the Test Circuit, system performance will be as specified by the

system parameters.

Note 4: A 1.0MΩ resistor is connected to the compensation pin (which is the error amplifier’s output) to ensure accuracy in

measuring AVOL. In actual applications, this pin’s load resistance should be ≥ 10MΩ, resulting in AVOL that is typically twice

the guaranteed minimum limit.

UDG-94035

L = 415-0930 (AIE)

COUT = Sprague Type 673D

R1 = 48.7k in series with 511Ω (1%)

Electrolytic 680µF, 20V

D = any manufacturer

R2 = 5.62k (1%)

Figure 1. Circuit Used to Specify System Parameters

UC2577-ADJ

APPLICATIONS INFORMATION

Step-up (Boost) Regulator

The Block Diagram shows a step-up switching regulator

utilizing the UC2577. The regulator produces an output

voltage higher than the input voltage. The UC2577 turns

its switch on and off at a fixed frequency of 52kHz, thus

storing energy in the inductor (L). When the NPN switch

is on, the inductor current is charged at a rate of VIN/L.

When the switch is off, the voltage at the SWITCH termi-

nal of the inductor rises above VIN, discharging the

stored current through the output diode (D) into the out-

put capacitor (COUT) at a rate of (VOUT - VIN)/L. The en-

ergy stored in the inductor is thus transferred to the

output.

VOUT + VF − VIN

VOUT − VIN

Duty Cycle

≈

VOUT

VOUT + VF − VSAT

ILOAD

1 − D

Avg. Inductor

Current

IIND(AVG)

∆IIND

VIN − VSAT

Inductor

Current Ripple

•

52,000

∆IIND

ILOAD

1−D

Peak Inductor

Current

IIND(PK)

ISW(PK)

∆IIND

ILOAD

1−D

Peak Switch

Current

The output voltage is controlled by the amount of energy

transferred, which is controlled by modulating the peak

inductor current. This modulation is accomplished by

feeding a portion of the output voltage to an error ampli-

fier which amplifies the difference between the feedback

voltage and an internal 1.23V precision reference volt-

age. The output of the error amplifier is then compared to

a voltage proportional to the switch current, or the induc-

tor current, during the switch on time. A comparator ter-

minates the switch on time when the two voltages are

equal and thus controls the peak switch current to main-

tain a constant output voltage. Figure 2 shows voltage

and current waveforms for the circuit. Formulas for calcu-

lation are shown in Figure 3.

Switch Voltage

when Off

VSW(OFF)

VOUT + VF

VOUT - VSAT

ILOAD

Diode Reverse

Voltage

Avg. Diode

Current

ID(AVG)

∆IIND

ILOAD

1−D

Peak Diode

Current

ID(PK)

Power

Dissipation

ILOAD • D • VIN

50 (1−D)

ILOAD

0.25Ω

D +

STEP-UP REGULATOR DESIGN PROCEDURE

1−D

Refer to the Block Diagram

Given:

VF = Forward Biased Diode Voltage, ILOAD = Output Load

VINmin = Minimum input supply voltage

VOUT = Regulated output voltage

Figure 3. Step-up Regulator Formulas

First, determine if the UC2577 can provide these values

of VOUT and ILOADmax when operating with the minimum

value of VIN. The upper limits for VOUT and ILOADmax are

given by the following equations.

VOUT ≤ 60V and

VOUT ≤ 10 • VINmin

2.1A • V^INmin

I^LOADmax≤

V^OUT

These limits must be greater than or equal to the values

specified in this application.

1. Output Voltage Section

Resistors R1 and R2 are used to select the desired out-

put voltage. These resistors form a voltage divider and

present a portion of the output voltage to the error ampli-

fier which compares it to an internal 1.23V reference. Se-

lect R1 and R2 such that:

R2 1.23V

V^OUT

− 1

Figure 2. Step-up Regulator Waveforms

UC2577-ADJ

APPLICATIONS INFORMATION (cont.)

