PT78NR105 [ETC]

(-)5Vout 1Amp Wide-Input Plus to Minus Voltage ISR ; （ - ） 5Vout 1Amp宽输入正至负电压ISR\n


型号：	PT78NR105
厂家：	ETC
描述：	(-)5Vout 1Amp Wide-Input Plus to Minus Voltage ISR （ - ） 5Vout 1Amp宽输入正至负电压ISR\n
文件：	总3页 (文件大小：180K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

PT78NR100 Series

1 Amp Plus to Minus Voltage

Integrated Switching Regulator

SLTS058B

(Revised 8/31/2000)

• Negative output from positive input

• Wide Input Range

• Self-Contained Inductor

• Short Circuit Protection

• Over-Temperature Protection

• Fast Transient Response

The PT78NR100 Series creates a

negative output voltage from a posi-

tive input voltage greater than 7V.

These easy-to-use, 3-terminal, Inte-

grated Switching Regulators (ISRs)

have maximum output power of 5

watts and a negative output voltage

that is laser trimmed. They also have

excellent line and load regulation.

Pin-Out Information

Ordering Information

Pin Function

PT 78NR1

XX Y

Standard Application

-V_out

Output Voltage

Package Suffix

GND

03 = -3.0 Volts

05 = -5.0 Volts

52 = -5.2 Volts

06 = -6.0 Volts

07 = -7.0 Volts

08 = -8.0 Volts

09 = -9.0 Volts

10 = -10.0 Volts

12 = -12.0 Volts

14 = -13.9 Volts

15 = -15.0 Volts

V = Vertical Mount

S = Surface Mount

H = Horizontal

Mount

Vin

-Vout

COM

PT78NR100

COM

C1 = Required 100µF electrolytic ⁽¹⁾

C2 = Required 100µF electrolytic ⁽¹⁾

Pkg Style 500

Specifications

PT78NR100 SERIES

Typ Max

Characteristics

(T = 25°C unless noted)

Symbols

Conditions

Min

Units

Output Current

I_o

Over V_inrange V_o=-5V

V_o=-6V

0.05 ⁽²⁾

—

1.00

0.8

(2)

0.05

(2)

V_o=-7, -8, -9V

0.05

0.55

0.5

V_o=-10V

0.05 ⁽²⁾

(2)

V_o=-12V

0.05

0.40

0.30

(2)

V_o=-13.9, -15V

0.05

Short Circuit Current

Inrush Current

I_sc

V_in=10V

—

4×I_max

—

Apk

I_ir

t_ir

V_in=10V

—

On start-up

0.5

mSec

Input Voltage Range

V_in

0.1 ≤ I_o≤ I_max

V_o=-5V

—

V_o=-6, -7, -8, -9V

V_o=-10, -12V

V_o=-13.9, -15V

Output Voltage Tolerance

∆V_o

Over V_inrange

—

±1.0

±3.0

%V^o

T_a=-20°C to +70°C

Over V_inrange

0.1 ≤ I_o≤ I_max

Line Regulation

Load Regulation

V_oRipple/Noise

Reg_line

Reg_load

V_n

—

±0.5

±2

±1.0

—

%V_o

V_in=10V, I_o=I_max

Transient Response

(with 100µF output cap)

t_tr

50% load change

V_oover/undershoot

—

100

5.0

250

—

µSec

%V_o

Efficiency

V_in=10V, I_o=0.5×I_max,V_o= -5V

—

Switching Frequency

ƒ_o

T_a

Over V_inand I_oranges

600

650

700

kHz

Absolute Maximum

Operating Temperaturte Range

Free Air Convection, (40-60LFM)

Over V_inRange

-40

—

+85 ⁽³⁾

°C

Thermal Resistance

Storage Temperature

Mechanical Shock

θ_ja

T_s

—

Free Air Convection, (40-60LFM)

—

°C/W

°C

-40

—

+125

—

Per Mil-STD-883D, Method 2002.3

500

G’s

Mechanical Vibration

Per Mil-STD-883D, Method 2007.2,

20-2000 Hz, soldered in a PC board

—

G’s

Weight

—

6.5

Grams

Notes: (1) The PT78NR100 Series requires a 100µF electrolytic or tantalum capacitor at both the input and output for proper operation in all applications. The input

capacitor, C₁must have a ripple current rating ≥600 mArms, and an ESR ≤0.2Ω.

(2) The ISR will operate down to no load with reduced specifications.

(3) See Thermal Derating chart.

For technical support and more information, see inside back cover or visit www.ti.com/powertrends

Typical Characteristics

PT78NR100 Series

1 Amp Plus to Minus Voltage

Integrated Switching Regulator

PT78NR105 -5.0 VDC (See Note A)

PT78NR109 -9.0 VDC (See Note A)

PT78NR112 -12.0 VDC (See Note A)

Efficiency vs Output Current

100

Vin

V_IN

Vin

7.0V

12.0V

15.0V

20.0V

25.0V

7.0V

9.0V

7.0V

12.0V

15.0V

18.0V

12.0V

15.0V

18.0V

21.0V

0.2

0.4

0.6

0.8

0.1

0.2

0.3

0.4

0.5

0.1

0.2

0.3

0.4

Iout-(Amps)

Ripple vs Output Current

200

160

120

200

160

120

250

200

150

100

Vin

21.0V

V_IN

25.0V

18.0V

15.0V

12.0V

9.0V

20.0V

15.0V

12.0V

7.0V

18.0V

15.0V

12.0V

7.0V

0.2

0.4

0.6

0.8

0.1

0.2

0.3

0.4

0.1

0.2

0.3

0.4

0.5

Iout-(Amps)

Thermal Derating (T ) (See Note B)

0.4

0.35

0.3

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.6

0.5

0.4

0.3

0.2

0.1

60°C

70°C

85°C

0.25

0.2

85°C

0.15

0.1

0.05

Vin-(Volts)

Power Dissipation vs Output Current

1.6

1.4

1.2

1.8

1.6

1.4

1.2

1.6

1.4

1.2

Vin

21.0V

V_IN

25.0V

18.0V

15.0V

12.0V

9.0V

20.0V

15.0V

12.0V

7.0V

18.0V

15.0V

12.0V

7.0V

0.8

0.6

0.4

0.2

0.8

0.6

0.4

0.2

0.8

0.6

0.4

0.2

7.0V

0.1

0.2

0.3

0.4

0.5

0.2

0.4

0.6

0.8

0.1

0.2

0.3

0.4

Iout-(Amps)

Note A: All data listed in the above graphs, except for derating data, has been developed from actual products tested at 25°C. This data is considered typical data for the ISR.

Note B: Thermal derating graphs are developed in free air convection cooling of 40-60 LFM. (See Thermal Application Notes.)

For technical support and more information, see inside back cover or visit www.ti.com/powertrends

IMPORTANT NOTICE

Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue

any product or service without notice, and advise customers to obtain the latest version of relevant information

to verify, before placing orders, that information being relied on is current and complete. All products are sold

subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those

pertaining to warranty, patent infringement, and limitation of liability.

TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in

accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent

TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily

performed, except those mandated by government requirements.

Customers are responsible for their applications using TI components.

In order to minimize risks associated with the customer’s applications, adequate design and operating

safeguards must be provided by the customer to minimize inherent or procedural hazards.

TI assumes no liability for applications assistance or customer product design. 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 of TI covering or relating to any combination, machine, or process in which such

semiconductor products or services might be or are used. TI’s publication of information regarding any third

party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.

PT78NR105 [ETC]

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