2. Inductor Selection (L)

A. Preliminary Calculations

To select the inductor, the calculation of the following

three parameters is necessary:

If Lmin is smaller than the inductor values found in step

B1, go on to step C. Otherwise, the inductor value found

in step B1 is too low; an appropriate inductor code

should be obtained from the graph as follows:

Dmax, the maximum switch duty cycle (0 ≤ D ≤ 0.9):

1. Find the lowest value inductor that is greater than

Lmin .

2. Find where E • T intersects this inductor value to

determine if it has an L or H prefix. If E • T intersects

both the L and H regions, select the inductor with an

H prefix.

V^OUT+ V^F− V^INmin

D^max=

V^OUT+ V^F− 0.6V

where typically VF = 0.5V for Schottky diodes and VF =

0.8V for fast recovery diodes.

E • T, the product of volts • time that charges the induc-

tor:

C. Inductor Selection

Select an inductor from the table of Figure 5 which cross

references the inductor codes to the part numbers of the

three different manufacturers. The inductors listed in this

table have the following characteristics:

D^max• (V^INmin− 0.6V)10

E • T =

(V• µs)

52,000Hz

IIND, DC, the average inductor current under full load:

AIE (ferrite, pot-core inductors): Benefits of this type

are low etectromagnetic interference (EMI), small

physical size, and very low power dissipation (core

loss).

1.05 • I^LOADmax

I^{IND, DC}=

1 − D^max

B. Identify Inductor Value:

1. From Figure 4, identify the inductor code for the region

indicated by the intersection of E • T and IIND, DC. This

code gives the inductor value in microhenries. The L or H

prefix signifies whether the inductor is rated for a maxi-

mum E • T of 90Vµs (L) or 250Vµs (H).

Pulse (powdered iron, toroid core inductors): Bene-

fits are low EMI and ability to withstand E • T and

peak current above rated value better than ferrite

cores.

Renco (ferrite, bobbin-core inductors): Benefits are

low cost and best ability to withstand E • T and peak

current above rated value. Be aware that these in-

ductors generate more EMI than the other types, and

this may interfere with signals sensitive to noise.

2. If D < 0.85, go to step C. If D ≥ 0.85, calculate the

minimum inductance needed to ensure the switching

regulator’s stability:

200

H2200

150

H1000

H680

H470

H330

H220

H1500

100

H150

L680

L470

L330

L220

L150

L100

L68

L47

0.3 0.35 0.4 0.45 0.5 0.6 0.7 0.8 0.9 1.0

1.5

2.0

2.5 3.0

IND, DC (A)

Note: This chart assumes that the inductor ripple current inductor is approximately 20% to 30% of the average inductor current

(when the regulator is under full load). Greater ripple current causes higher peak switch currents and greater output ripple volt-

age. Lower ripple current is achieved with larger value inductors. The factor of 20% to 30% is chosen as a convenient balance

between the two extremes.

Figure 4. Inductor Selection Graph

UC2577-ADJ

APPLICATIONS INFORMATION (cont.)

Inductor

Code

Manufacturer’s Part Number

V^INmin• R^C• (V^INmin+ (3.74 • 10 • L))

C^OUT≥

AIE

Pulse

Renco

487,800 • V^OUT

L47

L68

415 - 0932

415 - 0931

415 - 0930

415 - 0953

415 - 0922

415 - 0926

415 - 0927

415 - 0928

415 - 0936

430 - 0636

430 - 0635

430 - 0634

415 - 0935

415 - 0934

415 - 0933

415 - 0945

PE - 53112

PE - 92114

PE - 92108

PE - 53113

PE - 52626

PE - 52627

PE - 53114

PE - 52629

PE - 53115

PE - 53116

PE - 53117

PE - 53118

PE - 53119

PE - 53120

PE - 53121

PE - 53122

RL2442

RL2443

RL2444

RL1954

RL1953

RL1952

RL1951

RL1950

RL2445

RL2446

RL2447

RL1961

RL1960

RL1959

RL1958

RL2448

The larger of these two values is the minimum value that

ensures stability.

L100

L150

L220

L330

L470

L680

H150

H220

H330

H470

H680

H1000

H1500

H2200

C. Calculate the minimum value of CC.

58.5 • V^OUT• C^OUT

C^C≥

R^C• V^INmin

The compensation capacitor is also used in the soft start

function of the regulator. When the input voltage is ap-

plied to the part, the switch duty cycle is increased slowly

at a rate defined by the compensation capacitor and the

soft start current, thus eliminating high input currents.

Without the soft start circuitry, the switch duty cycle would

instantly rise to about 90% and draw large currents from

the input supply. For proper soft starting, the value for CC

should be equal or greater than 0.22µF.

AIE Magnetics, Div. Vernitron Corp., (813)347-2181

2801 72nd Street North, St. Petersburg, FL 33710

Pulse Engineering, (619)674-8100

12220 World Trade Drive, San Diego, CA 92128

Renco Electronics, Inc., (516)586-5566

Figure 6 lists several types of aluminum electrolytic ca-

pacitors which could be used for the output filter. Use the

following parameters to select the capacitor.

Working Voltage (WVDC): Choose a capacitor with a

working voltage at least 20% higher than the regulator

output voltage.

60 Jeffryn Blvd. East, Deer Park, NY 11729

Figure 5. Table of Standardized Inductors and

Manufacturer’s Part Numbers

Ripple Current: This is the maximum RMS value of cur-

rent that charges the capacitor during each switching cy-

cle. For step-up and flyback regulators, the formula for

ripple current is:

3. Compensation Network (RC, CC) and Output

Capacitor (COUT) Selection

The compensation network consists of resistor RC and

capacitor CC which form a simple pole-zero network and

stabilize the regulator. The values of RC and CC depend

upon the voltage gain of the regulator, ILOADmax, the in-

I^LOADmax• D^max

I^RIPPLErms=

1 − D^max

Choose a capacitor that is rated at least 50% higher than

ductor L, and output capacitance COUT. A procedure to this value at 52kHz.

calculate and select the values for RC, CC, and COUT

Equivalent Series Resistance (ESR): This is the primary

which ensures stability is described below. It should be

noted, however, that this may not result in optimum com-

pensation. To guarantee optimum compensation a stand-

ard procedure for testing loop stability is recommended,

such as measuring VOUT transient responses to pulsing

ILOAD.

cause of output ripple voltage, and it also affects the val-

ues of RC and CC needed to stabilize the regulator. As a

result, the preceding calculations for CC and RC are only

valid if the ESR does not exceed the maximum value

specified by the following equations.

−3

0.01 • 15V

I^RIPPLE⁽P−P)

8.7 • 10 • V^IN

ESR ≤

and ≤

where

A. Calculate the maximum value for RC.

I^LOADmax

750 • I^LOADmax• V^OUT

1.15 • I^LOADmax

1 − D^max

R^C≤

I^RIPPLE⁽^P⁻^P⁾=

V^INmin

Select a resistor less than or equal to this value, not to

exceed 3kΩ.

Select a capacitor with an ESR, at 52kHz, that is less

than or equal to the lower value calculated. Most electro-

lytic capacitors specify ESR at 120kHz which is 15% to

30% higher than at 52kHz. Also, note that ESR increases

by a factor of 2 when operating at −20°C.

B. Calculate the minimum value for COUT using the fol-

lowing two equations.

0.19 • L • R^C• I^LOADmax

In general, low values of ESR are achieved by using

large value capacitors (C ≥ 470µF), and capacitors with

high WVDC, or by paralleling smaller value capacitors.

C^OUT≥

and

V^INmin• V^OUT

UC2577-ADJ

APPLICATIONS INFORMATION (cont.)

4. Input Capacitor Selection (CIN)

Schottky

1N5817

Fast Recovery

VOUTmax

To reduce noise on the supply voltage caused by the

switching action of a step-up regulator (ripple current

noise), VIN should be bypassed to ground. A good qual-

ity 0.1µF capacitor with low ESR should provide suffi-

cient decoupling. If the UC2577 is located far from the

supply source filter capacitors, an additional electrolytic

(47µF, for example) is required.

1N5820

20V

MBR120P MBR320P

1N5818 1N5821

MBR130P MBR330P

30V

40V

11DQ03

1N5819

31DQ03

1N5822

MBR140P MBR340P

11DQ04 31DQ04

MBR150 MBR350

11DQ05 31DQ05

Nichicon - Types PF, PX, or PZ

927 East StateParkway, Schaumburg, IL 60173

(708)843-7500

1N4933

MUR105

1N4934

MUR110

10DL1

50V

MR851

30DL1

MR831

United Chemi-CON - Types LX, SXF, or SXJ

9801 West Higgens, Rosemont, IL 60018

(708)696-2000

100V

Figure 6. Aluminum Electrolytic Capacitors Recommended

for Switching Regulators

MBRxxx and MURxxx are manufactured by Motorola.

1DDxxx, 11Cxx and 31Dxx are manufactured by

International Rectifier

5. Output Diode Selection (D)

In the step-up regulator, the switching diode must with-

stand a reverse voltage and be able to conduct the peak

output current of the UC2577. Therefore a suitable diode

must have a minimum reverse breakdown voltage

greater than the circuit output voltage, and should also

be rated for average and peak current greater than

ILOADmax and IDpk. Because of their low forward voltage

drop (and thus higher regulator efficiencies), Schottky

barrier diodes are often used in switching regulators. Re-

fer to Figure 7 for recommended part numbers and volt-

age ratings of 1A and 3A diodes.

Figure 7. Diode Selection Chart

ORDERING INFORMATION

Unitrode Type Number

UC2577TKC-ADJ

5 Pin TO-220 Plastic Pkg -50 pc Tube

UC2577TDKTTT-ADJ 5 Pin TO-263 Plastic Pkg -50 pc Reel

UC2577TDTR-ADJ 5 Pin TO-263 Plastic Pkg -500 pc Reel

UNITRODE CORPORATION

7 CONTINENTAL BLVD. • MERRIMACK, NH 03054

TEL. (603) 424-2410 • FAX (603) 424-3460

PACKAGE OPTION ADDENDUM

www.ti.com

9-Aug-2013

PACKAGING INFORMATION

Orderable Device

UC2577T-ADJ

Status Package Type Package Pins Package

Eco Plan Lead/Ball Finish

MSL Peak Temp

Op Temp (°C)

-40 to 125

Device Marking

Samples

Drawing

Qty

(1)

(2)

(3)

(4/5)

ACTIVE

TO-220

Green (RoHS

& no Sb/Br)

CU SN

Call TI

CU SN

Call TI

N / A for Pkg Type

Call TI

UC2577T-ADJ

UC2577T-ADJG3

ACTIVE

Green (RoHS

& no Sb/Br)

UC2577T-ADJ

UC2577TD-ADJ

OBSOLETE DDPAK/

TO-263

KTT

TBD

UC2577TDKTTT-ADJ

UC2577TDKTTT-ADJG3

UC2577TDTR-ADJ

UC2577TDTR-ADJG3

ACTIVE

DDPAK/

TO-263

Green (RoHS

& no Sb/Br)

Level-2-260C-1 YEAR

Call TI

UC2577TD-ADJ

DDPAK/

TO-263

Green (RoHS

& no Sb/Br)

DDPAK/

TO-263

TBD

DDPAK/

TO-263

TBD

Call TI

⁽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⁾Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability

information and additional product content details.

TBD: The Pb-Free/Green conversion plan has not been defined.

Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that

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

Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between

the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.

Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight

in homogeneous material)

⁽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.

Addendum-Page 1

PACKAGE OPTION ADDENDUM

www.ti.com

9-Aug-2013

⁽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.

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 2

PACKAGE MATERIALS INFORMATION

www.ti.com

12-Aug-2013

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)

UC2577TDKTTT-ADJ

DDPAK/

TO-263

KTT

330.0

24.4

10.6

15.6

4.9

16.0

24.0

Pack Materials-Page 1

PACKAGE MATERIALS INFORMATION

www.ti.com

12-Aug-2013

*All dimensions are nominal

Device

Package Type Package Drawing Pins

DDPAK/TO-263 KTT

SPQ

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

367.0 367.0 45.0

UC2577TDKTTT-ADJ

Pack Materials-Page 2

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. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale

supplied at the time of order acknowledgment.

TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms

and conditions of sale of semiconductor products. Testing and other quality control techniques are used to the extent TI deems necessary

to support this warranty. Except where mandated by applicable law, testing of all parameters of each component is not necessarily

performed.

TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and

applications using TI components. To minimize the risks associated with Buyers’ products and applications, Buyers should provide

adequate design and operating safeguards.

TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or

other intellectual property right relating to any combination, machine, or process in which TI components or services are used. Information

published by TI regarding third-party products or services does not constitute a license to use such products or services or a warranty or

endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the

third party, or a license from TI under the patents or other intellectual property of TI.

Reproduction of significant portions of TI information in TI data books or data sheets is permissible only if reproduction is without alteration

and is accompanied by all associated warranties, conditions, limitations, and notices. TI is not responsible or liable for such altered

documentation. Information of third parties may be subject to additional restrictions.

Resale of TI components or services with statements different from or beyond the parameters stated by TI for that component or service

voids all express and any implied warranties for the associated TI component or service and is an unfair and deceptive business practice.

TI is not responsible or liable for any such statements.

Buyer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-related requirements

concerning its products, and any use of TI components in its applications, notwithstanding any applications-related information or support

that may be provided by TI. Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which

anticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of failures that might cause

harm and take appropriate remedial actions. Buyer will fully indemnify TI and its representatives against any damages arising out of the use

of any TI components in safety-critical applications.

In some cases, TI components may be promoted specifically to facilitate safety-related applications. With such components, TI’s goal is to

help enable customers to design and create their own end-product solutions that meet applicable functional safety standards and

requirements. Nonetheless, such components are subject to these terms.

No TI components are authorized for use in FDA Class III (or similar life-critical medical equipment) unless authorized officers of the parties

have executed a special agreement specifically governing such use.

Only those TI components which TI has specifically designated as military grade or “enhanced plastic” are designed and intended for use in

military/aerospace applications or environments. Buyer acknowledges and agrees that any military or aerospace use of TI components

which have not been so designated is solely at the Buyer's risk, and that Buyer is solely responsible for compliance with all legal and

regulatory requirements in connection with such use.

TI has specifically designated certain components as meeting ISO/TS16949 requirements, mainly for automotive use. In any case of use of

non-designated products, TI will not be responsible for any failure to meet ISO/TS16949.

Products

Applications

Audio

www.ti.com/audio

amplifier.ti.com

dataconverter.ti.com

www.dlp.com

Automotive and Transportation www.ti.com/automotive

Communications and Telecom www.ti.com/communications

Amplifiers

Data Converters

DLP® Products

DSP

Computers and Peripherals

Consumer Electronics

Energy and Lighting

Industrial

www.ti.com/computers

www.ti.com/consumer-apps

www.ti.com/energy

dsp.ti.com

Clocks and Timers

Interface

www.ti.com/clocks

interface.ti.com

logic.ti.com

www.ti.com/industrial

www.ti.com/medical

Medical

Logic

Security

www.ti.com/security

Power Mgmt

Microcontrollers

RFID

power.ti.com

Space, Avionics and Defense

Video and Imaging

www.ti.com/space-avionics-defense

www.ti.com/video

microcontroller.ti.com

www.ti-rfid.com

www.ti.com/omap

OMAP Applications Processors

Wireless Connectivity

TI E2E Community

e2e.ti.com

www.ti.com/wirelessconnectivity

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

UC2577TDTR-ADJ [TI]

相关型号：

UC2577TDTR-ADJG3

UC2577TKC-ADJ

UC2578

UC2578DP

UC2578DPG4

UC2578DPTR

UC2578DPTRG4

UC2578N

UC2578NG4

UC2578_16

UC2584

UC2584DW